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Publikationen

Publications of Prof. Dr.-Ing. Werner Hofmann

Publications (co-)authored by Werner Hofmann (as first author in brackets)

Hirsch (h) Faktor                                                               26 {Google Scholar Cites}

Number of publications:                                             152   (56)

in books:                                                                        4     (2)

in journals:                                                                   52   (14)

invited:                                                                          7     (4)

conference contributions:                                              96   (40)

post-deadline:                                                                 6     (2)

invited:                                                                           24    (16)

Best-Poster-Awards:                                                      4     (1)

Selected Journal and Conference Publications of Werner Hofmann

Nano-Photonic Sensing:

1.      A. Liu, W. Hofmann, D. Bimberg, "Integrated High-Contrast-Grating Optical Sensor Using Guided Mode," IEEE J. Quantum Electron., 51, 14806656, 2014.

Sensing and Medical Applications:

2.      S. Fard, W. Hofmann, P. Fard, G. Böhm, M. Ortsiefer, E. Kwok, M.-C. Amann, L. Chrostowski, "Optical Absorption Glucose Measurements Using 2.3-µm Vertical-Cavity Semiconductor Lasers," Photon. Technol. Lett., 20, 960-932, 2008.

Long Wavelength High-Speed VCSEL:

3.      W. Hofmann, M. Müller, P. Wolf, A. Mutig, T. Gründl, G. Böhm, D. Bimberg, and M.-C. Amann, "40 Gbit/s modulation of 1550 nm VCSEL," Electron. Lett., 47, 270-271, 2011.

Near Infrared High-Speed VCSEL:

4.      P. Wolf, P. Moser, G. Larisch, W. Hofmann, D. Bimberg, "High-Speed and Temperature-Stable, Oxide-Confined 980-nm VCSELs for Optical Interconnects," IEEE J. Sel. Top. Quantum Electron., 19, 1701207, 2013.

Simulation of Nano-Photonic Elements:

5.      A. Liu, W. Hofmann, and D. Bimberg, "Two dimensional analysis of finite size high-contrast gratings for applications in VCSELs," Optics Express, 22, 11804-11811, 2014.

HCG VCSEL:

6.      W. Hofmann, C. Chase, M. Müller, Y. Rao, C. Grasse, G. Böhm, M.-C. Amann, and C. Chang-Hasnain: "Long-Wavelength High-Contrast Grating Vertical-Cavity Surface- Emitting Laser," IEEE Photon. J., 2, 415 - 422, 2010.

Ultra High-Speed VCSEL:

7.      W. Hofmann, P. Moser, P. Wolf, A. Mutig, M. Kroh, and D. Bimberg, "44 Gb/s VCSEL for optical interconnects," Optical Fiber Communication Conference and Exposition (OFC/NFOEC), Post-Deadline Paper, 2011.

Energy Efficient VCSEL:

8.      P. Moser, W. Hofmann, P. Wolf, J. Lott, G. Larisch, A. Payusov, N. Ledentsov, and D. Bimberg, "81 fJ/bit energy-to-data ratio of 850 nm vertical-cavity surface-emitting lasers for optical interconnects," Appl. Phys. Lett., 98, 231106, 2011.

VCSEL in Supercomputing:

9.      W. Hofmann, and D. Bimberg, "VCSEL-Based Light Sources—Scalability Challenges for VCSEL-Based Multi-100-Gb/s Systems," IEEE Photon. J., 4, 1831-1843, 2012.

Books and Book Chapters (co-) authored by Werner Hofmann

1.      M. Ortsiefer, W. Hofmann, J. Rosskopf, and M.-C. Amann: "Long-Wavelength VCSELs with Buried Tunnel Junction", Chapter in VCSELs: Fundamentals, Technology and Applications of Vertical-Cavity Surface-Emitting Lasers, pp. 321-351, Ed. R. Michalzik, Springer-Verlag, Berlin, Springer Series in Optical Sciences, Vol. 166, ISBN 978-3-642-24986-0, 2013.

2.      Norbert Grote, Martin Moehrle, and Werner Hofmann: "Laser Components", Chapter 3 in Fibre Optic Communication – Key Devices, pp. 99-138, Eds. H. Venghaus, N. Grote, Springer Series in Optical Sciences, Vol. 161, Berlin, ISBN 978-3-642-20517-0, 2012.

3.      Werner Hofmann: "Vertical-Cavity Surface-Emitting Lasers for Interconnects", Chapter 5 in High-Speed Photonics Interconnects, Eds. L. Chrostowski, K. Iniewski, CRC Press, to be published in 2013.

4.      W. Hofmann: InP-based long-wavelength VCSELs and VCSEL arrays for high-speed optical communication, Eds. G. Abstreiter, M.-C. Amann, M. Stutzmann and P. Vogl, Sel. Top. in Semiconductor Physics and Technol., Vol. 99, Munich, ISBN 978-3-932749-99-5, 2009.

Publications in Journal Papers (co-) authored by Werner Hofmann

  1. W. Hamad, S. Wanckel, W. Hofmann, "Small-Signal Analysis of Ultra-High-Speed Multi-Mode VCSELs," IEEE J. Quantum Electron., JQE-134292-2016, in press, 2016.
  2. A. Liu, W. Hofmann, D. Bimberg, "Integrated High-Contrast-Grating Optical Sensor Using Guided Mode," IEEE J. Quantum Electron., 51, 14806656, 2014.

3.      A. Liu, W. Hofmann, and D. Bimberg, “Two dimensional analysis of finite size high-contrast gratings for applications in VCSELs”, Optics Express, Vol. 22, Issue 10, pp. 11804-11811, 2014.

4.      P. Wolf, P. Moser, G. Larisch, W. Hofmann, and D. Bimberg, “High-Speed and Temperature-Stable, Oxide-Confined 980-nm VCSELs for Optical Interconnects”, IEEE J. Quantum Electron., Vol. 19,  4,   pp. 1701207, 2013.

5.      A. Nadtochy, W. Hofmann, T. Germann, S. Blokhin, L. Karachinskiy, M. Maximov, V. Shchukin, A. Zhukov, D. Bimberg, “High-frequency electrical properties of a vertical-cavity surface-emitting laser with a  monolithically integrated electro-optical modulator”, Semiconductors., Vol. 47,   No. 5,   pp. 695-700,  2013.

6.      W. Hofmann, and D. Bimberg, “VCSEL-Based Light Sources—Scalability Challenges for VCSEL-Based Multi-100-Gb/s Systems”, IEEE Photon. J., Vol. 4   No. 5,   pp. 1831-1843,   doi: 10.1109/ JPHOT. 2012. 2218588, 2012.

7.      Wei Li, Li Xian Wang, W. Hofmann, Ning Hua Zhu, and D. Bimberg, "Generation of ultra-wideband triplet pulses based on four-wave mixing and phase-to-intensity modulation conversion", Optics Express, Vol. 20, Issue 18, pp. 20222-20227, doi: 10.1364/OE.20.020222, 2012.

8.      W. Hofmann, P. Moser, and D. Bimberg, “Energy-Efficient VCSELs for Interconnects”, IEEE Photon. J., Breakthroughs in Photonics 2011, invited, Vol. 4   No. 2,   pp. 652-656,   doi: 10.1109/JPHOT.2012.2190500, 2012.

9.      P. Wolf, P. Moser, G. Larisch, M. Kroh, A. Mutig, W. Unrau, W. Hofmann and D. Bimberg, “High-performance 980 nm VCSELs for 12.5 Gbit/s data transmission at 155°C and 49 Gbit/s at -14°C,” Electron. Lett., Vol. 48, No. 7, pp. 389-390, doi: 10.1049/el.2012.0225, 2012. {27}

10.   M. Müller, P. Wolf, C. Grasse, M. Dias, M. Ortsiefer, G. Böhm, E. Wong, W. Hofmann, D. Bimberg, and M.-C. Amann, “1.3µm short-cavity VCSELs enabling error-free transmission at 25 Gbit/s over 25 km fibre link,” Electron. Lett., Vol. 48, No. 23, pp. 1487-1489, doi: 10.1049/el.2012.3355, 2012.

11.   P. Moser, J. Lott, P. Wolf, G. Larisch, A. Payusov, N. Ledentsov, W. Hofmann, and D. Bimberg, “99 fJ/(bit·km) Energy to Data-Distance Ratio at 17 Gb/s across 1 km of Multimode Optical Fiber with 850 nm Single Mode VCSELs,”  IEEE Photon. Technol. Lett., doi: 10.1109/LPT.2011.217193, vol.24, no.1, pp.19-21, 2012. {30}

12.   P. Moser, P. Wolf, A. Mutig, G. Larisch, W. Unrau, W. Hofmann, and D. Bimberg, „85 °C error-free operation at 38 Gb/s of oxide-confined 980-nm vertical-cavity surface-emitting lasers,“ Appl. Phys. Lett. 100, 081103, 10.1063/1.3688040, 2012. {37}

13.   T. Germann, W. Hofmann, A. Nadtochiy, J.-H. Schulze, A. Mutig, A. Strittmatter, and D. Bimberg, "Electro-Optical Resonance Modulation of Vertical-Cavity Surface-Emitting Lasers", Optics Express, Vol. 20, Issue 5, pp. 5099-5107, doi: 10.1364/OE.20.005099, 2012. {26}

14.   P. Moser, W. Hofmann, P. Wolf, J. Lott, G. Larisch, A. Payusov, N. Ledentsov, and D. Bimberg, "81 fJ/bit energy-to-data ratio of 850 nm vertical-cavity surface-emitting lasers for optical interconnects", Appl. Phys. Lett.,.98, 231106, Jun. 2011. {86}

15.   W. Hofmann, M. Müller, P. Wolf, A. Mutig, T. Gründl, G. Böhm, D. Bimberg, and M.-C. Amann, "40 Gbit/s modulation of 1550 nm VCSEL", Electron. Lett., 47, 270-271, Feb. 2011. {62}

16.   M. Müller, W. Hofmann, T. Gründl, M. Horn, P. Wolf, R. Nagel, E. Rönneberg, G. Bohm, D. Bimberg, and M.-C. Amann, "1550-nm High-Speed Short-Cavity VCSELs", Sel. Top. in Quantum Electron.,
doi: 10.1109/JSTQE.2011.2109700, vol.17, no.5, pp.1158-1166, 2011. {71}

17.   A. Mutig, J. Lott, S. Blokhin, P. Moser, P. Wolf, W. Hofmann, A. Nadtochiy, and D. Bimberg, "Modulation Characteristics of High-Speed and High-Temperature Stable 980 nm Range VCSELs Operating Error Free at 25 Gbit/s up to 85°C", Sel. Top. in Quantum Electron., vol.17, no.6, pp.1568-1575, 2011.

18.   W. Hofmann: "Evolution of high-speed long-wavelength vertical-cavity surface-emitting lasers", Semiconductor Science and Technol., special issue, (invited), 26, 014011, Nov. 2010.

19.   W. Hofmann: "High-Speed Buried Tunnel Junction Vertical-Cavity Surface-Emitting Lasers", IEEE Photon. J., (invited), Vol. 2, No. 5, pp. 802-815, 10.1109/JPHOT.2010.2055554, 2010.

20.   A. Mutig, J. Lott, S. Blokhin, P. Wolf, P. Moser, W. Hofmann, A. Nadtochiy, A. Payusov and D. Bimberg: "Highly temperature-stable modulation characteristics of multi-oxide-aperture high-speed 980 nm vertical cavity surface emitting lasers", Appl. Phys. Lett., 97, 151101, 2010.

21.   C. Chase, Y. Rao, W. Hofmann, and C. Chang-Hasnain: "1550-nm high contrast grating VCSEL", Optics Express, Vol. 18, Issue 15, pp. 15461 - 15466, July 2010. {76}

22.   W. Hofmann, C. Chase, M. Müller, Y. Rao, C. Grasse, G. Böhm, M.-C. Amann, and C. Chang-Hasnain: "Long-Wavelength High-Contrast Grating Vertical-Cavity Surface-Emitting Laser", IEEE Photon. J., Vol.2, No.3, pp. 415 - 422, June 2010. {42}

23.   A. Ng’oma, D. Fortusini, D. Parekh, W. Yang, M. Sauer, S. Benjamin, W. Hofmann, M.-C. Amann, and C. Chang-Hasnain: "Performance of a Multi-Gb/s 60 GHz Radio over Fiber System Employing a Directly Modulated Optically Injection Locked VCSEL", IEEE J. of Lightwave Technol., Vol. 28, No. 16, pp. 2436-2444, Aug. 2010. {41}

24.   N. Zhu, G. Xu, W. Hofmann, W. Chen, G. Böhm, Y. Liu, X. Wang, L. Xie, and M.-C. Amann: "Small-Signal Equivalent-Circuit Model and Characteriza­tion of 1.55-µm Buried Tunnel Junction Vertical-Cavity Surface-Emitting Lasers", IEEE Trans. on Microwave Theory and Techniques, (invited) Vol. 58, 5, pp. 1283 - 1289, May 2010.

25.   C. Chow, L. Xu, C. Yeh, H. Tsang, W. Hofmann, and M.-C. Amann: "40-Gb/s Upstream Transmitters Using Directly Modulated 1.55-µm VCSEL Array for High-Split-Ratio PONs", IEEE Photon. Technol. Lett., Vol. 22, No. 5, pp. 347-349, Mar. 2010.

26.   V. Karagodsky, B. Pesala, C. Chase, W. Hofmann, F. Koyama, and C. Chang-Hasnain: "Monolithically integrated multi-wavelength VCSEL arrays using high-contrast gratings", Optics Express, Vol. 18, 2, pp. 694-699, 2010. {52}

27.   M.-C. Amann, and W. Hofmann: "InP-based long-wavelength VCSELs and VCSEL arrays", IEEE J. of Sel. Top. in Quantum Electron., (invited), Vol. 15, Issue 3 , pp. 861-868, May-June 2009. {55}

28.   W. Hofmann, M. Müller, A. Nadtochiy, C. Meltzer, A. Mutig, G. Böhm, J. Rosskopf, D. Bimberg, M.-C. Amann, and C. Chang-Hasnain: "22-Gb/s Long Wavelength VCSELs", Optics Express, Vol. 17, Issue 20, pp. 17547-17554, Sept. 2009. {36}

29.   B. Zhang, X. Zhao, D. Parekh, Y. Yue, W. Hofmann, M.‑C. Amann, C. Chang-Hasnain, and A. Willner: "Reconfigurable Multifunctional Operation Using Optical Injection-Locked Vertical-Cavity Surface-Emitting Lasers", IEEE J. of Lightwave Technol., Vol. 27, Issue 15, pp. 2958-2963, August 2009.

30.   X. Zhao, D. Parekh, B. Zhang, L. Christen, A. Willner, W. Hofmann, M.‑C. Amann, F. Koyama, and C. Chang-Hasnain: "Greatly increased fiber transmission distance with an optically injection-locked vertical-cavity surface-emitting laser", Optics Express, Vol. 17, Issue 16, pp. 13785-13791, July 2009. {26}

31.   M. Müller, W. Hofmann, G. Böhm, and M.-C. Amann: "Short-Cavity Long-Wavelength VCSELs with Modulation-Bandwidth in Excess of 15 GHz", IEEE Photon. Technol. Lett., Vol. 21, No. 21, pp. 1615-1617, Nov. 2009. {27}

32.   W. Hofmann, L. Grüner-Nielsen, E. Rönneberg, G. Böhm, M. Ortsiefer, and M.‑C. Amann: "1.55-µm VCSEL Modulation Performance with Dispersion-Compensating Fibers", IEEE Photon. Technol. Lett., Vol. 21, Issue 15,  pp. 1072 – 1074, July 2009.

33.   W. Hofmann, M. Müller, G. Böhm, M. Ortsiefer, and M.-C. Amann: "1.55 µm VCSEL with Enhanced Modulation Bandwidth and Temperature Range", IEEE Photon. Technol. Lett., Vol. 21, Issue 13, pp. 923-925, July 2009.

34.   M.-C. Amann and W. Hofmann: "Single-mode and tunable VCSELs in the near to mid-infrared", Chinese Optics Lett., focus issue on Nano Optics, (invited), Vol. 06, Issue 10 , pp. 743-747, Oct. 2008.

35.   W. Hofmann and M.-C. Amann: "Long-wavelength VCSELs for high-speed applications and gas sensing", IET Optoelectron., (invited), Vol. 2, No. 3, pp. 134–142, June 2008.

36.   D. Parekh, X. Zhao, W. Hofmann, M.-C. Amann, L. A. Zenteno and C. J. Chang-Hasnain: "Greatly Enhanced Modulation Response of Injection-Locked Multimode VCSELs", Optics Express, 16, 26, pp. 21582-21586, 2008. {26}

37.   M. Ortsiefer, W. Hofmann, E. Rönneberg, A. Boletti, A. Gatto, P. Boffi, J. Rosskopf, R. Shau, C. Neumeyr, G. Böhm, M. Martinelli, and M.-C. Amann: "High speed 1.3 µm VCSELs for 12.5 Gbit/s optical interconnects", Electron. Lett., Vol. 44, pp. 974 – 975, July 2008.

38.   S. T. Fard, W. Hofmann, P. T. Fard, G. Böhm, M. Ortsiefer, E. Kwok, M.-C. Amann, and L. Chrostowski: "Optical Absorption Glucose Measurements Using 2.3-µm Vertical-Cavity Semiconductor Lasers", IEEE Photon. Technol. Lett., Vol. 20, No. 11, pp. 930-932, June 2008.

39.   Qing Gu, Werner Hofmann, Markus-Christian Amann, and Lukas Chrostowski: "Optically Injection-Locked VCSEL as a Duplex Transmitter/Receiver", IEEE Photon. Technol. Lett., Vol. 20, No. 7, pp. 463-465, Apr. 2008.

40.   W. Hofmann, E. Wong, G. Böhm, M. Ortsiefer, N. H. Zhu, and M.‑C. Amann: "1.55‑µm VCSEL Arrays for High-Bandwidth WDM-PONs", IEEE Photon. Technol. Lett., Vol. 20, No. 4, pp. 291-293, Feb. 2008. {49}

41.   X. Zhao, D. Parekh, E. Lau, H.-K. Sung, M. C. Wu, W. Hofmann, M.-C. Amann, and C. J. Chang-Hasnain: "Novel cascaded injection-locked 1.55-µm VCSELs with 66 GHz modulation bandwidth", Optics Express, Vol. 15, Issue 22, pp. 14810-14816, Oct. 2007. {58}

42.   L. Chrostowski, B. Faraji, W. Hofmann, M.-C. Amann, S. Wieczorek, and W. W. Chow: "40 GHz Bandwidth and 64 GHz Resonance Frequency in Injection-Locked 1.55 µm VCSELs", IEEE J. of Sel. Top. in Quantum Electron., Vol. 13, Issue 5, Part 1, pp. 1200-1208, Sept.-Oct. 2007. {76}

43.   W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, and M.-C. Amann: "Long-Wavelength (λ = 1.55 μm) monolithic VCSEL array with >3 W CW output power", Electron. Lett., Vol. 43, pp. 1025-1026, Sept. 2007.

44.   E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.-C. Amann: "Rayleigh backscattering and extinction ratio study of optically injection-locked 1.55 µm VCSELs", Electron. Lett., Vol. 43, Issue 3, pp. 182-183, Feb. 2007.

45.   E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.-C. Amann: "Optically Injection-Locked 1.55-µm VCSELs as Upstream Transmitters in WDM-PONs", IEEE Photon. Technol. Lett., Vol. 18, 22, pp. 2371-2373, 2006. {35}

46.   W. Hofmann, N. H. Zhu, M. Ortsiefer, G. Böhm, Y. Liu and M. C. Amann: "High speed (> 11 GHz) modulation of BCB-passivated 1.55 µm InGaAlAs-InP VCSELs", Electron. Lett., Vol. 42, Issue 17, pp. 976-978, Aug. 2006. {53}

47.   X. Zhao, C. J. Chang-Hasnain, W. Hofmann, M.-C. Amann: "Novel modulated-master injection-locked 1.55-µm VCSELs ", Optics Express, Vol. 14, pp. 10500-10507, 2006. {29}

48.   G. Xu, W. Hofmann, H. Huang, T. Zhang, L. Xie, N. H. Zhu, and M.-C. Amann: "Small Signal Equivalent Circuit Model of Buried Tunnel Junction VCSEL Chips", Chinese J. of Semiconductors, Vol. 27, 11, pp. 2015-2018, 2006.

49.   W. Hofmann, N. H. Zhu, M. Ortsiefer, G. Böhm, J. Rosskopf, L. Chao, S. Zhang, M. Maute, and M.-C. Amann: "10-Gb/s Data Transmission Using BCB Passivated 1.55-µm InGaAlAs-InP VCSELs", IEEE Photon. Technol. Lett., Vol. 18, pp. 424-426, 2006. {30}

50.   C. Lauer, M. Maute, W. Hofmann, and M.-C. Amann: "VCSELs emerge as low-cost alternatives to edge-emitters", (invited), Laser Focus World, Vol. 41, 127-131, 2005.

51.   M. Ortsiefer, S. Baydar, K. Windhorn, G. Böhm, J. Rosskopf, R. Shau, E. Rönneberg, W. Hofmann, and M.-C. Amann: "2.5 mW Single-Mode Operation of 1.55 µm Buried Tunnel Junction VCSELs", IEEE Photon. Technol. Lett., Vol. 17, pp. 1596-1598, 2005. {47}

52.   M. Ortsiefer, M. Fürfanger, J. Rosskopf, G. Böhm, F. Köhler, C. Lauer, M. Maute. W. Hofmann, and M.-C. Amann:  "Singlemode 1.55 µm VCSELs with low threshold and high output power", Electron. Lett., Vol. 39, Issue 24, pp. 1731-1732, Nov. 2003. {29}

 

 

Publications in Conference Proceedings (co-) authored by Werner Hofmann

 

  1. Werner Hofmann: „Next-generation-VCSELs as an enabling technology for green access networks and data centers“, 9772-6, (Invited Talk), SPIE Photonics West 2016, San Francisco, California, United States, 2016.
  2. Werner Hofmann: „Multi-Mode Rate-Equation Analysis of VCSELs with >30GHz Bandwidth“, 9757-8, (Invited Talk), SPIE Photonics West 2016, San Francisco, California, United States, 2016.
  1. Werner Hofmann: „Nanophotonics and VCSEL arrays for optical interconnects“, 9368-6, (Invited Talk), SPIE Photonics West 2015, San Francisco, California, United States, 2015.
  2. Werner Hofmann: „High-speed high-contrast grating VCSELs“, 9372-4, (Invited Talk), SPIE Photonics West 2015, San Francisco, California, United States, 2015.
  3. Wissam Hamad and Werner Hofmann: “Advances in high-speed nanostructured VCSELs”, (Invited Talk), BIT’S 4th Annual World Congress of Advanced Materials 2015, Chongqing, China, 2015.
  4. Werner H. E. Hofmann: “Nanostructured VCSELs for Optical Interconnects”, (Invited Talk), O3, CMOS Emerging Technologies Research 2015, Vancouver, Canada, 2015.
  5. Werner Hofmann: “980-nm VCSELs with >30GHz bandwidth”, European VCSEL Day 2015, Lodz, Poland, 2015.
  6. Werner Hofmann: “VCSELs: A ’green’ solution for emitters in high speed interconnects” (invited tutorial), Prophet Workshop 2014, Berlin, Germany, 2014.
  7. Werner Hofmann: “Advanced VCSEL structures”, (invited tutorial), International Nano-Optoelectronics Workshop iNOW 2014, Luga&Saint Petersburg, Russia, 2014.
  8. Werner H. E. Hofmann: “VCSEL Technologies and their Applications from Access Networks to Terabit Interconnects”, Invited Presentation, Session: MO1D: VCSEL Technologies and Applications, Invited Talk, OECC - ACOFT 2014, Melbourne, Australia, 2014.
  9. Anjin Liu, Werner Hofmann, and Dieter Bimberg:”VCSELs with surface nanostructures”, (invited) ATh2B4, Asia Communications and Photonics Conference (ACP) 2014, Hong Kong, 2014.
  10. Werner H. E. Hofmann: “VCSELs: Enabling Technologies from Access to Terabit Interconnects”, 9267-4, Invited Talk, SPIE Photonics Asia 2014, Beijing, China, 2014
  11. Werner Hofmann, Liu Anjin, Dieter Bimberg: “Finite High-Contrast Gratings for VCSELs”, European VCSEL Day 2014, Rennes, France, 2014

14.   P. Wolf, P. Moser, G. Larisch, W. Hofmann, H. Li, J. Lott, C.-Y. Lu, S. Chuang, D. Bimberg, (invited) “Energy-Efficient and Temperature-Stable High-Speed VCSELs for Optical Interconnects,” ITCON 2013, Mo.B2.4, Spain, 2013.

  1. Werner Hofmann: “VCSEL Based Light Sources for Supercomputing”, Session D1 Silicon Photonics, CMOS Emerging Technologies Research, Whistler, Canada, Invited Talk, 2013.
  2. Werner Hofmann: “Nanostructures in VCSEL arrays and their scalability for Terabit optical interconnects” International Nano-Optoelectronics Workshop iNOW 2013, Cargese, France, invited tutorial, 2013.

17.   P. Debernardi, R. Orta, W. Hofmann, (invited) “Rigorous, highly-efficient optical tools for HCG-VCSEL design,” SPIE Photonics West 2013, 8633-10, San-Francisco, USA, 2013.

18.   W. Hofmann, (invited) “Scalability of VCSEL arrays for Ultra-dense Chip-to-chip Optical Interconnects,” Proc. CLEO-PR & OECC/PS 2013, SWB2-2, Kyoto, Japan, 2013.

19.   W. Hofmann, (invited) “High-Density VCSEL Arrays: Workhorse for Optical Interconnects on Silicon?,” J1 Workshop Optical Interconnects II: Challenges and Opportunities for Ultra-Dense Inter-Chip and On-Chip Interconnects, invited tutorial, CLEO-PR & OECC/PS 2013, Kyoto, Japan, reviewed in Nat. Photon. 7, 11, pp. 858, 2013.

  1. Werner Hofmann and Dieter Bimberg: “The application of Nanostructures in Vertical-Cavity Surface-Emitting Lasers”, Nanostructures: Physics and Technology, 21st Int. Symp, , LOED.01i, pp.16-18, Saint Petersburg, Russia, invited, 2013.

21.   P. Debernardi, R. Orta, W. Hofmann, “Performance of 980 nm VCSELs with two types of HCGs,” Proc. European VCSEL Day, Lausanne, Switzerland, 2013.

22.   W. Hofmann, D. Bimberg, “Scalability challenges of VCSEL-based optical interconnects,” Proc. European VCSEL Day, Lausanne, Switzerland, 2013.

23.   P. Debernardi, R. Orta, W. Hofmann, “Comparing the Performance of 980 nm VCSELs with Different High-Contrast-Grating designs,” Proc. CLEO/Europe-IQEC 2013, CB8.3 THU, Munich, Germany, May 2013.

24.   W. Hofmann, P. Wolf, P. Moser, G.  Larisch, W.  Unrau, A.  Mutig, M.  Kroh, and D.  Bimberg: "High-speed temperature-stable 980-nm VCSELs", Proc. of IEEE Int. Semiconductor Laser Conf. (ISLC) 2012, pp. 161-162, San Diego, USA, Nov. 2012.

25.   M. Müller, P. Wolf, T. Gründl, C. Grasse, J. Rosskopf, W. Hofmann, D. Bimberg, and M.-C. Amann: "Energy-efficient 1.3 μm short-cavity VCSELs for 30 Gb/s error-free optical links", Post Deadline Paper, Proc. of IEEE Int. Semiconductor Laser Conf. (ISLC) 2012, pp. 1-2, San Diego, USA, Nov. 2012.

26.   W. Hofmann, P. Moser, P. Wolf, G. Larisch, W. Unrau, D. Bimberg, “980-nm VCSELs for optical interconnects at bandwidths beyond 40 Gb/s”, (invited),  DOI: 10.1117/12.908466, Proc. SPIE, Vol. 8276, 827605, 2012.

27.   P. Moser, P. Wolf, J. Lott, G. Larisch, A. Payussov, A. Mutig, W. Unrau, N. Ledentsov, W. Unrau, W. Hofmann, and D. Bimberg, “High-speed VCSELs for energy efficient computer interconnects”, DOI: 10.1117/12.923054, Proc. SPIE, Vol. 8432, 843202, 2012.

28.   W. Hofmann, P. Moser, P. Wolf, G. Larisch, H. Li, W. Li, J. Lott, D. Bimberg, “VCSELs for exascale computing, computer farms, and green photonics”, (invited),  DOI: 10.1117/12.2006273, Proc. SPIE, Vol. 8552, 855205, 2012.

29.   P. Moser, J. Lott, P. Wolf, G. Larisch, A. Payusov, G. Fiol, N. Ledentsov, W. Hofmann, D. Bimberg, „Energy-efficient vertical-cavity surface-emitting lasers (VCSELs) for "green" data and computer communication,“ Green Photonics Award, doi: 10.1117/12.906856, Proc. SPIE, Vol. 8276, 82760J, 2012.

30.   P. Moser, W. Hofmann, P. Wolf, G. Fiol, J. Lott, N. Ledentsov, and D. Bimberg, „83 fJ/bit energy-to-data ratio of 850-nm VCSEL at 17 Gb/s,“ in 37th European Conference and Exposition on Optical Communications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper Mo.1.LeSaleve.4., Geneva, Switzerland, September 18, 2011.

31.   W. Hofmann, P. Moser, P. Wolf, A. Mutig, M. Kroh, and D. Bimberg, "44 Gb/s VCSEL for optical interconnects" Optical Fiber Communication Conference and Exposition (OFC/NFOEC), Post-Deadline Paper, March 2011.

32.   W. Hofmann, P. Moser, A. Mutig, P. Wolf, W. Unrau, and D. Bimberg, "980-nm VCSELs for optical interconnects at 25 Gb/s up to 120°C and 12.5 Gb/s up to 155°C", Lasers and Electro-Optics (CLEO),  May 2011.

33.   A. Mutig, J. Lott, S. Blokhin, P. Moser, P. Wolf, W. Hofmann, A. Nadtochiy, D. Bimberg, "High speed 980 nm VCSELs for short reach optical interconnects operating error-free at 25 Gbit/s up to 85°C", Lasers and Electro-Optics (CLEO),  May 2011.

34.   A. Mutig, W. Hofmann, S. Blokhin, P. Wolf, P. Moser, A. Nadtochiy, D. Bimberg, and J. Lott, "High speed high temperature stable 980 nm VCSELs operating error-free at 25 Gbit/s up to 85 °C for short reach optical interconnects", Optical Fiber Communication Conference and Exposition (OFC/NFOEC), March 2011. {59}

35.   W. Hofmann: "Long-Wavelength Vertical-Cavity Surface-Emitting Lasers with a High-Contrast Grating", German Physical Society (DPG) annual meeting 2010, DS 2.7 - NanoPhoton. - Devices II, (invited), Regensburg, Germany, Mar. 2010.

36.   W. Hofmann, A. Mutig, Ph. Moser, Ph. Wolf, and D. Bimberg: "Ultrafast 850 nm and 980 nm VCSELs for broadband access and optical interconnects", Proc. of SODC 2010, Berlin, Germany, Oct. 2010.

37.   M. Müller, W. Hofmann, G. Böhm, and M.-C. Amann: "Small-signal analysis of high-temperature stable 1550 nm high-speed VCSELs", Proc. of SODC 2010, Berlin, Germany, Oct. 2010.

38.   M. Müller, W. Hofmann, A. Nadtochiy, A. Mutig, G. Böhm, M. Ortsiefer, D. Bimberg and M.-C. Amann: "1.55 μm High-Speed VCSELs Enabling Error-Free Fiber-Transmission up to 25 Gbit/s", IEEE Int. Semiconductor Laser Conf. 2010, WC 3, Kyoto, Japan, Sept. 2010.

39.   A. Mutig, J. Lott, S. Blokhin, P. Moser, P. Wolf, W. Hofmann, A. Nadtochiy, A. Payusov, and D. Bimberg: "High-speed 980-nm VCSELs for very short reach optical interconnects", IEEE Int. Semiconductor Laser Conf. 2010, WC 4, Kyoto, Japan, Sept. 2010.

40.   M. Müller, W. Hofmann, M. Horn, G. Böhm, and M.-C. Amann: "Low-Parasitics 1.55 μm VCSELs with Modulation Bandwidths beyond 17 GHz", CLEO/QELS 2010, CME-VCSEL I, CME5, San Jose, CA, USA, May 2010.

41.   W. Hofmann, C. Chase, M. Müller, Y. Rao, C. Grasse, G. Böhm, M.-C. Amann, and C. Chang-Hasnain: "Long-Wavelength BTJ-VCSEL with High-Contrast Grating", CLEO/QELS 2010, CMO-VCSEL II, CMO1, San Jose, CA, USA, May 2010.

42.   V. Karagodsky, B. Pesala, C. Chase, W. Hofmann, F. Koyama and C. Chang-Hasnain: "Multi­wavelength High Contrast Grating VCSEL Array With 200nm Spectral Range", CLEO/QELS 2010, CMO-VCSEL II, CMO6, San Jose, CA, USA, May 2010.

43.   D. Parekh, J. Treu, W. Yang, W. Hofmann, and C. Chang-Hasnain: "Robustness of VCSEL-Based WDM-PON Using Orthogonally Polarized Injection,", CLEO/QELS 2010, CThK-Access Networks, CThK2, San Jose, CA, USA, May 2010.

44.   D. Parekh W. Yang, A. Ng´Oma, D. Fortusini, M. Sauer, S. Benjamin, W. Hofmann, M.-C. Amann, and C. Chang-Hasnain: "Multi-Gbps ASK and QPSK-Modulated 60 GHz RoF Link Using an Optically Injection Locked VCSEL", Optical Fiber Communication Conf. (OFC/NFOEC 2010), OTuF5, San Diego, USA, Mar. 2010.

45.   Y. Yue, L. Zhang, J. Wang, Y. Xiao-Li, B. Shamee, V. Karagodsky, F.  Sedgwick, W. Hofmann, R.  Beausoleil, C. Chang-Hasnain, and A. Willner: "A "Linear" High-Contrast Gratings Hollow-Core Waveguide and Its System Level Performance", Optical Fiber Communication Conf. (OFC/ NFOEC 2010), OTuI5, San Diego, USA, Mar. 2010.

46.   W. Hofmann: "High-Speed Buried Tunnel Junction VCSELs with High Operation Temperature", Proc. of IEEE Photon. Society (LEOS) annual meeting 2009, (invited), pp. 803-804, Paper ThX1, Belek-Antalya, Turkey, Oct. 2009.

47.   M. Müller, W. Hofmann, G. Böhm, J. Rosskopf, E. Rönneberg, M. Ortsiefer, and M.-C. Amann: "1.55 μm InP-based Short-Cavity-VCSEL with Enhanced Modulation-Bandwidth of 15 GHz", 35th European Conf. on Optical Commu­ni­ca­tion (ECOC), (invited), Paper 8.2.1, pp. 1-2, Vienna, Austria, September 2009.

48.   S. T. Fard, W. Hofmann, T. Pouria, E. Kwok, M.-C. Amann, and L. Chrostowski: "Optical Glucose Monitoring using Vertical Cavity Surface Emitting Lasers (VCSELs)", SPIE Optics and Photon. Symposium, Bio-Sensing II, (invited), Novel and Bio-inspired Sensors, Proc. of the SPIE, Vol. 7397, pp. 739704-739704-11, San Jose, CA, USA, Aug. 2009.

49.   W. Hofmann: "Long-Wavelength VCSELs with Enhanced Modulation Bandwidth", 14th OptoElectron. and Communications Conference (OECC/ IOOC), Paper WU2, (invited), Hong Kong, July 2009.

50.   P. Guo, W. Yang, D. Parekh, W. Hofmann, M.-C. Amann, and C. Chang-Hasnain: "Anomalous Modulation Characteristics of Optical Injection-locked VCSELs", Asia Communications and Photon. Conf. and Exhibition (ACP 2009), Paper TuD6, Shanghai, China, Nov. 2009.

51.   W. Yang, P. Guo, D. Parekh, W. Hofmann, M.-C. Amann, and C. Chang-Hasnain: "Physical Origin of Data Pattern Inversion in Optical Injection-locked VCSELs", Frontiers in Optics (FiO 2009), Paper FTuW2, San Jose, CA, USA, October 2009.

52.   L. Xu, W. Hofmann, H. K. Tsang, R. V. Penty, I. H. White, and M.-C. Amann: "1.55-µm VCSEL Transmission Performance up to 20 Gb/s for Access Net­works", 14th OptoElectron. and Communications Conference (OECC/ IOOC), (Post-Deadline), ThPD1, pp.1-2, Hong Kong, July 2009.

53.   L. Xu, H. K. Tsang, W. Hofmann, and M.-C. Amann: "10-Gb/s Colorless Re-modulation of Signal from 1550nm Vertical Cavity Surface Emitting Laser Array in WDM PON", CLEO/Europe-EQEC Conference, Topic CI, Munich, Germany, June 2009.

54.   W. Hofmann, M. Müller, G. Böhm, J. Rosskopf, and M.-C. Amann: "Long-Wavelength BTJ-VCSELs with Improved Modulation Bandwidth and Temperature Range", CLEO/QELS 2009, CMGG-VCSELs I, CMGG5, Baltimore, MD, USA, June 2009.

55.   W. Hofmann, M. Görblich, G. Böhm, M. Ortsiefer, and M.-C. Amann: "Long-Wavelength VCSEL Arrays with Partly Coherent Emission", CLEO/QELS 2009, CMSS-VCSELs II, CMSS3, Baltimore, MD, USA, June 2009.

56.   W. Hofmann, N. H. Zhu, M. Görblich, L. Xie, G. Böhm, M. Ortsiefer, and M.-C. Amann: "1.55-µm VCSEL Arrays for Optical Multiple-Input Multiple-Output (MIMO)", CLEO/QELS 2009, Poster Session I, JTuD17, Baltimore, MD, USA, June 2009.

57.   B. Zhang, X. Zhao, D. Parekh, Y. Yue, W. Hofmann, M.-C. Amann, C. Chang-Hasnain, and A. Willner: "Multifunctional and reconfigurable 10-GHz operation of an optical injection-locked VCSEL", CLEO/QELS 2009, CTuJ PON and Light Sources, CTuJ7, Baltimore, MD, USA, June 2009.

58.   W. Hofmann, M. Müller, G. Böhm, M. Ortsiefer, and M.-C. Amann: "1.55 µm InP-Based VCSEL with Enhanced Modulation Bandwidths > 10 GHz up to 85°C", OFC/NFOEC, OTuK5, San Diego, USA, Mar. 2009.

59.   D. Parekh, B. Zhang, X. Zhao, Y. Yue, W. Hofmann, M.-C. Amann, A. E. Willner, and C. J. Chang-Hasnain: "90-km Single-Mode Fiber Transmission of 10-Gb/s Multimode VCSELs under Optical Injection Locking", OFC/ NFOEC, OTuK7, San Diego, USA, Mar. 2009.

60.   D. Parekh, W. Yang, W. Hofmann, M.-C. Amann, and C. J. Chang-Hasnain: "Isolator-Less Optically Injection-Locked 1.55-μm VCSELs for Upstream Transmitters in WDM-PONs", OFC/NFOEC, OThA4, San Diego, USA, Mar. 2009.

61.   L. Chrostowski, Q. Gu, W. Hofmann, and M.-C. Amann: "High-Speed Bi-Directional Communication using Optically Injection-Locked Semi­conductor Lasers", IEEE 19th Annual Workshop on Interconnections within High Speed Digital Systems, (invited), MA3, Santa Fe (NM), USA, May 2008.

62.   D. Parekh, X. Zhao, W. Hofmann, M.-C. Amann, and C. J. Chang-Hasnain: "Systematic Study on Locking Stability and Frequency Response of Injection-Locked Multimode VCSELs", 21th Annual Lasers and Electro Optics Society Meeting, TuW4, Newport Beach, CA, USA, Nov. 2008.

63.   W. Hofmann, M. Ortsiefer, E. Rönneberg, C. Neumeyr, G. Böhm, and M.-C. Amann: "1.3 µm InGaAlAs/InP VCSEL for 10G Ethernet", IEEE Int. Semicond. Laser Conf. 2008, MB 3, pp. 11-12, Sorrento, Italy, 2008.

64.   W. Hofmann, E. Wong, M. Ortsiefer, M. Görblich, G. Böhm, and M.-C. Amann: "One and Two-dimensional Long-Wavelength VCSEL arrays for WDM Applications and Optical Interconnects", IEEE Int. Semiconductor Laser Conf. 2008, ThA 4, pp. 165-166, Sorrento, Italy, Sept. 2008.

65.   W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, and M.-C. Amann: "High-Power Long-Wavelength VCSEL Arrays", IEEE Int. Semiconductor Laser Conf. 2008, WA 6, pp. 141-142, Sorrento, Italy, Sept. 2008.

66.   M. Ortsiefer, J. Rosskopf, E. Rönneberg, Y. Xu, K. Maisberger, R. Shau, C. Neumeyr, W. Hofmann, G. Böhm, A. Hangauer, J. Chen, R. Strzoda, and M.-C. Amann: "Extended Near-Infrared Wavelength VCSELs for Optical Sensing", IEEE Int. Semiconductor Laser Conf. 2008, ThA 5, pp. 167-168, Sorrento, Italy, 2008.

67.   W. Hofmann, N.-H. Zhu, G. Böhm, M. Ortsiefer, L. Xie, L. Yu, and M.-C. Amann: "Optical MIMO with VCSEL arrays", 2008 IEEE/LEOS Semiconductor Laser Workshop, Santa Fe, USA, May 2008.

68.   D. Parekh, X. Zhao, W.r Hofmann, M.-C. Amann, L. A. Zenteno, and C. J. Chang-Hasnain: "54 GHz Multimode VCSELs by Optical Injection Locking", CLEO/QELS 2008, (post-deadline), CPDB1, San Jose, USA, May 2008.

69.   X. Zhao, E. K. Lau, D. Parekh, H.-K. Sung, W. Hofmann, M.-C. Amann, M. C. Wu, and C. J. Chang-Hasnain: "107-GHz Resonance Frequency of 1.55-μm VCSELs under Ultra-High Optical Injection Locking", CLEO/QELS 2008, CMW4, San Jose, USA, May 2008.

70.   X. Zhao, B. Zhang, L. Christen, D. Parekh, F. Koyama, W. Hofmann, M.-C. Amann, A. E. Willner, and C. J. Chang-Hasnain: "Data Inversion and Adjustable Chirp in 10-Gbps Directly-Modulated Injection-Locked 1.55-μm VCSELs ", CLEO/QELS 2008, CMW5, San Jose, USA, May 2008.

71.   Q. Gu, W. Hofmann, M.-C. Amann, and L. Chrostowski: "Optically Injection-Locked VCSEL for Bi-Directional Optical Communication", CLEO/QELS 2008, CMW6, San Jose, USA, May 2008.

72.   W. Hofmann, M. Görblich, G. Böhm, M. Ortsiefer, L. Xie, M.-C. Amann: "Long-Wavelength 2-D VCSEL Arrays for Optical Interconnects", CLEO/QELS 2008, CMW7, San Jose, USA, May 2008.

73.   B. Zhang, X. Zhao, L. Christen, D. Parekh, W. Hofmann, M. C. Wu, M.-C. Amann, C. J. Chang-Hasnain, and A. E. Willner: "Adjustable Chirp Injection-Locked 1.55-μm VCSELs for Enhanced Chromatic Dispersion Compensation at 10-Gbit/s", OFC/NFOEC, OWT7, San Diego, USA, Mar. 2008.

74.   W. Hofmann, G. Böhm, M. Ortsiefer, and M.-C. Amann: "Long-wavelength VCSELs and VCSEL Arrays for High-Speed, High-Power and High Sensitivity", Proc. of III. Int. Conf. on Laser Processes and Comp. (LPC 2008), Shanghai, P.R. China, pp. 33-34, Mar. 2008.

75.   W. Hofmann, G. Böhm, M. Ortsiefer, M. Görblich, C. Lauer, N. H. Zhu, and M.-C. Amann: "Long-wavelength VCSELs for optical networks and trace-gas monitoring", Proc. SPIE Optics East 2007, (invited), Baltimore, USA, Vol. 6766, 67660F, pp. 1-13, Sept. 2007.

76.   M.-C. Amann and W. Hofmann: "High-Speed 1.55 µm VCSELs", Proc. of OECC/IOOC 2007, (invited), 12D4-1, Yokohama Kanagawa, Japan, July 2007.

77.   W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, and M.-C. Amann: "Monolithic 2D high-power arrays of long-wavelength VCSELs ", SPIE Photon. West, San Jose, USA, Vol. 6908, 6908-06, pp. 1-7, Jan. 2008

78.   B. Faraji, L. Chrostowski, W. Hofmann, and M.-C. Amann: "Dual-Resonance Frequency Response in Injection-Locked 1.55 µm VCSELs", OFC/NFOEC 2007, pp. 1-3, Anaheim, USA, March 2007.

79.   X. Zhao, D. Parekh, E. Lau, H.-K. Sung, M. C. Wu, C. J. Chang-Hasnain, W. Hofmann, and M.-C. Amann: "High-Speed Laser Transmitters Using Cascaded Optical Injection Locking", Nano-OptoElectron. Workshop, i-NOW '07, pp. 196-197, Beijing, China, July – Aug. 2007.

80.   Q. Gu, K. W. Chan, A. Au, Be. Faraji, L. Chrostowski W. Hofmann, and M.-C. Amann: "Optical Injection Locking of VCSEL with Amplitude Modulated Master", IEEE Int. Top. Meeting on Microwave Photon., Best Student Poster Award, pp. 183-186, Victoria, Canada, Oct. 2007.

81.   W. Hofmann, E. Wong, G. Böhm, M. Ortsiefer, and M.-C. Amann: "1 x 12 VCSEL Array at 1.55 µm for High-Bandwidth at Metro-Range", Proc. of ECOC 2007, Vol. 3, pp. 211-212, Berlin, Germany, Sept. 2007.

82.   W. Hofmann, M. Görblich, M. Ortsiefer, G. Böhm, and M. C. Amann: "Long-wavelength high-power VCSEL arrays", European Semiconductor Laser Workshop (ESLW), Berlin, Sept. 2007.

83.   E. Wong, W. Hofmann, and M.-C. Amann: "Future-Proof WDM-PONs with Bandwidth/Wavelength Upgradeable VCSEL arrays", Proc. of ECOC 2007, Vol. 5, pp. 277-278, Berlin, Germany, Sept. 2007.

84.   W. Hofmann, M. Görblich, G. Böhm, M. Ortsiefer, H. Mulatz, and M.-C. Amann: "High-Power 1.55 µm VCSEL Arrays", CLEO Europe/IQEC 2007, CB4-2-TUE pp.1, Munich, Germany, June 2007.

85.   W. Hofmann, G. Böhm, M. Ortsiefer, and M.-C. Amann: "Scaling Rules for High-Power 1.55 µm VCSEL Arrays", CLEO/QELS 2007, CTuGG3, Baltimore, USA, May 2007.

86.   W. Hofmann, G. Böhm, M. Ortsiefer, E. Wong, and M. C. Amann: "Uncooled High speed (> 11 GHz) 1.55 µm VCSELs for CWDM access networks", Proc. of ECOC 2006, (post-deadline), Vol. 6, pp.59-60, Cannes, France, Sept. 2006.

87.   X. Zhao, Y. Zhou, C. J. Chang-Hasnain, W. Hofmann, M.-C. Amann: "Novel Modulated-Master Injection-Locked 1.55 µm VCSELs", Nano-Optoelectronic Workshop and BaCaTeC Summer School in Advances of Photon., Best Poster Award, Berkeley, USA, Aug. 2006.

88.   E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.-C. Amann: "Optically Injection-Locked 1.55 µm VCSELs as Upstream Transmitters in WDM Passive Optical Networks", Nano-Optoelectronic Workshop and BaCaTeC Summer School in Advances of Photon., Best Poster Award, Berkeley,. 2006.

89.   W. Hofmann and M. C. Amann: "BCB-passivated 1.55 µm VCSELs for High Speed  Applications", Nano-Optoelectronic Workshop and BaCaTeC Summer School in Advances of Photon., Best Poster Award, Berkeley, USA, Aug. 2006.

90.   W. Hofmann, N. H. Zhu, M. Ortsiefer, G. Böhm, Y. Liu, G. Z. Xu, and M.-C. Amann: "High speed modulation of BCB-passivated 1.55 µm VCSELs", Proc. of SODC 2006, pp. 119-121, Duisburg, 2006.

91.   M. Ortsiefer, M. Grau, J. Rosskopf, R. Shau, K. Windhorn, and E. Rönneberg, G. Böhm, W. Hofmann, O. Dier, and M.-C. Amann: "InP-based VCSELs with buried tunnel junction for optical communication and sensing in the 1.3-2.3 µm wavelength range", Proc. of IEEE Int. Semiconductor Laser Conf. (ISLC) 2006, pp. 113-114, Waikoloa, USA, July 2006.

92.   L. Chrostowski, B. Faraji, W. Hofmann, R. Shau, M. Ortsiefer, and M.-C. Amann: "40 GHz Bandwidth and 64 GHz Resonance Frequency in Injection-Locked 1.55 µm VCSELs", Proc. of IEEE Int. Semiconductor Laser Conf. (ISLC) 2006, pp. 117-118, Waikoloa, USA, July 2006.

93.   X. Zhao, C. J. Chang-Hasnain, W. Hofmann, M. C. Amann: "Modulation Efficiency Enhancement of 1.55-µm Injection-Locked VCSELs", Proc. of IEEE Int. Semiconductor Laser Conf. (ISLC) 2006, pp.125-126, Waikoloa, USA, July 2006.

94.   E. Wong, X. Zhao, C. J. Chang-Hasnain, W. Hofmann, and M.-C. Amann: "Uncooled, Optical Injection-Locked 1.55 µm VCSELs for Upstream Transmitters in WDM-PONs", Proc. of OFC/NFOEC 2006, (post-deadline), PDP 50, pp. 1-3, Anaheim, USA, March 2006.

95.   X. Zhao, Y. Zhou, C. J. Chang-Hasnain, W. Hofmann, M.-C. Amann: "Slow and Fast Light Using Master-Modulated Injection-Locked VCSELs", Proc. of CLEO/QELS 2006, VCSEL I, CWG 5, Long Beach, USA, May 2006.

96.   W. Hofmann, N. H. Zhu, M. Ortsiefer, R. Shau, J. Rosskopf, G. Böhm, C. Quian, F. Köhler, M. Maute, C. Lauer, and M.-C. Amann: "High-speed vertical-cavity laser diodes at 1.55µm", Proc. of SODC 2004, pp. 5-6, Wuhan, P. R. China, March 2004.

 

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