Freedom Photonics offers design, micro and nano fabrication and testing in support of your research and development needs. We have extensive prototyping capabilities, enabled by our vast experience and access to the state-of-the-art National Nanotechnology Infrastructure Network (NNIN) facilities.

Dr. Jonathon S. Barton

Dr. Barton leads the research and development efforts of Freedom Photonics related to the development of novel coherent and digital communications integrated optical transmitters and transceivers in Indium Phosphide. He is actively involved in the photonic chip design, pilot production and prototype development. He serves as a Principal Investigator for numerous SBIR programs as well as one STTR program.

Dr. Barton has 12 years of experience in working with integrated photonics, spanning over modeling, design, fabrication, testing and packaging of photonic integrated circuits.

Prior to co-founding Freedom Photonics LLC in January 2005, Dr. Barton worked for Agility Communications Inc., a start-up company recently acquired by JDSU Inc., which pioneered monolithically integrated widely-tunable SGDBR based lasers and transmitters. Dr. Barton performed a number of duties at Agility, including device modeling and design, fabrication process development, anti-reflection coating process development and device packaging and testing.

During the time spent at UCSB, Dr. Barton has designed and developed the world’s first C-band tunable monolithically integrated Mach-Zehnder transmitter in Indium Phosphide and photocurrent driven wavelength converters, operating at 40 Gbps. He served as assistant Project Scientist at the University of California, Santa Barbara, where he was responsible for a $500,000 program on monolithically integrated indium-phosphide chips for all-optical signal regeneration (3R), funded through DARPA’s Chip-Scale WDM program. Prior to his work at UCSB, in 1998, Dr. Barton worked at Sandia National Laboratories on the reliability testing of radiation-hardened VCSELs.

Dr. Barton has co-authored over seventy five papers on tunable lasers and photonic integrated circuits, and has given numerous invited and contributed talks at various international conferences. Dr. Barton has extensive experience with modeling, design, fabrication, testing and packaging of photonic integrated circuits.

• Johansson, L.A.; Masanovic, M.L.; Barton, J.S.,”Correlation based Approach to Fiber Reflectometry using Commercial Off-the-Shelf Components” Avionics Fiber-Optics and Photonics, 2006. IEEE Conference 12-14 Sept., 2006 Page(s):36 – 37
• Raburn, M.; Takenaka, M.; Takeda, K.; Xueliang Song; Barton, J.S.; Nakano, Y.” Fabrication of InP/InGaAsP Multi-Mode Interference Distributed Bragg Reflector Laser All-Optical Flip-Flops” Indium Phosphide and Related Materials Conference Proceedings, 2006 International Conference on,7-11 May 2006 Page(s):56 – 59
• Koji Takeda, Mitsura Takenaka, Maura Raburn, Xueliang Song, Jonathon S. Barton, Yoshiaki Nakano, “All-Optical 10-Gbps Packet Switching by DBR-MMI-BLD All-Optical Flip-Flop, “Semiconductor Laser Conference, 2006. Conference Digest. 2006 IEEE 20th International, Sept. 17-21, 2006.
• Tauke-Pedretti, A.; Sysak, M.N.; Barton, J.S.; Raring, J.W.; Johansson, L.; Coldren, L.A “40-Gb/s Series-Push-Pull Mach–Zehnder Transmitter on a Dual-Quantum-Well Integration Platform”, Photonics Technology Letters, IEEE Volume 18, Issue 18, Sept 15, 2006 Page(s):1922 – 1924
• Sysak, M.N.; Raring, J.W.; Barton, J.S.; Dummer, M.; Blumenthal, D.J.; Coldren, L.A. ”A single regrowth integration platform for photonic circuits incorporating tunable SGDBR lasers and quantum-well EAMs”, Photonics Technology Letters, IEEE, Volume 18, Issue 15, Aug. 2006 Page(s):1630 – 1632
• Raburn, M.; Takenaka, M.; Takeda, K.; Xueliang Song; Barton, J.S.; Nakano, Y., ”Integrable multimode interference distributed Bragg reflector laser all-optical flip-flops”,Photonics Technology Letters, IEEE, Volume 18, Issue 13, July 2006, Pgs:1421 – 1423
• Raring, J.W.; Skogen, E.J.; Wang, C.S.; Barton, J.S.; Morrison, G.B.; Demiguel, S.; DenBaars, S.P.; Coldren, L.A.,”Design and demonstration of novel QW intermixing scheme for the integration of UTC-type photodiodes with QW-based components” Quantum Electronics, IEEE Journal of, Volume 42, Issue 2, Feb. 2006 Page(s):171 – 181
• J.W. Raring, M.N. Sysak, A. Tauke-Pedretti, M.M. Dummer, E.J. Skogen, J.S. Barton, S.P. DenBaars, and L.A. Coldren, “Advanced Integration Schemes for High–Functionality/High–Performance Photonic Integrated Circuits,” Proc. SPIE, paper no. 6126 -19, San Jose, CA (January 21-26, 2006) INVITED PAPER
• M.N. Sysak, J.W. Raring, J.S. Barton, M.M. Dummer, A. Tauke-Pedretti, H.N. Poulsen, D.J. Blumenthal, and L.A. Coldren, “10 Gb/s Monolithically Integrated, Photocurrent Driven Wavelength Converter with Widely Tunable SGDBR Laser and Optical Receiver,” Proc. Integrated Photonics Research and Applications, paper no. ITuC5, Uncasville, CT (April 24-28, 2006)
• L.A. Coldren, J.W. Raring, J.S. Barton, M.N. Sysak, and L.A. Johansson, “Improved Functionality and Performance in Photonic Integrated Circuits,” Proc. IPRM, paper no. PLE1, Princeton, NJ (May 7-11, 2006) INVITED PLENARY
• M.N. Sysak, J.W. Raring, J.S. Barton, M.M. Dummer, A. Tauke-Pedretti, H.N. Poulsen, D.J. Blumenthal, and L.A. Coldren, “Single-Chip, Widely-Tunable 10 Gbps Photocurrent-Driven Wavelength Converter Incorporating a Monolithically Integrated Laser Transmitter and Optical Receiver,” Electronics Letters, 42, (11), pp. 657-658, (May 25, 2006)
• M.N. Sysak, J.W. Raring, L.A. Johansson, H.N. Poulsen, J.S. Barton, D.J. Blumenthal, and L.A. Coldren, “Optical 2R and 3R Signal Regeneration in Combination with Dynamic Wavelength Switching Using a Monolithically Integrated, Widely Tunable Photocurrent Driven Wavelength Converter,” Proc. European Conference Optical Communication (ECOC), Cannes, France (September 2006) INVITED PAPER
• Barton JS, Tauke-Pedretti A, Dummer M, Sysak MN, Masanovic ML, Raring J, Skogen EJ, Coldren LA. “10 Gb/s wavelength conversion using a widely tunable series push-pull photocurrent-driven transmitter.” IEEE Photonics Technology Letters, vol.17, no.9, Sept. 2005, pp.1902-4.
• M. L. Masanovic, V. Lal, J. S. Barton, E. J. Skogen, J. A. Summers, L. Rau, L. A. Coldren, and D. J. Blumenthal, "Widely-Tunable Monolithically-Integrated All-Optical Wavelength Converters in InP," IEEE Journal of Lightwave Technology, Vol. 23, No. 3, March 2005.
• J. W. Raring, E. J. Skogen, J. S. Barton, C.S. Wang, S. P. DenBaars, and L. A. Coldren, “Quantum well intermixing and MOCVD regrowth for the monolithic integration of 40 Gb/s UTC type photodiodes with QW based components”, Accepted to Electron. Letts.
• Tauke-Pedretti, A.; Dummer, M.; Barton, J.S.; Sysak, M.N.; Raring, J.W.; Coldren, L.A.,”High saturation power and high gain integrated photoreceivers”,Photonics Technology Letters, IEEE Volume 17, Issue 10, Oct. 2005 Page(s):2167 - 2169
• Jonathon S. Barton, Matthew N. Sysak, Anna Tauke-Pedretti, Matthew Dummer, Jonathan Klamkin, Jonathan Getty, Erik J. Skogen, James Raring, Leif A. Johansson, Milan L. Mašanović, Larry A. Coldren, “Widely-tunable photocurrent-driven wavelength converters” SPIE Photonics West 2005 Conf. proc. San Jose Invited.
• J. S. Barton, M. L. Masanovic, A. Tauke-Pedretti, E. J. Skogen, and L. A. Coldren, "Monolithically-integrated 40Gbit/s widely-tunable transmitter using series push-pull Mach-Zehnder modulator SOA and Sampled-Grating DBR laser," presented at Optical Fiber Communication Conference, 2005.
• Anna Tauke-Pedretti, Matthew N. Sysak, Jonathon S. Barton, James W. Raring, Matthew Dummer, and Larry A. Coldren. Monolithic dual-quantum-well 10 gb/s mach-zehnder transmitter. In LEOS 2005 Annual Meeting, Sydney, Australia, October 2005. paper TuBB3
• Sysak M.N., Jonathon S. Barton, James W. Raring, Matthew Dummer, Anna Tauke-Pedretti, Daniel J. Blumenthal, Larry A. Coldren “10 Gb/s Photocurrent Driven, Widely Tunable Electroabsorption Modulator Based Wavelength Converter” OFC 2005
• M. L. Masanovic, V. Lal, E. J. Skogen, J. S. Barton, J. A. Summers, L. A. Coldren, and D. J. Blumenthal, "Detailed Comparison of Cross-phase Modulation Efficiency in Offset Quantum Well and Centered Quantum Well Intermixed Monolithically Integrated Widely-Tunable MZI-SOA Wavelength Converters," presented at Optical Fiber Communication Conference, 2005.
• Masanovic, M.L.; Lal, V.; Skogen, E.J.; Barton, J.S.; Summers, J.A.; Raring, J.A.; Coldren, L.A.; Blumenthal, D.J.”Cross-phase modulation efficiency in offset quantum-well and centered quantum-well semiconductor optical amplifiers” Photonics Technology Letters, IEEE Volume 17, Issue 11, Nov. 2005 Page(s):2364 – 2366
• M. L. Masanovic, J. S. Barton, V. Lal, M. N. Sysak, J. W. Raring, E. J. Skogen, D. J. Blumenthal, and L. A. Coldren, "Integration techniques for InP-based high-functionality photonic integrated circuits," invited paper presented at Integrated Photonics Research and Applications, 2005.
• Milan Mašanović, Jonathon Barton, Vikrant Lal, Joseph Summers, Mathew Sysak, James Raring, Erik Skogen, Anna Tauke-Pedretti, Mathew Dummer, Larry Coldren, Daniel Blumenthal “Tunable Monolithically Integrated Wavelength Converters at 40 Gbps” OIDA Workshop, May 2005.
• Coldren, L.A.; Raring, J.W.; Barton, J.S.; Sysak, M.; Johansson, L.”Widely-tunable transmitters and photonic integrated circuits” Device Research Conference Digest, 2005. DRC '05. 63rd, Volume 1, June 20-22, 2005 Page(s):11 - 14
• Coldren, L.A.; Skogen, E.J.; Raring, J.W.; Barton, J.S.; Lofgreen, D.; Johansson, L.; Getty, J.T.; ”Active photonic integrated circuits”, Indium Phosphide and Related Materials, 2005. International Conference on, 8-12 May 2005 Page(s):160 – 162
• J. W. Raring, E. J. Skogen, L. Johansson, M. N. Sysak, J. S. Barton, M. L. Masanovic, and L. A. Coldren, "Demonstration of Widely-Tunable Single-Chip 10 Gb/s Laser-Modulators Using Multiple-Bandgap InGaAsP Quantum-Well Intermixing," IEEE Photonics Technology Letters, vol. 16, No. 7, 2004.
• Erik J. Skogen, Jonathon S. Barton, James W. Raring, Larry A. Coldren, Steven P. DenBaars, High Contrast InP/InGaAsP Grating MOCVD Regrowth Using TBA and TBP, Journal of Crystal Growth
• L.A. Coldren, G.A. Fish, Y. Akulova, J.S. Barton, L. Johansson, and C.W. Coldren, “Tunable Semiconductor Lasers: A Tutorial” Jour. Lightwave Technology, 22, (1), pp. 193 - 202 (January 2004) INVITED PAPER
• M.L. Masanovic, V. Lal, J.A. Summers, J.S. Barton, E.J. Skogen, L.A. Coldren, D.J. Blumenthal, “Design and Performance of a Monolithically-Integrated Widely-Tunable All-Optical Wavelength Converter with Independent Phase Control” Phot. Tech. Lett., 16, (10), pp. 2299-2301 (October 2004)
• Masanovic M.L., V. Lal, J. S. Barton, E. J. Skogen, J. A. Summers, L. Rau, L. A. Coldren, and D. J. Blumenthal, "Widely-Tunable Monolithically-Integrated All-Optical Wavelength Converters in InP," to be published in IEEE Journal of Lightwave Technology, 2004.
• Hutchinson J.M., J. F. Zheng, J. S. Barton, M. L. Masanovic, M. N. Sysak, J. A. Henness, L. A. Johansson, D. J. Blumenthal, L. A. Coldren, H. V. Demir, V. A. Sabnis, O. Fidaner, J. S. Harris, and D. A. B. Miller, " Indium Phosphide based Wavelength Conversion for High Speed Optical Networks," Intel Technology Journal, 2004.
• Masanovic M.L., E. J. Skogen, J. S. Barton, J. M. Sullivan, D. J. Blumenthal, and L. A. Coldren, "Multimode interference-based two-stage 1 * 2 light splitter for compact photonic integrated circuits," IEEE Photonics Technology Letters, vol. 15, pp. 706-8, 2003.
• Skogen EJ, Raring JW, Barton JS, DenBaars SP, Coldren LA. “Postgrowth control of the quantum-well band edge for the monolithic integration of widely tunable lasers and electroabsorption modulators.” IEEE Journal of Selected Topics in Quantum Electronics, vol.9, no.5, Sept.-Oct. 2003, pp.1183-90.
• J.S. Barton, M.L. Mašanovic , M.N. Sysak, J.M. Hutchinson, E.J. Skogen, D.J. Blumenthal, and L.A. Coldren, “2.5Gbit/s error free wavelength conversion using a monolithically-integrated widely-tunable SGDBR-SOA-MZ transmitter and integrated photodetector” IEEE Photonic Technology Letters, 16, (6), pp 1531-1533, (June 2004)
• M.N Sysak, J.S. Barton, L.A. Johansson, J.W. Raring, E.J. Skogen, M.L. Masanovic, D.J. Blumenthal and L.A. Coldren. “Single-Chip Wavelength Conversion Using a Photocurrent-Driven EAM Integrated With a Widely Tunable Sampled-Grating DBR Laser” IEEE Photon.Technol. Lett., vol. 16, No. 9, pp.2093-2095, Sept. 2004.
• Skogen E.J., J.S. Barton, J.W. Raring, L.A. Coldren, S.P. DenBaars, "High Contrast InP/InGaAsP Grating MOCVD Regrowth Using TBA and TBP", Conference Proceedings from ICMOVPE conference, Hawaii. 2004.
• L. A. Johansson, J. S. Barton, L. A. Coldren, and G. A. Fish, “High-speed optical frequency modulation in a monolithically integrated widely-tunable laser-phase modulator” Proc. OFC 2004, FL2, Los Angeles, CA, (February 22-27, 2004)
• J.M. Hutchinson, J.S. Barton, M.L. Mašanovic, M.N. Sysak, J.A. Henness, L.A. Johansson, D.J. Blumenthal, L.A. Coldren "Monolithically Integrated InP-Based Tunable Wavelength Conversion" Proc.SPIE Photonics West 2004, paper # 5349-25, San Jose, CA (Jan 25, 2004)
• Raring J.W., E. J. Skogen, L. A. Johansson, M. N. Sysak, J. S. Barton, M. L. Masanovic, and L. A. Coldren, "Quantum Well Intermixing for Monolithic Integration: A Demonstration of Novel Widely-Tunable 10Gb/s Transmitters and Wavelength Converters," presented at Integrated Photonics Research Conference, San Francisco, California, USA, 2004.
• M. Masanovic, V. Lal, J. Summers, J. Barton, E. Skogen, L. Coldren, and D. Blumenthal, "10 Gbps and 2.5 Gbps Error-Free Operation of a Monolithically Integrated Widely-Tunable All-Optical Wavelength Converter with Independent PhaseControl and Output 35nm Tuning Range" Proc. OFC 2004, ThS5, Los Angeles, CA, (February 22-27, 2004)
• L.A. Johansson, J.S. Barton, and L.A. Coldren, “Analog Performance of an InP Mach-Zehnder Modulator Integrated with a Widely Tunable Laser” Proc. Microwave Photonics 2004, paper no. WB.2, Ogunquit, Maine (October 4-6, 2004)
• Barton Jonathon S., Matt Dummer, Anna Tauke-Pedretti, Erik J. Skogen, James Raring, Matt Sysak, Milan Mašanović, Leif A. Johansson, Larry A. Coldren “InP-based Active Photonic Integrated Circuits” Proc. LEOS annual meeting 2004, paper no. TuA5, pp. 169-170, Puerto Rico (Nov 2004) Invited
• Barton J.S., Skogen E.J., Mašanović M.L., DenBaars S.P., and Coldren L.A., “Widely-tunable high-speed transmitters using integrated SGDBRs and Mach-Zehnder modulators.” IEEE Journal of selected topics in quantum electronics, Vol. 9, No. 5, pp.1113-17. September /October 2003.
• Masanovic M.L., V. Lal, J. S. Barton, E. J. Skogen, L. A. Coldren, and D. J. Blumenthal, "Monolithically integrated Mach-Zehnder interferometer wavelength converter and widely tunable laser in InP," IEEE Photonics Technology Letters, vol. 15, pp. 1117-19, 2003.
• Barton JS, Skogen EJ, Masanovic ML, Raring J, Sysak MN, Johansson L, DenBaars SP, Coldren LA. “Photonic integrated circuits based on sampled-grating distributed-Bragg-reflector lasers.” SPIE-Int. Soc. Opt. Eng. Proceedings of Spie - the International Society for Optical Engineering, vol.4998, 2003, pp.43-54. Invited
• Mašanović M., Skogen EJ, Barton JS, Lal V, Blumenthal DJ, Coldren LA. “Demonstration of monolithically-integrated InP widely-tunable laser and SOA-MZI wavelength converter.” 2003 International Conference Indium Phosphide and Related Materials. Conference Proceedings (Cat. No.03CH37413). IEEE. 2003, pp.289-91. Santa Barbara, California (May 12-16, 2003)
• Barton J. S., Milan L. Mašanović, Matthew N. Sysak, Erik J. Skogen, John Hutchinson, Daniel J. Blumenthal, Larry A. Coldren, “ A Novel Monolithically-Integrated Widely-Tunable Wavelength Converter Based on a SGDBR-SOA-MZ Transmitter and Integrated Photo-Detector,” Proc. Photonics in Switching 2003, paper no. PS.Mo.A9, pp. 34-36, Versailles, France (September 2003)
• Mašanović M.L., Roopesh R. Doshi, Vikrant Lal, Jonathon. S. Barton, Larry A. Coldren, Daniel J. Blumenthal, “First Demonstration of both Analog and Digital Wavelength Conversion using a Monolithically-Integrated InP Widely Tunable All-Optical Wavelength Converter (TAO-WC),” Proc. Photonics in Switching 2003, paper no. PS.Mo.A10, pp. 37-39, Versailles, France (September 2003)
• Mašanović M. L., Vikrant Lal, Jonathon S. Barton, Larry A. Coldren and Daniel J. Blumenthal, “Wavelength Conversion Over a 50nm Input and 21nm Output Wavelength Range Using a Monolithically Integrated Tunable All-Optical MMI-MZI (TAOMI) Wavelength Converter,” Proc. ECOC-IOOC 2003, paper no. Th1.6.5, pp.930-931, Rimini, Italy (September 21-25, 2003)
• Johansson L.A., J.S. Barton, M.L. Masanovic, J.M. Hutchinson, J.A. Henness, Y.A. Akulova, G.A. Fish and L.A. Coldren, “Integrated Optical Components for WDM Optical/Wireless Applications,” Proc. Microwave Photonics, pp. 161-164, Budapest, Hungary (September 2003)
• Mašanović M.L., Vikrant Lal, Leif A. Johansson, Jonathon S. Barton, Larry A. Coldren, Daniel J. Blumenthal, “Characterization of the Chirp Properties of a Monolithically-Integrated Widely-Tunable All-Optical Wavelength Converter (TAO-WC)” Proc. LEOS 2003, paper no. TuCC3, pp. 433-434, Tucson, Arizona (October 2003)
• Hutchinson J.M., Jeffery A. Henness, Leif A. Johansson, Jonathon S. Barton, Milan L. Mašanović, Larry A. Coldren, “2.5 Gb/sec Wavelength Conversion Using Monolithically-Integrated Photodetector and Directly Modulated Widely-Tunable SGDBR Laser,” Proc. LEOS 2003, paper no. WU4, pp. 650-651, Tucson, Arizona (October 2003)
• Hanxing Shi, Cohen D, Barton J, Majewski M, Coldren LA, Larson MC, Fish GA. “Relative intensity noise measurements of a widely tunable sampled-grating DBR laser.” IEEE Photonics Technology Letters, vol.14, no.6, June 2002, pp.759-61.
• Majewski ML, Barton J.S., Coldren LA, Akulova Y, Larson MC. “Direct intensity modulation in sampled-grating DBR lasers.” IEEE Photonics Technology Letters, vol.14, no.6, June 2002, pp.747-9.
• Shi HX, Cohen DA, Barton J, Majewski M, Coldren LA, Larson MC, Fish GA. “Dynamic range of widely tunable sampled grating DBR lasers.” Electronics Letters, vol.38, no.4, 14 Feb. 2002, pp.180-1.
• Skogen EJ, Barton JS, DenBaars SP, Coldren LA. “Tunable sampled-grating DBR lasers using quantum-well intermixing.” IEEE Photonics Technology Letters, vol.14, no.9, Sept. 2002, pp.1243-5.
• Skogen EJ, Barton JS, Denbaars SP, Coldren LA. “A quantum-well-intermixing process for wavelength-agile photonic integrated circuits.” IEEE Journal of Selected Topics in Quantum Electronics, vol.8, no.4, July-Aug. 2002, pp.863-9.
• Barton JS., Skogen, E.J. , Masanovic M., S. Denbaars, L. A. Coldren, “Integration of a Mach-Zehnder Modulator with Sampled Grating Distributed Bragg Reflector Laser,” Proc. Integrated Photonics Research Conference, paper no. 1FC3-1, Vancouver, Canada, July 17-19 2002.
• Majewski ML, Barton J, Coldren LA, Akulova Y, Larson MC. “Widely tunable directly modulated sampled-grating DBR lasers.” Optical Fiber Communications Conference. (OFC). Postconference Technical Digest (IEEE Cat. No.02CH37339). Opt Soc. America. Part vol.1, 2002, pp.537-8 vol.1.
• Skogen E.J., Barton J.S., DenBaars S.P., Coldren, L.A., “On Tuning Efficiency of Sampled Grating DBR Lasers using Quantum Well Intermixing”, Proc.Integrated Photonics Research Conference, paper no. IFC2, Vancouver, Canada July 17-19 2002.
• Mašanović M., Skogen E.J., Barton J.S., Sullivan J., Blumenthal D.J., Coldren L.A., “Cascaded Multimode Interference-Based 1x2 Light Splitter for Photonic Integrated Circuits” Integrated Photonics Research Conference, Vancouver, Canada, July 2002.
• Majewski ML, Barton J, Coldren LA, Akulova Y, Fish G. “Wavelength monitoring in widely tunable sampled-grating DBR lasers integrated with semiconductor optical amplifiers.” Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Conference Edition (IEEE Cat. No.02CH37337). Opt. Soc. America. Part vol.1, 2002, pp.414-16 vol.1.
• Barton JS, Skogen EJ, Masanovic ML, DenBaars SP, Coldren LA. “Tailorable chirp using integrated Mach-Zehnder modulators with tunable sampled grating distributed Bragg reflector lasers.” 2002 IEEE 18th International Semiconductor Laser Conference. Conference Digest (Cat. No.02CH37390). paper no. TuB3,Garmisch, Germany (Sept. 29- Oct. 3) IEEE. 2002, pp.49-50.
• Skogen EJ, Barton JS, Masanovic ML, Getty JT, DenBaars SP, Coldren LA. “Use of post-growth control of the quantum-well band edge for optimized widely-tunable laser-x devices.” 2002 IEEE 18th International Semiconductor Laser Conference. Conference Digest (Cat. No.02CH37390). IEEE. 2002, pp.53-4.
• Skogen EJ, Barton JS, DenBaars SP, Coldren LA. “Wavelength agile photonic integrated circuits using a novel quantum well intermixing process.” Optical Fiber Communications Conference. (OFC). Postconference Technical Digest. Postdeadline Papers (IEEE Cat. No.02CH37339). Opt Soc. America. Part vol.2, 2002, pp.FB8-1-3 vol.2.
• Johansson LA, Barton JS, Coldren L. “High-performance EAM-integrated SGDBR laser for WDM microwave photonic applications.” 2002 International Topical Meeting on Microwave Photonics. Technical Digest (IEEE Cat. No.02EX638). IEICE. 2002, pp.61-4. Tokyo, Japan.
• Barton J, Coldren L, Fish GA. Tunable lasers using sampled grating DBRs. 2001 Digest of LEOS Summer Topical Meetings: Advanced Semiconductor Lasers and Applications/Ultraviolet and Blue Lasers and Their Applications/Ultralong Haul DWDM Transmission and Networking/WDM Components (IEEE Cat. No.01TH8572). IEEE. 2001, pp.2 pp. Invited
• Skogen EJ, Barton J, DenBaars SP, Coldren LA. “Tunable buried ridge stripe sampled grating distributed Bragg reflector lasers utilizing quantum well intermixing.” LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242). IEEE. Part vol.1, 2001, pp.169-70 vol.1.
• Barton J, Coldren L, Fish GA. Tunable lasers using sampled grating DBRs. 2001 Digest of LEOS Summer Topical Meetings: Advanced Semiconductor Lasers and Applications/Ultraviolet and Blue Lasers and Their Applications/Ultralong Haul DWDM Transmission and Networking/WDM Components (IEEE Cat. No.01TH8572). IEEE. 2001, pp.2 pp. Invited
• Skogen EJ, Barton J, DenBaars SP, Coldren LA. “Tunable buried ridge stripe sampled grating distributed Bragg reflector lasers utilizing quantum well intermixing.” LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242). IEEE. Part vol.1, 2001, pp.169-70 vol.1.
• Mason B, Barton J, Fish GA, Coldren LA, Denbaars SP. Design of sampled grating DBR lasers with integrated semiconductor optical amplifiers. IEEE Photonics Technology Letters, vol.12, no.7, July 2000, pp.762-4.
• Blumenthal DJ, Olsson B-E, Rossi G, Dimmick TE, Rau L, Masanovic M, Lavrova O, Doshi R, Jerphagnon O, Bowers JE, Kaman V, Coldren LA, Barton J. “All-optical label swapping networks and technologies.” Journal of Lightwave Technology, vol.18, no.12, Dec. 2000, pp.2058-75.
• Mason B, Fish GA, Barton J, Coldren LA, DenBaars SP. Characteristics of sampled grating DBR lasers with integrated semiconductor optical amplifiers. Optical Fiber Communication Conference. Technical Digest Postconference Edition. Trends in Optics and Photonics Vol.37 (IEEE Cat. No. 00CH37079). Opt. Soc. America. Part vol.1, 2000, pp.193-5 vol.1.
• Choquette KD, Barton JS, Geib KM, Allerman AA, Hindi JJ. Short wavelength bottom-emitting VCSELs. SPIE-Int. Soc. Opt. Eng. Proceedings of Spie.