Vijaysekhar Jayaraman

Dr. Jayaraman is the founder of Praevium Research, and principal investigator on all of  Praevium’s research and development efforts.

He received his BS/MS in Electrical Engineering from the Massachusetts Institute of Technology in 1985, and a Ph.D. in Electrical Engineering from University of California, Santa Barbara in 1994. From 1985-1988, Dr. Jayaraman was a staff member at MIT Lincoln Laboratory, where he contributed to the development of a space-based optical heterodyne communication system.

Prior to founding Praevium Research in 2001, Dr. Jayaraman’s work included the first demonstration of the SGDBR tunable laser while a graduate student at UCSB. This device has since been deployed worldwide in commercial wavelength division multiplexing (WDM) networks. Dr. Jayaraman also contributed to the early development of electrically and optically pumped 1300 nm VCSELs while employed at Optical Concepts/W.L Gore and associates and UCSB . At Praevium, he has spearheaded much of the work described on the Technology page.

Representative publications

1. V. Jayaraman, Z.M. Chuang, and L.A. Coldren, “Theory, Design, and Performance of Extended Tuning Range Semiconductor Lasers with Sampled gratings,” IEEE Journal of Quantum Electronics, vol. 29, no. 6, pp. 1824-1834, June 1993.
2. V.Jayaraman, M.E.Heimbuch, L.A.Coldren, and S.P. Denbaars, “Widely Tunable Continuous-Wave InGaAsP/InP Sampled Grating Lasers, Electronics Letters, vol. 30, no. 13, pp. 1492-3, Sept. 1, 1994.
3. V. Jayaraman, “VCSEL Makers Pursue Lower Cost 1300 nm diodes,” (Heather Williamson Messenger Young Investigator Award) Laser Focus World, vol. 35, no. 8, August 1999, pp.159-168.
4. V. Jayaraman, M.Mehta, A.W. Jackson, S. Wu, Y. Okuno, J. Piprek, and J.E. Bowers, “High Power 1320 nm Wafer Bonded VCSELs with Tunnel Junctions,”  IEEE Photonics Technology Letters,  vol. 15, no. 11, November, 2003, pp. 1495-1497
5. V. Jayaraman and E. Hall “High Power Broadband Superluminescent Diode,” U.S. Patent no. 7,671,997, March 2, 2010.
6. V. Jayaraman “System for Swept Source Optical Coherence Tomography,” U.S. Patent no. 7,468,997, Dec. 23, 2008.


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