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Dr. Chang has done research in dispersion minimization of single mode optical fibers by canceling material and waveguide dispersions, experimental demonstration of dichroic duplex transmission through a single optical fiber, characterization of a fiber optic delay line devices for radio frequency signal processing, development of a radar moving target indicator using fiber optic delay lines, and optoelectronic time division multiplexing and demultiplexing . His experience also includes work on coherence, light fluctuations, photon statistics, and holograms. He is currently conducting research in PV-FETs, PV-PINs, and Photo-injection Back-to-back PIN Switches for RF/ microwave switching as well as in optoelectronic sample and hold circuits.
At San Diego State University he initiated graduate and undergraduate courses in optical fiber communications as well as electronic materials and devices. He has taught electronic circuits, electromagnetic fields, electronic materials and devices, microwave engineering, solid state electronic devices, and optical fiber communications.
EDUCATION
Ph.D. Electrical Engineering, University of Washington,1975
M.S. Physics, National Dakota State University, 1969
B.S. Physics, National Taiwan Normal University, 1966
COURSES TAUGHT
| EE340 | Electrical and Magnetic Fields |
| EE434 | Electronic Materials and Devices |
| EE430 | Analysis and Design of Electronics Circuits |
| EE 450 | Transmission Lines for High Speed Electronics and Microwaves |
| EE 546 | Optical Fiber Communication Systems |
| EE 642 | Optical Communications |
EXPERIENCE
1979 - present: Associate Professor (1979 - 1983), Professor (1983 - ), Dept. of Electrical & Computer Engineering, San Diego State University, San Diego,California.
1977 - present: Electronics Engineer (full time 1977 - 1979 and part time 1979-1986), Consultant (1986 - present), SPAWAR System Center (formerly Naval Ocean Systems Center), San Diego, California.
1975 - 1977: Research Associate, Dept. of Electrical Engineering, University of Washington, Seattle, Washington.
1969 - 1975: Predoctoral Research or Teaching Associate, Dept. of Electrical Engineering, University of Washington, Seattle, Washington.
1967 - 1969: Teaching Assistant, Dept. of Physics, North Dakota State University, Fargo, North Dakota.
CONSULTING:
Consultant, Naval Research and Development, Point Loma, California
Consultant, Naval Ocean Systems Center, San Diego, California
PATENTS:
C.T. Chang, "Minimum Dispersion at 1.55 mm for Single-Mode Step-Index Fibers," U.S. Patent
No. 4,300,930,
November 17, 1981.
C.T. Chang, "Triple Minimum Dispersion Wavelengths for Single-Mode Step-Index Fibers," U.S. Patent No. 4,402,570, September 6, 1983.
C.K. Sun, C.C. Wu, C.T. Chang, P.K.L. Yu, and W.H. McKnight,"A Bridge Type Optoelectronic Sample and Hold Circuit", U.S. Patent No. 5,239,181, August 24, 1993.
D. J. Albares, C. T. Chang, C.K. Sun, and E.W. Jacobs,"High Power Narrow Pulse Laser Diode Circuit," U.S. Navy Case No 75593, 1995.
PUBLICATIONS and PRESENTATIONS (since 1990)
C.T. Chang, D.J. Albares, G. Imthurn, R. Ogden, M.J. Taylor, and G.A. Garcia, "Optoelectronic Switches and an 8:1 Time Multiplexer," IEEE Trans. Electron Devices 37, 1969-1975 (1990).
C.K. Sun, C.C. Wu, C.T. Chang, P.K.L. Yu, and W.H. McKnight, "Bridge Type Optoelectronic Sample and Hold Circuit," Proc. SPIE 1476, 294-300 (1991).
G.P. Imthurn, C.T. Chang, G.A. Garcia, and D.J. Albares," Photoactivated Switches and Applications," DARPA/Rome Laboratories Symposium on Photonic Systems for Antenna Applications, Naval Postgraduate School, Monterey, CA, 10-12 Dec (1991).
C.K. Sun, C.C. Wu, C.T. Chang, P.K.L. Yu, and W.H. McKnight, "A Bridge Type Optoelectronic Sample and Hold Circuit," J. Lightwave Technol. 9, 341-346 (1991).
D.J. Albares, C.T. Chang, G.P. Imthurn, M. J. Taylor, and G.A. Garcia, "Optoelectronic Time Multiplexing," IEEE Workshop on Interconnections within High-Speed Digital Systems, Santa Fe, NM, 18-20 May (1992).
C.K. Sun, P.K.L. Yu, C.T. Chang, and D.J. Albares, "Simulation and Interpretation of Fast Rise Time of Light Activated PIN Diode Switches," IEEE Trans. Electron Devices 39, 2240-2243 (1992).
D.J. Albares, C.T. Chang, G.P. Imthurn, G.A. Garcia, R.W. Major, M.J. Taylor, and C.K. Sun," invited paper, Digest Government Microelectronic Conference, 301-303 (1992).
G.P. Imthurn, C.T. Chang, D.J. Albares, G.A. Garcia, and M.J. Taylor, "Optoelectronic 6.6 Gb/s 1:8 Time Demultiplexer," Proc. SPIE 2149, 172-176 (1994).
N. Kamikawa and C.T. Chang, "A Quasi-Single Mode Optical Fiber for Long Haul Transmission in Severe Bending Environments," IEEE Photon. Technol. Lett. 6, 428-430 (1994).
C.K. Sun, R. Nguyen, S. Hart, D.J. Albares, and C.T. Chang, "Photovoltaic-FET Switch for Photonic Reconfiguration of Antennas," 6th Annual ARPA Symposium on Photonic Systems for Antenna Applications, Naval Postgraduate School, Monterey, CA, 5-7 March (1996).
D.J. Albares, C.K. Sun, R. Nguyen, S. Hart, and C.T. Chang, "Photovoltaic-FET Switch for Photonic RF-Microwave Switching," Proc. DoD Photonics Conf. 96, 381-384 (1996).
C. T. Chang, C.K. Sun, D. J. Albares, and E.W. Jacobs, "High-Energy (59 pJ) and Low-Jitter (250 fs) Picosecond Pulses from Gain-Switching of a Tapered-Stripe Laser diode via Resonant Driving," IEEE Photon. Technol. Lett. 8, 1157-1159 (1996).
C.K. Sun, R. Nguyen, C.T. Chang, and D.J. Albares, "PV-FETS for RF/uwave switching," IEEE Trans. Microwave Theory Tech. 44, 1747-1750 (1996).
C.K. Sun, R. Nguyen, D.J. Albares, and C.T. Chang, "Photovoltaic-PIN Switches for Photonically Reconfigurable Monopole Antenna," 7th Annual ARPA Symposium on Photonic Systems for Antenna Applications, Naval Postgraduate School, CA, 15-17 March (1997).
C.K. Sun, R. Nguyen, D.J. Albares, and C.T. Chang,"Photo-injection Back-to-back PIN Switch for RF Control, Electron. Lett. 33, 1579-1580 (1997).
C.K. Sun, C.T. Chang, R. Nugyen, and D.J. Albares," Photovoltaic-PIN Diodes for RF Control:Switching Applications," submitted to IEEE Trans. Microwave Theory Tech. (1997).
C.K. Sun, R. Nugyen, D.J Albares, and C.T. Chang," Photo-injection Back-to-back PIN switch
for RF Control," 8th Annual ARPA Symposium on Photonic Systems for Antenna Applications,
Naval Postgraduate School, CA, 14-16
January (1998).
SCIENTIFIC AND PROFESSIONAL SOCIETIES:
Institute of Electrical and Electronic Engineers
HONORS AND AWARDS:
Meritorious Performance and Professional Promise Award, SDSU, 1990.
GRANT AWARDS OF LAST FIVE YEARS:
"Transmission High Power Laser Energy Through Optical Fibers", with G.Massey, $12,000, 1993.
"Optical Multiplexing", Naval Ocean Systems Center, $70,000, 1991.
"Optical Multiplexing", Naval Ocean Systems Center, $59,947, 1990-91.
CONFERENCE ATTENDANCE:
Conference on Optical Fiber Communication, San Diego, California, February 18-22, 1991.
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