1 February 1991 Low-loss L-band microwave fiber optic link for control of a T/R module
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Proceedings Volume 1374, Integrated Optics and Optoelectronics II; (1991) https://doi.org/10.1117/12.24960
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States
Abstract
An experimental directly modulated fiber-optic link assembled and optimized for L-band operation with near-zero RF insertion loss is presented. This was achieved by optimizing the critical coupling of light from the laser diode to a single-mode fiber and by applying reactive matching circuits to the laser and detector in order to minimize RF reflection losses. Microwave performance measurements are made on the fiber-optic-fed T/R module, in terms of noise figure, intermodulation distortion, and dynamic range, and compared with the module performance without the fiber-optic link. It is shown that careful attention to optical coupling and to the reactive matching of the optical laser and detector transducers can lead to a link gain of -1.8 dB at 1.3 GHz and a 150 MHz bandwidth. The 66.5 dB/MHz exp 2/3 spurious-free dynamic range exhibited by the present link in conjunction with a T/R module demonstrated the feasibility of employing fiber optics in many antenna-remoting optically-controlled phase arrays and optical microwave interconnect applications.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Stephen Wanuga, Stephen Wanuga, Edward I. Ackerman, Edward I. Ackerman, Dumrong Kasemset, Dumrong Kasemset, David W. Hogue, David W. Hogue, Stephen R. Chinn, Stephen R. Chinn, } "Low-loss L-band microwave fiber optic link for control of a T/R module", Proc. SPIE 1374, Integrated Optics and Optoelectronics II, (1 February 1991); doi: 10.1117/12.24960; https://doi.org/10.1117/12.24960
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