Fiber Optic Links For Microwave/Millimeter-Wave Systems

J. J. Pan

doi:10.1117/12.960153

17 January 1989 Fiber Optic Links For Microwave/Millimeter-Wave Systems

J. J. Pan

Proceedings Volume 0995, High Frequency Analog Communications; (1989) https://doi.org/10.1117/12.960153
Event: O-E/Fiber LASE '88, 1988, Boston, MA, United States

Abstract

Microwave and millimeter-wave (M/MMW) communications, radars, and electronic warfare systems demand fiber optic links for improving system flexibility, mobility, wide instan-taneous bandwidth, deployment speed/simplicity, reducing system cost, immunity of EMI/EMP, increasing interconnect or remoting distance, and upgrading system performance. Both direct modulation and external modulation approaches of laser diode are feasible for M/MMW fiber optics. Performance tradeoff of these two approaches is analyzed for various system applications in this paper. System level parameters analyses, design/optimization techniques, and hardware fabrication/selection of M/MMW analog fiber optic links are presented. Different schemes of coherent optic detection (including heterodyne and homodyne) using integrated optics (10) can improve system performance considerably. 21 GHz, 30 GHz, and 12 GHz fiber optic systems with 1 km link distance designs, construction methods, and experimental data will be discussed. For example, the preliminary test results of the 21 GHz link, using a RF power enhanced LiNbO₃ electro-optic modu-lator (EOM) and an InGaAs PIN photodetector, provides a signal-to-noise ratio (SNR) of 105 dB/Hz without any fine adjustment. A 30 GHz link achieves an SNR of 84 dB/Hz at EOM driving power of +2 dBm.

Citation Download Citation

J. J. Pan "Fiber Optic Links For Microwave/Millimeter-Wave Systems", Proc. SPIE 0995, High Frequency Analog Communications, (17 January 1989); https://doi.org/10.1117/12.960153

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