Development of a packaged optical phase-locked loop for use as a signal source in phased-array communications antennas

Lloyd N. Langley; Colin Edge; Michael J. Wale; Ulrik B. Gliese; Alwyn J. Seeds; Xuan Huang; James G. Wright; Louis A. Coryell

doi:10.1117/12.330389

3 November 1998 Development of a packaged optical phase-locked loop for use as a signal source in phased-array communications antennas

Lloyd N. Langley, Colin Edge, Michael J. Wale, Ulrik B. Gliese, Alwyn J. Seeds, Xuan Huang, James G. Wright, Louis A. Coryell

Author Affiliations +

Proceedings Volume 3463, Photonics and Radio Frequency II; (1998) https://doi.org/10.1117/12.330389
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

A packaged diode-laser OPLL sub-system has been constructed for evaluation in a proof-of-concept coherent optical beamforming system. The loop has been implemented with narrow linewidth laser diodes, micro-optics and wide bandwidth electronics to give optimum phase noise performance. The laser diodes are designed for wide bandwidth and high FM-efficiency, while the main challenge in the construction of the packaged OPLL is the realization of a high gain loop, with a small propagation delay. A total phase variance of 0.05 rad² has been achieved, and that within the 15 MHz system bandwidth is 0.0007 rad². The OPLL can operate with LO frequencies from 7-15 GHz. This paper details the performance of the completed OPLL module together with key results for the custom FM lasers designed and fabricated for use within it.

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Lloyd N. Langley, Colin Edge, Michael J. Wale, Ulrik B. Gliese, Alwyn J. Seeds, Xuan Huang, James G. Wright, and Louis A. Coryell "Development of a packaged optical phase-locked loop for use as a signal source in phased-array communications antennas", Proc. SPIE 3463, Photonics and Radio Frequency II, (3 November 1998); https://doi.org/10.1117/12.330389

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