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

Langley, LN; Edge, C; Wale, MJ; Gliese, U; Seeds, AJ; Huang, X; Wright, J; (1998) Development of a packaged optical phase locked loop for use as a signal source in phased array communications antennas. In: Zagar, GJ and Goutzoulis, AP and Pirich, AR, (eds.) PHOTONICS AND RADIO FREQUENCY II. (pp. 220 - 226). SPIE-INT SOC OPTICAL ENGINEERING

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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, whilst the main challenge in the construction of the packaged OPLL is the realisation of a high gain loop, with a small propagation delay. A total phase variance of 0.05 rad(2) has been achieved (infinite bandwidth), and that within the 15 MHz system bandwidth is 0.0007 rad(2). 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 from the custom FM lasers designed and fabricated for use within it.

Type: Proceedings paper
Title: Development of a packaged optical phase locked loop for use as a signal source in phased array communications antennas
Event: Conference on Photonics and Radio Frequency II
Location: SAN DIEGO, CA
Dates: 1998-07-21 - 1998-07-22
ISBN: 0-8194-2918-X
Keywords: phased array antennas, optical beamforming, optical phase locked loops, FM lasers
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/130631
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