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Proceedings Paper

Homodyne PSK receivers with laser diode sources
Author(s): G. Stephen Mecherle; Robert J. Henderson
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Paper Abstract

Receiver structures are developed to implement homodyne detection operating near the quantum limit and optimal bandwidth efficiency using monolithic laser diodes. The homodyne receiver approaches examined used NRZ and RZ formats and AM and PM subcarriers. Signalling schemes using subcarriers or Manchester BPSK can achieve a factor of 20-27 relaxation in laser linewidth requirements by minimizing the spectral overlap between the data modulation and the phase tracking loop. It is shown that Manchester BPSK (with 0.5 dB carrier leakage) can achieve 2.5 dB better receiver sensitivity than heterodyne BPSK with better bandwidth efficiency and an overall IF linewidth requirement of 390 kHz for a Gbps data rate and 0.5 dB phase tracking penalty at BER of 10 exp -6. For 1 dB carrier leakage, the IF linewidth requirement relaxes to 830 kHz. The feasibility of homodyne BPSK receivers with monolithic laser diode sources is established.

Paper Details

Date Published: 1 June 1991
PDF: 9 pages
Proc. SPIE 1417, Free-Space Laser Communication Technologies III, (1 June 1991); doi: 10.1117/12.43786
Show Author Affiliations
G. Stephen Mecherle, TRW Electronic Systems Group (United States)
Robert J. Henderson, TRW Electronic Systems Group (United States)


Published in SPIE Proceedings Vol. 1417:
Free-Space Laser Communication Technologies III
David L. Begley; Bernard D. Seery, Editor(s)

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