Homodyne PSK receivers with laser diode sources

G. Stephen Mecherle; Robert J. Henderson

doi:10.1117/12.43786

1 June 1991 Homodyne PSK receivers with laser diode sources

G. Stephen Mecherle, Robert J. Henderson

Proceedings Volume 1417, Free-Space Laser Communication Technologies III; (1991) https://doi.org/10.1117/12.43786
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

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.

Citation Download Citation

G. Stephen Mecherle and Robert J. Henderson "Homodyne PSK receivers with laser diode sources", Proc. SPIE 1417, Free-Space Laser Communication Technologies III, (1 June 1991); https://doi.org/10.1117/12.43786

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