Optical homodyne BPSK receiver with Doppler shift compensation for LEO-GEO optical communication

This paper presents Bread Board Model (BBM) of homodyne BPSK (Binary Phase Shift Keying) receiver with an optical phase locked loop and a Doppler shifts compensator for inter-satellite optical communication link. 7.2Gbps BPSK data has been demodulated with sensitivity of -43dBm at bit error rate of 1e-6 under initial frequency offset of +/-7.5 GHz simulated as Doppler shifts due to relative motion of each satellite.