Self-homodyne interferometric detection in 2×4 optical hybrid for free-space optical communication

Ya'nan Zhi; Yu Zhou; Jianfeng Sun; Aimin Yan; Zhu Luan; Liren Liu

doi:10.1117/12.859983

24 August 2010 Self-homodyne interferometric detection in 2×4 optical hybrid for free-space optical communication

Ya'nan Zhi, Yu Zhou, Jianfeng Sun, Aimin Yan, Zhu Luan, Liren Liu

Proceedings Volume 7814, Free-Space Laser Communications X; 781412 (2010) https://doi.org/10.1117/12.859983
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

The time-delay self-homodyne interferometric detection used in 2×4 90° optical hybrid for free-space optical communication is presented. An asymmetric Mach-Zehnder interferometer splits the received signal into two paths and recombines these two signals after a optical path difference. A balanced receiver follows the interferometer as a multiplier. The modulation contrast in the interferometer depends on the interference of identical wave-fronts, not on the quality of the wave-front itself. So it does not require wave-front compensation techniques, a local oscillator laser nor does it need frequency locking. The scheme can eliminate the effect of wave-front deformation on coherent detection in free-space optical communication effectively.

Citation Download Citation

Ya'nan Zhi, Yu Zhou, Jianfeng Sun, Aimin Yan, Zhu Luan, and Liren Liu "Self-homodyne interferometric detection in 2×4 optical hybrid for free-space optical communication", Proc. SPIE 7814, Free-Space Laser Communications X, 781412 (24 August 2010); https://doi.org/10.1117/12.859983

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