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Proceedings Paper

Self-homodyne interferometric detection in 2×4 optical hybrid for free-space optical communication
Author(s): Ya'nan Zhi; Yu Zhou; Jianfeng Sun; Aimin Yan; Zhu Luan; Liren Liu
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Paper 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.

Paper Details

Date Published: 24 August 2010
PDF: 8 pages
Proc. SPIE 7814, Free-Space Laser Communications X, 781412 (24 August 2010); doi: 10.1117/12.859983
Show Author Affiliations
Ya'nan Zhi, Shanghai Institute of Optics and Fine Mechanics (China)
Yu Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Jianfeng Sun, Shanghai Institute of Optics and Fine Mechanics (China)
Aimin Yan, Shanghai Institute of Optics and Fine Mechanics (China)
Zhu Luan, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 7814:
Free-Space Laser Communications X
Arun K. Majumdar; Christopher C. Davis, Editor(s)

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