Research of balanced detection techniques for high speed weak optical signal

LIU Hongyang; ZHANG Yange; AI Yong; DAI Yonghong; CHEN Jing

doi:10.7510/jgjs.issn.1001-3806.2015.02.007

Long-distance high speed weak photoelectric detection technology is widely used in laser communication. To detect the weak signal which is not buried in the noisy environment, balanced detection technology becomes more and more important. Single pipe coherent detection and balanced coherent detection were compared firstly. After theoretical analysis and numerical simulation, signal-to-noise ratio of the balanced detection was greatly superior to that of the single tube detection when the consistency coefficient was bigger than 0.6. The minimum detectable optical power of the single tube detection and balanced detection was analyzed. The results prove the superiority of balanced detection technology used in high speed weak optical signal detection.

Research of balanced detection techniques for high speed weak optical signal

Corresponding author: ZHANG Yange, zyg@whu.edu.cn;

1. School of Electronic Information, Wuhan University, Wuhan 430000, China

Received Date: 2014-06-24

Accepted Date: 2014-07-04

Available Online: 2015-03-25

Abstract: Long-distance high speed weak photoelectric detection technology is widely used in laser communication. To detect the weak signal which is not buried in the noisy environment, balanced detection technology becomes more and more important. Single pipe coherent detection and balanced coherent detection were compared firstly. After theoretical analysis and numerical simulation, signal-to-noise ratio of the balanced detection was greatly superior to that of the single tube detection when the consistency coefficient was bigger than 0.6. The minimum detectable optical power of the single tube detection and balanced detection was analyzed. The results prove the superiority of balanced detection technology used in high speed weak optical signal detection.

HTML

Reference (10)

[1]	CHAN W S V.Free-space optical communications[J].Journal of Lightwave Technology, 2006,24(12):4750-4862.
[2]	SALZ J. Modulation and detection for coherent lightwave communications[J].IEEE Communication Magazine,1986,24(6):38-49.
[3]	PAINCHAUD Y, POULIN M, MORIN M T. Performance of balanced detection in a coherent receiver[J].Optics Express,2009,17(5):3659-3672.
[4]	BARRY J R, LEE E A. Performance of coherent optical receivers[J]. Proceedings of the IEEE, 1990, 78(8): 1369-1394.
[5]	XU N, LIU L R, LIU D A, et al. Technologies and recent progress of coherent optical communications in free space[J]. Laser & Optoelectronics Progress,2007(8):44-51(in Chinese).
[6]	LE Y F, LI X X, JU A S. Design of phase comparator in a laser heterodyne interferometer[J]. Laser Technology,2014,38(1):119-123(in Chinese).
[7]	ARVIZU A, MENDIETA F J, CHÁVEZ R. Balanced photoreceiver for coherent optical communications[J].Instrumentation and Development, 1998, 3(10): 3-14.
[8]	JIANG H,WU H J,WU Y F.A novel ultra-broadband photoelectric detection module[J].Laser Technology,2013,37(1):16-19(in Chinese).
[9]	PANG Y J, GAO L, WANG Ch H. Analysis of IQ demodulation and signal noise ratio for 2μm dual-balanced heterodyne detection[J]. Chinese Journal of Lasers, 2012, 39(1):0l14001(in chinese).
[10]	YUEN H P, CHAN V W S. Noise in homodyne and heterodyne detection[J]. Optics Letters, 1983, 8(3): 177-179.

Research of balanced detection techniques for high speed weak optical signal

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views