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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 1 — Jan. 9, 2006
  • pp: 58–62

Simple PMD-insensitive OSNR monitoring scheme assisted by transmitter-side polarization scrambling

Guo-Wei Lu, Man-Hong Cheung, Lian-Kuan Chen, and Chun-Kit Chan  »View Author Affiliations


Optics Express, Vol. 14, Issue 1, pp. 58-62 (2006)
http://dx.doi.org/10.1364/OPEX.14.000058


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Abstract

Recently, degree of polarization (DOP) of light has been utilized as a parameter to monitor optical signal-to-noise-ratio (OSNR). However, in the presence of polarization-mode dispersion (PMD), when using DOP to determine OSNR, OSNR is always underestimated due to the depolarization effect induced by PMD. In this paper, we propose and experimentally demonstrate a simple PMD-insensitive OSNR monitoring technique based on DOP measurement. By the assistance of the transmitter-side polarization scrambling, the in-service OSNR parameter can be accurately derived from the measured maximum DOP value within the polarization scrambling period, which is immune to PMD effect. The monitoring performance is experimentally evaluated by statistical method at OSNR of 25 dB. Experimental results show that OSNR monitoring with about 1-dB standard deviation can be achieved in a 10-Gb/s NRZ-OOK system with DGD varying from 0 to 80 ps.

© 2006 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(260.5430) Physical optics : Polarization

ToC Category:
Fiber Optics and Optical Communications

Citation
Guo-Wei Lu, Man-Hong Cheung, Lian-Kuan Chen, and Chun-Kit Chan, "Simple PMD-insensitive OSNR monitoring scheme assisted by transmitter-side polarization scrambling," Opt. Express 14, 58-62 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-1-58


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References

  1. Alan Eli Willner, S.M.R. Motaghian Nezam, Lianshan Yan, Zhongqi Pan, Michelle C. Hauer, "Monitoring and control of polarization-related impairments in optical fiber systems," IEEE J. Lightwave Technol. 22, 106-125 (2004). [CrossRef]
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  8. Chongjin Xie, Daniel C. Kilper, "Influence of polarization scattering on polarization-assisted OSNR monitoring in dense WDM systems with NZ-DSF and Raman Amplification", in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, Washington DC, 2005), paper JWA40.
  9. Mats Skold, Bengt-Erik Olsson, Henrik Sunnerud, and Magnus Karlsson, "PMD-insensitive DOP-based OSNR monitoring by spectral SOP measurements," in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, Washington DC, 2005), paper OThH3.

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