Optical signal-to-noise ratio monitoring using uncorrelated beat noise

We propose and experimentally demonstrate a new technique for monitoring optical signal-to-noise ratio (OSNR). The noisy signal to be measured is split into two paths. With offset optical bandpass filters and balanced radio-frequency subtraction after detection, the signal is separated from the beat noise. OSNR can then be monitored by analyzing this beat noise. An experiment for a 10-Gb/s system shows that for OSNR in the range of 10-30 dB, the proposed OSNR monitoring scheme produces errors of less than 0.5 dB.

[1]  Dennis Derickson,et al.  Fiber optic test and measurement , 1998 .

[2]  William Shieh,et al.  Optical Signal-to-Noise Ratio Monitoring Using Uncorrelated Signal-Spontaneous Beat Noise , 2004 .

[3]  Y.C. Chung,et al.  An improved OSNR monitoring technique based on polarization-nulling method , 2001, OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171).

[4]  Y. C. Chung,et al.  A novel optical signal-to-noise ratio monitoring technique for WDM networks , 2000, Optical Fiber Communication Conference. Technical Digest Postconference Edition. Trends in Optics and Photonics Vol.37 (IEEE Cat. No. 00CH37079).

[5]  A.E. Willner,et al.  Optical performance monitoring , 2004, Journal of Lightwave Technology.

[6]  M. Yamashita,et al.  Optical performance monitor built into EDFA repeaters for WDM networks , 1998 .

[7]  M. Fishteyn,et al.  Optical performance monitoring using nonlinear detection , 2004, Journal of Lightwave Technology.

[8]  E. Desurvire,et al.  Erbium‐Doped Fiber Amplifiers: Principles and Applications , 1995 .