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

作者：Chen Wei^*; Tucker Rodney S; Yi Xingwen; Shieh William; Evans Jamie S

来源：IEEE Photonics Technology Letters, 2005, 17(11): 2484-2486.

DOI：10.1109/LPT.2005.858100

• Amplified spontaneous emission (ASE) noise
• Beat noise
• Offset optical bandpass filters
• Optical signal-to-noise ratio (OSNR) monitoring

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.

• 出版日期2005
• 单位The University of Melbourne