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...

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Bibliographic Details
Published in:IEEE photonics technology letters 2005-11, Vol.17 (11), p.2484-2486
Main Authors: Wei Chen, Tucker, R.S., Xingwen Yi, Shieh, W., Evans, J.S.
Format: Article
Language:English
Subjects:
Amplified spontaneous emission (ASE) noise
Balancing
Band pass filters
beat noise
Errors
Monitoring
Noise
Noise levels
Noise shaping
Nonlinear optics
Optical attenuators
Optical communication
Optical filters
Optical noise
optical signal-to-noise ratio (OSNR) monitoring
Photonics
Radio frequency
Signal to noise ratio
Wavelength division multiplexing
wavelength-division multiplexing (WDM)
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Description
Summary: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.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2005.858100