IEEE Photonics Journal (Jan 2017)
Proactive and Nondisruptive Channel Probing for Wavelength Switching in Optical Transmission
Abstract
Proactive and nondisruptive channel probing is investigated for the measurement of channel power, amplifier channel gain, and optical signal-to-noise ratio (OSNR) without disrupting established wavelength-division multiplexed channels. Using a nondisruptive probe signal over a three-span link, wavelength switching-induced power excursions are predicted to be within ±0.2 dB, and OSNR as high as 20 dB is accurately measured with a maximum of 0.5 dB error.
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