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All-optical in-band OSNR monitoring at 40 Gb/s using a nonlinear optical loop mirror

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4 Author(s)
Adams, R. ; Centre for Ultrahigh Bandwidth Devices for Opt. Syst., Univ. of Sydney, NSW ; Rochette, M. ; Ng, T.T. ; Eggleton, B.J.

We present an all-optical in-band optical signal-to-noise ratio (OSNR) monitor using a nonlinear optical loop mirror. Monitoring is enabled from the nonlinear power transfer function of the loop mirror. Experimental results are provided at 40 Gb/s for three modulation formats: nonreturn-to-zero, carrier-suppressed return-to-zero, and return-to-zero. The monitor discriminates the various OSNR levels over a dynamic range of more than 25 dB with every modulation format

Published in:

Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 3 )