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We experimentally demonstrate a chromatic dispersion monitoring technique utilizing a delay-line interferometer and a <10-GHz photodetector for 40-Gb/s OOK/DPSK. Spectral shift of RF dip changing with up to 560-ps/nm-CD is measured insensitive to 23-ps-DGD and <15-dB-OSNR.
© 2010 Optical Society of America
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