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All-optical chromatic dispersion monitoring of a 40-Gb/s RZ signal by measuring the XPM-generated optical tone power in a highly nonlinear fiber

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7 Author(s)
Luo, T. ; Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA ; Yu, C. ; Pan, Z. ; Wang, Y.
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We experimentally demonstrate an all-optical chromatic dispersion (CD) monitoring technique potential for ultrahigh-speed systems. A monochromatic continuous wave probe is coupled with the tapped-off data signal into a highly nonlinear fiber. An optical tone that is sensitive to CD is generated near the probe wavelength due to the cross-phase modulation effect and is used for CD monitoring. The monitoring window is ±42 ps/nm for 40-Gb/s return-to-zero systems. This monitoring technique is simple and needs no modification at the transmitter.

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Photonics Technology Letters, IEEE  (Volume:18 ,  Issue: 2 )