Simultaneous chromatic dispersion, polarization-mode-dispersion and OSNR monitoring at 40Gbit/s.

A novel method for independent and simultaneous monitoring of chromatic dispersion (CD), first-order PMD and OSNR in 40Gbit/s systems is proposed and demonstrated. This is performed using in-band tone monitoring of 5GHz, optically down-converted to a low intermediate-frequency (IF) of 10kHz. The measurement provides a large monitoring range with good accuracies for CD (4742+/-100ps/nm), differential group delay (DGD) (200+/-4ps) and OSNR (23+/-1dB), independently of the bit-rate. In addition, the use of electro-absorption modulators (EAM) for the simultaneous down-conversion of all channels and the use of low-speed detectors makes it cost effective for multi-channel operation.

[1]  D.J. Blumenthal,et al.  Optical performance monitoring in reconfigurable WDM optical networks using subcarrier multiplexing , 2000, Journal of Lightwave Technology.

[2]  Wen-De Zhong,et al.  New transmitter configuration for subcarrier multiplexed DPSK systems and its applications to chromatic dispersion monitoring. , 2007, Optics express.

[3]  A.E. Willner,et al.  Optical performance monitoring , 2004, Journal of Lightwave Technology.

[4]  Rongqing Hui,et al.  Fiber chromatic dispersion and polarization-mode dispersion monitoring using coherent detection , 2005, IEEE Photonics Technology Letters.

[5]  Keun Joo Park,et al.  A simultaneous monitoring technique for polarization-mode dispersion and group-velocity dispersion , 2002, Optical Fiber Communication Conference and Exhibit.

[6]  M. Ibsen,et al.  Compact high-power tunable three-level operation of double cladding Nd-doped fiber laser , 2005, IEEE Photonics Technology Letters.

[7]  Guifang Li,et al.  In-service monitoring of chromatic dispersion and polarization mode dispersion for RZ-DPSK signal based asynchronous amplitude histogram evaluation , 2006, 2006 Optical Fiber Communication Conference and the National Fiber Optic Engineers Conference.

[8]  Y. Lizé,et al.  Independent and Simultaneous Monitoring of Chromatic and Polarization-Mode Dispersion in OOK and DPSK Transmission , 2007, IEEE Photonics Technology Letters.

[9]  L. Moller,et al.  Comparison of different feedback signals for one-stage polarization-mode dispersion compensators , 2005, IEEE Photonics Technology Letters.

[10]  Rongqing Hui,et al.  Fiber chromatic dispersion and polarization-mode dispersion monitoring using coherent detection , 2005 .