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ABSTRACT: We demonstrate a fast-speed PMDC for 40 Gb/s DBPSK and DQPSK. The PMDC increases tolerable average PMD of the DBPSK and DQPSK system to 9 ps and 18 ps, respectively.
Optical Communication, 2008. ECOC 2008. 34th European Conference on; 10/2008
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ABSTRACT: A method to test the dynamic performance of polarization mode dispersion (PMD) compensators (PMDCs) is presented. The dynamic performance of an optical PMDC combined with electronic equalizers is measured before and after forward error correction.
Optical Fiber communication/National Fiber Optic Engineers Conference, 2008. OFC/NFOEC 2008. Conference on; 03/2008
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ABSTRACT: We investigate the performance of the one-stage polarization-mode dispersion (PMD) compensator with a fixed delay line. We find that there exists an optimum delay line length for the PMD compensator and the optimum delay line length decreases with the increase of signal bandwidths. We show that such PMD compensators, when optimized, can achieve almost the same performance as that achieved by those with a variable delay line.
IEEE Photonics Technology Letters 10/2003; · 2.19 Impact Factor
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ABSTRACT: The polarization-mode dispersion (PMD) tolerance of different modulation formats is studied, including ON-OFF keyed (OOK), differential phase-shift keyed (DPSK), and carrier-suppressed return-to-zero (CSRZ) formats. It is shown that, generally, for PMD uncompensated systems, the modulation formats with larger pulsewidth have larger penalty, while the modulation formats with smaller bandwidth perform better in PMD compensated systems. It is also shown that DPSK can tolerate more PMD than OOK for both PMD uncompensated and compensated systems, and that CSRZ, because of its specific spectrum characteristics, has a different feature from return-to-zero formats.
IEEE Photonics Technology Letters 09/2003; · 2.19 Impact Factor
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ABSTRACT: We show that DPSK systems can tolerate more PMD than OOK systems, and that CSRZ has a different feature from RZ with respect to PMD, because of its specific spectrum and phase characteristics.
Optical Fiber Communications Conference, 2003. OFC 2003; 04/2003
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IEEE Photonics Technology Letters 08/2002; · 2.19 Impact Factor
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ABSTRACT: We show a novel higher order polarization-mode dispersion (PMD) mitigation technique for a preamplified system based on narrow optical bandwidth filtering of the signal. Reducing the signal bandwidth results in increased signal immunity against higher order PMD distortions. The method is theoretically explained and experimentally verified.
IEEE Photonics Technology Letters 05/2002; · 2.19 Impact Factor
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ABSTRACT: We have demonstrated that optical narrow bandwidth filtering of RZ signals can reduce pulse distortions that result from higher order PMD. The required filter bandwidth is significantly smaller than conventional filter rules predicted for optimal detection in the case of no PMD. Advantageously, this higher order PMD mitigation method requires no active channel adaptation, only a passive filter.
Optical Fiber Communication Conference and Exhibit, 2002. OFC 2002; 04/2002