Measurement of PMD tolerance in 40-Gb/s polarization-multiplexed RZ-DQPSK

被引：22

作者：

Boffi, Pierpaolo ^{[1
,2
]}

Ferrario, Maddalena ^{[2
]}

Marazzi, Lucia ^{[2
]}

Martelli, Paolo ^{[2
]}

Parolari, Paola ^{[2
]}

Righetti, Aldo ^{[2
]}

Siano, Rocco ^{[2
]}

Martinelli, Mario ^{[1
,2
]}

机构：

[1] Politecn Milan, Dept Elect & Informat, I-20133 Milan, Italy

[2] CoreCom, Consortium Res Opt Proc & Switching Milan, I-20133 Milan, Italy

来源：

OPTICS EXPRESS | 2008年 / 16卷 / 17期

关键词：

D O I：

10.1364/OE.16.013398

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally investigate the first-order polarization- mode dispersion (PMD) tolerance of two polarization- multiplexed (POLMUX) RZ-DQPSK signals at overall 40 Gb/s. The polarization demultiplexing is enabled by an automatic endless polarization stabilizer. Time-interleaving the two orthogonally polarized RZ-DQPSK signals minimizes the crosstalk due to the non-ideal polarization stabilization, while it represents the worst-case for the PMD-induced crosstalk. Bit-error rate measurements are performed both in back-to-back and after 25-km standard single-mode fiber. The PMD tolerance is evaluated as a function of the instantaneous differential group delay, introduced by a first-order PMD emulator. 40-Gb/s POLMUX RZ-DQPSK is more sensitive to PMD than single-polarization 20-Gb/s DQPSK, while it is more PMD-tolerant than 40-Gb/s NRZ-OOK. Besides, its chromatic dispersion robustness is similar to the single-polarization 20-Gb/s DQPSK. The combination of POLMUX and DQPSK is therefore very promising in view of transmission systems at high bit-rate. (C) 2008 Optical Society of America.

引用

页码：13398 / 13404

页数：7

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