OSNR monitoring technique for DPSK/DQPSK signals based on self-heterodyne detection

被引：6
|
作者：
Choi, H. Y. [1 ]
Takushima, Y. [1 ]
Chung, Y. C. [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Elect Engn, Taejon 305701, South Korea
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2008年 / 20卷 / 13-16期
关键词：
differential phase-shift keying (DPSK); differential quadrature phase-shift keying (DQPSK); optical signal-to-noise ratio (OSNR); self-heterodyne detection;
D O I：
10.1109/LPT.2008.924649
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We describe a new method for monitoring the "in-band" optical signal-to-noise ratio (OSNR) of differential phase-shift-keying (DPSK) and differential quadrature phase-shift-keying (DQPSK) signals. This technique estimates the OSNR by analyzing the radio frequency spectrum obtained by the self-heterodyne detection. The results show that the performance of the proposed technique is not sensitive to the effects of chromatic dispersion and polarization-mode dispersion. In addition, this technique can be used for monitoring the polarization-scrambled signals. For a demonstration, we measure the OSNR of the polarization-scrambled 10-Gb/s DPSK and 20-Gb/s DQPSK signals in a 640-km-long transmission link.
引用
收藏
页码：1124 / 1126
页数：3
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