Simultaneous 3R Regeneration of 4 <formula formulatype="inline"><tex Notation="TeX">$\times$</tex> </formula> 40-Gbit/s WDM Signals in a Single Fiber

• Main Authors: Ju Wang, Jinlong Yu, Tianhui Meng, Wang Miao, Bin Sun, Wenrui Wang, Enze Yang
• Format: Article
• Language: English
• Published: IEEE 2012-01-01
• Series: IEEE Photonics Journal
• Subjects: Multiwavelength all-optical 3R regeneration; four-wave mixing (FWM); all-optical signal processing; optical communication
• Online Access: https://ieeexplore.ieee.org/document/6290333/
• ISSN: 1943-0655

We experimentally demonstrate simultaneous 3R regeneration of 4 <formula formulatype="inline"><tex Notation="TeX">$\times$ </tex></formula> 40-Gbit/s WDM channels, which is based on the four-wave mixing (FWM) in a single dispersion-shifted fiber. The multichannel 3R regeneration performance is validated by bit-error rate (BER) measurements. Receiver powers at a BER of <formula formulatype="inline"><tex Notation="TeX">$10^{-9}$</tex></formula> are improved by 5.2 dB, 4.8 dB, 3.3 dB, and 3.9 dB for the four WDM channels, respectively. Mitigation of the interchannel nonlinearities is achieved mainly through an interchannel 0.5-bit slot time delay, which is introduced by differential group delay. Bidirectional propagation and polarization multiplexing are also applied to relieve the interchannel FWM.