Performance of an Inline RZ-DPSK Pulse Compression Using Raman Amplifier and Its Application in OTDM Tributary

Quynh NGUYEN QUANG NHU  Hung NGUYEN TAN  Quang NGUYEN-THE  Motoharu MATSUURA  Naoto KISHI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E99-C   No.2   pp.227-234
Publication Date: 2016/02/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E99.C.227
Type of Manuscript: Special Section PAPER (Special Section on Recent Advances in Photonics Technologies and Their Applications)
Category: 
Keyword: 
fiber optics and optical communication,  optical signal processing,  four-wave mixing,  pulse compression,  Raman amplifier,  pulsewidth tunability,  

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Summary: 
We experimentally investigate the performance of a distributed Raman amplifier (DRA)-based pulse compressor for a phase modulated signal. A 10 Gb/s return-to-zero (RZ)-differential phase shift keying (DPSK) signal is compressed to picosecond range after transmission. Pulsewidth is continuously compressed in a wide range from 20 to 3.2 ps by changing the pump power of the DRA while the compressed waveforms are well-matched with sech2 function. Error-free operations at bit-error-rate (BER) of 10-9 are achieved for the compressed signals of various pulsewidths with low power penalties within 2.3 dB compared to the back-to-back. After the compression, the 10 Gb/s signal is used to generate a 40 Gb/s RZ-DPSK optical time division multiplexing (OTDM) signal. This 40 Gb/s OTDM signal is then successfully demultiplexed to 10 Gb/s DPSK signal by using an optical gate based on four-wave mixing (FWM) in a highly nonlinear fiber (HNLF).