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

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  • NGUYEN QUANG NHU Quynh
    Department of Communication Engineering and Informatics, The University of Electro-Communications Faculty of Electronic and Telecommunication Engineering, University of Science and Technology, the University of Danang
  • NGUYEN TAN Hung
    National Institute of Advanced Industrial Science and Technology
  • NGUYEN-THE Quang
    Le Quy Don Technical University
  • MATSUURA Motoharu
    Department of Communication Engineering and Informatics, The University of Electro-Communications
  • KISHI Naoto
    Department of Communication Engineering and Informatics, The University of Electro-Communications

抄録

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).

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