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All-optical format conversion from non-return-to-zero to return-to-zero based on dual-pump four-wave mixing in photonic crystal fiber

Hui Zhan-Qiang Zhang Jian-Guo

All-optical format conversion from non-return-to-zero to return-to-zero based on dual-pump four-wave mixing in photonic crystal fiber

Hui Zhan-Qiang, Zhang Jian-Guo
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  • Received Date:  01 June 2012
  • Accepted Date:  21 December 2012
  • Published Online:  20 April 2013

All-optical format conversion from non-return-to-zero to return-to-zero based on dual-pump four-wave mixing in photonic crystal fiber

  • 1. School of Electronic Engineering, Xi’an University of Posts and Telecommunications, Xi’an 710121, China;
  • 2. State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China
Fund Project:  Project supported by the Chinese Academy of Sciences/ State Administration of Foreign Experts Affairs (CAS/SAFEA) International Partnership Program for Creative Research Teams and the National Natural Science Foundation of China (Grant No. 61201193).

Abstract: A novel all-optical format conversion scheme based on dual-pump four-wave-mixing (DP-FWM) in dispersion-flattened highly nonlinear photonic crystal fiber (DF-HNL-PCF) is proposed and experimentally demonstrated. The original non-return-to-zero (NRZ) format is converted into double return-to-zero (RZ) format by injecting NRZ signal and double synchronized clock signals into the DF-HNL-PCF. The DP-FWM effect generates two sideband components, which carry the same data information as the original NRZ signal with RZ format. The wavelength tunability and dynamic range of format converter are investigated. The optimum extinct ratio and Q factor of converted signals are 15 dB and 5.4, respectively. The advantages of this scheme are that the each wavelength of double channel multicasting signals is dependent and flexible. Moreover, the system is transparent to bit rate as well as modulation format, and achieves all-optical wavelength conversion and wavelength multicasting.

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