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NOLM and NALM based optical threshoders for interference suppression in optical code division multiplexing system

X. CHEN1,* , Z. WANG1, X. YUAN2

Affiliation

  1. College of Science, China Three Gorges University, Yichang, Hubei, P.R.China 443002
  2. Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology, Wuhan, Hubei, P.R.China 430074

Abstract

Optical thresholders based on nonlinear optical loop mirror (NOLM) and nonlinear amplifying loop mirror (NALM) for interference suppression in optical code division multiplexing (OCDM) system are evaluated. The ratios of auto-correlation peak to the maximum wing level (P/W) and cross-correlation level (P/C) were used to quantitatively measure the interference suppression characteristic of the optical thresholders. The theoretical simulations show that system performance could be improve apparently by NOLM or NALM based on high nonlinear fiber (HNLF), and the results are validate by the corresponding experimental investigation in the 40 Gbit/s OCDM system.

Keywords

optical thresholder, nonlinear optical loop mirror (NOLM), nonlinear amplifying loop mirror (NALM), high nonlinear fiber (HNLF), optical code division multiplexing (OCDM).

Citation

X. CHEN, Z. WANG, X. YUAN, NOLM and NALM based optical threshoders for interference suppression in optical code division multiplexing system, Optoelectronics and Advanced Materials - Rapid Communications, 3, 10, October 2009, pp.978-981 (2009).

Submitted at: Aug. 27, 2009

Accepted at: Oct. 2, 2009