用于差分相移键控（DPSK）信号解调的基于光子晶体光纤的马赫-曾德尔干涉仪。

Photonic crystal fiber based Mach-Zehnder interferometer for DPSK signal demodulation.

作者信息

Du Jiangbing, Dai Yongheng, Lei Gordon K P, Tong Weijun, Shu Chester

机构信息

Department of Electronic Engineering and Center for Advanced Research in Photonics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong.

出版信息

Opt Express. 2010 Apr 12;18(8):7917-22. doi: 10.1364/OE.18.007917.

DOI:10.1364/OE.18.007917

PMID:20588634

Abstract

We demonstrate a novel fiber-based in-line DPSK demodulator using an in-fiber Mach-Zehnder interferometer (MZI). The device is fabricated by mismatch splicing of a photonic crystal fiber (PCF) with standard single mode fibers. The spectral characteristics at different PCF lengths are analyzed. The envelope of the interference fringes show a period that is inversely proportional to the PCF length, and is attributed to the periodic coupling between the core mode and the cladding mode. Error free demodulations of 10-Gb/s RZ- and NRZ-DPSK signals have been demonstrated using the in-fiber PCF-MZI demodulator with only 3-m PCF to introduce 91-ps delay. Wideband DPSK demodulation has also been achieved.

摘要

我们展示了一种使用光纤马赫-曾德尔干涉仪（MZI）的新型基于光纤的在线差分相移键控（DPSK）解调器。该器件通过光子晶体光纤（PCF）与标准单模光纤的失配熔接制成。分析了不同PCF长度下的光谱特性。干涉条纹的包络显示出一个与PCF长度成反比的周期，这归因于纤芯模式与包层模式之间的周期性耦合。使用仅3米长的PCF来引入91皮秒延迟的光纤PCF-MZI解调器，已实现了10 Gb/s归零（RZ）和非归零（NRZ）DPSK信号的无差错解调。还实现了宽带DPSK解调。