Nonlinearity-compensation-free optical frequency domain reflectometry based on electrically-controlled optical frequency sweep

Q1 Engineering

Journal of Electronic Science and Technology Pub Date : 2021-03-01 DOI:10.1016/j.jnlest.2020.100025

Fan Yang, Ling-Jie Zhang, Zhi-Yao Zhang, Xiao-Jun Zhou, Yong Liu

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引用次数: 3

Abstract

A nonlinearity-compensation-free optical frequency domain reflectometry (OFDR) scheme is proposed and experimentally demonstrated based on the electrically-controlled optical frequency sweep. In the proposed scheme, the linear frequency sweep light is generated by propagating an ultra-narrow-linewidth continuous-wave (CW) light through an electro-optic frequency shifter which consists of a dual-parallel Mach-Zehnder modulator (DPMZM) and an electronic 90° hybrid, where the electro-optic frequency shifter is driven by a linear frequency modulated signal generated by a direct digital synthesizer (DDS). Experimental results show that the spatial resolution and signal-to-noise ratio (SNR) of the proposed OFDR scheme without the nonlinear phase compensation are comparable to those of OFDR employing a commercial tunable laser source (TLS), an auxiliary interferometer, and a software-based nonlinear phase compensation method. The proposed OFDR scheme is helpful to reduce the complexity of the optical structure and eliminate the difficulty of developing the nonlinear phase compensation algorithm.

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基于电控扫频的非线性无补偿光频域反射计

提出了一种基于电控光扫频的非线性无补偿光频域反射方案，并进行了实验验证。在所提出的方案中，线性扫频光是由超窄线宽连续波(CW)光通过由双平行马赫-曾德尔调制器(DPMZM)和电子90°混合器组成的电光移频器产生的，其中电光移频器由直接数字合成器(DDS)产生的线性调频信号驱动。实验结果表明，不进行非线性相位补偿的OFDR方案的空间分辨率和信噪比与采用商用可调谐激光源(TLS)、辅助干涉仪和基于软件的非线性相位补偿方法的OFDR方案相当。提出的OFDR方案有助于降低光学结构的复杂性，消除开发非线性相位补偿算法的困难。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Electronic Science and Technology Engineering-Electrical and Electronic Engineering

CiteScore

4.30

自引率

0.00%

发文量

1362

审稿时长

99 days

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