通信工程文献翻译——一个简单、高效的连续可调波长转换器，支持任意输入和输出波长。据报道，转换效率高于25dB / 30nm,由于色散递减高度非线性光纤受激布里渊散射(SBS)抑制了分布式应变。

简介: 波长转换将在不远的未来光网络发挥着重要的作用。单级泵的四波混频是很有前途的,因为它简单的设置和格式无关的特性。做出这样的设备非常有吸引力,因为大信号可调谐性以及高转换效率是至关重要的。一个严重的限制因素是受激布里渊散射(SBS)。为了抑制SBS,几种方法如今已被报导了:基于核心半径信息变化的方法,掺杂浓度或应力沿纤维以及使用相位调制泵激光器的方法也被提出了。

这篇文章讲述了一个在30 nm任意输入和输出波长的完全可调波长转换器，通过使用一个高度非线性色散递减光纤，它应用分布式应变去抑制SBS(HNL-DDF-SD)。我们考虑的波长转换在文章中包括两个步骤,每个步骤都使用HNL-DDF-SD。在第一步中,输入波长转换为一个中间波长。 然后第二步，中间波长转化为输出波长。这样一个级联方案使真正可调波长转换消除了输入和输出波长之间的保护带,如果每一步是简单且转换效率高的话这将非常实用。事实上，只有通过抑制SBS的高度非线性纤维才能获得转换效率高于25 dB并且没有抖动的泵。

波长转换实验:  第一阶段的实验装置见图1。泵和探针是连续波。一个掺铒光纤放大器(EDFA)放大了泵。 泵的极性和探测器的校准和输入都是通过使用单模耦合宽带耦合器、然后发射到非线性纤维中。非线性纤维是一种HNL-DDF-SD,它的特点在表1中已经给出了。 转换后的输出信号在HNL-DDF-SD中衰减,然后由光学频谱分析仪......

A simple and efficient continuously tunable wavelength converter for any arbitrary input and output wavelengths is presented. Conversion efficiency higher than 25 dB over 30 nm, owing to a dispersion-decreasing highly nonlinear fiber with stimulated Brillouin scattering (SBS) suppressed by distributed strain, is reported.

Introduction：Wavelength conversion will play an important role in near-future optical networks. Single pump four-wave mixing in fiber is promising because of its simple setup and format agnostic nature. To make such a device practically attractive, large signal tunability as well as high conversion efficiency is critical. One of the severe limiting factors is the stimulated Brillouin scattering (SBS). To suppress SBS, several methods have been reported so far: methods based on the vari-ation of the core radius , the doping concentration or the stress along the fiber as well as the use of phase modulation in the pump laserhave been proposed.

This Letter presents a fully tunable wavelength converter over 30 nm for any arbitrary input and output wavelengths by using a highly non-linear dispersion-decreasing fiber on which a distributed strain has been applied to suppress SBS (HNL-DDF-SD).The wavelength conver-sion we consider in this Letter comprises two steps, each step .......