G.655光纤中的四波混频现象对DWDM传输系统的影响

首次通过搭建实纤传输系统验证和分析了G.655光纤中的四波混频(FWM)现象对密集波分复用(DWDM)传输系统的影响,并总结了当前抑制FWM效应的一些常见方法。文章对超远距离和超大容量的DWDM传输系统的设计以及在对商务合同中的系统配置起到重要的参考作用。     

Enhancement of Optical Coherence Tomography Axial Resolution by spectral Shaping

We propose a new method of changing the spectrum shape to improve the axial resolution of optical coherence tomography(OCT).Theoretical analysis shows that certain spectral shaping can shorten the coherence length.Comparisons of the simulation and experimental measurements of spectral shape shape and axial resolution of OCT are given,shwing that the axial resolution of OCT is enhanced by a factor of 1.4,     

Spectral Shaping in Rapid Scanning Optical Delay Line of Optical Coherence Tomography

A small spatial optical filter is put into the rapid-scanning optical delay line (RSOD) to shape the spectrum of the reference beam in optical coherence tomography (OCT). The experimental results show that the longitudinal resolution can be improved by a factor of 81% with this method, while at the same time, the signal-to-noise ratio of the OCT system is not much affected. This method can be used in OCT systems that use RSOD as the reference arm with a light source of superluminescent diodes, femtosecond lasers and crystal fibre as well.