In this paper, we report a novel method for accurately measuring the photo-induced birefringence of photosensitive fiber by using Mach-Zehnder interferometer. The results indicate that the normalized birefringence can...In this paper, we report a novel method for accurately measuring the photo-induced birefringence of photosensitive fiber by using Mach-Zehnder interferometer. The results indicate that the normalized birefringence can attain 10-5.展开更多
In this paper we studal the UV-induced refractive index changes of a boron-codoped germanosilicatepreform usedfor foe fabrication of fiber gratings by use Of the color-center model. Two groups of performs, non H2loade...In this paper we studal the UV-induced refractive index changes of a boron-codoped germanosilicatepreform usedfor foe fabrication of fiber gratings by use Of the color-center model. Two groups of performs, non H2loadedpreform and H2, loadedpreform, are exposed to UV beam of various pulse energy densities and pulse numbers.and their UV-induced excess losses are meosured. The corresponding refractive-index changes are determinedthrough a Kramers-Kroning analysis. Also, our experimental results are discussed and onalyzed according to thecolor-center model of photosensitivity and then some important conclusions are obtained.展开更多
基金Supported by the National "863" high technology project(2002AA313110)
文摘In this paper, we report a novel method for accurately measuring the photo-induced birefringence of photosensitive fiber by using Mach-Zehnder interferometer. The results indicate that the normalized birefringence can attain 10-5.
文摘In this paper we studal the UV-induced refractive index changes of a boron-codoped germanosilicatepreform usedfor foe fabrication of fiber gratings by use Of the color-center model. Two groups of performs, non H2loadedpreform and H2, loadedpreform, are exposed to UV beam of various pulse energy densities and pulse numbers.and their UV-induced excess losses are meosured. The corresponding refractive-index changes are determinedthrough a Kramers-Kroning analysis. Also, our experimental results are discussed and onalyzed according to thecolor-center model of photosensitivity and then some important conclusions are obtained.
