UV INDUCED DENSIFICATION DURING BRAGG GRATING INSCRIPTION IN GE-SIO2 PREFORMS - INTERFEROMETRIC MICROSCOPY INVESTIGATIONS

被引：30

作者：

POUMELLEC, B

RIANT, I

NIAY, P

BERNAGE, P

BAYON, JF

机构：

[1] ALCATEL ALSTHOM RECH,UFP,F-91460 MARCOUSSIS,FRANCE

[2] UNIV SCI & TECH LILLE FLANDRES ARTOIS,LDMP LAB,CNRS,URA 779,F-59655 VILLENEUVE DASCQ,FRANCE

[3] CTR NATL ETUD TELECOMMUN,FOG,OCM,LAB,F-22301 LANNION,FRANCE

来源：

OPTICAL MATERIALS | 1995年 / 4卷 / 2-3期

关键词：

D O I：

10.1016/0925-3467(94)00109-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The only investigation of Bragg grating in Ge: SiO2 in the direct space known at this date is a view from an optical microscope. Here, we show surface level modulations associated with writing of grating. Our conclusion is that a densification takes place which corresponds to a refractive index increase. Compared to the refractive index change obtained by optical measurement, this accounts for a non-negligible part (7%).

引用

页码：404 / 409

页数：6

共 14 条

[1] PHOTOINDUCED REFRACTIVE-INDEX CHANGES IN GERMANOSILICATE FIBERS [J].