Graded-index diffractive structures fabricated by thermal ion exchange

被引:14
作者
Salmio, RP
Saarinen, J
Turunen, J
Tervonen, A
机构
[1] UNIV JOENSUU,DEPT PHYS,FIN-80101 JOENSUU,FINLAND
[2] OPTONEX LTD,FIN-02101 ESPOO,FINLAND
来源
APPLIED OPTICS | 1997年 / 36卷 / 10期
关键词
diffractive optical elements; gradient-index devices; ion exchange in glass;
D O I
10.1364/AO.36.002048
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
High-efficiency diffractive elements with a continuous phase-modulation capability can be realized either by means of a surface profile or a refractive-index distribution. We consider the latter approach, expanding on our recent proposal [Appl. Phys. Lett. 66, 917 (1995)] to fabricate graded-index diffractive structures by thermal ion exchange in glass. A rapid approximate method is developed to obtain a predesign of the ion-exchange mask, which is then refined by parametric optimization based on solutions of the full diffusion problem. The use of two consecutive ion-exchange steps and postbaking to enhance the designs is investigated, and some experimental results are provided. (C) 1997 Optical Society of America.
引用
收藏
页码:2048 / 2057
页数:10
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