Volume grating preferential-order focusing waveguide coupler

被引：36

作者：

Schultz, SM ^{[1
]}

Glytsis, EN

Gaylord, TK

机构：

[1] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA

[2] Georgia Inst Technol, Microelect Res Ctr, Atlanta, GA 30332 USA

来源：

OPTICS LETTERS | 1999年 / 24卷 / 23期

关键词：

D O I：

10.1364/OL.24.001708

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A volume grating focusing waveguide coupler has been designed, fabricated, and tested. The volume grating is designed to couple a 633-nm wave guided in a single-mode polyimide waveguide preferentially into the air cover. The beam is outcoupled normally to the surface of the waveguide and focused to a line 25 mm above the waveguide. The slanted-fringe volume grating is holographically recorded by the interference of two coherent 364-nm ultraviolet waves focused with a cylindrical lens to produce the chirped grating. The 1-mm-long volume grating coupler exhibits a preferential-coupling ratio of 0.98, a coupling efficiency of 95%, and an almost diffraction-limited focal line with a full width at half-maximum of 10.49 mu m. (C) 1999 Optical Society of America.

引用

页码：1708 / 1710

页数：3

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