Thermal tuning of hollow waveguides fabricated by controlled thin-film buckling

被引：6
|
作者：
Epp, E. [1 ]
Ponnampalam, N.
McMullin, J. N.
DeCorby, R. G.
机构：
[1] Univ Alberta, ECE Dept, Edmonton, AB T6G 2V4, Canada
来源：
OPTICS EXPRESS | 2009年 / 17卷 / 20期
基金：
加拿大自然科学与工程研究理事会;
关键词：
OPTICAL FILTER; DELAMINATION;
D O I：
10.1364/OE.17.017369
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We describe the thermal tuning of air-core Bragg waveguides, fabricated by controlled formation of delamination buckles within a multilayer stack of chalcogenide glass and polymer. The upper cladding mirror is a flexible membrane comprising high thermal expansion materials, enabling large tuning of the air-core dimensions for small changes in temperature. Measurements on the temperature dependence of feature heights showed good agreement with theoretical predictions. We applied this mechanism to the thermal tuning of modal cutoff conditions in waveguides with a tapered core profile. Due to the omnidirectional nature of the cladding mirrors, these tapers can be viewed as waveguide-coupled, tunable Fabry-Perot filters. (C) 2009 Optical Society of America
引用
收藏
页码：17369 / 17375
页数：7
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