Widely tunable long-period waveguide grating couplers

被引：38
|
作者：
Bai, Y. [1 ]
Liu, Q. [1 ]
Lor, K. P. [1 ]
Chiang, K. S. [1 ]
机构：
[1] City Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China
来源：
OPTICS EXPRESS | 2006年 / 14卷 / 26期
关键词：
D O I：
10.1364/OE.14.012644
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate experimentally two widely tunable optical couplers formed with parallel long-period polymer waveguide gratings. One of the couplers consists of two parallel gratings and shows a peak coupling efficiency of similar to 34%. The resonance wavelength of the coupler can be tuned thermally with a sensitivity of 4.7 nm/degrees C. The experimental results agree well with the coupled-mode analysis. The other coupler consists of an array of ten widely separated gratings. A peak coupling efficiency of similar to 11% is obtained between the two best matched gratings in the array and the resonance wavelength can be tuned thermally with a sensitivity of -3.8 nm/degrees C. These couplers have the potential to be further developed into practical broadband add/drop multiplexers and signal dividers. (C) 2006 Optical Society of America.
引用
收藏
页码：12644 / 12654
页数：11
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