Towards compact optical waveguide devices for active infrared applications

被引:0
|
作者
Mairaj, A [1 ]
Curry, R [1 ]
Hughes, M [1 ]
Simpson, R [1 ]
Knight, K [1 ]
Hewak, D [1 ]
机构
[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
来源
INTEGRATED OPTICAL DEVICES, NANOSTRUCTURES, AND DISPLAYS | 2004年 / 5618卷
关键词
infrared; integrated optics; waveguide laser; chalcogenide;
D O I
10.1117/12.578545
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The infrared (IR) spectrum is of significant importance in many defence applications including free-space communication, thermal imaging and chemical sensing. The materials used in these applications must exhibit a number of suitable properties including mid-IR transparency, rare-earth solubility and low optical loss. When moving towards miniaturised optical devices one tends to adopt the concepts introduced by integrated optics; multiple devices operating harmoniously on a single photonic chip. Our work focuses on the use of a laser to directly write into a novel chalcogenide glass to engineer optical waveguide devices. Our material of choice is gallium lanthanurn sulphide (Ga:La:S) glass, an exceptional vitreous chalcogenide material possessing these aforementioned properties as well as a broad range of other properties. These Ga:La:S glasses have a wide transmission window between 0.5 to 10 mum. Furthermore, these low-phonon energy glasses have a high transition temperature (T-g = 560degreesC), high refractive index, the highest reported non-linearity in a glass, excellent rare-earth solubility with well documented near-mid IR spectroscopic properties. We report on low loss single-mode active channel waveguides in Ga:La:S glass engineered through direct laser writing (lambda = 244 nm). We discuss laser operation at 1.075 mum (neodymium) and IR emission at 1.55, 2.02 and 2.74 mum (erbium) from these waveguides.
引用
收藏
页码:48 / 59
页数:12
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