Towards a compact optical waveguide device for active infrared applications


Mairaj, Arshad, Curry, Richard, Hughes, Mark, Simpson, Robert, Knight, Kenton and Hewak, Dan (2004) Towards a compact optical waveguide device for active infrared applications. In, SPIE European Symposium on Optics and Photonics for Defence & Security, London, UK, 25 - 28 Oct 2004.

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Description/Abstract

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 lanthanum 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 μm. Furthermore, these low-phonon energy glasses have a high transition temperature (T = 560°C), high refractive index, the highest reported non-linearity in a glass, excellent me-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 (λ = 244 nm). We discuss laser operation at 1.075 μm (neodymium) and IR emission at 1.55, 2.02 and 2.74 μm (erbium) from these waveguides.

Item Type: Conference or Workshop Item (Paper)
Related URLs:
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
U Military Science > U Military Science (General)
Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 41716
Date Deposited: 16 Oct 2006
Last Modified: 27 Mar 2014 18:26
URI: http://eprints.soton.ac.uk/id/eprint/41716

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