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Proceedings Paper

Polymer long-period waveguide grating with low temperature sensitivity
Author(s): Qing Liu; Kin Seng Chiang; Kar Pong Lor
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Paper Abstract

In this paper, we derive the general condition for the realization of a temperature-insensitive resonance wavelength of a long-period waveguide grating and present numerical examples for gratings formed in polymer channel waveguides. We show that, by controlling the thickness of the waveguide cladding, zero temperature sensitivity can be achieved with core and cladding materials that have significantly different thermo-optic coefficients. To verify our finding, we follow the temperature-insensitivity condition and fabricate a polymer grating with a core material that has a thermo-optic coefficient about twice as that of the cladding material. The temperature sensitivity of the fabricated grating is within ±0.15 nm/°C over a temperature range of ~15°C, which is more than an order of magnitude lower than those of previously reported gratings fabricated with the same materials.

Paper Details

Date Published: 3 October 2006
PDF: 9 pages
Proc. SPIE 6351, Passive Components and Fiber-based Devices III, 63510B (3 October 2006); doi: 10.1117/12.688349
Show Author Affiliations
Qing Liu, City Univ. of Hong Kong (Hong Kong China)
Kin Seng Chiang, City Univ. of Hong Kong (Hong Kong China)
Kar Pong Lor, City Univ. of Hong Kong (Hong Kong China)

Published in SPIE Proceedings Vol. 6351:
Passive Components and Fiber-based Devices III
Sang Bae Lee; Yan Sun; Kun Qiu; Simon C. Fleming; Ian H. White, Editor(s)

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