Condition for the realization of a temperature-insensitive long-period waveguide grating

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)2716-2718
Journal / PublicationOptics Letters
Volume31
Issue number18
Publication statusPublished - 15 Sept 2006

Abstract

We analyze the condition for achieving a temperature-insensitive resonance wavelength of a long-period grating formed in a channel waveguide. We find that by controlling the waveguide cladding thickness, zero temperature sensitivity can be achieved with core and cladding materials that have significantly different thermo-optic coefficients. To verify our finding, we design a polymer long-period waveguide grating (LPWG) according to the zero-sensitivity condition, where the thermo-optic coefficient of the core is twice that of the cladding. The temperature sensitivity of the fabricated grating is within ±0.15nm/°C over a temperature range of ∼15°C, which is more than an order of magnitude lower than those of previously reported LPWGs fabricated with the same materials. © 2006 Optical Society of America.

Citation Format(s)

Condition for the realization of a temperature-insensitive long-period waveguide grating. / Liu, Qing; Chiang, Kin Seng; Lor, Kar Pong.
In: Optics Letters, Vol. 31, No. 18, 15.09.2006, p. 2716-2718.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review