Temperature insensitive refractometer using TE and TM modes in open top ridge waveguides

Xiaoli Dai; Stephen J. Mihailov; Robert Bruce Walker; Claire L. Callender; Chantal Blanchetiere

doi:10.1117/12.778904

26 October 2007 Temperature insensitive refractometer using TE and TM modes in open top ridge waveguides

Xiaoli Dai, Stephen J. Mihailov, Robert Bruce Walker, Claire L. Callender, Chantal Blanchetiere

Proceedings Volume 6796, Photonics North 2007; 679626 (2007) https://doi.org/10.1117/12.778904
Event: Photonics North 2007, 2007, Ottawa, Canada

Abstract

In our previous work, a highly sensitive waveguide Bragg grating (WBG) sensor for measuring small changes in the refractive index of a surrounding liquid was developed [1]. We proposed a technique for creating a temperature insensitive refractometer that utilizes core and cladding modes in an open-top ridge waveguide architecture in order to discriminate between Bragg wavelength changes in temperature and refractive index [2]. In this work, a technique for creating a temperature insensitive refractometer that utilizes TE and TM modes in an open-top ridge waveguide design is presented. By using the TE mode resonance as a temperature reference, the relative shift of the TM mode can be monitored in order to measure the refractive index of liquids under test. Specifically, the device fabricated here produces a relative resonance shift of 1 pm for every 1×10^-4 of measured index change, with a temperature sensitivity less than 0.2 pm/°C.

Citation Download Citation

Xiaoli Dai, Stephen J. Mihailov, Robert Bruce Walker, Claire L. Callender, and Chantal Blanchetiere "Temperature insensitive refractometer using TE and TM modes in open top ridge waveguides", Proc. SPIE 6796, Photonics North 2007, 679626 (26 October 2007); https://doi.org/10.1117/12.778904

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