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Proceedings Paper

Temperature insensitive refractometer using TE and TM modes in open top ridge waveguides
Author(s): Xiaoli Dai; Stephen J. Mihailov; Robert Bruce Walker; Claire L. Callender; Chantal Blanchetiere
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Paper 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.

Paper Details

Date Published: 26 October 2007
PDF: 7 pages
Proc. SPIE 6796, Photonics North 2007, 679626 (26 October 2007); doi: 10.1117/12.778904
Show Author Affiliations
Xiaoli Dai, Communications Research Ctr. Canada (Canada)
Stephen J. Mihailov, Communications Research Ctr. Canada (Canada)
Robert Bruce Walker, Communications Research Ctr. Canada (Canada)
Claire L. Callender, Communications Research Ctr. Canada (Canada)
Chantal Blanchetiere, Communications Research Ctr. Canada (Canada)

Published in SPIE Proceedings Vol. 6796:
Photonics North 2007
John Armitage, Editor(s)

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