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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 9 — Sep. 1, 1999
  • pp: 1359–1369

Analysis of the sensitivity of optical waveguide chemical sensors for TM modes by the group-index method

De-Kui Qing and Ichirou Yamaguchi  »View Author Affiliations


JOSA B, Vol. 16, Issue 9, pp. 1359-1369 (1999)
http://dx.doi.org/10.1364/JOSAB.16.001359


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Abstract

The sensitivity of optical waveguide chemical sensors for TM modes is investigated by use of the group-index method [J. Lightwave Technol. 14, 1907 (1996)]. We compare the absorption coefficients of TM modes with those of TE modes to determine in which mode the sensor should work. For open-clad-type evanescent-wave sensors, which mode is more favorable depends on whether the refractive index of the measurand is smaller or larger than that of the substrate; for buffered-clad-type evanescent-wave sensors, the choice depends on the function of the buffer layer; for sensing-layer-type evanescent-wave sensors, the TE mode has greater sensitivity than the TM mode; and for guided-wave sensors, both TE and TM modes are suitable for use in highly sensitive sensors.

© 1999 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(130.6010) Integrated optics : Sensors
(300.1030) Spectroscopy : Absorption

Citation
De-Kui Qing and Ichirou Yamaguchi, "Analysis of the sensitivity of optical waveguide chemical sensors for TM modes by the group-index method," J. Opt. Soc. Am. B 16, 1359-1369 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-9-1359

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