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Proceedings Paper

Comparison of sensitivity of optical waveguide chemical sensors between TM and TE modes
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Paper Abstract

To investigate the dependence of the sensitivity of optical waveguide sensors on the polarization of guided modes, we have analyzed their absorption coefficients for both TE and TM modes by group index method [D.-K. Qing, X-. M. Chen, K. Itoh, M. Murabayashi: J. Lightwave Technol. 14, pp. 1907-1917, 1996]. As field distributions of TE and TM modes are different, the absorption coefficient for TE and TM modes are different. For open clad type evanescent wave sensors, whose mode is more favorable depends on whether the refractive index of the measurand is lower or higher than that of the substrate; for buffered clad type evanescent wave sensors, This depends on the role of the buffer layer; for sensing layer type evanescent wave sensors, TE mode has larger sensitivity than TM mode; for guided wave sensors, both TE and TM mode are suitable for highly sensitive sensors.

Paper Details

Date Published: 7 May 1999
PDF: 4 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347731
Show Author Affiliations
DeKui Qing, RIKEN--The Institute of Physical and Chemical Research (Japan)
Ichirou Yamaguchi, RIKEN--The Institute of Physical and Chemical Research (Japan)


Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

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