Design of planar optic sensors for hydrocarbon detection

DOrazio  A; Desario  M; Giasi  CMescia  LPetruzzelli  VPrudenzano  F

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Design of planar optic sensors for hydrocarbon detection

机译：Design of planar optic sensors for hydrocarbon detection

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摘要

A realistic design of evanescent field optical sensors, constituted by three different kinds of planar waveguides covered by a sensing polymeric overlay, is performed. More precisely, the slab, the embedded strip and the ridge waveguides are considered. The sensor operation is simulated, in both the cases of lossy guided and leaky mode propagation, via a home made computer code. The optimal waveguide transverse section and length are identified, the advantages and drawbacks are shown. The ridge waveguide sensor exhibits appreciable characteristics: for a concentration C-w = 200 ppm of toluene in water, the absorbance pertaining to a device L = 2.6 cm long and for the guided quasi-TEinfinity mode is A congruent to 5, while it is A congruent to 0.054 for a device long L congruent to 24.1 mum and the leaky quasi-TE10 mode. The simulation results suggest that a selective excitation of the suitable propagation mode can enhance the sensor performance.

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来源
《Optical and Quantum Electronics》 |2004年第6期|507-526|共20页
作者
DOrazio A; Desario M; Giasi CMescia LPetruzzelli VPrudenzano F;
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作者单位

Politecn Bari, Dipartimento Elettrotecn & Elettron, I-70125 Bari, Italy;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类光学;
关键词
integrated optics; leaky wave propagation; optical sensors; optical waveguides; CASCADED 2ND-ORDER NONLINEARITY; WAVE-GUIDES; EVANESCENT-FIELD; PROPAGATION MODES; CHEMICAL SENSORS; SENSITIVITY; ABSORPTION; EXCITATION;

Design of planar optic sensors for hydrocarbon detection

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