New optical detection techniques for chemical sensors

被引：0

作者：

Mendes, SB ^{[1
]}

Honkanen, S ^{[1
]}

Fallahi, M ^{[1
]}

Peyghambarian, N ^{[1
]}

机构：

[1] Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA

来源：

METHODS FOR ULTRASENSITIVE DETECTION | 1998年 / 3270卷

关键词：

sensor; waveguide; integrated optics; evanescent wave; semiconductor laser; optical fiber;

D O I：

10.1117/12.308385

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work we present three novel optical approaches towards the implementation of bio- and chemical sensors. First we describe an absorbance spectroscopic technique developed on a waveguide platform that features a sensitivity enhancement of 4 orders of magnitude compared to the conventional transmission measurements of ultra-thin films. Next we show a waveguide Zeeman interferometric technique, which is based on the relative phase change between the TE and TM waveguide modes, applied as a sensor platform. Finally an external-cavity laser, a semiconductor laser combined with a single mode optical fiber and a Bragg grating reflector, was built to work as an active sensor where the analyte species were incorporated inside the resonant cavity to increase sensitivity.

引用

页码：42 / 49

页数：8