Abstract
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.
Original language | English (US) |
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Pages (from-to) | 42-49 |
Number of pages | 8 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 3270 |
DOIs | |
State | Published - 1998 |
Event | Methods for Ultrasensitive Detection - San Jose, CA, United States Duration: Jan 26 1998 → Jan 28 1998 |
Keywords
- Evanescent wave
- Integrated optics
- Optical fiber
- Semiconductor laser
- Sensor
- Waveguide
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering