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Proceedings Paper

Tunable diode laser spectroscopy with electronically controlled background RAM nulling
Author(s): Abhishek Upadhyay; Vibhav Vikas Katre; Arup Lal Chakraborty
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Paper Abstract

An electronically-controlled fibre-optic RAM nulling method is presented for tunable diode laser spectroscopy (TDLS) of gases. An electronic variable optical attenuator and a 1x2 optical switch are used to demonstrate the cancellation of the background RAM signal that limits the detection sensitivity in 1f WMS. This is an significant improvement upon the generic RAM nulling method that has recently been shown to be well suited to direct recovery of the absolute gas absorption line shapes of gases that commonly encountered in process control applications.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84216H (7 November 2012); doi: 10.1117/12.975190
Show Author Affiliations
Abhishek Upadhyay, Indian Institute of Technology Gandhinagar (India)
Vibhav Vikas Katre, Indian Institute of Technology Gandhinagar (India)
Arup Lal Chakraborty, Indian Institute of Technology Gandhinagar (India)


Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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