Tunable diode laser spectroscopy with electronically controlled background RAM nulling

Abhishek Upadhyay; Vibhav Vikas Katre; Arup Lal Chakraborty

doi:10.1117/12.975190

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7 November 2012 Tunable diode laser spectroscopy with electronically controlled background RAM nulling

Abhishek Upadhyay, Vibhav Vikas Katre, Arup Lal Chakraborty

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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84216H (2012) https://doi.org/10.1117/12.975190
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

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.

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Abhishek Upadhyay, Vibhav Vikas Katre, and Arup Lal Chakraborty "Tunable diode laser spectroscopy with electronically controlled background RAM nulling", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84216H (7 November 2012); https://doi.org/10.1117/12.975190

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