Remote tuneable diode laser spectroscopy (TDLS) via a 1W Raman source

David Mitchell; Kevin Duffin; Walter Johnstone

doi:10.1117/12.820567

18 May 2009 Remote tuneable diode laser spectroscopy (TDLS) via a 1W Raman source

David Mitchell, Kevin Duffin, Walter Johnstone

Proceedings Volume 7356, Optical Sensors 2009; 73560Y (2009) https://doi.org/10.1117/12.820567
Event: SPIE Optics + Optoelectronics, 2009, Prague, Czech Republic

Abstract

We report a long-range near-IR methane sensor for inspection of natural gas collection, storage sites and pipeline networks. The principle is that a laser carrier beam is directed at the target surface across a test path and the backscatter from the surface is detected in a large Fresnel lens on the sensor. A Raman amplifier has been designed to amplify the TDLS optical signal generated by a 1650.95nm DFB laser diode to over 1W CW. Combining the high power output of the Raman amplifier and the highly sensitive TDLS technique, we may report 100ppm.m sensitivity at more than 100m.

Citation Download Citation

David Mitchell, Kevin Duffin, and Walter Johnstone "Remote tuneable diode laser spectroscopy (TDLS) via a 1W Raman source", Proc. SPIE 7356, Optical Sensors 2009, 73560Y (18 May 2009); https://doi.org/10.1117/12.820567

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