Use of diffuse reflections in tunable diode laser absorption spectroscopy:
implications of laser speckle for gas absorption measurements

Masiyano, Dackson; Hodgkinson, Jane; Tatam, Ralph P.

dc.contributor.author	Masiyano, Dackson	-
dc.contributor.author	Hodgkinson, Jane	-
dc.contributor.author	Tatam, Ralph P.	-
dc.date.accessioned	2011-04-14T23:23:55Z
dc.date.available	2011-04-14T23:23:55Z
dc.date.issued	2008-01-01T00:00:00Z	-
dc.identifier.citation	D Masiyano, J Hodgkinson and, R P Tatam, Use of diffuse reflections in tunable diode laser absorption spectroscopy: implications of laser speckle for gas absorption measurements, Applied Physics B 90, 279-288, 2008. Special issue, 6th International Conference on Tunable Diode Laser Spectroscopy (TDLS-07), Reims, France, 2007	en_UK
dc.identifier.issn	0946-2171	-
dc.identifier.uri	http://dx.doi.org/10.1007/s00340-007-2896-z	-
dc.identifier.uri	http://dspace.lib.cranfield.ac.uk/handle/1826/3568
dc.description.abstract	Abstract We report the effects of self-mixing interference on gas detection using tunable diode laser spectroscopy. For very weak feedback, the laser diode output intensity gains a sinusoidal modulation analogous to that caused by low finesse etalons in the optical path. Our experiments show that self-mixing interference can arise from both specular reflections (e.g. cell windows) and diffuse reflections (e.g. Spectralon™ and retroreflective tape), potentially in a wider range of circumstances than etalon-induced interference. The form and magnitude of the modulation is shown to agree with theory. We have quantified the effect of these spurious signals on methane detection using wavelength modulation spectroscopy and discuss the implications for real gas detector	en_UK
dc.language.iso	en_UK	en_UK
dc.publisher	Springer Science Business Media	en_UK
dc.title	Use of diffuse reflections in tunable diode laser absorption spectroscopy: implications of laser speckle for gas absorption measurements	en_UK
dc.type	Article	en_UK