Optimizing and calibrating a mode-mismatched thermal lens experiment for low absorption measurement

Journal Article · Sat Jul 15 00:00:00 EDT 2006 · Journal of the Optical Society of America. Part B, Optical Physics

DOI:https://doi.org/10.1364/JOSAB.23.001408· OSTI ID:20768792

Marcano, Aristides; Cabrera, Humberto; Guerra, Mayamaru; Cruz, Renato A; Jacinto, Carlos; Catunda, Tomaz ^[1]

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1. Centro de Fisica, Instituto Venezolano de Investigaciones Cientificas, Apartado 21827, Caracas 1020A, (Venezuela)

We describe a calibrated two-beam mode-mismatched thermal lens experiment aimed at determination of the absorption coefficient and the photothermal parameters of a nearly transparent material. The use of a collimated probe beam in the presence of a focused excitation beam optimizes the thermal lens experiment. The signal becomes independent from the Rayleigh parameters and waist positions of the beams. We apply this method to determine the absolute value of the thermal diffusivity and absorption coefficient of distilled water at 533 nm.

• OSTI ID: 20768792
• Journal Information: Journal of the Optical Society of America. Part B, Optical Physics, Vol. 23, Issue 7; Other Information: DOI: 10.1364/JOSAB.23.001408; (c) 2006 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0740-3224
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
CALIBRATION
EXCITATION
FOCUSING
LENSES
OPACITY
THERMAL DIFFUSIVITY
WATER