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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 27, Iss. 16 — Aug. 15, 1988
  • pp: 3408–3417

Frequency-modulated impulse response photothermal detection through optical reflectance. 2: Experimental

Joan F. Power and Andreas Mandelis  »View Author Affiliations


Applied Optics, Vol. 27, Issue 16, pp. 3408-3417 (1988)
http://dx.doi.org/10.1364/AO.27.003408


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Abstract

A fast thermoreflectance impulse response photothermal imager was assembled and tested with several solid materials [quartz, stainless steel, and polyvinylidene difluoride (PVDF)]. The instrument was found to yield quantitative data in agreement with Green’s function theoretical models of time domain heat conduction. The FM chirp laser intensity modulation technique used in these experiments gave wide bandwidth photothermal signals and was found to be only limited by the FFT instrumentation frequency response (100 kHz). Thermal diffusivities were calculated, while thermal lensing and thermoelastic effects were further observed. The imager was thus shown to be capable of replacing pulsed laser devices for truly nondestructive applications with materials with low damage threshold to optical pulses.

© 1988 Optical Society of America

History
Original Manuscript: December 1, 1987
Published: August 15, 1988

Citation
Joan F. Power and Andreas Mandelis, "Frequency-modulated impulse response photothermal detection through optical reflectance. 2: Experimental," Appl. Opt. 27, 3408-3417 (1988)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-27-16-3408

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