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Applied Optics

Applied Optics


  • Vol. 27, Iss. 22 — Nov. 15, 1988
  • pp: 4701–4711

Photothermal lensing spectroscopy in a flowing medium: theory

Reeta Vyas and R. Gupta  »View Author Affiliations

Applied Optics, Vol. 27, Issue 22, pp. 4701-4711 (1988)

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A complete and general theoretical description of dual-beam photothermal lensing spectroscopy is given. The results are valid for the most general conditions, that is, for flowing as well as stationary media, and for cw as well as pulsed excitation. For pulsed excitation, the results are valid for arbitrary pulse length. The cw results apply to both modulated as well as unmodulated excitation. Both transverse and collinear geometries are considered.

© 1988 Optical Society of America

Original Manuscript: June 6, 1988
Published: November 15, 1988

Reeta Vyas and R. Gupta, "Photothermal lensing spectroscopy in a flowing medium: theory," Appl. Opt. 27, 4701-4711 (1988)

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  1. R. Gupta, “Theory of Photothermal Effect in Fluids,” in Photothermal Investigations of Solids and Fluids, J. A. Sell, Ed. (Academic, New York, 1988).
  2. H. L. Fang, R. L. Swofford, “The Thermal Lens in Absorption Spectroscopy,” in Ultrasensitive Laser Spectroscopy, D. S. Kliger, Ed. (Academic, New York, 1983).
  3. W. A. Weimer, N. J. Dovichi, “Time-Resolved Crossed-Beam Thermal Lens Measurements as a Noninstrusive Probe of Flow Velocity,” Appl. Opt. 24, 2981 (1985). [CrossRef] [PubMed]
  4. J. P. Gordon, R. C. C. Leite, R. S. Moore, S. P. S. Porto, J. R. Whinnery, “Long-Transient Effects in Lasers with Inserted Liquid Samples,” J. Appl. Phys. 36, 3 (1965). [CrossRef]
  5. C. Hu, J. R. Whinnery, “New Thermooptical Measurement Method and A Comparison with Other Methods,” Appl. Opt. 12, 72 (1973). [CrossRef] [PubMed]
  6. F. R. Grabiner, D. R. Siebert, G. W. Flynn, “Laser Induced Time-Dependent Thermal Lensing Studies of Vibrational Relaxation: Translational Cooling in CH3F,” Chem. Phys. Lett. 17, 189 (1972). [CrossRef]
  7. A. J. Twarowski, D. S. Kliger, “Multiphoton Absorption Spectra Using Thermal Blooming. I. Theory,” Chem. Phys. 20, 253 (1977). [CrossRef]
  8. R. L. Swofford, J. A. Morrell, “Analysis of the Repetitively Pulsed Dual-Beam Thermooptical Absorption Spectrometer,” J. Appl. Phys. 49, 366 (1978). [CrossRef]
  9. H. L. Fang, R. L. Swofford, “Analysis of the Thermal Lensing Effect for an Optically Thick Sample—A Revised Model,” J. Appl. Phys. 50, 6609 (1979). [CrossRef]
  10. N. J. Dovichi, T. G. Nolan, W. A. Weimer, “Theory of Laser-Induced Photothermal Refraction,” Anal. Chem. 56, 1700 (1984). [CrossRef]
  11. W. A. Weimer, N. J. Dovichi, “Time-Resolved Thermal Lens Measurements in Flowing Samples,” Anal. Chem. 57, 2436 (1985). [CrossRef]
  12. S. E. Bialkowski, “Photothermal Lens Aberration Effects in Two Laser Thermal Lens Spectrophotometry,” Appl. Opt. 24, 2792 (1985). [CrossRef] [PubMed]
  13. J. M. Harris, N. J. Dovichi, “Thermal Lens Calorimetry,” Anal. Chem. 52, 695A (1980). [CrossRef]
  14. S. E. Bialkowski, “Pulsed Laser Photothermal Spectroscopy,” Spectroscopy 1, 26 (1986).
  15. A. Rose, R. Vyas, R. Gupta, “Pulsed Photothermal Deflection Spectroscopy in a Flowing Medium: A Quantitative Investigation,” Appl. Opt. 25, 4626 (1986). [CrossRef] [PubMed]
  16. See, for example, A. K. Ghatak, K. Thyagarajan, Contemporary Optics (Plenum, New York, 1978). [CrossRef]
  17. A. Yariv, Introduction to Optical Electronics (Holt, Rinehart & Winston, New York, 1976).

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