THERMAL LENSING IN BIOLOGIC MEDIUM.

Massoud Motamedi, Ashley J. Welch, Wai Fung Cheong, Shahriar A. Ghaffari, Oon Tian Tan

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A nonlinear effect for tissue response is reported which results from macroscopic changes in the refractive index of tissue due to its localized heating during laser irradiation. The effect, termed thermal lensing, arises when a high-intensity beam of light interacts with an absorbing medium and highly localized heating occurs. Localized heating causes thermal expansion which leads to a decrease in tissue density, inducing macroscopic spatial gradients in the index of refraction. A description is given of a series of experiments designed and performed to establish the existence of thermal lensing in a biological medium and quantify the effect of exposure parameters and medium properties.

Original languageEnglish (US)
Pages (from-to)693-696
Number of pages4
JournalIEEE Journal of Quantum Electronics
Volume24
Issue number4
DOIs
StatePublished - Apr 1988
Externally publishedYes

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thermal lensing
Tissue
Heating
heating
laser heating
Laser beam effects
Refraction
Thermal effects
Thermal expansion
refraction
thermal expansion
Refractive index
refractivity
gradients
irradiation
causes
Hot Temperature
Experiments

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Motamedi, M., Welch, A. J., Cheong, W. F., Ghaffari, S. A., & Tan, O. T. (1988). THERMAL LENSING IN BIOLOGIC MEDIUM. IEEE Journal of Quantum Electronics, 24(4), 693-696. https://doi.org/10.1109/3.180

THERMAL LENSING IN BIOLOGIC MEDIUM. / Motamedi, Massoud; Welch, Ashley J.; Cheong, Wai Fung; Ghaffari, Shahriar A.; Tan, Oon Tian.

In: IEEE Journal of Quantum Electronics, Vol. 24, No. 4, 04.1988, p. 693-696.

Research output: Contribution to journalArticle

Motamedi, M, Welch, AJ, Cheong, WF, Ghaffari, SA & Tan, OT 1988, 'THERMAL LENSING IN BIOLOGIC MEDIUM.', IEEE Journal of Quantum Electronics, vol. 24, no. 4, pp. 693-696. https://doi.org/10.1109/3.180
Motamedi, Massoud ; Welch, Ashley J. ; Cheong, Wai Fung ; Ghaffari, Shahriar A. ; Tan, Oon Tian. / THERMAL LENSING IN BIOLOGIC MEDIUM. In: IEEE Journal of Quantum Electronics. 1988 ; Vol. 24, No. 4. pp. 693-696.
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