Nonlinear absorption and optical limiting of laser pulses in a liquid-cored fiber array

Iam-choon Khoo, M. V. Wood, B. D. Guenther, Min Yi Shih, P. H. Chen

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Recently observed nonlinear-propagation and optical-limiting effects of nanosecond and picosecond laser pulses through a fiber are analyzed with a model that accounts for various molecular photonic-absorption processes including linear, two-photon, intermediate, and excited-state absorptions. Explicit expressions for the laser-induced molecular-level density changes, the thermal-density effects following photoabsorption, and their effects on the laser propagation transmission are obtained for conditions corresponding to the experimental situations. These theoretical considerations are found to correlate very well with experimental results for the transmission of picosecond and nanosecond laser pulses through the nonlinear fiber. Our analyses show that in the picosecond regime, nonlinear photonic absorptions are efficient optical-limiting processes, whereas in the nanosecond regime, thermal-density effects are the dominant contributor. We also identify a particular nonlinear core liquid that gives very low optical-limiting thresholds and clamped transmission for picosecond as well as nanosecond laser pulses.

Original languageEnglish (US)
Pages (from-to)1533-1540
Number of pages8
JournalJournal of the Optical Society of America B: Optical Physics
Volume15
Issue number5
DOIs
StatePublished - Jan 1 1998

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fibers
liquids
pulses
lasers
photonics
propagation
photoabsorption
thresholds
photons
excitation

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Khoo, Iam-choon ; Wood, M. V. ; Guenther, B. D. ; Shih, Min Yi ; Chen, P. H. / Nonlinear absorption and optical limiting of laser pulses in a liquid-cored fiber array. In: Journal of the Optical Society of America B: Optical Physics. 1998 ; Vol. 15, No. 5. pp. 1533-1540.
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Nonlinear absorption and optical limiting of laser pulses in a liquid-cored fiber array. / Khoo, Iam-choon; Wood, M. V.; Guenther, B. D.; Shih, Min Yi; Chen, P. H.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 15, No. 5, 01.01.1998, p. 1533-1540.

Research output: Contribution to journalArticle

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AU - Khoo, Iam-choon

AU - Wood, M. V.

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AU - Chen, P. H.

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