Molecular photonics of a highly nonlinear organic fiber core liquid for picosecond-nanosecond optical limiting application

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

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Recently obtained results of optical limiting studies with picosecond and nanosecond laser pulses in a nonlinear organic fiber core liquid L34 are analyzed with a model that accounts for linear, two-photon, intermediate, and excited-state absorptions. Explicit expressions for the laser induced molecular level density changes, and the nonlinear transmission and optical limiting of picosecond laser pulses are obtained. These theoretical considerations and experimental results enable us to characterize the limiting effectiveness of L34 and several nonlinear fiber core liquids. In particular, the roles played by two-photon, intermediate and excited-state absorptions of picosecond and nanosecond laser pulse pulses through ILC cored fibers and bulk films are thoroughly examined. In the nanosecond time scale, significant contributions from thermal/density effects are detected. Together with new insights into the complex intensity-dependent nonlinear transmission in the liquid fiber cores, we have also demonstrated the feasibility of using such fiber arrays for limiting picosecond and nanosecond laser pulses to below the eye/sensor damage level.

Original languageEnglish (US)
Pages (from-to)517-531
Number of pages15
JournalChemical Physics
Volume245
Issue number1-3
DOIs
StatePublished - Jul 1 1999

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Photonics
Laser pulses
photonics
fibers
Fibers
Liquids
liquids
pulses
lasers
Excited states
Photons
photons
excitation
damage
Lasers
sensors
Sensors

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

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abstract = "Recently obtained results of optical limiting studies with picosecond and nanosecond laser pulses in a nonlinear organic fiber core liquid L34 are analyzed with a model that accounts for linear, two-photon, intermediate, and excited-state absorptions. Explicit expressions for the laser induced molecular level density changes, and the nonlinear transmission and optical limiting of picosecond laser pulses are obtained. These theoretical considerations and experimental results enable us to characterize the limiting effectiveness of L34 and several nonlinear fiber core liquids. In particular, the roles played by two-photon, intermediate and excited-state absorptions of picosecond and nanosecond laser pulse pulses through ILC cored fibers and bulk films are thoroughly examined. In the nanosecond time scale, significant contributions from thermal/density effects are detected. Together with new insights into the complex intensity-dependent nonlinear transmission in the liquid fiber cores, we have also demonstrated the feasibility of using such fiber arrays for limiting picosecond and nanosecond laser pulses to below the eye/sensor damage level.",
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Molecular photonics of a highly nonlinear organic fiber core liquid for picosecond-nanosecond optical limiting application. / Khoo, Iam-choon; Chen, P. H.; Wood, M. V.; Shih, Min Yi.

In: Chemical Physics, Vol. 245, No. 1-3, 01.07.1999, p. 517-531.

Research output: Contribution to journalArticle

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