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Optics Letters

Optics Letters

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  • Vol. 20, Iss. 14 — Jul. 15, 1995
  • pp: 1524–1526

Three-photon-absorption-induced fluorescence and optical limiting effects in an organic compound

Guang S. He, Jayant D. Bhawalkar, Paras N. Prasad, and Bruce A. Reinhardt  »View Author Affiliations


Optics Letters, Vol. 20, Issue 14, pp. 1524-1526 (1995)
http://dx.doi.org/10.1364/OL.20.001524


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Abstract

Three-photon-absorption-induced frequency-upconversion fluorescence emission has been observed in a solution of 2,5-benzothiazole 3,4-didecyloxy thiophene (BBTDOT) in tetrahydrofuran, pumped with 10-ns Q-switched 1.06-μm laser pulses. The spectral peak of the observed fluorescence emission is located in the 450–480-nm range, and the intensity dependence of the visible emission on the IR excitation obeys the cubic law. At a higher solute concentration (0.18 M/L) and moderate IR excitation intensity levels (50–200 MW/cm2), obvious optical limiting behavior has been observed as a result of three-photon absorption. The measured nonlinear absorption coefficient and the corresponding molecular three-photon-absorption cross section are γ = 2.7 × 10−18 cm3/W2 and σ 3 = 8.8 × 10 - 76 cm 6 s 2, respectively.

© 1995 Optical Society of America

History
Original Manuscript: March 7, 1995
Published: July 15, 1995

Citation
Guang S. He, Bruce A. Reinhardt, Jayant D. Bhawalkar, and Paras N. Prasad, "Three-photon-absorption-induced fluorescence and optical limiting effects in an organic compound," Opt. Lett. 20, 1524-1526 (1995)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-20-14-1524

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