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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry Van Driel
  • Vol. 26, Iss. 8 — Aug. 1, 2009
  • pp: 1627–1634

Noncollinear optical parametric amplifier based femtosecond time-resolved transient fluorescence spectra: characterization and correction

Hailong Chen, Yuxiang Weng, and Jingyuan Zhang  »View Author Affiliations


JOSA B, Vol. 26, Issue 8, pp. 1627-1634 (2009)
http://dx.doi.org/10.1364/JOSAB.26.001627


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Abstract

Spectral distortion frequently occurs in a recently developed femtosecond time-resolved fluorescence spectroscopy based on noncollinear optical parametric amplification, which would limit its applications if it is not treated appropriately. We report the mechanism for broadening and distortion of the amplified spectrum, and it was found that the amplified fluorescence spectral width and the corresponding pulse duration were limited by the uncertainty principle. We demonstrated that the nonuniform gain curve of nonlinear optical crystal in the wide spectral region is the main cause leading to the distorted spectrum. Theoretical analysis shows that by carefully adjusting the experimental parameters, such as propagation and noncollinear angles, the spectral fidelity can be achieved in a broad region. Moreover, we also proposed a method for retrieving the genuine spectrum from the distorted amplified spectrum by experimentally measuring the gain curve encoded in the spectrum of the parametric superfluorescence, which is collected during propagation at noncollinear angles the same as those for amplified fluorescence.

© 2009 Optical Society of America

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(300.6500) Spectroscopy : Spectroscopy, time-resolved

ToC Category:
Spectroscopy

History
Original Manuscript: April 10, 2009
Revised Manuscript: June 26, 2009
Manuscript Accepted: June 26, 2009
Published: July 27, 2009

Citation
Hailong Chen, Yuxiang Weng, and Jingyuan Zhang, "Noncollinear optical parametric amplifier based femtosecond time-resolved transient fluorescence spectra: characterization and correction," J. Opt. Soc. Am. B 26, 1627-1634 (2009)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-26-8-1627

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