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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 15, Iss. 6 — Jun. 1, 1998
  • pp: 1707–1713

Nonlinear spectroscopy and passive Q-switching operation of Cr4+-doped SrGd4(SiO4)3O and CaGd4(SiO4)3O crystals

K. V. Yumashev, N. N. Posnov, I. A. Denisov, V. P. Mikhailov, and R. Moncorge  »View Author Affiliations


JOSA B, Vol. 15, Issue 6, pp. 1707-1713 (1998)
http://dx.doi.org/10.1364/JOSAB.15.001707


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Abstract

The polarized differential absorption spectra of the Cr4+ ion in Cr4+:SrGd4(SiO4)3O and Cr4+:CaGd4(SiO4)3O crystals were studied under picosecond excitation. Polarized excited-state absorption (ESA) spectra were derived from the differential absorption spectra by use of the ground-state absorption (GSA) and ESA cross sections obtained from intensity-dependent transmission measurements. ESA was assigned to the 3T23T1(3F) and 3T23T1(3P) transitions of the Cr4+ ion. Passive Q switching of a Nd3+:YAlO3 (1.08-μm) and a ruby (694-nm) laser with the Cr4+:SrGd4(SiO4)3O and the Cr4+:CaGd4(SiO4)3O crystals as saturable absorbers was demonstrated. The pulse duration (energy) of the Q-switched Nd3+:YAlO3 and the ruby laser were found to be 55 ns (2.4 mJ) and 90 ns (20 mJ), respectively.

© 1998 Optical Society of America

OCIS Codes
(140.3380) Lasers and laser optics : Laser materials
(140.3540) Lasers and laser optics : Lasers, Q-switched
(300.6420) Spectroscopy : Spectroscopy, nonlinear

Citation
K. V. Yumashev, N. N. Posnov, I. A. Denisov, V. P. Mikhailov, and R. Moncorge, "Nonlinear spectroscopy and passive Q-switching operation of Cr4+-doped SrGd4(SiO4)3O and CaGd4(SiO4)3O crystals," J. Opt. Soc. Am. B 15, 1707-1713 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-6-1707


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