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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 16, Iss. 12 — Dec. 1, 1999
  • pp: 2189–2194

Nonlinear spectroscopy and passive Q-switching operation of a Co2+ :LaMgAl11O19 crystal

K. V. Yumashev, I. A. Denisov, N. N. Posnov, V. P. Mikhailov, R. Moncorgé, D. Vivien, B. Ferrand, and Y. Guyot  »View Author Affiliations


JOSA B, Vol. 16, Issue 12, pp. 2189-2194 (1999)
http://dx.doi.org/10.1364/JOSAB.16.002189


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Abstract

A pump–probe technique with picosecond resolution was used to record and derive the differential and excited-state absorption (ESA) spectra of a Co2+:LaMgAl11O19 (LMA) single crystal in the visible and near-infrared spectral regions. Time resolution allowed us to observe ESA bands that can be assigned to a 4T2(4F)→ 4T1(4P) optical transition and to transitions from the thermally populated 2E(2G) excited state to doublet levels that arise from the 2F free-ion level of the tetrahedrally coordinated Co2+ ion. Intensity-dependent transmission measurements were also carried out at 1.34 and 1.54 µm. Passive Q switching of Nd3+:YAlO3 (1.34-µm) and of Er3+:glass (1.54-µm) lasers by use of the Co2+:LMA crystal as a saturable absorber was demonstrated. The pulse durations (energies) of the Q-switched Nd3+:YAlO3 and Er3+:glass lasers were found to be 75 ns (3.8 mJ) and 50 ns (4.5 mJ), respectively.

© 1999 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, I. A. Denisov, N. N. Posnov, V. P. Mikhailov, R. Moncorgé, D. Vivien, B. Ferrand, and Y. Guyot, "Nonlinear spectroscopy and passive Q-switching operation of a Co2+ :LaMgAl11O19 crystal," J. Opt. Soc. Am. B 16, 2189-2194 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-12-2189


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