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Proceedings Paper

Passive laser Q-switches based on MeF2:Nd2+ (Me-Ca, Sr, Ba) crystals
Author(s): Tasoltan T. Basiev; Sergey B. Mirov; S. A. Sychev
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Paper Abstract

We present the results of investigations of nonlinear absorption in alkaline-earth fluoride crystals containing divalent neodymium ions, and also the results of utilizing these crystals for passive Q-switching and mode-locking in solid state lasers radiating in the wavelength range (1.3 - 1.6) micrometers . Spectroscopic parameters of the studied materials such as the effective absorption cross-section and the relaxation time of the state of self-induced transparency (SIT) were estimated. The nature of the residual absorption was determined in these crystals and a simple spectroscopic model describing the SIT process in MeF2:Nd2+-crystals is offered. It is demonstrated that MeF2:Nd2+-crystals can be used as Q- switches for the lasers of the near IR wavelength range. The results of Q-switching of neodymium and erbium lasers generating in the ranges of 1.3 and 1.54 micrometers , respectively, are presented. The single-peak generation regime and generation of a train of modulated pulses are investigated. The use of SrF2:Nd2+-crystals allowed us to realize the mode-locked regime in YAG:Nd-crystal laser, operating on the transition 4F3/2 yields 4I13/2. Evaluation of the duration of peaks gives the time less than 400 psec.

Paper Details

Date Published: 19 November 1992
PDF: 16 pages
Proc. SPIE 1839, Solid State Lasers and New Laser Materials, (19 November 1992); doi: 10.1117/12.131772
Show Author Affiliations
Tasoltan T. Basiev, General Physics Institute (Russia)
Sergey B. Mirov, General Physics Institute (Russia)
S. A. Sychev, General Physics Institute (Russia)


Published in SPIE Proceedings Vol. 1839:
Solid State Lasers and New Laser Materials

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