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Military University of Technology Institute of Optoelectronics. Advanced Solid-State Lasers (27 Oct – 1 Nov 2013 – Paris, France) ATu3A.30. Paper no. Polycrysta l ine Cr 2+ : ZnSe Laser Pumped by Efficient Tm:YLF Oscillator

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MilitaryUniversity of Technology

Institute of Optoelectronics

Advanced Solid-State Lasers (27 Oct – 1 Nov 2013 – Paris, France) ATu3A.30

Paper no.

Polycrystaline Cr2+:ZnSe Laser Pumped by Efficient Tm:YLF Oscillator

L. Gorajek, J. Jabczynski, M. Kaskow

Institute of Optoelectronics, MilitaryUniversity of Technology ,Warsaw, Poland

Abstract

Efficient high peak power Tm:YLF laser emitting 5.5-mJ pulses of duration about 11ns was presented. Slope efficiency was about 50% according to incident pump power. 3mJ of output energy for Cr:ZnSe laser was achieved.

Cr:ZnSepolycrystal.

Tm:YLF3.5% 3x10 mm

Lrez = 120 mm

Outputcoupler: T = 30% Rcurv = 200 mm

Laser setup

Cr:ZnSepolycrystal2.64 x 6.50 x 7.98 mm

NCr = 2.7 x 1018 cm-3

Lrez = 75 mm

Outputcoupler: T = 3%

Dichroic mirror Rcurv = 200 mm

Microscopicimage of Cr:ZnSepolycrystal.

Outputpowervs. Pump power for free-runningTm:YLF laser.

Beamqualitymeasurements.

1 mm

Output spectrum of Tm:YLF laser.

Output energy vs. pump energy for free-runningCr:ZnSe laser.

Output energy vs. Pump energy for Tm:YLF laser inpulsedregime.

Generation spectrum of Cr:ZnSe laser infree-runningregime.

  • Summary
  • Slopeefficiency of Tm:YLF laser was 50% (according to incident pump power.
  • 5.5 mJoutput energy in 11.5 nspulsescorresponds to 0.5 MW of peakpower
  • Nearlydiffractionlimmitedoutputbeam
  • 3 mJ of output energy inpolycrystalineCr:ZnSe medium

Half-megawattpulse of Tm:YLF laser (energy: 5.5 mJ).

Institute of OptoelectronicsMUT

ul. gen. S. Kaliskiego 2, 00-908 Warsaw, Poland

phone: (+48 22) 683 94 30, fax: (+48 22) 666 89 50

www.ioe.wat.edu.pl

Thisresearchhasbeensupported by:

– Foundation for Polish Science

– PolishMinistry of Science and HigherEducation

Project No. UMO-2012/06/M/ST/00425