Passive Q-switching of a Tm:YLF laser with a Co2+ doped silver halide saturable absorber

Harel Hecht, Zeev Burshtein, Abraham Katzir, Salman Noach, Maxim Sokol, Eugene Frumker, Ehud Galun, Amiel A. Ishaaya*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We report a successful passive Q-switching of a Tm:YLF laser operating at λ = 1.9 μm, using a Co2+:AgCl0.5Br0.5 saturable absorber. Approximately 200-ns long, 150 μJ pulses were obtained. Increase in pump energy resulted in repetitive pulsing, with a repetition rate approximately proportional to the pump pulse energy. Room-temperature optical transmission saturation curves measured in ∼1-mm thick Co2+:AgCl0.5Br0.5 plates yielded a ground state absorption cross section σgs=(7.8±0.5)×10−18cm2, and an excited state absorption cross section σes=(3.3±0.3)×10−18cm2, at λ = 1.9 μm. The lifetime of the A2(4F) second excited-state of the octahedral O symmetry was τ=(0.6±0.06)ns.

Original languageEnglish
Pages (from-to)64-69
Number of pages6
JournalOptical Materials
Volume64
DOIs
StatePublished - 1 Feb 2017

Keywords

  • Laser materials
  • Passive Q-switch
  • Silver halide
  • Solid-state lasers

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