2-mJ single-axial-mode gain-switched Cr:forsterite lasers.

Appl Opt

Department of Physics, University of Otago, PO Box 56, Dunedin, New Zealand.

Published: April 2003

AI Article Synopsis

  • The study reports on a Cr4+ laser operating in single-longitudinal-mode, achieving an output energy of up to 1.9 mJ using two types of coupled-cavity resonators.
  • The laser, pumped by a Q-switched Nd:YAG laser, demonstrated a modified MIGI cavity that produced tunable output between 1150 and 1330 nm with a bandwidth of 100 MHz.
  • Impressive conversion efficiency of 3.2% and a low pump threshold density of 0.2 J/cm2 were observed, alongside increased mode spacing confirming the coupled-cavity theory.

Article Abstract

Single-longitudinal-mode operation of gain-switched Cr4+ laser, with output energy as much as 1.9 mJ, is reported from two different coupled-cavity resonators. A prism-coupled cavity and a modified Michelson interferometric grazing-incidence (MIGI) cavity was pumped by a multilongitudinal-mode Q-switched Nd:YAG laser; the modified MIGI cavity obtained 100-MHz-bandwidth laser output tunable between 1150 and 1330 nm. Conversion efficiency of 3.2% (slope efficiency of 4%) was achieved, with a pump threshold density as small as 0.2 J/cm2. Mode spacing of the laser output in multilongitudinal mode showed increased mode spacing in agreement with a coupled-cavity theory.

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Source
http://dx.doi.org/10.1364/ao.42.002206DOI Listing

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