Output characteristics of Pr:YAlO3 and Pr:YAG lasers pumped by high-power GaN laser diodes

Shogo Fujita, Hiroki Tanaka, Fumihiko Kannari

Research output: Contribution to journalArticlepeer-review

Abstract

We investigated whether Pr:YAlO3 and Pr:Y3Al5O12 (YAG) can work as gain media for high-power visible lasers and replace trivalent praseodymium (Pr)-doped fluoride crystals, with particular focus on thermal loading resistivity. Pr:YAlO3 exhibits a high laser gain at 747 nm, and we obtained a maximum output power of 1.2 W and a slope efficiency of 26.7% with high-power GaN laser diode pumping. Excited state absorption and large phonon energy hinder laser oscillation of Pr:YAG at room temperature. We obtained 616 nm laser oscillation of Pr:YAG at 40 K. Furthermore, we achieved a visible laser with Pr:YAG ceramics for the first time. The maximum output power is ∼30 mW with a slope efficiency of ∼0.7%.

Original languageEnglish
Pages (from-to)5124-5130
Number of pages7
JournalApplied Optics
Volume59
Issue number17
DOIs
Publication statusPublished - 2020 Jun 10

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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