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

Shogo Fujita; Hiroki Tanaka; Fumihiko Kannari

doi:10.1364/AO.394792

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

Shogo Fujita, Hiroki Tanaka, Fumihiko Kannari

Department of Electronics and Electrical Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

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 language	English
Pages (from-to)	5124-5130
Number of pages	7
Journal	Applied Optics
Volume	59
Issue number	17
DOIs	https://doi.org/10.1364/AO.394792
Publication status	Published - 2020 Jun 10

ASJC Scopus subject areas

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

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

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%.",

author = "Shogo Fujita and Hiroki Tanaka and Fumihiko Kannari",

note = "Funding Information: Ministry of Education, Culture, Sports, Science and Technology, Japan for the Photon Frontier Network Program. Publisher Copyright: {\textcopyright} 2020 OSA - The Optical Society. All rights reserved.",

year = "2020",

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doi = "10.1364/AO.394792",

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T1 - Output characteristics of Pr:YAlO3 and Pr:YAG lasers pumped by high-power GaN laser diodes

AU - Fujita, Shogo

AU - Tanaka, Hiroki

AU - Kannari, Fumihiko

N1 - Funding Information: Ministry of Education, Culture, Sports, Science and Technology, Japan for the Photon Frontier Network Program. Publisher Copyright: © 2020 OSA - The Optical Society. All rights reserved.

PY - 2020/6/10

Y1 - 2020/6/10

N2 - 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%.

AB - 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%.

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

Abstract

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