Saturation of 640-nm absorption in Cr4+:YAG for an InGaN laser diode pumped passively Q-switched Pr3+:YLF laser

Hiroki Tanaka; Ryosuke Kariyama; Kodai Iijima; Kenichi Hirosawa; Fumihiko Kannari

doi:10.1364/OE.23.019382

Saturation of 640-nm absorption in Cr⁴⁺:YAG for an InGaN laser diode pumped passively Q-switched Pr³⁺:YLF laser

Hiroki Tanaka, Ryosuke Kariyama, Kodai Iijima, Kenichi Hirosawa, Fumihiko Kannari

Department of Electronics and Electrical Engineering

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

26 Citations (Scopus)

Abstract

We measure the absorption recovery time, the ground- and excited-state absorption cross sections of a Cr⁴⁺:YAG crystal at 640 nm for the first time. A pump-probe measurement reveals the existence of two recovery times of 26 ns and 5.6 μs. By a Z-scan experiment, the ground- and excited-state absorption cross sections are estimated to be 1.70-1.75×10^-17 and 0.95-1.00×10^-17cm², respectively. The adequacy of the proposed model and the accuracy of the estimated parameters of the saturable absorber are verified by reproducing the experimentally obtained performance of a passively Q-switched Pr³⁺:YLF laser with the Cr⁴⁺:YAG saturable absorber from rate equation analysis.

Original language	English
Pages (from-to)	19382-19395
Number of pages	14
Journal	Optics Express
Volume	23
Issue number	15
DOIs	https://doi.org/10.1364/OE.23.019382
Publication status	Published - 2015 Jul 27

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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@article{3312e69728834774bd47ba2bf59bc984,

title = "Saturation of 640-nm absorption in Cr4+:YAG for an InGaN laser diode pumped passively Q-switched Pr3+:YLF laser",

abstract = "We measure the absorption recovery time, the ground- and excited-state absorption cross sections of a Cr4+:YAG crystal at 640 nm for the first time. A pump-probe measurement reveals the existence of two recovery times of 26 ns and 5.6 μs. By a Z-scan experiment, the ground- and excited-state absorption cross sections are estimated to be 1.70-1.75×10-17 and 0.95-1.00×10-17cm2, respectively. The adequacy of the proposed model and the accuracy of the estimated parameters of the saturable absorber are verified by reproducing the experimentally obtained performance of a passively Q-switched Pr3+:YLF laser with the Cr4+:YAG saturable absorber from rate equation analysis.",

author = "Hiroki Tanaka and Ryosuke Kariyama and Kodai Iijima and Kenichi Hirosawa and Fumihiko Kannari",

note = "Funding Information: We gratefully thank Nichia Inc. for supplying the high-power InGaN blue laser diodes. This research was supported by a Grant-in-aid from the Ministry of Education, Culture, Sports, Science, and Technology, Japan for the Photon Frontier Network Program and by JSPS KAKENHI Grant Number 24656055. This work was also supported in part by a Grant-in-Aid for the Program of Leading Graduate Schools of Keio University for {"}Science for Development of Super Mature Society{"} from the Ministry of Education, Culture, Sport, Science, and Technology in Japan.",

year = "2015",

month = jul,

day = "27",

doi = "10.1364/OE.23.019382",

language = "English",

volume = "23",

pages = "19382--19395",

journal = "Optics Express",

issn = "1094-4087",

publisher = "The Optical Society",

number = "15",

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T1 - Saturation of 640-nm absorption in Cr4+:YAG for an InGaN laser diode pumped passively Q-switched Pr3+:YLF laser

AU - Tanaka, Hiroki

AU - Kariyama, Ryosuke

AU - Iijima, Kodai

AU - Hirosawa, Kenichi

AU - Kannari, Fumihiko

N1 - Funding Information: We gratefully thank Nichia Inc. for supplying the high-power InGaN blue laser diodes. This research was supported by a Grant-in-aid from the Ministry of Education, Culture, Sports, Science, and Technology, Japan for the Photon Frontier Network Program and by JSPS KAKENHI Grant Number 24656055. This work was also supported in part by a Grant-in-Aid for the Program of Leading Graduate Schools of Keio University for "Science for Development of Super Mature Society" from the Ministry of Education, Culture, Sport, Science, and Technology in Japan.

PY - 2015/7/27

Y1 - 2015/7/27

N2 - We measure the absorption recovery time, the ground- and excited-state absorption cross sections of a Cr4+:YAG crystal at 640 nm for the first time. A pump-probe measurement reveals the existence of two recovery times of 26 ns and 5.6 μs. By a Z-scan experiment, the ground- and excited-state absorption cross sections are estimated to be 1.70-1.75×10-17 and 0.95-1.00×10-17cm2, respectively. The adequacy of the proposed model and the accuracy of the estimated parameters of the saturable absorber are verified by reproducing the experimentally obtained performance of a passively Q-switched Pr3+:YLF laser with the Cr4+:YAG saturable absorber from rate equation analysis.

AB - We measure the absorption recovery time, the ground- and excited-state absorption cross sections of a Cr4+:YAG crystal at 640 nm for the first time. A pump-probe measurement reveals the existence of two recovery times of 26 ns and 5.6 μs. By a Z-scan experiment, the ground- and excited-state absorption cross sections are estimated to be 1.70-1.75×10-17 and 0.95-1.00×10-17cm2, respectively. The adequacy of the proposed model and the accuracy of the estimated parameters of the saturable absorber are verified by reproducing the experimentally obtained performance of a passively Q-switched Pr3+:YLF laser with the Cr4+:YAG saturable absorber from rate equation analysis.

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