Abstract

Liquid nitrogen (${\mathrm{LN}}_2$) behavior on the surface of excited ${\mathrm{Yb}}^{3+}\text{:}\mathrm{YAG}$ is investigated using fluorometry. From the time-resolved temperature variations and integrated fluorescence spectra intensity on this directly cooled ${\mathrm{Yb}}^{3+}\text{:}\mathrm{YAG}$ surface, we observe a phase transition of ${\mathrm{LN}}_2$ from nucleate boiling to film boiling. As a result of this pool boiling, good beam quality should occur when the temperature and heat flux at an excited surface of ${\mathrm{Yb}}^{3+}\text{:}\mathrm{YAG}$ are below 95 K and $15.8\mathrm{W}/{\mathrm{cm}}^2$, respectively. That is, the ${\mathrm{LN}}_2$ should remain in a steady state of nucleate boiling to produce good beam quality using pool boiling.

© 2016 Optical Society of America

Amplification characteristics of a cryogenic Yb³⁺:YAG total-reflection active-mirror laser

Hiroaki Furuse, Toshimitsu Sakurai, Haik Chosrowjan, Junji Kawanaka, Noriaki Miyanaga, Masayuki Fujita, Shinya Ishii, and Yasukazu Izawa
Appl. Opt. 53(9) 1964-1969 (2014)

Output characteristics of high power cryogenic Yb:YAG TRAM laser oscillator

Hiroaki Furuse, Junji Kawanaka, Noriaki Miyanaga, Haik Chosrowjan, Masayuki Fujita, Kenji Takeshita, and Yasukazu Izawa
Opt. Express 20(19) 21739-21748 (2012)

Zig-zag active-mirror laser with cryogenic Yb³⁺:YAG/YAG composite ceramics

Hiroaki Furuse, Junji Kawanaka, Noriaki Miyanaga, Taku Saiki, Kazuo Imasaki, Masayuki Fujita, Kenji Takeshita, Shinya Ishii, and Yasukazu Izawa
Opt. Express 19(3) 2448-2455 (2011)

Laser cooling in Yb:KY₃F₁₀: a comparison with Yb:YLF

Stefan Püschel, Felix Mauerhoff, Christian Kränkel, and Hiroki Tanaka
Opt. Express 30(26) 47235-47248 (2022)

Cryogenically-cooled Yb:YGAG ceramic mode-locked laser

J. Mužík, M. Jelínek, V. Jambunathan, T. Miura, M. Smrž, A. Endo, T. Mocek, and V. Kubeček
Opt. Express 24(2) 1402-1408 (2016)