Abstract

We demonstrated the regenerative amplification of picosecond laser pulses generated by a gain-switched laser diode at 640 nm with a Pr:YLF crystal that was continuously pumped by a multimode blue laser diode. A 0.7-pJ seed pulse energy sufficiently suppressed the self-oscillation in the amplifier. The amplified pulse energy reached 33 µJ at a repetition rate of 10 kHz. The spatial beam quality was nearly ${{\rm TEM}_{00}}$. We also demonstrated second- and third-harmonic generation and obtained 320- and 213-nm pulse energies of 18 and 0.83 µJ at 10 kHz.

© 2020 Optical Society of America

Diode-pumped 640  nm Pr:YLF regenerative laser pulse amplifier

Naoto Sugiyama, Shogo Fujita, Yusaku Hara, Hiroki Tanaka, and Fumihiko Kannari
Opt. Lett. 44(13) 3370-3373 (2019)

Pr³⁺:YLF mode-locked laser at 640 nm directly pumped by InGaN-diode lasers

Kodai Iijima, Ryosuke Kariyama, Hiroki Tanaka, and Fumihiko Kannari
Appl. Opt. 55(28) 7782-7787 (2016)

Intracavity second-harmonic pulse generation at 261 and 320 nm with a Pr³⁺:YLF laser Q-switched by a Co²⁺:MgAl₂O₄ spinel saturable absorber

Shogo Fujita, Hiroki Tanaka, and Fumihiko Kannari
Opt. Express 27(26) 38134-38146 (2019)

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, and Fumihiko Kannari
Opt. Express 23(15) 19382-19395 (2015)

InGaN diode pumped actively Q-switched intracavity frequency doubling Pr:LiYF₄ 261  nm laser

Junichiro Kojou, Ryo Abe, Ryosuke Kariyama, Hiroki Tanaka, Akira Sakurai, Yojiro Watanabe, and Fumihiko Kannari
Appl. Opt. 53(10) 2030-2036 (2014)