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

Naoto Sugiyama, Shogo Fujita, Yusaku Hara, Hiroki Tanaka, Fumihiko Kannari

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


We demonstrated regenerative laser pulse amplification at 640 nm for the first time, to the best of our knowledge, with a mode-locked Pr3-doped LiYF4 (Pr3:YLF) oscillator as a picosecond seed pulse. A regenerative amplifier with a Pr3:YLF crystal was continuously pumped by a multi-mode InGaN diode laser. At an absorbed pump power of 3.1 W, we obtained amplified pulse energy of 13 μJ at 10 kHz with an excellent spatial beam quality of M 2∼1.1, demonstrated second-harmonic generation, and obtained a 320 nm pulse energy of 5.9 μJ.

Original languageEnglish
Pages (from-to)3370-3373
Number of pages4
JournalOptics Letters
Issue number13
Publication statusPublished - 2019 Jan 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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