Solid-state lasers directly pumped by InGaN diode lasers: Ti:sapphire and Pr3+:LiYF4 lasers

Hiroki Tanaka, Ryosuke Kariyama, Kodai Iijima, Ryota Sawada, Fumihiko Kannari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report our recent progress of solid-state lasers, the titanium-doped sapphire laser and the praseodymium-doped LiYF4 (Pr3+:LiYF4) laser, directly pumped by InGaN diode lasers of green and blue. While the titanium-doped sapphire laser can be pumped by both blue and green diode lasers because of its broad absorption spectrum, we find 450-nm diode laser pumping inefficient for its power scaling owing to the onset of an additional absorption loss induced by the blue pump laser. The degradation of the performance of a Ti:sapphire laser induced by a 450-nm diode pumping is experimentally revealed. Furthermore, we demonstrate a passively mode-locked Ti:sapphire laser pumped by two green diode lasers of 1-W, and 74 fs pulses at a repetition rate of 120 MHz with an averaged output power of 45 mW are obtained. The Pr3+:LiYF4 laser, one of the most promising candidates as a visible laser, has become possible to be pumped directly by blue diode lasers of 440-nm wavelength. We demonstrate the power scaling at 523 and 640 nm oscillation, a passive Q-switching at 640 nm with a Cr4+:YAG saturable absorber by utilizing polarization-combined blue diode lasers as the pump source.

Original languageEnglish
Title of host publicationSolid State Lasers XXV: Technology and Devices
PublisherSPIE
Volume9726
ISBN (Electronic)9781628419610
DOIs
Publication statusPublished - 2016 Jul 15
EventSolid State Lasers XXV: Technology and Devices - San Francisco, United States
Duration: 2016 Feb 152016 Feb 18

Other

OtherSolid State Lasers XXV: Technology and Devices
CountryUnited States
CitySan Francisco
Period16/2/1516/2/18

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Keywords

  • diode-pumped
  • mode-locking
  • Q-switching
  • solid-state laser
  • ultrafast laser
  • visible laser

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Tanaka, H., Kariyama, R., Iijima, K., Sawada, R., & Kannari, F. (2016). Solid-state lasers directly pumped by InGaN diode lasers: Ti:sapphire and Pr3+:LiYF4 lasers. In Solid State Lasers XXV: Technology and Devices (Vol. 9726). [97261X] SPIE. https://doi.org/10.1117/12.2213815