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Development of compact laser system with 1-J, 300-Hz by using high peak power laser-diode pumped Nd:YAG amplifiers for novel laser application
Author(s): Takaaki Morita; Takashi Kurita; Yoshinori Kato; Takuto Iguchi; Takashi Sekine; Yoshinori Tamaoki; Yasuki Takeuchi; Norio Kurita; Kazuki Kawai; Koichi Iyama; Toshiyuki Kawashima
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Paper Abstract

A laser-diode (LD) pumped Nd:YAG compact laser system that is capable of generating 1064-nm, 1-J output pulses in several tens of nanoseconds pulse duration at 300-Hz repetition rate (300-W average power) was developed. A concept of this laser system is based on a ubiquitous machine that is easy to transport and process test rapidly in laboratory. A footprint is 1.2-m in width and 2.4-m in length. This laser system is a master-oscillator power-amplifier (MOPA) architecture that allows for increasing the output energy by adding amplifiers. It consisted of an acousto-optic Qswitched Nd:YAG oscillator, a ϕ3-mm Nd:YAG preamplifier and three ϕ12-mm Nd:YAG main amplifiers. The oscillator generated 6-mJ pulse energy at 37-ns pulse duration that could be adjusted by changing the cavity length. The main amplifier had a small-signal gain (SSG) of 9 by laser diodes (LDs) pumping with maximum 27-kW peak power. The beam size and divergence were adjusted to compensate for thermal lens effect in each amplifier. Single-pass amplification by three main amplifiers increased the pulse energy to 1 J. The pumping repetition rate was fixed to obtain thermally stable condition. However, the output repetition rate is variable from single shot to 300 Hz by controlling the oscillator for the experiment usability.

Paper Details

Date Published: 7 March 2019
PDF: 7 pages
Proc. SPIE 10896, Solid State Lasers XXVIII: Technology and Devices, 108960L (7 March 2019); doi: 10.1117/12.2510755
Show Author Affiliations
Takaaki Morita, Hamamatsu Photonics K.K. (Japan)
Takashi Kurita, Hamamatsu Photonics K.K. (Japan)
Yoshinori Kato, Hamamatsu Photonics K.K. (Japan)
Takuto Iguchi, Hamamatsu Photonics K.K. (Japan)
Takashi Sekine, Hamamatsu Photonics K.K. (Japan)
Yoshinori Tamaoki, Hamamatsu Photonics K.K. (Japan)
Yasuki Takeuchi, Hamamatsu Photonics K.K. (Japan)
Norio Kurita, Hamamatsu Photonics K.K. (Japan)
Kazuki Kawai, Hamamatsu Photonics K.K. (Japan)
Koichi Iyama, Hamamatsu Photonics K.K. (Japan)
Toshiyuki Kawashima, Hamamatsu Photonics K.K. (Japan)

Published in SPIE Proceedings Vol. 10896:
Solid State Lasers XXVIII: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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