Development of a Short Pulse Broadband and Narrow Linewidth Ultraviolet Laser Using Ce:LiCAF Crystal

Pham Van Duong, Nguyen Xuan Tu, Nguyen Van Diep, Minh Hong Pham, Nobuhiko Sarukura, Marilou Cadatal-Raduban
Author affiliations

Authors

  • Pham Van Duong Institute of Physics, Vietnam Academy of Science and Technology
  • Nguyen Xuan Tu Institute of Physics, Vietnam Academy of Science and Technology
  • Nguyen Van Diep Institute of Physics, Vietnam Academy of Science and Technology
  • Minh Hong Pham Institute of Physics, Vietnam Academy of Science and Technology
  • Nobuhiko Sarukura Institute of Laser Engineering, Osaka University, Suita Osaka 565-0871, Japan
  • Marilou Cadatal-Raduban Centre for Theoretical Chemistry and Physics, School of Natural and Computational Sciences, Massey University, Albany, Auckland 0632, New Zealand

DOI:

https://doi.org/10.15625/0868-3166/29/3SI/14335

Keywords:

ultraviolet laser, short pulse laser, tunable laser, narrow linewidth laser, resonator transient, rare earth-doped fluoride

Abstract

We report the successful development of an all-solid state laser based on a Czochralski method-grown cerium-doped lithium calcium aluminum fluoride (Ce3+:LiCaAlF6 or Ce:LiCAF) crystal as the gain medium. Results for the broadband, narrow linewidth and short pulse laser emission are obtained by pumping the crystal with 7 ns pulses from the fourth harmonics (266 nm) of a Nd:YAG laser operating at 10 Hz. The effects of output coupler reflectivity, resonator length and pump energy on the laser pulse duration were explored. With broadband configuration, a maximum output pulse energy of 3.4 mJ and a slope efficiency of about 33% were achieved. By optimizing the parameters of the resonator and pump laser energy, 450 ps UV laser pulses were generated from resonator transient conditions of low-Q and short resonator under a near threshold pump energy. With narrow linewidth configuration, where the end mirror is replaced by a grating, tunability from 281 nm to 299 nm is also achieved with a linewidth of about 0.2 nm.

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Published

22-10-2019

How to Cite

[1]
P. V. Duong, N. X. Tu, N. V. Diep, M. H. Pham, N. Sarukura, and M. Cadatal-Raduban, “Development of a Short Pulse Broadband and Narrow Linewidth Ultraviolet Laser Using Ce:LiCAF Crystal”, Comm. Phys., vol. 29, no. 3SI, p. 341, Oct. 2019.

Issue

Section

Papers
Received 21-08-2019
Accepted 15-10-2019
Published 22-10-2019

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