Vol. 29 No. 3SI (2019)
Papers

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

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

Published 22-10-2019

Keywords

  • ultraviolet laser,
  • short pulse laser,
  • tunable laser,
  • narrow linewidth laser,
  • resonator transient,
  • rare earth-doped fluoride
  • ...More
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How to Cite

Duong, P. V., Tu, N. X., Diep, N. V., Pham, M. H., Sarukura, N., & Cadatal-Raduban, M. (2019). Development of a Short Pulse Broadband and Narrow Linewidth Ultraviolet Laser Using Ce:LiCAF Crystal. Communications in Physics, 29(3SI), 341. https://doi.org/10.15625/0868-3166/29/3SI/14335

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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