Growth and characterization of Tm,Ho-doped LuLiF4 and YLiF4 crystals

Vikas Sudesh; Kazuhiro Asai; Akihito Kudou; Kazushige Ito; Kiyoshi Shimamura; Tsuguo Fukuda

doi:10.1117/12.424638

1 May 2001 Growth and characterization of Tm,Ho-doped LuLiF₄ and YLiF₄ crystals

Vikas Sudesh, Kazuhiro Asai, Akihito Kudou, Kazushige Ito, Kiyoshi Shimamura, Tsuguo Fukuda

Proceedings Volume 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials; (2001) https://doi.org/10.1117/12.424638
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

Abstract

Several Tm,Ho-doped LuLF and YLF crystals were grown using the Czochralski method. Crystals were pulled in a furnace with atmospheric control system. Pulling and rotation rates were 1 mm/hr and 15 rpm, respectively. High purity (>= 99.99%) fluorides were used as starting materials. High vacuum (approximately equals 10^-5 torr) prior to the growth and CF₄ gas during the growth were applied. Single crystals of up to 20 mm in diameter and 80 mm in length were successfully grown. Various laser rods of sizes 4 X 3 X 2.7 mm³ were prepared from the grown crystal boules. The crystal ends were Brewster- cut to minimize the reflection losses inside the cavity. Two quasi-CW LD-arrays of 6 X 60 W each side-pump the crystals. The pump beam is focused using two lens ducts of length 64 mm to a waist of 2.5 X 2.5 mm². The nearly hemispherical laser cavity is formed by a flat high reflector and a 300 mm radius of curvature 5% transmission output coupler. At room temperature, up to 13.5 mJ (9.9 mJ) with a slope efficiency of 10.5% (7.5%) has been demonstrated at 1 Hz for 5% Tm, 0.5% Ho:LuLF (5% Tm, 0.5% Ho:YLF).

Citation Download Citation

Vikas Sudesh, Kazuhiro Asai, Akihito Kudou, Kazushige Ito, Kiyoshi Shimamura, and Tsuguo Fukuda "Growth and characterization of Tm,Ho-doped LuLiF₄ and YLiF₄ crystals", Proc. SPIE 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials, (1 May 2001); https://doi.org/10.1117/12.424638

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available