Yb:YAG/Cr:YAG microchip laser output energy optimization

Jan Šulc; Jan Eisenschreiber; Helena Jelínková; Karel Nejezchleb; Václav Škoda

doi:10.1117/12.2520918

26 April 2019 Yb:YAG/Cr:YAG microchip laser output energy optimization

Jan Šulc, Jan Eisenschreiber, Helena Jelínková, Karel Nejezchleb, Václav Škoda

Proceedings Volume 11033, High-Power, High-Energy, and High-Intensity Laser Technology IV; 1103310 (2019) https://doi.org/10.1117/12.2520918
Event: SPIE Optics + Optoelectronics, 2019, Prague, Czech Republic

Abstract

The influence of pumping beam diameter on output of the room-temperature operated Q-switched longitudinally diode-pumped Yb:YAG microchip laser was investigated. The tested microchip laser was based on monolith crystal (diameter 3mm) which combines in one piece an active laser part (Yb:YAG crystal, 10 at.% Yb/Y, 3mm long) and saturable absorber (Cr:YAG crystal, 1.36mm long, initial transmission 90% @ 1031 nm). The microchip resonator consisted of dielectric mirrors directly deposited on the monolith surfaces. The pump mirror (HT for pump radiation, HR for generated radiation) was placed on the Yb:YAG part. The output coupler with reflection 55% for the generated wavelength was placed on the Cr³+-doped part. For longitudinal pumping, fibre coupled (core diameter 400 ¹m, NA= 0:22) laser diode was used. The diode was operating in pulsed regime (repetition rate 20 Hz, pulse length 3 ms, maximum pumping energy 95 mJ, wavelength 934 nm). Three various pumping optics offering pumping beam radius 0.20, 0.27, and 0.34mm were used. The wavelength of microchip laser emission was 1031 nm. The pumping beam radius did not signficantly influenced the pulse duration which was 1:5 § 0:3 ns (FWHM) in all three cases. The highest generated single Q-switched pulse energy (1.08 mJ) was obtained for pumping beam radius 0.27mm for maximum pumping. The corresponding peak power was 0.72MW.

Citation Download Citation

Jan Šulc, Jan Eisenschreiber, Helena Jelínková, Karel Nejezchleb, and Václav Škoda "Yb:YAG/Cr:YAG microchip laser output energy optimization", Proc. SPIE 11033, High-Power, High-Energy, and High-Intensity Laser Technology IV, 1103310 (26 April 2019); https://doi.org/10.1117/12.2520918

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Pulsed laser operation

Q switched lasers

Crystals

Laser optics

Laser crystals

Optical pumping

Q switching

Show All Keywords

Keywords/Phrases

Search In:

Publication Years