Stacked arrays as pumping modules for high-power cw Nd:YAG lasers

Thomas Brand; F. Hollinger

doi:10.1117/12.208440

28 April 1995 Stacked arrays as pumping modules for high-power cw Nd:YAG lasers

Thomas Brand, F. Hollinger

Proceedings Volume 2382, Laser Diodes and Applications; (1995) https://doi.org/10.1117/12.208440
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

Diode pumping of solid state lasers promises many advantages compared with flashlamp pumping. Such as better efficiency, lower thermal stress, compact design, no high voltage and longer lifetime. In between several possibilities of pumping configurations direct coupling of laserdiodes and crystal seems to have the highest efficiency. Stacked arrays as pumping modules for Nd:YAG slab and rod lasers are investigated. The stack consists of 28 monolithic arrays mounted on copper microchannel coolers. The dimensions of the emitting area are 50 X 9 mm² resulting in a maximum pump power density of 107 W/cm². Using a slab crystal with dimensions of 3 X 16 X 65 mm³ and a doping concentration of 0.7 at% Nd, an output power of 140 W cw has been achieved. The optical efficiency has been 31%. With the same stacked array a rod of 50 mm length and 4 mm diameter has been pumped. The pump light has been concentrated into the rod by a cusp shape reflector. Using a stable resonator 170 W output power in free running operation and 100 W average power in high repetition rate Q-switch operation has been achieved.

Citation Download Citation

Thomas Brand and F. Hollinger "Stacked arrays as pumping modules for high-power cw Nd:YAG lasers", Proc. SPIE 2382, Laser Diodes and Applications, (28 April 1995); https://doi.org/10.1117/12.208440

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