High-brightness kW QCW diode laser stacks with ultra-low pitches

David Schleuning; Rajiv Pathak; Calvin Luong; Eli Weiss; Tom Hasenberg

doi:10.1117/12.809637

23 February 2009 High-brightness kW QCW diode laser stacks with ultra-low pitches

David Schleuning, Rajiv Pathak, Calvin Luong, Eli Weiss, Tom Hasenberg

Proceedings Volume 7198, High-Power Diode Laser Technology and Applications VII; 719802 (2009) https://doi.org/10.1117/12.809637
Event: SPIE LASE: Lasers and Applications in Science and Engineering, 2009, San Jose, California, United States

Abstract

State-of-the-art QCW solid-state lasers are demanding ever higher brightness from the pump source-conduction cooled diode laser stacks. The intensity of a QCW vertical stack is limited by the peak power of each diode bar and the bar pitch. The minimum bar pitch of the existing laser diode stacks on the market is about 400um. In this paper, we present a unique vertical diode laser stack package design to achieve a bar pitch as low as 150um, which improves the intensity of the stack by nearly 3 times. Together with the state-of-art diode laser bar from Coherent, greater than 30kW/cm² peak power density is achieved from the emitting area of the vertical stack. The p-n junction temperature of the diode bars in the device under QCW operation is modeled with FEA software, as well as measured in this research. Updated reliability results for these diode laser stacks are also reported.

Citation Download Citation

David Schleuning, Rajiv Pathak, Calvin Luong, Eli Weiss, and Tom Hasenberg "High-brightness kW QCW diode laser stacks with ultra-low pitches", Proc. SPIE 7198, High-Power Diode Laser Technology and Applications VII, 719802 (23 February 2009); https://doi.org/10.1117/12.809637

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