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Thermal Lens Measurement in Diode-Pumped Nd:YAG Zig-Zag SlabA major advantage that solid state zig-zag slab lasers have over conventional rod-based designs is that a much weaker thermal lens is produced in the slab when side-pumped with Quasi-CW laser diode arrays, particularly if the pump radiation is kept well away from the Brewster-cut ends. This paper reports on a rather strong thermal lens produced when diode pump radiation is collimated into a narrow portion of the zig-zag slab. The collimation of multi-bar pump packages to increase brightness and improve overlap is a direct consequence of designs which seek to maximize performance and efficiency. Our slab design employed a 8.1 cm x 2.5 mm x 5 mm slab with opposing Brewster end faces. It was pumped through the 2.5 mm direction by seven laser diode array packages, each housing four 6OW diode bars, 1 cm in width. The pump face, anti-reflection (AR) coated at 809 nm, was 6.8 cm in width and the 8.1 cm opposing side, high-reflection (HR) coated at 809 nm, reflected the unabsorbed pump beam for a second pass through the slab.
Document ID
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Smoak, M. C.
(American Univ. Washington, DC United States)
Kay, R. B.
(American Univ. Washington, DC United States)
Coyle, D. B.
(American Univ. Washington, DC United States)
Hopf, D.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
August 18, 2013
Publication Date
July 1, 1998
Publication Information
Publication: Nineteenth International Laser Radar Conference
Issue: Part 2
Subject Category
Lasers And Masers
Distribution Limits
Work of the US Gov. Public Use Permitted.
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