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Proceedings Paper

Continuous improvement of high-efficiency high-power 800-980nm diode lasers at Spectra-Physics
Author(s): Hanxuan Li; Terry Towe; Irving Chyr; Xu Jin; Robert Miller; Oscar Romero; Daming Liu; Denny Brown; Tom Truchan; Touyen Nguyen; Trevor Crum; Ed Wolak; Robert Bullock; Jeff Mott; James Harrison
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Paper Abstract

New-generation multi-mode 9xx mini-bars used in fiber pump modules have been developed. The epitaxial designs have been improved for lower fast-axis and slow-axis divergence, higher slope efficiency and PCE by optimizing layer structures as well as minimizing internal loss. For 915nm mini-bars with 5-mm cavity length, maximum PCE is as high as ~61% for 35W operation and remains above 59% at 45W. For 808nm, a PCE of 56% at 135W CW operation has been demonstrated with 36%-fill-factor, 3-mm-cavity-length, water-cooled bars at 50°C coolant temperature. On passive-cooled standard CS heatsinks, PCE of >51% is measured for 100W operation at 50°C heatsink temperature. Leveraging these improvements has enabled low-cost bars for high-power, high-temperature applications.

Paper Details

Date Published: 24 February 2009
PDF: 7 pages
Proc. SPIE 7198, High-Power Diode Laser Technology and Applications VII, 719805 (24 February 2009); doi: 10.1117/12.809694
Show Author Affiliations
Hanxuan Li, Newport Spectra-Physics (United States)
Terry Towe, Newport Spectra-Physics (United States)
Irving Chyr, Newport Spectra-Physics (United States)
Xu Jin, Newport Spectra-Physics (United States)
Robert Miller, Newport Spectra-Physics (United States)
Oscar Romero, Newport Spectra-Physics (United States)
Daming Liu, Newport Spectra-Physics (United States)
Denny Brown, Newport Spectra-Physics (United States)
Tom Truchan, Newport Spectra-Physics (United States)
Touyen Nguyen, Newport Spectra-Physics (United States)
Trevor Crum, Newport Spectra-Physics (United States)
Ed Wolak, Newport Spectra-Physics (United States)
Robert Bullock, Newport Spectra-Physics (United States)
Jeff Mott, Newport Spectra-Physics (United States)
James Harrison, Newport Spectra-Physics (United States)


Published in SPIE Proceedings Vol. 7198:
High-Power Diode Laser Technology and Applications VII
Mark S. Zediker, Editor(s)

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