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Proceedings Paper

Ongoing development of high-efficiency and high-reliability laser diodes at Spectra-Physics
Author(s): Hanxuan Li; Irving Chyr; Denny Brown; Xu Jin; Frank Reinhardt; Terry Towe; Touyen Nguyen; Raman Srinivasan; Myra Berube; Robert Miller; Kiran Kuppuswamy; Yongdan Hu; Trevor Crum; Tom Truchan; James Harrison
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Paper Abstract

Ongoing optimization of epitaxial designs, MOCVD growth processes, and device engineering at Spectra-Physics has yielded significant improvement in both power conversion efficiency (PCE) and reliable power, without compromising manufacturability in a high-volume production environment. Maximum PCE of 72.2% was measured at 25 °C for 976- nm single-emitter devices with 3-mm cavity length. 928 W continuous-wave (CW) output power has been demonstrated from a high-efficiency (65% maximum PCE) single laser bar with 5-mm cavity length and 77% fill factor. Eight-element laser bars (976 nm) with 100&mgr;m-wide emitters have been operated at >148 W CW, corresponding to linear power densities at the facet >185 mW/&mgr;m. Ongoing life-testing, in combination with stepped stress tests, indicate rates of random failure and wear-out are well below those of earlier device designs. For operation near 800 nm, the design has been optimized for high-power, high-temperature applications. The highest PCE for water-cooled stacks was 54.7% at 35°C coolant temperature.

Paper Details

Date Published: 7 February 2007
PDF: 9 pages
Proc. SPIE 6456, High-Power Diode Laser Technology and Applications V, 64560C (7 February 2007); doi: 10.1117/12.701714
Show Author Affiliations
Hanxuan Li, Spectra-Physics Lasers (United States)
Irving Chyr, Spectra-Physics Lasers (United States)
Denny Brown, Spectra-Physics Lasers (United States)
Xu Jin, Spectra-Physics Lasers (United States)
Frank Reinhardt, Spectra-Physics Lasers (United States)
Terry Towe, Spectra-Physics Lasers (United States)
Touyen Nguyen, Spectra-Physics Lasers (United States)
Raman Srinivasan, Spectra-Physics Lasers (United States)
Myra Berube, Spectra-Physics Lasers (United States)
Robert Miller, Spectra-Physics Lasers (United States)
Kiran Kuppuswamy, Spectra-Physics Lasers (United States)
Yongdan Hu, Spectra-Physics Lasers (United States)
Trevor Crum, Spectra-Physics Lasers (United States)
Tom Truchan, Spectra-Physics Lasers (United States)
James Harrison, Spectra-Physics Lasers (United States)


Published in SPIE Proceedings Vol. 6456:
High-Power Diode Laser Technology and Applications V
Mark S. Zediker, Editor(s)

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