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Proceedings Paper

650 nm tapered lasers with 1 W maximum output power and nearly diffraction limited beam quality at 500 mW
Author(s): B. Sumpf; P. Adamiec; M. Zorn; P. Froese; J. Fricke; P. Ressel; H. Wenzel; M. Weyers; G. Erbert; G. Tränkle
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Paper Abstract

High-brightness 650 nm tapered lasers with output powers up to 1 W and nearly diffraction limited beam quality at 500 mW were realized. The vertical structure is based on an InGaP single quantum well (SQW) embedded in AlGaInP waveguide layers and n-AlInP and p-AlGaAs cladding layers. The tapered structure consists of a 750 μm long ridge waveguide section and a 1.25 mm long flared section. Taper angles of 2°, 3° and 4° were manufactured. At 15°C, the devices achieve 1 W at an operating current below 2 A in CW operation. The conversion efficiency is about 20%. At 500 mW output power a nearly diffraction limited beam quality with a beam propagation ratio of about 1.5 was measured. The reliability was studied in a long-term test for five tapered diodes at 250 mW over 1,000 h and than at 500 mW over 2,000 h. All diodes survived this test. The beam quality remains nearly stable over the complete reliability test.

Paper Details

Date Published: 13 February 2008
PDF: 8 pages
Proc. SPIE 6876, High-Power Diode Laser Technology and Applications VI, 68760M (13 February 2008); doi: 10.1117/12.761575
Show Author Affiliations
B. Sumpf, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
P. Adamiec, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
M. Zorn, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
P. Froese, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
J. Fricke, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
P. Ressel, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
H. Wenzel, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
M. Weyers, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
G. Erbert, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
G. Tränkle, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)


Published in SPIE Proceedings Vol. 6876:
High-Power Diode Laser Technology and Applications VI
Mark S. Zediker, Editor(s)

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