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Proceedings Paper

760nm: a new laser diode wavelength for hair removal modules
Author(s): Martin Wölz; Martin Zorn; Agnieszka Pietrzak; Alex Kindsvater; Jens Meusel; Ralf Hülsewede; Jürgen Sebastian
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Paper Abstract

A new high-power semiconductor laser diode module, emitting at 760 nm is introduced. This wavelength permits optimum treatment results for fair skin individuals, as demonstrated by the use of Alexandrite lasers in dermatology. Hair removal applications benefit from the industry-standard diode laser design utilizing highly efficient, portable and light-weight construction. We show the performance of a tap-water-cooled encapsulated laser diode stack with a window for use in dermatological hand-pieces. The stack design takes into account the pulse lengths required for selectivity in heating the hair follicle vs. the skin. Super-long pulse durations place the hair removal laser between industry-standard CW and QCW applications. The new 760 nm laser diode bars are 30% fill factor devices with 1.5 mm long resonator cavities. At CW operation, these units provide 40 W of optical power at 43 A with wall-plug-efficiency greater than 50%. The maximum output power before COMD is 90 W. Lifetime measurements starting at 40 W show an optical power loss of 20% after about 3000 h. The hair removal modules are available in 1x3, 1x8 and 2x8 bar configurations.

Paper Details

Date Published: 20 February 2015
PDF: 9 pages
Proc. SPIE 9346, Components and Packaging for Laser Systems, 934608 (20 February 2015); doi: 10.1117/12.2077445
Show Author Affiliations
Martin Wölz, JENOPTIK Diode Lab. GmbH (Germany)
Martin Zorn, JENOPTIK Diode Lab. GmbH (Germany)
Agnieszka Pietrzak, JENOPTIK Diode Lab. GmbH (Germany)
Alex Kindsvater, JENOPTIK Laser GmbH (Germany)
Jens Meusel, JENOPTIK Laser GmbH (Germany)
Ralf Hülsewede, JENOPTIK Diode Lab. GmbH (Germany)
Jürgen Sebastian, JENOPTIK Diode Lab. GmbH (Germany)

Published in SPIE Proceedings Vol. 9346:
Components and Packaging for Laser Systems
Alexei L. Glebov; Paul O. Leisher, Editor(s)

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