760nm: a new laser diode wavelength for hair removal modules

Martin Wölz; Martin Zorn; Agnieszka Pietrzak; Alex Kindsvater; Jens Meusel; Ralf Hülsewede; Jürgen Sebastian

doi:10.1117/12.2077445

20 February 2015 760nm: a new laser diode wavelength for hair removal modules

Martin Wölz, Martin Zorn, Agnieszka Pietrzak, Alex Kindsvater, Jens Meusel, Ralf Hülsewede, Jürgen Sebastian

Proceedings Volume 9346, Components and Packaging for Laser Systems; 934608 (2015) https://doi.org/10.1117/12.2077445
Event: SPIE LASE, 2015, San Francisco, California, United States

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.

Citation Download Citation

Martin Wölz, Martin Zorn, Agnieszka Pietrzak, Alex Kindsvater, Jens Meusel, Ralf Hülsewede, and Jürgen Sebastian "760nm: a new laser diode wavelength for hair removal modules", Proc. SPIE 9346, Components and Packaging for Laser Systems, 934608 (20 February 2015); https://doi.org/10.1117/12.2077445

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available