
Proceedings Paper
Control of slow axis mode behavior with waveguide phase structures in semiconductor broad-area lasersFormat | Member Price | Non-Member Price |
---|---|---|
$17.00 | $21.00 |
Paper Abstract
An increase in the output power of semiconductor waveguide lasers is commonly achieved through broadening the stripe
width of the active waveguide region. However, the resulting amplification of high order modes may degrade the beam
quality of the laser diode. Further, Filamentation and high peak power densities will limit the lifetime of the device by
optical facet damage. We report an approach to control the slow axis mode behaviour by embedding diffractive phase
structures directly into the waveguide layers of the active laser region. Using this technique it is possible to enhance the
amplification by increasing the overlap with the gain region, whilst additional diffraction losses for higher order modes
are generated. By shaping the zero order mode the output beam quality can be increased and a high efficiency of the
device maintained. Finally we discuss manufacturing techniques of these monolithic waveguide lasers and show how to
integrate phase structures through an additional lithographic step. In our experimental realisation we will demonstrate
that micro structured broad area lasers show a smooth transversal mode shape with significantly reduced current
dependency.
Paper Details
Date Published: 3 February 2009
PDF: 7 pages
Proc. SPIE 7230, Novel In-Plane Semiconductor Lasers VIII, 72301L (3 February 2009); doi: 10.1117/12.819399
Published in SPIE Proceedings Vol. 7230:
Novel In-Plane Semiconductor Lasers VIII
Alexey A. Belyanin; Peter M. Smowton, Editor(s)
PDF: 7 pages
Proc. SPIE 7230, Novel In-Plane Semiconductor Lasers VIII, 72301L (3 February 2009); doi: 10.1117/12.819399
Show Author Affiliations
Hans-Christoph Eckstein, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Uwe D. Zeitner, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Uwe D. Zeitner, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Wolfgang Schmid, OSRAM Opto Semiconductors (Germany)
Uwe Strauss, OSRAM Opto Semiconductors (Germany)
Uwe Strauss, OSRAM Opto Semiconductors (Germany)
Published in SPIE Proceedings Vol. 7230:
Novel In-Plane Semiconductor Lasers VIII
Alexey A. Belyanin; Peter M. Smowton, Editor(s)
© SPIE. Terms of Use
