Advanced

Improvement of brightness and output power of high-power laser diodes in the visible spectral region

Samsöe Andersen, Eva LU ; Malm, P; Andersen, PE; Petersen, PM and Andersson-Engels, Stefan LU (2003) In Optics Communications 219(1-6). p.369-375
Abstract
This paper reports on a novel design for a high-brightness quantum-well AlGaInP laser-diode system operating at 635 nm. The spatial coherence of two broad area laser diodes is improved using spatial filtering and optical feedback from a narrow mirror stripe on each laser. To increase power, the outputs from the two systems are passively combined using a polarizing beam splitter. The result is a compact system providing a high-brightness beam. The beam-quality parameter is improved in one direction from M-2 = 12 and M-2 = 16 for the two lasers, to M-2 = 2.1 for the combined beam. The other direction of the beam is left unchanged due to its natural high quality with an M-2 value around 1.5. A procedure for efficient coupling of the two... (More)
This paper reports on a novel design for a high-brightness quantum-well AlGaInP laser-diode system operating at 635 nm. The spatial coherence of two broad area laser diodes is improved using spatial filtering and optical feedback from a narrow mirror stripe on each laser. To increase power, the outputs from the two systems are passively combined using a polarizing beam splitter. The result is a compact system providing a high-brightness beam. The beam-quality parameter is improved in one direction from M-2 = 12 and M-2 = 16 for the two lasers, to M-2 = 2.1 for the combined beam. The other direction of the beam is left unchanged due to its natural high quality with an M-2 value around 1.5. A procedure for efficient coupling of the two lasers into a small core-diameter optical fiber is given. This capability facilitates a wide range of applications including interstitial medical therapies, where delivery of the treatment light through thin optical fibers is essential. (C) 2003 Elsevier Science B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
fiber-coupling, beam quality, brightness, laser diodes, optical feedback
in
Optics Communications
volume
219
issue
1-6
pages
369 - 375
publisher
Elsevier
external identifiers
  • wos:000182553400045
  • scopus:0344089041
ISSN
0030-4018
DOI
language
English
LU publication?
yes
id
eb5fa7e5-8d06-4ee6-a4fb-c0c90a10d101 (old id 312590)
date added to LUP
2007-09-21 10:17:28
date last changed
2018-05-29 09:25:00
@article{eb5fa7e5-8d06-4ee6-a4fb-c0c90a10d101,
  abstract     = {This paper reports on a novel design for a high-brightness quantum-well AlGaInP laser-diode system operating at 635 nm. The spatial coherence of two broad area laser diodes is improved using spatial filtering and optical feedback from a narrow mirror stripe on each laser. To increase power, the outputs from the two systems are passively combined using a polarizing beam splitter. The result is a compact system providing a high-brightness beam. The beam-quality parameter is improved in one direction from M-2 = 12 and M-2 = 16 for the two lasers, to M-2 = 2.1 for the combined beam. The other direction of the beam is left unchanged due to its natural high quality with an M-2 value around 1.5. A procedure for efficient coupling of the two lasers into a small core-diameter optical fiber is given. This capability facilitates a wide range of applications including interstitial medical therapies, where delivery of the treatment light through thin optical fibers is essential. (C) 2003 Elsevier Science B.V. All rights reserved.},
  author       = {Samsöe Andersen, Eva and Malm, P and Andersen, PE and Petersen, PM and Andersson-Engels, Stefan},
  issn         = {0030-4018},
  keyword      = {fiber-coupling,beam quality,brightness,laser diodes,optical feedback},
  language     = {eng},
  number       = {1-6},
  pages        = {369--375},
  publisher    = {Elsevier},
  series       = {Optics Communications},
  title        = {Improvement of brightness and output power of high-power laser diodes in the visible spectral region},
  url          = {http://dx.doi.org/},
  volume       = {219},
  year         = {2003},
}