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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)
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author
; ; ; and
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
10.1016/S0030-4018(03)01316-6
language
English
LU publication?
yes
id
eb5fa7e5-8d06-4ee6-a4fb-c0c90a10d101 (old id 312590)
date added to LUP
2016-04-01 15:53:33
date last changed
2022-04-22 18:10:50
@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}},
  keywords     = {{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          = {{https://lup.lub.lu.se/search/files/4504755/2370767.pdf}},
  doi          = {{10.1016/S0030-4018(03)01316-6}},
  volume       = {{219}},
  year         = {{2003}},
}