High-beam quality and kilowatt-class diode laser system was reported in the paper using four wavelengths for the wavelength multiplexing and polarization multiplexing. Through the beam shaping method, the beam quality less than 12mm·mrad was got in both the fast axis and the slow axis, so the laser beam could be coupled into 200µm fiber. The optical efficiency of the beam shaping device was more than 94 %. The overall opt-opt conversion efficiency of the laser system reached 85.9 %. The overall electro optical conversion efficiency was 45 %. The power density was over 107 W/cm2. The output power density and the beam quality of the laser system can meet the laser welding system, marking system, cutting system and other industrial processing needs.

Topics
Optical efficiency, Electro-optics, Telecommunications engineering, Lasers, Welding
1.
Zuo
,
T. C.
 (
2007
)
The 21st century advanced manufacturing - laser technology and engineering
,
science press
,
1
–
8
.
Google Scholar
 
2.
Stefano
B.
 &
Paolo
V.
 (
2006
)
High-efficiency high-power diode laser beam shaping and focusing with constant optical-path length equalization
,
Proceedings of SPIE
6184
,
61841Q-1
–
61841Q-8
.
Google Scholar
 
3.
A.
Bayer
,
J.
Meinschien
,
T.
Mitra
 &
M.
Brodner
 (
2008
)
Beam shaping of line generators based on high power diode lasers to achieve high intensity and uniformity levels
,
Proc. of SPIE
7062
,
7062X-1
–
7062x-7
.
Google Scholar
Crossref
Search ADS
 
4.
Friedrich
Bachmann
,
Peter
Loosen
 &
Reinhart
Poprawe
 (
2007
)
High Power Diode Lasers Technology and Applications
,
Springer
,
310
–
320
.
Google Scholar
Crossref
Search ADS
 
5.
Faircloth
B.
 (
2003
)
High-brightness High-power Fiber Coupled Diode Laser System for Material Processing and laser pumping
,
Proceedings of SPIE
4973
(
6
),
34
–
41
(
2003
).
Google Scholar
Crossref
Search ADS
 
6.
Ehlers
B.
,
Du
K.
 &
Baurmann
M.
 (
1997
)
Beam shaping and fiber coupling of high-power diode laser arrays
,
SPIE
3097
,
639
–
644
.
Google Scholar
 
7.
Wang
P.Y.
, (
1994
)
Beam-shaping optics deliver high-power beams
,
Laser Focus World
,
115
–
118
.
Google Scholar
 
8.
Shi
P.
 &
Li
X.L.
 (
2000
)
Micro-prism stack beam shaper for high power laser diode array
,
Acta Optica Sinica
,
11
(
20
),
1544
–
1547
.
Google Scholar
 
9.
Yao
S.
 &
Cao
Y.H.
 (
2008
)
Polarization coupling KW laser diode processing system
,
Laser Journal
,
29
(
5
),
85
–
59
.
Google Scholar
 
10.
Friedrich
,
G. B.
Chances and limitations of high power diode lasers
,
SPIE
5336
,
95
–
106
This content is only available via PDF.
© 2009 Laser Institute of America.
2009
Laser Institute of America
You do not currently have access to this content.