Actively Cooled Diode Laser Stack, cw
SPL ENxx No Optics
SPL EYxx Fast-Axis Collimation
Preliminary Data
Features
• Uncollimated (EN-series) or fast-axis
collimated radiation (EY-series)
• Modular stack of 1 cm bars actively cooled, for
cw operation
• Highly reliable strained layer InGa(Al)As/GaAs
material with MTTF > 10000 h
• Low thermal resistance using mini coolers
• Flexible stack design, integration of up to
60 bars
• Optional alternative bar-to-bar spacing values
available
• Bar replacement capability for repair / upgrade
• Low smile (< 1 m), and low mechanical
tolerances
• Coolant inlet/outlet at bottom/side
• Extendable to two-dimensional stacks, TN, TY
resp.
Type
SPL EN81
SPL EN94
SPL EN98
SPL EY81
SPL EY94
SPL EY98
1)
Applications
• Pumping of solid state lasers (Nd: YAG,
Yb: YAG, …)
• Direct industrial applications (soldering, surface
treatment, marking, …)
• Heating, illumination
• Medical and printing applications
Safety Advices
Depending on the mode of operation, these
devices emit highly concentrated non visible
infrared light which can be hazardous to the
human eye. Products which incorporate these
devices have to follow the safety precautions
given in IEC 60825-1 “Safety of laser products”.
Other wavelengths in the range of 780 nm … 980 nm are available on request.
2000-11-07
m
Wavelength
1)
808 nm
940 nm
975 nm
808 nm
940 nm
975 nm
Ordering Code
on request
on request
on request
on request
on request
on request
1
SPL ENxx, SPL EYxx
Maximum Ratings
(
T
A
= 20 C mount temperature)
Parameter
Number of bars
Output power (continuous wave) per bar
1)
Operating temperature
2)
Storage temperature
2)
Max. coolant pressure
1)
2)
P
max
–
5
bar
Optical power is measured by coupling into an integrating sphere.
Condensation must be avoided.
2000-11-07
2
°
T
stg
– 40
+ 85
°
°
Symbol
min.
n
2
35
– 10
Values
max.
60
50
+ 60
Unit
–
W
C
C
P
cw
T
op
SPL ENxx, SPL EYxx
Diode Characteristics
(
T
A
= 20 C mount temperature)
Parameter
Output power, cw per bar
1)
Emission wavelength
2)
Threshold current, cw-type
808 nm
I
th, cw
940 nm
975 nm
940 nm
975 nm
Fast-axis collimation efficiency
into beam divergence
Operating current, cw-type
2)
Operating voltage (per bar)
1)2)
Overall efficiency
Beam divergence (half angle)
3) 4)
Thermal resistance
Temperature coefficient of operating current
1)
Temperature coefficient of wavelength
1)
Coolant flow rate (per bar)
Pressure drop
4)
1)
2)
EY-Series
–
–
0.5
R
th
/
T
0.5
0.5
I
op
/I
op
T
–
–
0.35
–
0.27
0.5
1.5
dV
/
dT
P
Depending on emission wavelength.
Standard operating conditions refer to 40 W cw optical output power at 20 °C. Optical power measurements refer to
an integrating sphere.
Far field divergence refers to half angle at 1/e
2
relative intensity.
Depending on number of bars.
3)
4)
2000-11-07
3
° ´
° ´°
,
||
q ´
^
q
EN-Series
D lD
,
,
h
EN-Series
h
EY-series
D D
Differential efficiency
1)
808 nm
lD
Spectral width (FWHM)
2)
l
°
Symbol
min.
Values
typ.
40
808
940
975
4
18
10
8
1.1
0.9
0.9
93
55
1.8
45
30
5
5
max.
50
–
–
–
–
20
12
10
–
–
–
Unit
P
op
peak
35
–
–
–
–
–
–
–
W
nm
nm
A
P
/
I
–
–
–
W/A
col
–
–
–
40
–
–
–
–
–
–
–
–
–
–
–
–
%
A
V
%
deg.
K/W
%/K
nm/K
l/min
bar
I
op, cw
V
op
SPL ENxx, SPL EYxx
Optical Characteristics
(
T
A
= 20 C mount temperature)
Optical Output Power
P
opt
vs.
Forward Current
I
F
cw-device, 10 bars, SPL ENxx
600
OHW00921
P
opt
W
500
V
400
300
P
200
5
100
0
0
10
20
30
40
50
A 70
I
2000-11-07
°
Optical Output Power
P
opt
vs.
Forward Current
I
F
cw-device, 10 bars, SPL EYxx
20
V
600
OHW01242
20
V
V
P
opt
W
500
V
V
15
15
400
10
300
P
10
200
5
100
0
0
0
10
20
30
40
50
A 70
0
I
4
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