| SiMMtec’s
high power diode arrays use a patented, integrated silicon
microchannel cooling process for optimal heat transfer
and elimination at high drive currents. A QCW diode
bar, with a 1 mm cavity length can be driven at peak
currents greater than 200A, producing peak powers greater
than 200W. A standard SiMMtec
array uses 10 diode bars to produce greater than
2kW peak power in QCW mode at duty cycles exceeding
10%. Custom arrays can be configured to produce a range
of wavelengths, output power, and the angle at which
the laser light can be directed.
The characteristics of a typical array are shown in
Fig. 1. The peak power exceeds 2kW with >54% efficiency,
at 200A, under a 10% duty cycle operation. And Fig.
2 illustrates another diode array’s performance
operating at a lower current.
SiMMtec's
standard 10-Bar, lensed diode array
Figure 1
Figure 2
Specifications
for the Standard 10-bar SiMM Array
| Parameter |
Nominal
value/range |
Average
Power @ 10% duty cycle 200A
Average Power @ 20% duty cycle 170A |
200W
300W |
| Bar
center wavelength |
808
+/- 3nm
(Other wavelengths available) |
| Array
spectral width |
<
3nm at 170A
< 5nm at 200A
(Lower spectra widths can be accommodated) |
| Beam
output angle |
55
degrees from normal - Standard
(Other angles can be accommodated) |
Beam
divergence without lensing
Slow axis
Fast axis |
10 degrees
35 degrees |
Beam
divergence with lensing
Slow axis
Fast axis |
10 degrees
< 2 degrees
(0.5 degree can be accommodated) |
| Optical
conversion efficiency |
48%
at 160A |
Array
dimensions
Length
Width
Height (w/standard lens) |
19.4 mm
14.2 mm
15.1 mm |
| Thermal
resistance |
<
0.05 C/W for 32gph; <0.07 C/W for 12gph |
| Coolant
temperature |
20°
C |
| Coolant
flow |
<
12gph is optimal |
| Coolant
operating pressure |
10psi
@ 12gph; 30psi @ 32gph |
| Coolant
channel corrosion |
Silicon
channels are not affected by electrically induced
corrosion as with copper channels. |
| Coolant
Characteristics |
Filtered
distilled water with a corrosion inhibitor; add
glycol for subzero temperature operation; deionized
water not required. |
All
the data above is on both the physical aspects and performance
of SiMMtec’s
standard diode array. Actually array performance is
dependent on the particular diode bar or optics used.
Larger arrays can be produced by combining unlensed
or lensed 10-bar diode arrays onto a single backplane
as illustrated on the Products page of this site. One
backplane can be populated with up to 64 individual,
10-bar diode arrays.
|
