CONEX-PSD
Two-Axis Position & Power Sensing Device
3.4
Beam Energy/Power Considerations
3.4.1
Max. Power
The maximum acceptable total beam power depends on the Wavelength.
The maximum current generated by the sensor is 0.5 mA for Si and 1mA for Ge.
In case of higher beam power, it is possible to mount Newport neutral density filter such
as model “FBR-NDxx” on the Newport “Model 883-OH 1" filter holder.
3.4.2
Max. Density
The maximum acceptable beam intensity is limited by the device itself: 30mw/mm
2
.
WARNING
M
AXIMUM BEAM POWER DENSITY
:
30 mW/mm
2
.
3.4.3
Max. Energy
Although PSD sensors are mostly used to check continuous lasers, they can be used to
check the average power of pulsed laser.
However, high energy, short pulses beam might damage the sensor. It is strongly
recommended to NOT exceed the following values:
•
Beam size:
≥
1 mm
2
.
•
Beam power:
≤
1mW.
•
Repetition rate:
≥
10 kHz.
•
Pulse duration:
≥
5 ns.
WARNING
D
O NOT USE TOO SHORT
,
TOO HIGH ENERGY PULSES
.
EDH0315En1030 — 07/16
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