appendix a
A4
Synrad
Series 48Series 48
Series 48Series 48
Series 48 operator’s manual
Closed Loop Stabilization Kit
Operation
Set the UC-2000 to MAN. CLOSED or ANV CLOSED mode. Adjust the regulated setpoint to provide
a laser power output between approximately 20% and 80% of full power. This 20% window on either
side of the range allows the Controller to maintain full dynamic power regulation. Within the dynamic
response time of the system, the UC-2000 Controller can be gated from an external, low-frequency signal
source through the Gate connector.
Note: When operating in either closed loop mode, power output is no longer a curve of laser output
versus PWM duty cycle but instead, laser power output becomes a linear function of the desired
setpoint percentage.
For the closed loop kit, servo settling time to 90% of final value occurs within approximately 2 ms. Out-
put power regulation is typically ±2%, even when the beam “line hops” between 10.57 and 10.63 µm.
Closed loop specifications
Table A-1 Closed loop general specifications
Parameter Specification
Optical Transmission 92%, ±1%
Power Input, optical 150 W maximum
Power Input, electrical 12 VDC @ 3 mA (provided by UC-2000)
Power Stability, five minutes
after cold start ±2%
Control Range 20%–80% of rated output power
Control Frequency
1
5 kHz
Servo Settling Time, typical 2 ms
* Specifications subject to change without notice.
1 The Closed Loop Stabilization Kit is calibrated for operation at a PWM Command frequency of 5 kHz.
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