appendix a
A2
Synrad
Series 48Series 48
Series 48Series 48
Series 48 operator’s manual
Closed Loop Stabilization Kit
Introduction
The Closed Loop (C/L) Stabilization Kit, available for 10 W and 25 W Series 48 lasers, must be installed
and calibrated at the factory. The closed loop kit provides an effective, reliable method of stabilizing laser
power output by optically sampling the beam and providing feedback to adjust the PWM duty cycle per-
centage of the UC-2000’s output PWM Command signal.
After installation, the beam passes through an optical sampler (which replaces the standard front plate)
before it exits the closed loop housing. Optical beam transmission is 92% since the sampler diverts
approximately 8% of the output beam to a diffuser and thermopile detector. The detector signal is
amplified and sent to the UC-2000 where the Controller generates a variable duty cycle signal to
maintain constant average laser output power.
Note: Once installed and aligned on the laser, the Closed Loop Stabilization Kit becomes part of the
loop response/gain parameter and must NOT be moved or adjusted. Any user modifications or
adjustments will void the product warranty.
Safety precautions
Danger
possible
personal
injury
Please read these instructions carefully before using your Series 48
laser with a Closed Loop Stabilization Kit. To prevent injury to
personnel or damage to your laser or CL Kit, follow all safety
precautions and setup instructions as described here and in your
laser’s Operator’s Manual. Safe operating practices should be exer-
cised at all times when actively lasing to prevent exposure to direct
or scattered laser radiation. Improper handling or operation may
result in exposure to hazardous invisible laser radiation, damage to,
or malfunction of the laser or Closed Loop Stabilization Kit. Severe
burns will result from exposure to the laser beam. Always wear safety
glasses with side shields to reduce the risk of damage to the eyes
when operating the laser.
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