Initial Checklist; Laser Output Power - NORTHROP GRUMMAN Patara I User Manual

Initial Checklist

Laser Output Power

Low Output Power (0.01 W - 20 W)
© 2018 Cutting Edge Optronics, Inc.
Before adjusting or attempting troubleshooting procedures, verify the following.
Additional information is available in the troubleshooting guide that was supplied
with the laser:
 Verify the eDrive is operating at the correct output current and the current set
point matches the test data sheet supplied with the laser.
 Verify that the SHG crystal is set to the temperature specified on the ATP Test
Report Data Summary.
 Verify that the eDrive Q-Switch power control is at 100 percent.
 Ensure that the Q-switch is enabled.
 Verify the Q-switch is set to Internal Trigger and to the frequency specified
on the test data sheet.
 Verify the chiller set point temperature and flow rate are correct.
 Operate the laser and for at least 20 minutes to reach full power and stability
before making any adjustments.
Only after verifying these conditions should adjustments to the laser system be
attempted.
Low Q-switch power: Check the setting of the Q-switch power in the eDrive.
Verify that it is set to 100%.
Problem with power meter: Use another power meter to verify the
measurement.
Low operating current: Check the set current and actual current. A too high or
low current setting will result in low power.
Water temperature not set: Verify the chiller is set to provide the correct water
flow rate and temperature to the laser head.
Phase matching condition of SHG crystal is not met: Check the temperature of
TEC controller and make sure it works properly.
Laser is running in CW mode or problem with hold off: Check the hold off of
the laser, ensure the Q-switch is enabled, and the eDrive's RF driver is
functioning properly.
Chapter Seven: Troubleshooting
52 Patara I and II Laser User Manual