Initial Checklist; Laser Output Power - NORTHROP GRUMMAN IKA-012-QTG User Manual

Initial Checklist

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 diode current supply is operating at the correct output current and
 Verify that the TEC Controller is set to the temperature specified on the test
 Ensure that the Q-switch is enabled.
 Verify the Q-switch is set to "internal trigger" and to the frequency specified
 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
Only after verifying these conditions should an attempt be made to make adjustments to
the laser system.

Laser Output Power

Low Output Power (0.01 W -16 W)
Low Q-switch power: Check the setting of the Q-switch driver. The typical RF driver
power is 25W. Low RF power will cause the laser to lose hold off and decrease the laser
output power. High RF power will cause lower laser output power.
Q Switch: Verify that Q Switch window width is set to 5µs.
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.
Pulse repetition rate is not correct: Check the pulse rate frequency (PRF).
© 2019 Cutting Edge Optronics, Inc.
Approved for Public Release; NG19-2099
the current set point matches the test data sheet supplied with the laser.
data sheet supplied with the laser.
on the test data sheet.
before making any adjustments.
Chapter Seven: Troubleshooting
46 Iklwa Laser User Manual
CEO-UMAN-0055E