Figure 3-2. Accessible Holes For Hr And Oc Mirror Adjustment - NORTHROP GRUMMAN Patara EPL-016-QTG Quick Installation Manual

LASER OUT
COUNTERCLOCKWISE—MOVE BEAM TO THE LEFT
CLOCKWISE—MOVE BEAM TO THE LEFT
COUNTERCLOCKWISE—MOVE BEAM TO THE RIGHT
CLOCKWISE—MOVE BEAM UP
COUNTERCLOCKWISE—MOVE BEAM DOWN
ACCESS HOLES FOR
HR MIRROR ADJUSTMENT
© 2019 Cutting Edge Optronics, Inc.
CLOCKWISE—MOVE BEAM UP
COUNTERCLOCKWISE—MOVE BEAM DOWN
CLOCKWISE—MOVE BEAM TO THE RIGHT

Figure 3-2. Accessible Holes for HR and OC Mirror Adjustment

e. Optimize power:
 Make small adjustments to the horizontal angle of HM mirror and
observe the output power.
 Once a maximum is found, adjust the vertical control of HM mirror to
maximize power.
 Make small adjustments to the horizontal angle of HR mirror and
observe the output power.
 Once a maximum is found, adjust the vertical control of HR mirror to
maximize power.
 Repeat the optimization steps with both the HR and HM until there is
no significant performance improvement.
 If the laser is still not within 5% of the original power or not stable,
repeat the eDrive current optimization, and HR / HM adjustment until
there is no significant performance improvement.
 If the laser power can't be restored to the specification, or the laser is
not stable, then the "walking the cavity" procedure can be tried.
Walking the cavity is sometimes required to optimize the laser and
involves combining mirror mount adjustments.
 Reduce current by 1A while making coarse adjustments. Return
current to normal when making fine adjustments.
 Make a horizontal adjustment to the HR mount. Recover the laser
power by making a similar adjustment to the horizontal control of
the HM mount.
 Continue if improvement is noted. If there is no improvement, try
the opposite direction.
Chapter Three: Laser Optimization and Tuning
ACCESS HOLES FOR
HM MIRROR ADJUSTMENT
23 Patara End-Pumped Laser Quick Start Guide
Approved for Public Release; NG19-1901