Koheras HARMONIK
Fiber Coupler Installation Guide
2
Step 1: Mount the optical flange adapter
a
Turn off laser power.
b
Insert the four M2x6 mounting screws with washers through the
holes in the flange of the adapter.
c
Make sure the adapters are orientated with the fundamental/SHG
output as shown with respect to the radially arranged pin screws.
d
Slightly tighten the mounting screws using a 50HD-15 hex key or
driver.
Step 2: Align the adapter
a
Insert the iris diaphragm into the flange adapter.
b
Minimize the iris diaphragm aperture.
c
Set the laser to the lowest-possible power and turn it on.
d
Measure the transmitted output power using a suitable power
meter.
e
Maximize the transmitted power by laterally moving the flange
adapter.
f
Tighten the four mounting screws while taking care not to move
the flange adapter from the maximum power position.
g
Remove the iris diaphragm.
h
Measure the free space output power for a later comparison to the
fiber coupled power to calculate the coupling efficiency.
Step 3: Mount the fiber coupler
a
Insert the fiber coupler into the adapter flange.
b
Make sure the fiber coupler has the same orientation as depicted
in the figure on the right. The flat surface has to be aligned
horizontally - perpendicular to the laser output polarization.
c
Tighten the three tapered pin screws to fix the fiber coupler in the
adapter flange.
“pin screws”
e
