Chapter 5 Laser Unit
5.2 C-LU2 Two-laser Unit, and C-LU3 Three-laser Unit
1-112
Figure 5.2-13
11
Laser intensity measurement
At first, maximize each laser intensity. Move off all of movable ND filters from the optical path and
adjust Argon laser to its maximum power. Measure and record the light intensity of each laser emitting
from the coupler with a calibrated laser intensity power meter.
This completes the rough setup of the lasers.
He-Ne2
He-Ne1
Rotate polarizer so that the argon
laser becomes darker.
Direction of polarization of laser
L1
R1
R1
L1
Target (such as paper)
Direction of
polarization
of polarizer
Polarizer-equipped tool
(Push the tool until its
edge surface touches
the dichroic mirror.)
djusting screw
on the incoming
laser side
djusting screw
on the fiber
Coupler
B
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