Chapter 5 Laser Unit
5.4 LU4A Four-laser Module A
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4
Adjusting to give maximum Ar laser light transmission through the fiber
Measure the intensity of the Ar laser light with the power meter. Adjust the beam shift part and the
screws, "H" and "V," on the optical fiber side of the optical fiber coupling device to get the maximum
intensity.
As a guideline for the efficiency of the Ar laser through the optical fiber, the intensity at the tip of the
optical fiber is at least 50% of the intensity before entering the optical fiber coupling device.
Figure 5.4-100
1. Attach the tip of the optical fiber onto the power
meter tool.
Figure 5.4-101
2. Rotate the whole L3 beam shift part by hands and
adjust the angle to get the maximum intensity of the
Ar laser light.
3. Rotate the setscrew for the vertical adjustment on
the L3 beam shift part and adjust to get the
maximum intensity of the Ar laser light.
Figure 5.4-102
4. Rotate the adjustment screws "H" and "V" on the
optical fiber side of the optical fiber coupling device
to maximize the laser intensity.
5. Repeat Step 2 to Step 4 to maximize the Ar laser
intensity.
Rotate by hand
Vertical setscrew
(farther from the axis A)
Axis A
Adjustment screw on the H fiber side
Adjustment screw on the V fiber side
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