
3.INSTALLATION B-70315EN/02
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(5) Set the conditions of the beam output program as follows:
Output = Rated output
Duty = 100 %
Duration = See the following table.
Perform internal discharge with a rated output specified. If actual
output Pa differs from the specified output, mode shape
comparison becomes difficult. So, modify the command so that
the output difference is suppressed to within ±2%.
Example
With the C4000-E, setting is made to output 4080 W to
3920 W.
Model Duration
C1000-E 4 sec
C2000-E 4 sec
C4000-E 2.5 sec
C5000-E 1.5 sec
C6000-E 2.5 sec
(6) Direct the drier so that it blows air at 45° to the acrylic block,
then output the beam. If air is not provided correctly, the acrylic
vapor will catch fire. If fire occurs, the mode depth may become
shortened.
The following two types of mode patterns are collected:
Cold mode:
A pattern is obtained after the oscillator is left in the base
discharge state for at least five minutes to let the resonator
cool down.
Hot mode:
A pattern is obtained immediately after internal discharge
with the rated output is performed for two to three minutes.
(7) Record the directions (X direction, Y direction), output
conditions, and drier blowing direction for the burn pattern.
From the hot mode pattern, check for output coupler deformation
and dirt in the internal mirrors.
If there is a problem, align the resonator of the oscillator, or clean
or replace mirrors by following the procedure described in
Section 8.3.2.