B-70315EN/02 2.INTERNAL STRUCTURE
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2.1 OUTLINE
Fig. 2.1 shows an outline of the structure of the oscillator.
Fig.2.1 Outline of structure
(1) Laser resonator
The resonator consists of an output coupler, a rear mirror, folding
mirrors, discharge tubes, a power sensor unit, etc. Several
discharge tubes are connected in series using folding mirrors,
with an output coupler and a rear mirror placed at the open ends
of the discharge tubes, thus sealing the tubes. The resonator is
fitted with a gas pipe connecting port through which laser gas is
fed into the discharge tubes. A discharge from the electrodes of
the discharge tubes energizes CO
2
molecules, which emit light.
This light is amplified by the stimulated emission that takes place
while the light travels back and forth between the output coupler
and the rear mirror. The resonator is capable of converting
electrical energy to optical energy (10.6-µm single-wavelength
laser beam).
(2) Energization power supply
This is a high-frequency power supply of 2 MHz whose output is
controlled by the CNC. It discharges the laser gas flows through
the discharge tubes to energize CO
2
molecules.