Tempest Nd:YAG Laser Operator’s Manual
56
• The water reservoir has been filled with distilled water.
• The umbilical from the laser head is securely attached to the power
supply.
• The interlock shorting plug is secured in the socket on the back of the
power supply.
• If the external interlock is utilized, ensure that the switch on the door
interlock or other device is activated.
Procedure 2. Laser starts, but no light is emitted
When the laser is in the standby mode pressing the start button will cause
the laser to begin firing. The LED above the fire button on the control
panel should flash at the rep rate the laser is firing.
• Check that the mechanical shutter is open.
• Check that the flashlamp voltage is set to the maximum.
• For internal triggering, check that the flashlamp and trigger select
switches on back of the power supply are both in the INT (up)
position.
• For external triggering, check that the flashlamp and trigger select
switches are in the desired positions. Check that TTL pulses are
present at the BNCs. Check that the Q-switch delay is correct,
typically 180 microseconds.
Procedure 3. Low fundamental output energy
If the laser output energy is low, please check the following points.
• The flashlamp voltage knob is rotated fully clockwise to the highest
energy setting.
• If the optional attenuator is installed, ensure that the attenuator knob
is rotated fully clockwise to the maximum energy/minimum
attenuation setting.
• Check the optics to ensure that they are clean, and that none of the
optics have any burn marks.
Procedure 4. Unstable laser energy
The pulse stability for the Tempest Nd:YAG laser is specified as ± 2% at
1064 nm for greater than 98% of pulses for 10,000 pulses after 30 min
warm up. If the pulse stabilty at 1064 nm does not meet this
specification then check the following.
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