Tempest Nd:YAG Laser Operator’s Manual
16
The power supply controls the Tempest Nd: YAG laser, supplying the
required power and signals to safely operate the laser. The Tempest
power supply is built on three levels, with functional groups separated on
the three different levels.
The power entry module brings AC power to the laser, with the input
line going directly to the line filter and transformer. The upper portion
of the power supply contains the electronics to run the laser.
The closed loop water cooling system is located completely on the lower
level of the power supply. A water pump recirculates the deionized
water from the water-to-air heat exchanger to the laser head. The water
circulates through the pump chamber to keep the temperature of the
YAG rod at an acceptable level. Part of the water flow is directed
through a deionization cartridge to maintain the water purity. The
cooling control board controls the fan attached to the heat exchanger and
monitors the temperature sensor to ensure that the laser operates reliably.
The following table shows the Tempest specifications for the different
models that are available. The specifications are subject to change
without notice.
Table 2-1: Tempest Performance Specifications
Energy
1
1064 nm 532 nm 355 nm 266 nm
Tempest-10 200 mJ 100 mJ 50 mJ 30 mJ
Tempest-20 200 mJ 100 mJ 50 mJ 30 mJ
Tempest-30 180 mJ 90 mJ 40 mJ 20 mJ
Energy stability
2
± 2 % ± 3.5 % ± 6 % ± 7 %
Pulse width
3
3-5 ns 3-5 ns 3-5 ns 3-5 ns
Beam divergence
4
< 1 mrad < 1 mrad < 1 mrad < 1 mrad
Beam pointing
5
< 200 µrad < 200 µrad < 200 µrad < 200 µrad
Jitter ± 0.5 ns ± 0.5 ns ± 0.5 ns ± 0.5 ns
Beam Diameter ~5mm ~5mm ~5mm ~5mm
1. Optical losses due to optional attenuator will reduce maximum
energy by 10%
2. Pulse-to-pulse for 98% of shots after 30 minute warm up
3. Full width half maximum
4. Full angle for 86% of the energy, 1/e
2
point
5. Full angle for 86% of the energy, 1/e
2
point
Power Supply
Electronics
Water Cooling
System
Tempest
Specifications
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