19
2.1.1 Marx Bank
If the host laser does not have a Marx bank for the Q-switch, one should be installed before
proceeding.
For injection seeding, the rise time of the waveform should be approximately 30 ns.
2.1.2 Cooling Water Stabilization
The cooling system should be modified to include a regulator such that the temperature of the
Nd:YAG rods is stabilized to within ±1°C.
A typical configuration for achieving this is shown below in Figure 2-2.
Temperature
Regulator
Reservoir
Flow
Switch
Filter
To Laser H ead
From Laser Head
To City Water
From City Water
Pressure
Switch
Heat
Exchanger
Temperature
Switch
Pump
Figure 2-2: Typical Cooling Water Configuration
Note that the water reservoir should be kept at least >75% full. The water in the reservoir acts
as a large thermal mass, damping any rapid changes in the circulating water temperature. This
improves the temperature control of the circulating water and thus improves seeding stability.
2.1.3 Vibration Isolation
Isolating the host resonator from vibration sources is very important for achieving consistent
single mode operation. All electrical components (such as SCRs, inductors, etc.) that produce
vibration should either be removed from the laser head area or mounted on damping material.
In particular, many lasers incorporate a fan to keep the laser head’s temperature fairly evenly
distributed. Such a fan should be remounted on a shock mount.
To Next Page
Loading...
Need help?
General