Tsunami - Beckman Institute Laser Resource Center

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Tsunami
Opto-Mechanical Controls
ps Configuration
The following describes opto-mechanical controls specific to Tsunami
lasers configured for ps operation. Refer to Figure 4-2 and Figure 4-3.
MI Gires-Tournois interferometer (GT1)-used to compensate for dispersion
and to adjust for the shortest pulse. The GTI replaces the HR used
in the fs configuration. Its vertical and horizontal adjustments allow you to
align the laser cavity and to optimize output power and mode quality.
These controls are available when the laser head cover is in place.
Birefringent filter (bi-fi) wavelength selector-used to select the laser
wavelength. The micrometer control is available when the laser head cover
is in place.
Model 3955 Electronics Module Controls
Front Panel
The following is a description of the displays and controls on the front
panel of the Model 3955. Refer to Figure 4-5.
P HOT0 Dl 0 D E indicator--displays relative photodiode signal strength with
full-scale = maximum signal. This is an uncalibrated reference indicator.
STATUS: PULSING mode locker indicator-when lit, it indicates the
system is mode locked. When off, it indicates no pulses are detected.
STATUS: ENABLE mode locker indicator-when
locking is enabled.
lit, it indicates mode
STATUS mode locker enableldisable button-turns on or off the rf power
to the AOM. Note: even when rf power is off, power to the heater is still
applied.
PHASE display-indicates the relative position of the fine PHASE control.
This is an uncalibrated reference indicator.
L
L PHOTODIODE STATUS PHASE POWER J
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Figure 4-5: Model 3955 Electronics Module Front Panel Controls and Indicators 11 -,