Tsunami - Beckman Institute Laser Resource Center

Operation
Optimizing Laser Output
1. Place a power meter in front of the Tsunami output window.
2. Open the pump laser shutter. The Tsunami laser should begin lasing if
it was not adjusted since the last time it was used.
3. Adjust Mlo and Mi (Figure 7-2) for maximum output power and note
the power level.
You can often increase output power a little more by "walking the beam."
The following procedure may improve the overlap of the cavity beam and
the pump beam in the rod.
4. Slightly detune Mi vertically (power will decrease). Note the direction
you turned the control.
5. Adjust Mlo vertically for maximum power.
When compared to the power level measured in step 3, did power increase
or decrease If it increased, repeat steps 4 and 5, turning the vertical knob
in the same direction, a little at a time, until power begins to drop. If it
decreased in step 4, turn the vertical tilt control in the opposite direction
and repeat these steps until output power again drops.
Output Coupler (M10)
Horiz. Vert. Prism Dispersion
Compensation Control (fs)
\ \
Slit Wavelength Selector (fs)
Slit Bandwidth Selector (fs)
Blue: Vertical Adjust
Green: Horizontal Adjust
Laser Head Control Panel
Compensation Control (ps)
Mode Locker Photodiode
(ML PD) Connector
Mode Locker (ML)
Wavelength Selector (PS)
Mi GTI (ps) or High Reflector (FS)
Model 3955 (TO 3955)
Signal Connector
Model 3930 (TO 3930)
Signal Connector
LTC Photodiode (LTC PD)
Water Inlet Connector / \ Purge Inlet Connector
Purge Bleed Valve
Water Outlet Connector
Figure 7-2: Tsunami External Laser Head Controls