Tsunami Mode-Locked Ti-sapphire Laser
6-2
Equipment Required:
• Spectrometer (optical spectrum analyzer)
• Autocorrelator—Model 409-08 (or equivalent)
• IR viewer, such as a FJW Industries “Find-R-Scope.”
Front-End Alignment
Refer to Figure 6-1(fs configuration) and Figure 6-2 (ps configuration) as
you proceed through the appropriate alignment procedures. The two con-
figurations use common parts from pump beam entry through M
3
and the
procedure is the same for both. From M
4
on, the alignment procedure is
separated into “Cavity Alignment for fs Systems” and “Cavity Alignment
for ps Systems.” Refer to the appropriate section when you finish aligning
M
3
.
1. Close the pump laser shutter and turn on the pump laser. Set it to mini-
mum current.
Refer to the pump laser manual for information on turning it on and
the time required for warm-up.
2. Remove the Tsunami laser head cover.
a. Pull outward on the bottom portion of the four latches, two on each
side, until the latch snaps.
b. Press downward on the cover to relieve pressure on the latches, and
pull the top portion of the latch from the notch in the cover.
c. Use the slotted finger grips on top at each end of the cover to
remove it.
The safety shutter will close when you remove the cover.
Do not move any mirror mounts until specifically told to do so. Do not
change the configuration of the laser at this time, and do not move mir-
rors M
4
or M
5
—all reference might be lost. Instead, first, align the laser
as is, then change its configuration afterward if you wish, following the
instructions later in this chapter.
Caution!
DO NOT remove or adjust mirrors M
6
, M
7
, M
8
, or M
9
, or the prisms in a
fs Tsunami laser. These optics are prealigned at the factory and are not
to be disturbed until specifically told to do so elsewhere in this manual.
A service call may be required if disturbed.
Caution!
The Tsunami is a Class IV High Power Laser. Bypassing the safety
interlock shutter can expose the user to hazardous radiation. Always
wear proper eye protection and follow the safety precautions in Chapter
2, “Laser Safety.”
Danger!
Laser Radiation
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