Tsunami Mode-Locked Ti-sapphire Laser
6-38
2. Remove the plastic cover from the laser head pc board (3 screws).
3. Disconnect the GTI cables.
a. Disconnect the gray GTI heater cable at connector J
2
on the laser
head pc board (see Figure 6-20).
b. Disconnect the black coaxial cable from the GTI (pull it straight
off), then disconnect it from the J
6
connector on the pc board
(unscrew it).
The black cable can be left in the bottom of the laser head for stor-
age, but it must be disconnected from the pc board because it is a
high voltage connection.
4. Remove the GTI module.
a. Loosen the three screws holding the GTI to the rear mirror plate,
and turn the three D-shaped cam locks so the flat portion of the
cam disengages the GTI mounting ring (Figure 6-21).
b. Slide the GTI from the mirror plate and pull the gray heater cable
through the mount hole, taking care not to snag it on anything.
Store it in its box.
5. Install the high reflector (HR).
a. Verify the correct optic is installed in the mounting ring.
Note the part number printed on the optic barrel. The description
and part number of the correct optic is found in the tables at the
end of Chapter 10, “Options and Accessories.” The v-shaped arrow
on the barrel points to the coated, intracavity surface.
b. Slide the HR mounting ring into the rear mirror plate, turn the three
cam locks so the round portion of the cam captures the ring, and
tighten the screws.
6. Open the shutter and reestablish lasing.
a. Place a white card in front of mirror M
5
.
b. Adjust M
1
vertically and horizontally to overlap the horizontal oval
fluorescent image from
M
1
over the vertical image from M
3
on the
card to form a cross-shaped image (Figure 6-6).
c. Remove the card; lasing should begin.
7. Remove the
M
4
mirror holder from its ps mounting position and install
it into the fs mounting position near the input end of the laser head (see
Figure 6-7).
8. In like manner, remove the
M
5
mirror holder from its ps mounting posi-
tion and install it into the fs mounting position near the output end of
the laser head (Figure 6-7).
During the next two steps, do not disturb the M
4
and M
5
mirror mounts
themselves. Their positions were preset at the factory.
Caution!
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