Tsunami - Beckman Institute Laser Resource Center

Tsunami
b. Place a white card with a 5 mm diameter hole in it between M4
and M5 SO the hole is centered on the reflected fluorescent image
from M4.
c. Direct the reflected image from M10 back through the hole in the
card and overlap it with the image corning from M4.
To determine which reflected image comes from Mlo, watch the
M5 side of the card and slightly adjust Mlo until you see which
image moves.
d. Remove the card and lasing should begin.
e. Turn the pump laser up to the optimum power found in step 8.
17. Vertically and horizontally adjust Mlo and M1 for maximum output
power.
a. Adjust the two mirrors vertically, one at a time, for maximum
output power.
Iterate until maximum output power is achieved.
b. Repeat, using the horizontal controls.
c. Iterate steps a and b until no further increase in power is measured.
d. To further optimize output, walk the cavity beam to align it to the
pump beam in the rod.
Refer to chapter 7, "Operation: Optimizing Laser Output."
18. Set the laser output wavelength for the peak wavelength of the optics
set installed. Refer to the tuning curves at the end of chapter 3. A
monochromator and an ir viewer are required.
a. For a fs-configured laser, install the slit and adjust it for output
peak wavelength, then continue with step 19.
For information on installing the slit, refer to "Converting Between
fs and ps Configurations: ps to fs Conversion" later in this
chapter. Remember to close the shutter during installation.
b. For ps systems, install and align the bi-fi, then adjust the bi-fi for
output peak wavelength. When finished, proceed with step 19.
Refer to "Selecting, Installing, and Aligning the Birefringent
Filter ..." later in this chapter.
19. Adjust the Ti:sapphire rod for best output.
a. Release the two screws on the rod translation stage that lock it in
place (Figure 6-5)
b. Move the rod up and down using the translation control (top
knob) and position the rod near its center of travel so that a
minimum amount of scatter is observed on M2.