Tsunami - Beckman Institute Laser Resource Center

Tsunami
Converting Between fs and ps Configurations
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DANGER: LASER RADIATION
This procedure requires you to replace optics while using the laser at
high power. For safety, close the pump laser shutter every time you
change an optic, and only open it during alignment. Protect yourself
with appropriate eyewear at all times.
CA UTlON
Always use clean finger cots or powderless gloves when handling optics.
WA RNlNG
Tsunami should meet specified power for the installed optic set before
changing optic sets. Refer to chapter 7, "Operation: System Start-up,"
and to the specifications listed in Table 3-1 and Table 3-2.
The Tsunami laser comes in several configurations:
* fs standard configuration Model 3960
fs Lok-to-Clock Model 3960C
fs Model 3960D (Lok-to-Clock upgradeable, i.e., without Model 3930
electronics module or M4 PZT mirror)
ps-only standard configuration Model 3950
ps-only Lok-to-Clock configuration Model 3950C
ps Model 3950D (Lok-to-Clock upgradeable, i.e., without Model
3930 electronics module or M4 PZT mirror)
These fslps configurations differ in three ways:*
Output coupler coating.
Method of wavelength selection: a slit for the fs version, and a
birefringent filter (bi-fi) for the ps versions.
Method of dispersion compensation: a prism sequence for the fs version,
and a Gires-Tournois interferometer (GTI) for the ps versions.
* These components and differences are discussed in chapter 3, "Laser Description."