Continuum Surelite EX 10, Operation And Maintenance Manual

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Appendix A: PIV Operation and Maintenance
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WARNING!
Be sure to wear goggles and observe all safety
procedures.
3. Also allow any external pulse timing control circuitry to warm up.
4. Open the 1,064 nm output shutter of each laser.
5. After waiting at least 20 minutes, you may wish to tune the PIV doubling crystal.
Use the SHG toggle switch mounted on the laser bench to change the crystal angle.
A power meter in the output will aid in finding the angle yielding maximum energy.
6. Push the shutter buttons to close both laser intracavity shutters.
7. If controlling the lasers externally, begin sending the desired pulse sequence to
both of them.
8. If desired, adjust the beam separation (see the
9. Beam alignment and Beam power balance sections, below).
10. Push the shutter buttons again to open both intracavity shutters; then raise the PIV
beam dump to begin PIV operation.
Shutdown
1. Turn off both YAG lasers; refer to their manuals for details.
2. Lower the PIV beam dump to engage it.
3. Turn off any timing pulse generator.
Optical adjustments
To maintain best PIV performance, it is occasionally necessary to coalign both beams,
balance their energies and adjust the doubling crystal angle. Procedures to perform these
operations follow below.
Adjustable optics
See Figure 56 . Laser B beam steering mirrors (10a) and (10b), and output steering
dichroics (13a) and (13b) all use the same mounts. Each mount has vertical and horizontal
adjustments. It is unnecessary and undesirable to move the waveplates (9 and 3) or the
dielectric polarizer (11) during any of these adjustments.