User`s manual

11. Moving narrow paper strip through beams between AM1

and AM2 find common for AM1 and AM2 focal point.

12. With horizontal control of AM2 tune the beams

configuration to get 40-41 cm distance between AM2 and

common focal point.

13. Place the titanium : sapphire crystal assembly to the common

for AM1 and AM2 focal point. A movement of the lowest

translation stage should be parallel to the M5-AM1 beam.

14. Aligned multipass configuration will be broken after the step.

By horizontal control of M5 take all beams to one spot on the

left surface of the titanium : sapphire crystal. After that, restore

eight passes configuration slightly moving AM1 translation

stage in a direction “to the user”, and simultaneously adjusting

horizontal control of AM1.

15. Using controls of Ti:sapphire assembly and controls of AM1

and AM2 get that:

a) Going to the crystal input beams should intersect in one and

the same point on the crystal surface (use microscope).

b) Going through the AM1 hole output beam should not touch

the edge of the AM1 hole.

16. With help of M6 and M7 direct the output beam to the pulse

compressor.

17. Place substrate beamsplitter anywhere between M6 and M7

and direct reflected beam to pin-photodiode connected with

oscilloscope for amplification control. Watch unamplified

pulses.

COMPRESSOR GRATING ALIGNMENT.

1. Use mirrors M6 and M7 to align the beam though the

apertures A3 and A2.

2. Replace the rotation stage with the grating G2. Set position of

rotation stage to “0”.

3. With rotation stage set so that the zero order beam from the

stretcher grating goes back through aperture A3, adjust the

vertical and horizontal tilts of the grating mount for best

alignment to aperture A3.

4. Set rotation stage at 14 degrees for 800 nm. Littrow (auto

collimated) diffracted beam should go back through A3.