[Marc, Shalika]

BEAMS ALIGNMENT

We installed power meter on probe beam path between the lens and mirror on the readout part.

We measured the blade distance from last lens on pump injection to be 167 mm and from the probe prism to be 75 mm when the translation stage is at 20 mm.

Blade cutting is at (316,140,20) for horizontal and (256,65,20) for vertical.

We measured waist size and position (100um,94.1mm) for probe beam and (36um,94.8mm) for pump beam.

Also angles of incidence of both beam seems good.

PUMP LASER POWER TUNING

start 1A and HWP = 0deg (within 5deg of minimum)

with 7A ~31mW

with hwp=-0.1deg ~28.9mW

SURFACE CALIBRATION SAMPLE

recovered about R ~13/W at previous position x,y,z = 327.093,119.965,35

started to scan z translation stage and z IU to maximize the calibration factor. Still on-going

We need 25mm long M62-4 pcs

still can not upload pictures/figures.... all data are saved in matlab 'main_script' file at 2024 02 14 cell.