[Briana, Ian]

Mounted 4 mirrors for 780 nm laser (not labelled yet). Need 8-32 x 1/2" screws to finish mounting fifth 780 nm mirror. We don't have the nonlinear crystal/lenses yet so we pretended it existed while we started alignment with the last two 1550 nm mirrors. Unfortunately after exiting the Faraday isolator, beam height was steadily decreasing by the time the light reached the far upper right mirror (see Full Schematic attached yesterday). I realigned up to the waveplate but the Faraday isolator may need to be put in a mount that can translate up and down to maintain constant beam height. Also, based on the board size, there might not be enough room for the previously placed 75 mm lenses in the schematic (focal lengths are too big) so the 50 mm lens distances should work. Also, we may want to collimate the 1550 nm beam before it reaches the lenses before the small nonlinear crystal, but maybe the beam size will be sufficiently small that we don't need to do that. 

The next plan is to put together the 780 nm laser. The L780P010 laser diode has maximum optical power of 12 mW with maximum current 40 mA. We can expect that the current to achieve the maximum optical power is lower than 40 mA. Optimal temperature is probably 20-25 degrees Celsius. Initial laser schematic is uploaded. We will probably need the antistatic wrist bracelet while setting up the laser.  The current limit of the current controller is 500 mA, covering the current supply's max 40 mA. 

If the label maker ever glitches, freezes, flashes when you turn it on, or simply dies, it's probably the battery. We finished work and left around 4:13 pm.