[M. Todd, C. Compton]
Camilla had data she took from the CO2Y ISS PDs, (both AC and DC), and we wanted to calibrate those measurements into the laser RIN. Today, we took data for CO2X following the same procedure.
DC values were taken from alog 82262 and DC/AC gains from the pre-amplifier are taken from the dcc diagram. All measurements were taken up to 20kHz.
We had time to do more measurements with various Pulse-Width-Modulation frequencies to see their effect. Interestingly, while the ASD (cts/rtHz) seems to go up with higher PWM frequency, the overall RMS goes down...I think we care more about the RMS RIN, so it may be advantageous to have our PWM at higher frequencies.
List of Figures:
1) RIN of CO2Y laser comparing continuous wave versus PWM at 5kHz
2) RIN of CO2X laser comapring continuous wave (locked vs unlocked) and the PWM at 5, 10, 25 kHz
3) The DC values for the CO2X data are taken from the ndscope trend
Codes:
