2. Writing a QUA program to calibrate your setup

Configuration

A new element is introduced in the setup: an oscilloscope. Its channel 2 is connected to the analog output port number 2 of the OPX controler. A RF signal of frequency 100MHz and duration \(9\mu s\) is sent to the oscilloscope. To take into account the raise time for the AOM, the RF pulse has a longer duration of :math`10.12mu s`.

Not written in the config file, the photo-diode is plugged on the first channel of the oscilloscope.

Program

The experiment is repeated for different values of the amplitude sent to the AOM. The amplitude is ramped from 0 to 0.5V with steps of size 0.00025V (2000 steps). The RF pulse is sent to the AOM. 120ns later, the trigger pulse is sent to the port channel 2 of the oscilloscope, launching the acquisition on channel 1. We acquire \(10\mu s\) of signal and make the mean of it. When both operations are over, repeat the experiment. We measure intensity function of the voltage.