Using_pulse_sequence

Beside outputting fixed frequency RF signal, the main functionality of the Pulser is to generate a pulse sequence to do experiment in atomic physics. Usually, experiment in atomic physics consists of a sequence of some switching of laser light by modulation of RF signal driving the AOMs and/or controlling mechanical shutters. The sequence is repeated many times to build-up enough statistics in the data acquired from the experiment. So in this tutorial, we will see how we can program pulse sequences to the Pulser.

Programming a pulse sequence

We show here a simple example that allows us to program a pulse sequence to the system and run it. I show here a python script that does exactly that. We will then go through line-by-line later.

from labrad.units import WithUnit
from treedict import TreeDict
import labrad

cxn = labrad.connect()
p = cxn.pulser

p.new_sequence()

p.add_ttl_pulse('ttl_0', WithUnit(0, 'ms'), WithUnit(100, 'ms'))
p.add_ttl_pulse('ttl_0', WithUnit(200, 'ms'), WithUnit(100, 'ms'))

p.program_sequence()

p.start_number(1)
p.wait_sequence_done()
p.stop_sequence()