attune

Tools for tuning optical parametric amplifiers and multidimensional spectrometers.

Documentation is available at https://attune.wright.tools/en/latest/.

Overview

attune has three primary jobs:

1. attune parses calibration data to find optimal motor positions

   # data has scans of a motor position ("OPA1_SHS_crystal") against a signal
   # ("signal") for a set of second harmonic signal color setpoints
   # ("opa_color")
   calibration_data = wt.open(path_to_data.wt5)
   calibration_data.transform("opa_color", "motor")
   args = {
       "data": calibration_data,
       "channel": "signal",
       "arrangement": "SHS",
       "tune": "SHS_crystal",
       "instrument": "OPA1",
   }
   tuned_opa1 = attune.intensity(**args)
   

2. attune organizes optimal motor positions. The motor positions are stored in a hierarchy of mappings. Beginning at the lowest level:

   • Tune : a map of OPA color (the "independent") to positions of a single motor (the "dependent").

     my_tune = attune.Tune(
         independent=[450, 600, 700],
         dependent=[3.225, 2.332, 1.987]
     )  # relate color to bbo angle
     

   • Arrangement : a collection of Tunes that define a concerted process (e.g. to generate idler photons, one might move several motors (bbo, g1, etc.))

     idler = attune.Arrangement("idler", dict(bbo=my_tune, g1=my_other_tune))
     

   • Instrument : a collection of Arrangements (e.g. an OPA may have signal and idler)

     my_opa = attune.Instrument({"idler": idler, "signal": signal}, name="opa1")
     

     Note: arrangements can be called as tunables if they exist in the same instrument. This can allow nested naming

     shi = attune.Arrangement(Dict(
         idler = Tune(shi_colors, idler_colors), 
         sh_crystal = Tune(shi_colors, angles)
     )) 
     

3. attune stores motor mappings and remembers them through version tracking.

   • save a new instrument (or update an existing one)

     attune.store(my_opa)
     

   • lookup a saved instrument (by name)

     attune.catalog()  # lists all saved instruments
     my_opa = attune.load("opa1")  # fetches the most recent version of the instrument
     my_previous_opa = attune.undo(my_opa) # fetches the previous version of the instrument
     my_old_opa = attune.load("opa1", time="yesterday")  # optional kwarg specifies the version by time of usage    
     

Notes

• attune uses default units of nanometers ("nm") for its independent variables. At this time, units cannot be changed, so alternate units must be handled externally (PRs are welcome!). WrightTools calibration data is automatically converted into "nm" units for parsing.