Lab Protocols

These are the bench protocols the lab follows — the human side of the measurements that the software automates. They are reproduced here as originally written (Spanish/English) so they live alongside the code that implements them.

Protocol	Implemented by	Summary
LED measurement protocol	IVg, It, Wait (≈ MainSequence)	Dark/illuminated transfer curves around the Dirac point, with timed LED exposure and recovery.
LED power calibration	LaserCalibration, find_calibration_voltage	Map LED driver voltage → optical power per wavelength using the Thorlabs power meter.
Short protocol	IVg, It (power & gate sweeps)	Condensed multi-wavelength transfer-curve + photocurrent workflow.

How the protocols map to the software

flowchart LR
    Cal["LED calibration<br/>(LaserCalibration)"] --> V["find_calibration_voltage<br/>→ driver V for target µW"]
    V --> Meas["LED protocol<br/>(MainSequence:<br/>IVg → It → IVg → Wait → IVg)"]
    Meas --> DP["Dirac point (DP)<br/>from IVg"]
    DP --> It["It at DP + Δ"]

• Calibrate first. LaserCalibration sweeps the laser/LED driver voltage and records optical power. find_calibration_voltage then interpolates the voltage needed for a target power (e.g. 7.5 µW).
• Measure around the Dirac point. IVg finds the device's Dirac point (DP); subsequent It runs use gate voltages expressed as DP + Δ V.
• Automate the flow. The MainSequence sequence chains the LED-protocol steps so a full run happens unattended.

Running these as sequences

See Sequences and Tutorial 3. The bundled MainSequence encodes the LED protocol's IVg → It → IVg → Wait → IVg flow.

The protocols

• LED measurement protocol — timing, gate biases relative to the Dirac point, and dark-recovery steps.
• LED power calibration — power-meter setup and per-wavelength voltage calibration, with darkroom precautions.
• Short protocol — a condensed end-to-end recipe for several wavelengths and gate/power sweeps.