WavelengthMeterLock

Class Arguments

Argument	Type	Default Value
wavemeter	StabilizingWavelengthMeterChannel
settle_time	float	0
blind	bool	False
lock_offset	float	0.0
harmonic	np.int32	1
debug_output	bool	False

Bold arguments are mandatory. For more documentation on the listed arguments refer to the class definition below. If parameters appear in this list but not in the class definition below, please recursively check the linked base classes for the definition of the parameter.

Inheritance Diagram

Example Component Dictionary

   {
    "lock_example": {
        "classname": "atomiq.components.lock.WavelengthMeterLock",
        "arguments": {
            "wavemeter": "<mandatory parameter (StabilizingWavelengthMeterChannel)>",
            "settle_time": 0,
            "blind": false,
            "lock_offset": 0.0,
            "harmonic": 1,
            "debug_output": false
        }
    }
}

Class Description

class atomiq.components.lock.WavelengthMeterLock(wavemeter, *args, **kwargs)

Bases: DetunableLock

Lock a laser to an absolute frequency using a wavelength meter

This lock uses a StabilizingWavelengthMeterChannel to measure and stabilize the laser frequency.

Parameters:

• wavemeter (StabilizingWavelengthMeterChannel) -- The stabilizing wavelength meter channel used to measure and control the laser frequency.

• reference_frequency -- The absolute frequency in Hz at which the laser should be locked.

• lock_offset -- The default frequency offset in Hz from the reference frequency (default 0).

• harmonic -- Use this option if the laser is frequency converted but locked to the fundamental. Use 1 for no conversion, 2 for SHG, 4 for FHG, ... (default 1).

• settle_time -- Time in s the lock needs to settle after a detuning of the lock point.

A Parametrizable is an entity that can be controlled by one or more continuous parameter(s)

kernel_invariants = {'wavemeter'}

get_frequency()

Get the absolute frequency of the light exiting the laser in Hz (fundamental frequency x harmonic)

Return type:

float

ramp_detuning(duration, offset_frequency_start=nan, offset_frequency_end=nan, ramp_timestep=nan, ramp_steps=np.int32(-1))

Ramp the lock offset, i.e. the detuning of the laser fundamental from the reference frequency

Parameters:

• duration (float) -- Ramp duration in s

• offset_frequency_start (float) -- Initial lock offset in Hz (at the laser fundamental)

• offset_frequency_end (float) -- Final lock offset in Hz (at the laser fundamental)

• ramp_timestep (float) -- Time in s between two ramp steps

• ramp_steps (int32) -- Number of ramp steps (default -1, i.e. derive from the timestep)

ramp_frequency(duration, frequency_start=nan, frequency_end=nan, ramp_timestep=nan, ramp_steps=np.int32(-1))

Ramp the absolute frequency of the light exiting the laser

Parameters:

• duration (float) -- Ramp duration in s

• frequency_start (float) -- Initial absolute frequency in Hz of the light exiting the laser

• frequency_end (float) -- Final absolute frequency in Hz of the light exiting the laser

• ramp_timestep (float) -- Time in s between two ramp steps

• ramp_steps (int32) -- Number of ramp steps (default -1, i.e. derive from the timestep)

set_detuning(offset_frequency)

Set the frequency of the laser fundamental relative to the reference frequency, i.e. set the lock offset.

Parameters:

offset_frequency (float) -- new lock offset in Hz (at the laser fundamental)

set_frequency(frequency)

Set the absolute frequency of the light exiting the laser

Parameters:

frequency (float) -- The absolute frequency in Hz of the light exiting the laser

set_parameter(value, channel=None)

Parameters:

• value (float)

• channel (str)