SidebandLock

Class Arguments

Argument	Type	Default Value
rf_source	RFSource
sideband_order	np.int32	1
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.SidebandLock",
        "arguments": {
            "rf_source": "<mandatory parameter (RFSource)>",
            "sideband_order": 1,
            "settle_time": 0,
            "blind": false,
            "lock_offset": 0.0,
            "harmonic": 1,
            "debug_output": false
        }
    }
}

Class Description

class atomiq.components.lock.SidebandLock(rf_source, sideband_order=np.int32(1), *args, **kwargs)

Bases: DetunableLock

Lock on a sideband modulated onto the laser

This kind of lock is frequently used when locking on tunable sideband to the transmission signal of a stable cavity. The offset frequency for the sideband is generated by an RF source and can be changed at runtime. Thus the lock point can be detuned.

Parameters:

• rf_source (RFSource) -- RF source that determines the sideband frequency.

• sideband_order (int32) -- Order of the sideband the laser is locked to [.., -2, -1, 1, 2, ...] (default 1)

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

kernel_invariants = {'rf_source', 'sideband_order'}

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)