finesse.detectors.field_detector.FieldDetector

Overview

class finesse.detectors.field_detector.FieldDetector(name, node: Node, f)[source]

Bases: Detector

Outputs an array of the higher order modes amplitudes at a particular node and frequency. The mode ordering is given by Model.homs.

This detector can only be used on optical nodes.

Parameters:
namestr

Name of newly created detector.

nodeNode

Node to read output from.

ffloat

Frequency of light to detect (in Hz).

Examples

>>> import finesse
>>> model = finesse.Model()
>>> model.parse('''
    laser l1
    gauss g1 l1.p1.o w0=1m z=0
    m m1 R=1 T=0 xbeta=1e-9 ybeta=3e-8
    link(l1, m1)
    modes(maxtem=1)
    fd fd1 m1.p1.o 0
''')
>>> out = model.run()
>>> print(out['fd1'])
array([
    0.99999998+0.00000000e+00j,
    0+1.77157478e-04j,
    0+5.90524926e-06j
])