List of Footnotes

1 In many implementations of numerical matrix solvers the input vector is also called the right-hand side vector.
2 Note that in other publications the tuning or equivalent microscopic displacements are sometimes defined via an optical path-length difference. In that case, a tuning of 2π is used to refer to the change of the optical path length of one wavelength, which, for example, if the reflection at a mirror is described, corresponds to a change of the mirror’s position of λ0∕2.
3 The signal sidebands are sometimes also called audio sidebands because of their frequency range.
4 The term effective refers to that amount of incident light, which is converted into photo-electrons that are then usefully extracted from the junction (i.e., do not recombine within the device). This fraction is usually referred to as quantum efficiency η of the photodiode.
5 Please note that in the presence of losses the coupling is defined with respect to the transmission and losses. In particular, the impedance-matched case is defined as T1 = T2 ⋅Loss, so that the input power transmission exactly matches the light power lost in one round-trip.
6 Also known as the far-field angle or the divergence of the beam.
7 Please note that this formula from [50Jump To The Next Citation Point] is very compact. Since the parameter q is a complex number, the expression contains at least two complex square roots. The complex square root requires a different algebra than the standard square root for real numbers. Especially the third and fourth factors can not be simplified in any obvious way: ( )1∕2( ∗ )n∕2 ( n+1∗n )1∕2 qq(0z) q0qq∗0q((zz)) ⁄= qq0n+1q(z)(q∗0zn) !
8 [50Jump To The Next Citation Point] states that the indices must obey the following relations: 0 ≤ |l| ≤ p. However, that is not the case.