BibTex format
@phdthesis{Gardner:2025,
author = {Gardner, R},
title = {Spectral purity of spontaneous parametric down conversion in a triply resonant cavity},
year = {2025}
}
RIS format (EndNote, RefMan)
TY - THES
AB - Spectrally pure, highly squeezed light generated from cavity–enhanced spontaneous parametric downconversion is forseen to have uses in a wide range of applications, in optical quantum science andtechnology. This thesis demonstrates that type II spontaneous parametric down conversion in abirefringent, triply resonant cavity can be used to isolate squeezing in a single pair of broadband signaland idler field modes. To do so, the relationship between the cavity birefringence and finesses, andcorresponding conditions which maximise the spectral purity of the cavity output are determined. Thedesign and construction of a prototype cavity, which uses a KTP crystal, along with cavity finessesof approximately 100 for the pump field and 200 for the signal and idler fields is outlined in detail.Photon timing and photon statistics tests are performed on this protype, verifying its design andcontrol over the spectral purity of the cavity output. It is found that the resulting squeezing can bemade approximately spectrally pure with an effective mode number of = 1.25. Interference testsare also developed as a tool to characterise the spectral degeneracy of the signal and idler fields, andan interference visibility dip of = 88% is observed.
AU - Gardner,R
PY - 2025///
TI - Spectral purity of spontaneous parametric down conversion in a triply resonant cavity
ER -