Phase-sensitive tomography of the joint spectral amplitude of photon pair sources

We present a novel measurement technique to perform full phase-sensitive tomography on the joint spectrum of photon pair sources, using stimulated four-wave mixing and phase-sensitive amplification. Applying this method to an integrated silicon nanowire source with a frequency chirped pump laser, we...

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Bibliographic Details
Published in:Optics letters 2016-10, Vol.41 (20), p.4803-4806
Main Authors: Jizan, Iman, Bell, Bryn, Helt, L G, Bedoya, Alvaro Casas, Xiong, Chunle, Eggleton, Benjamin J
Format: Article
Language:English
Subjects:
Amplitudes
Four-wave mixing
Nanowires
Nonlinearity
Phase change
Photons
Spectra
Tomography
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Summary:We present a novel measurement technique to perform full phase-sensitive tomography on the joint spectrum of photon pair sources, using stimulated four-wave mixing and phase-sensitive amplification. Applying this method to an integrated silicon nanowire source with a frequency chirped pump laser, we are able to observe a corresponding phase change in the spectral amplitude that would otherwise be hidden in standard intensity measurements. With a highly nonlinear fiber source, we show that phase-sensitive measurements have superior sensitivity to small spectral features when compared to intensity measurements. This technique enables more complete characterization of photon pair sources based on nonlinear photonics.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.41.004803