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

Iman Jizan, Bryn Bell*, L. G. Helt, Alvaro Casas Bedoya, Chunle Xiong, Benjamin J. Eggleton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)4803-4806
Number of pages4
JournalOptics Letters
Issue number20
Publication statusPublished - 15 Oct 2016


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