Raman scattering effects on correlated photon-pair generation in chalcogenide

Alex S. Clark*, Matthew J. Collins, Alexander C. Judge, Eric C. Mägi, Chunle Xiong, Benjamin J. Eggleton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


In this paper we investigate uncorrelated noise from spontaneous Raman scattering (SpRS) and its effect on photon-pair generation in chalcogenide (As2S3). We measure a coincidence-to-accidental ratio (CAR) of 4.2 in a 7 cm As2S3 single-mode fiber, with enhancements from our previous result attributed to pulsed pumping and cooling. Using an analytical model we characterize the magnitude of the SpRS at different temperatures. Our analysis shows that even after cooling to liquid nitrogen temperature (77 K), SpRS is still significant. For large detunings from the pump, the dependence on temperature for the Stokes SpRS intensity becomes negligible, so cooling is not a complete solution to improve the quality of the photon source.

Original languageEnglish
Pages (from-to)16807-16814
Number of pages8
JournalOptics Express
Issue number15
Publication statusPublished - 16 Jul 2012
Externally publishedYes


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