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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 15 — Jul. 16, 2012
  • pp: 16807–16814

Raman scattering effects on correlated photon-pair generation in chalcogenide

Alex S. Clark, Matthew J. Collins, Alexander C. Judge, Eric C. Mägi, Chunle Xiong, and Benjamin J. Eggleton  »View Author Affiliations

Optics Express, Vol. 20, Issue 15, pp. 16807-16814 (2012)

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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.

© 2012 OSA

OCIS Codes
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(190.5650) Nonlinear optics : Raman effect
(270.0270) Quantum optics : Quantum optics

ToC Category:
Quantum Optics

Original Manuscript: May 30, 2012
Revised Manuscript: June 27, 2012
Manuscript Accepted: June 29, 2012
Published: July 10, 2012

Alex S. Clark, Matthew J. Collins, Alexander C. Judge, Eric C. Mägi, Chunle Xiong, and Benjamin J. Eggleton, "Raman scattering effects on correlated photon-pair generation in chalcogenide," Opt. Express 20, 16807-16814 (2012)

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