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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 3 — Mar. 1, 2012
  • pp: 434–442

Experimental studies in generation of high-purity photon-pairs using cascaded χ(2) processes in a periodically poled LiNbO3 ridge-waveguide device

Shin Arahira, Naoto Namekata, Tadashi Kishimoto, and Shuichiro Inoue  »View Author Affiliations


JOSA B, Vol. 29, Issue 3, pp. 434-442 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000434


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Abstract

We report detailed experimental studies in a single wavelength-band system of correlated photon-pair generation in a 1.5 μm telecommunication wavelength-band using cascaded χ(2):χ(2) processes, second-harmonic generation, and the following spontaneous parametric down conversion (c-SHG/SPDC), in a periodically poled LiNbO3 (PPLN) ridge-waveguide device. By using a PPLN module with 600%/W of the SHG efficiency, we achieved a coincidence-to-accidental ratio (CAR) of 2380 at 1.8×104 of the mean number of the signal photon per pulse. Detailed investigation on the origin of uncorrelated noise photons was also discussed in this paper. We revealed that the noise photons mainly originated from spontaneous Raman scattering induced in pigtail optical fibers and also that the PPLN device itself had poor contribution to the noise photons. This feature of the c-SHG/SPDC process is promising for the realization of a noise-photon-free, high-purity quantum entangled photon-pair source.

© 2012 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(270.4180) Quantum optics : Multiphoton processes
(270.5565) Quantum optics : Quantum communications

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: September 16, 2011
Manuscript Accepted: November 11, 2011
Published: February 23, 2012

Citation
Shin Arahira, Naoto Namekata, Tadashi Kishimoto, and Shuichiro Inoue, "Experimental studies in generation of high-purity photon-pairs using cascaded χ(2) processes in a periodically poled LiNbO3 ridge-waveguide device," J. Opt. Soc. Am. B 29, 434-442 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-3-434

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