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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 15 — Jul. 16, 2012
  • pp: 16145–16153

Scalable fiber integrated source for higher-dimensional path-entangled photonic quNits

Christoph Schaeff, Robert Polster, Radek Lapkiewicz, Robert Fickler, Sven Ramelow, and Anton Zeilinger  »View Author Affiliations


Optics Express, Vol. 20, Issue 15, pp. 16145-16153 (2012)
http://dx.doi.org/10.1364/OE.20.016145


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Abstract

Integrated photonic circuits offer the possibility for complex quantum optical experiments in higher-dimensional photonic systems. However, the advantages of integration and scalability can only be fully utilized with the availability of a source for higher-dimensional entangled photons. Here, a novel fiber integrated source for path-entangled photons in the telecom band at 1.55µm using only standard fiber technology is presented. Due to the special design the source shows good scalability towards higher-dimensional entangled photonic states (quNits), while path entanglement offers direct compatibility with on-chip path encoding. We present an experimental realization of a path-entangled two-qubit source. A very high quality of entanglement is verified by various measurements, i.a. a tomographic state reconstruction is performed leading to a background corrected fidelity of (99.45±0.06)%. Moreover, we describe an easy method for extending our source to arbitrarily high dimensions.

© 2012 OSA

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(130.0130) Integrated optics : Integrated optics
(270.0270) Quantum optics : Quantum optics

ToC Category:
Integrated Optics

History
Original Manuscript: March 14, 2012
Revised Manuscript: April 19, 2012
Manuscript Accepted: April 19, 2012
Published: July 2, 2012

Citation
Christoph Schaeff, Robert Polster, Radek Lapkiewicz, Robert Fickler, Sven Ramelow, and Anton Zeilinger, "Scalable fiber integrated source for higher-dimensional path-entangled photonic quNits," Opt. Express 20, 16145-16153 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-15-16145


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