Crossed crystal scheme for fs-pulsed entangled photon generation in ppKTP
Thomas Scheidl, Felix Tiefenbacher, Robert Prevedel, Fabian, Steinlechner, Rupert Ursin, Anton Zeilinger
TL;DR
This paper introduces a new femtosecond pulsed entangled photon source using a crossed crystal scheme in periodically poled KTP, offering easier alignment and high-quality entanglement for quantum applications.
Contribution
The authors present a novel crossed crystal configuration for femtosecond pulsed SPDC in ppKTP, improving alignment and entanglement quality over traditional bulk BBO sources.
Findings
High-quality polarization entanglement achieved
Easier alignment compared to bulk BBO sources
Suitable for multi-photon quantum applications
Abstract
We demonstrate a novel scheme for femto-second pulsed spontaneous parametric down-conversion in periodically poled KTP crystals. Our scheme is based on a crossed crystal configuration with collinear quasi-phase-matching. The non-degenerate photon pairs are split in a fiber-based wavelength division multiplexer. The source is easier to align than common pulsed sources based on bulk BBO crystals and exhibits high-quality polarization entanglement as well as non-classical interference capabilities. Hence, we expect this source to be a well-suited candidate for multi-photon state generation e.g. for linear optical quantum computation and quantum communication networks.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.