Efficient generation of CV entanglement by triply resonant non-degenerate OPA

Alberto Porzio; Virginia D'Auria; Stefano Fornaro; Salvatore Solimeno; Stefano Olivares; Matteo G. A. Paris

doi:10.1117/12.722940

11 May 2007 Efficient generation of CV entanglement by triply resonant non-degenerate OPA

Alberto Porzio, Virginia D'Auria, Stefano Fornaro, Salvatore Solimeno, Stefano Olivares, Matteo G. A. Paris

Author Affiliations +

Proceedings Volume 6583, Photon Counting Applications, Quantum Optics, and Quantum Cryptography; 65830R (2007) https://doi.org/10.1117/12.722940
Event: International Congress on Optics and Optoelectronics, 2007, Prague, Czech Republic

Abstract

CV entangled CW bright beams are experimentally generated by a Non-degenerate "triply resonant" Optical Parametric Amplifier (NOPA) based on PPKTP type-II crystal below threshold. Operating the OPA at frequency degeneracy makes the down-converted entangled beams able to be optically manipulated for generating different combination of the entangled system. Particular care has been required by the triply resonance condition essential to obtain a suffcient degree of entanglement. The triply resonance condition is pursued by combining temperature phase-matching and crystal tilting in an optical cavity so to optimize the triple resonance condition acting on different independent parameters. Exploiting the dependence of the bipartite system covariance matrix on different combination of this continuous variable two-mode states it can be directly measured using a single homodyne detector and few linear optical elements. The system is actually operating at the University of Napoli-Quantum Optics Laboratory. Preliminary measurements show that CV entanglement is present at the OPO output. This source of CV entanglement can be used for quantum communication purposes. The technical tricks herein implemented are interesting also for realizing triply resonant CW OPOs whose spectral properties and conversion efficiencies are better compared to single and double resonant devices. The quality of entanglement is also improved thanks to the use of a single cavity instead of dual cavities often employed in triply resonant devices. The measurement method can be applied to generic bipartite states made of frequency degenerate but orthogonally polarized modes.

Citation Download Citation

Alberto Porzio, Virginia D'Auria, Stefano Fornaro, Salvatore Solimeno, Stefano Olivares, and Matteo G. A. Paris "Efficient generation of CV entanglement by triply resonant non-degenerate OPA", Proc. SPIE 6583, Photon Counting Applications, Quantum Optics, and Quantum Cryptography, 65830R (11 May 2007); https://doi.org/10.1117/12.722940

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Crystals

Optical parametric oscillators

Homodyne detection

Laser crystals

Nonlinear crystals

Mirrors

Optical amplifiers

Show All Keywords

Keywords/Phrases

Search In:

Publication Years