Two-color parametric down conversion

David Castiel; Adam De La Zerda; Alex Hayat; Matty Katz; Tal Mor; Meir Orenstein; Gil Ratsaby; Nadav Yoran

doi:10.1117/12.603360

25 May 2005 Two-color parametric down conversion

David Castiel, Adam De La Zerda, Alex Hayat, Matty Katz, Tal Mor, Meir Orenstein, Gil Ratsaby, Nadav Yoran

Proceedings Volume 5815, Quantum Information and Computation III; (2005) https://doi.org/10.1117/12.603360
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

We propose a point to point quantum channel based on a two-color Spontaneous Parametric Down Conversion (SPDC), that may be applied for a Quantum Key Distribution (QKD) system to gain better security. We use one arm of the SPDC (770 nm - optimal for Si detection) and a Si counter at Alice's side to count the exact number of photons in each pulse. Whenever the arm contains exactly one photon, the correlated photon (1550nm - optimal for fiber transmission) in the other arm is sent via a fiber to Bob. In the experiment we used an Ar^{+} laser of 514.5nm wavelength and a BBO crystal to produce type-I photon pairs. We measured the spectrum of the SPDC and resolved specifically the 770 nm wavelength. The rate of correlated pairs (at 890-1050 nm) from our SPDC source was compared to a non-correlated source. We further developed an InGaAs single photon detector based on Geiger mode APD and achieved 10% quantum efficiency and 5 * 10^{-3} dark counts per 20nsec pulse at a temperature of -35 degrees Celsius.

Citation Download Citation

David Castiel, Adam De La Zerda, Alex Hayat, Matty Katz, Tal Mor, Meir Orenstein, Gil Ratsaby, and Nadav Yoran "Two-color parametric down conversion", Proc. SPIE 5815, Quantum Information and Computation III, (25 May 2005); https://doi.org/10.1117/12.603360

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