Pump power dependence of second order correlation in nondegenerate SPDC

Charles Kim; Gary Kanner

doi:10.1117/12.830776

26 August 2009 Pump power dependence of second order correlation in nondegenerate SPDC

Charles Kim, Gary Kanner

Proceedings Volume 7465, Quantum Communications and Quantum Imaging VII; 74650J (2009) https://doi.org/10.1117/12.830776
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

We observed the second order correlation peak for nondegenerate spontaneous parametric down conversion (SPDC) of a pulsed pump at 532 nm into 810 nm and 1550 nm entangled beams. We used a Si avalanche photodiode (APD) to detect the 810 nm photons, and an InGaAs APD to detect those at 1550 nm. We defined both a visibility and signal-to-noise ratio (SNR) based on the data, which were obtained at various pump powers. In contrast to classical imaging systems, for which SNR increases monotonically with transmitted power, the SNR for the correlation peak in our setup exhibited a gradual decay as the pump power increased. We derived an empirical relation for the SNR, which was inversely proportional to the square root of pump power.

Citation Download Citation

Charles Kim and Gary Kanner "Pump power dependence of second order correlation in nondegenerate SPDC", Proc. SPIE 7465, Quantum Communications and Quantum Imaging VII, 74650J (26 August 2009); https://doi.org/10.1117/12.830776

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