Ultrabroadband Biphotons Generated via Chirped Quasi-Phase-Matched Optical Parametric Down-Conversion

Authors

Magued B. Nasr, Silvia Carrasco, Bahaa E. A. Saleh, Alexander V. Sergienko, Malvin C. Teich, Juan P. Torres, Lluis Torner, David S. Hum, Martin M. Fejer

Abstract

We generate ultrabroadband biphotons via the process of spontaneous parametric down-conversion (SPDC) in quasi-phase-matched nonlinear gratings that have a linearly chirped wave vector. By using these ultrabroadband biphotons (300-nm bandwidth), we measure the narrowest Hong-Ou-Mandel dip to date, having a full width at half maximum of 7.1 fs. This enables the generation of a high flux of nonoverlapping biphotons with ultrabroad bandwidth, thereby promoting the use of SPDC light in many nonclassical applications.

Journal

Physical Review Letters

Volume

100

Number

18

Date

05/2008
AttachmentSize
Nasr PRL2008579.33 KB