Ultrabroadband Biphotons Generated via Chirped Quasi-Phase-Matched Optical Parametric Down-Conversion
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2008
- DOI:
- 10.1103/PhysRevLett.100.183601
- Bibcode:
- 2008PhRvL.100r3601N
- Keywords:
-
- 42.50.Dv;
- 42.65.Lm;
- 42.65.Re;
- Nonclassical states of the electromagnetic field including entangled photon states;
- quantum state engineering and measurements;
- Parametric down conversion and production of entangled photons;
- Ultrafast processes;
- optical pulse generation and pulse compression