Theoretical analysis of collinear spontaneous parametric down conversion properties in BiB3O6

2014 ◽  
Vol 23 (02) ◽  
pp. 1450021
Author(s):  
Meizhi Zhang ◽  
Guangwen Huo
Keyword(s):  
Dielectric Dispersion ◽  
Phase Matching ◽  
Biaxial Crystal ◽  
Type I ◽  
Type Ii ◽  
Entangled Photons ◽  
Parametric Down Conversion ◽  
Effective Phase ◽  
Down Conversion

In this paper, we report on the collinear spontaneous parametric down conversion (SPDC) with quantum theory in angle picture. Based on angle-dependent refractive index of biaxial crystal and the dielectric dispersion, we numerically simulate the effective nonlinear coefficients of BiB 3 O 6 (BIBO) crystal in principle planes. The results indicate that the most effective phase matching scheme is the type I in yz plane, while the secondary options are the type I, type II in xz plane. Considering the derivation of angular phase matching conditions, the calculation is convenient, and it is superior in determination of the spatial distribution of entangled photons.

CALCULATION OF EFFECTIVE NONLINEAR COEFFICIENT IN BIBO FOR SPONTANEOUS PARAMETRIC DOWN CONVERSION

2013 ◽  
Vol 22 (01) ◽  
pp. 1350010 ◽  
Author(s):  
GUANGWEN HUO ◽  
TONGYI ZHANG ◽  
GUANGHUA CHENG ◽  
WEI ZHAO
Keyword(s):  
Nonlinear Crystal ◽  
Nonlinear Coefficient ◽  
Phase Matching ◽  
Double Phase ◽  
Parametric Down Conversion ◽  
Entangled Photon Pairs ◽  
Effective Phase ◽  
Matching Schemes ◽  
Down Conversion ◽  
Effective Nonlinear Coefficient

We theoretically investigate the effective nonlinear coefficient d eff of spontaneous parametric down-conversion (SPDC) process in biaxial nonlinear crystal BiB3O6 (BIBO). We solve the Fresnel equations in the collinear degenerate down-converted configuration, and get the relations of phase-matching angles. Considering the double phase-matching, we compute the phase-matching angles with different wavelength. Furthermore, we simplify the expression of effective nonlinear coefficient out of the principal planes, and numerically calculate it varying with the angle and wavelength. These results indicate that there are three effective phase-matching schemes for SPDC which can be used to construct a system to generate entangled photon pairs.

Spontaneous parametric down-conversion using a pulse train

2014 ◽  
Vol 23 (03) ◽  
pp. 1450032
Author(s):  
Amitabh Joshi ◽  
Shoukry S. Hassan
Keyword(s):  
Pulse Train ◽  
Frequency Comb ◽  
Single Pulse ◽  
Type I ◽  
Type Ii ◽  
Parametric Down Conversion ◽  
Down Conversion

The process of spontaneous parametric down-conversion (SPDC) is studied for the case in which the pump is a train of pulses. Effects of such a train of pulses (equivalent to a frequency comb) on degenerate collinear type-II SPDC and degenerate collinear type-I SPDC are analyzed using the probability of photon coincidence counts and compared with the case when the medium is pumped by a single pulse.

Observation of the Hong-Ou-Mandel Dip by Using Type-I Spontaneous Parametric Down Conversion Light with a Low-Cost Coincidence Circuit

2017 ◽  
Vol 67 (12) ◽  
pp. 1528-1533
Author(s):  
Sung-Wook HAN ◽  
Munkhbaatar PUREVDOR ◽  
Hyung-Nam NOH ◽  
Heonoh KIM ◽  
Myung-Whun KIM*
Keyword(s):  
Low Cost ◽  
Type I ◽  
Coincidence Circuit ◽  
Parametric Down Conversion ◽  
Down Conversion
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