Theoretical Calculation of Joint Spectral Intensity of Type-I BBO Crystal for SPDC

摘要

Spontaneous Parametric Down-Conversion (SPDC) is a second order non-linear quantum optical phenomenon which finds application in quantum communication network and quantum cryptography. One of the important characteristic parameters of SPDC is Joint Spectral Intensity (JSI). In this paper, effect of crystal length on the Joint Spectral Intensity is studied for type-I phase- matching in BBO crystal. The strength of the JSI peak signifies the conservation of energy and momentum in a SPDC process which leads to generation of correlated photon pairs in a particular wavelength. The JSI is observed to decrease with crystal length for BBO crystal in the present study.