Angle-Resolved Spectroscopy of Parametric Fluorescence

TL;DR

This paper investigates the angular and spectral properties of parametric fluorescence in a nonlinear crystal using angle-resolved spectroscopy, comparing experimental results with theory, and demonstrating its use as a broadband calibration source.

Contribution

It provides detailed measurements and analysis of parametric fluorescence patterns and efficiency, and introduces its application for instrument calibration.

Findings

Measured angular and spectral distributions of parametric fluorescence.

Compared experimental data with theoretical plane-wave analysis.

Used parametric fluorescence for spectral response calibration.

Abstract

The parametric fluorescence from a nonlinear crystal forms a conical radiation pattern. We measure the angular and spectral distributions of parametric fluorescence in a beta-barium borate crystal pumped by a 405-nm diode laser employing angle-resolved imaging spectroscopy. The experimental angle-resolved spectra and the generation efficiency of parametric down conversion are compared with a plane-wave theoretical analysis. The parametric fluorescence is used as a broadband light source for the calibration of the instrument spectral response function in the wavelength range from 450 to 1000 nm.