On the Measurement of Two-Photon Single-Mode Coupling Efficiency in Parametric Down-Conversion Photon Sources
Abstract
Photon-based quantum information schemes have increased the need for light sources that produce individual photons, with many such schemes relying on optical parametric down-conversion (PDC). Practical realizations of this technology require that the PDC light be collected into a single spatial mode defined by an optical fibre. In this paper, we present two possible models to describe single-mode fibres coupling with PDC light fields in a non-collinear con figuration, leading to two different results. This is a general approach, including factors such as crystal length and walk-off, non-collinear phasematching and also transverse pump field distribution. We propose an experimental test to distinguish between the two models. The goal is to help clarify open issues, such as how to extend the theory beyond the simplest experimental arrangements and, more importantly, to suggest ways to improve the collection efficiency.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 2004
- Accession Number
- ADA425132
Entities
People
- A. Migdall
- I. P. Degiovanni
- Matthew Ware
- S. Castelletto
Organizations
- National Institute of Standards and Technology