Characterisation of longitudinal variation in photonic crystal fibre

Abstract

We present a method by which the degree of longitudinal variation in photonic crystal fibre (PCF) may be characterised through seeded four-wave mixing (FWM). Using an iterative numerical reconstruction, we created a model PCF that displays similar FWM phasematching properties across all measured length scales. Our results demonstrate that the structure of our PCF varies by less than 1% and that the characteristic length of the variations is approximately 15 cm.

arXiv comment11 pages, 7 figures

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• General framework for the analysis of imperfections in nonlinear systems
• Photon-pair generation by non-instantaneous spontaneous four-wave mixing
• Microstructured optical fibres for quantum applications: perspective
• Complete evolution equation for the joint amplitude in photon-pair generation
• Group-velocity symmetry in photonic crystal fibre for ultra-tunable quantum frequency conversion