Photon-pair generation in photonic crystal fibre with a 1.5 GHz modelocked VECSEL
- Morris, Oliver J.
- Francis-Jones, Robert J. A.
- Wilcox, Keith G.
- Tropper, Anne C.
- Mosley, Peter J.
DOIAbstract
Four-wave mixing (FWM) in optical fibre is a leading technique for generating high-quality photon pairs. We report the generation of photon pairs by spontaneous FWM in photonic crystal fibre pumped by a 1.5 GHz repetition-rate vertical-external-cavity surface-emitting laser (VECSEL). The photon pairs exhibit high countrates and a coincidence-to-accidental ratio of over 80. The VECSEL's high repetition-rate, high average power, tunability, and small footprint make this an attractive source for quantum key distribution and photonic quantum-state engineering
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