High-temperature type IIa gratings in 12-ring photonic crystal fibre with germanosilicate core

K. Cook; A. A. P. Pohl; J. Canning

doi:10.2971/jeos.2008.08031

Journal of the European Optical Society - Rapid publications, Vol 3 (2008)

High-temperature type IIa gratings in 12-ring photonic crystal fibre with germanosilicate core

K. Cook, A. A. P. Pohl, J. Canning

Abstract

The inscription of efficient Bragg gratings (>20 dB) in 12-ring photonic crystal fibre with a germanosilicate doped core without the need for hydrogen loading using 193 nm is demonstrated. We show the characteristic rollover from type I grating to type IIa – the first observation of a type IIa grating in structured optical fibre. The type IIa grating is shown to survive up to 700°C before any degradation in transmission or reflection takes place.

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