An all silica photonic bandgap fibre capable of sub dBm-1 transmission in the mid infra-red is presented. This fibre is demonstrated for the first measurement of gas absorption above 3μm using an all silica fibre.
Gayraud, N., MacPherson, W.N., Shephard, J.D., Maier, R.R., Hand, D.P., Jones, J.D., Stone, J., George, A.K. and Knight, J.C., 2006, October. Mid infra-red gas sensing using a hollow-core photonic bandgap fibre. In Optical Fiber Sensors (p. ThA5). Optical Society of America.
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