Oxygen sensor based on hollow-core photonic crystal fibres

We present a compact oxygen sensor based on hollow-core photonic crystal fibres (PCF). The compact design requires only a very small amount of gas. Both ends of the fibre are inserted into miniaturized vacuum adapters, which should result in an increased gas exchange and prevent fibre contamination. The detection of oxygen could be verified. Proper choice of the specific components (PCF, laser source) allows the detection of other gases.