Polarization maintaining index-guided photonic crystal fiber sensor for slowly varying pressure measurement

The paper presents an experimental investigation of slowly varying pressure measurement using the polarization maintaining photonic crystal fiber (PCF) sensor. Versatility of the sensor has been proved by analyzing its response for various types of time varying pressure profiles viz. exponentially decaying, sinusoidally varying and linearly increasing pressure. Temporal behavior of the sensor has been fully characterised. Dependence on temperature has been explored and it is found that the sensor is an attractive choice for applications in harsh environments.