The sensor’s pressure sensitivity is determined by its gauge
length, which is highly repeatable because the gauge length is
easily controlled with high precision by the splicer. The variation
in sensitivity is within 0.05 nm/psi based on ten sensors prepared
and tested. Generally, the hollow fiber was cleaved with
a length near the desired gauge length to minimize the sensor
size. In addition, compared with the fiber-tip-diaphragm based
sensors, this MEFPI pressure sensor is much easier to fabricate,
resistant to scratches, and has much larger pressure measurement
range.