In this paper, we propose and experimentally demonstrate a pressure sensor based on birefringent single mode
fiber FP cavity using optical heterodyne. The proof of concept device consists of a light source, a polarizer controller,
a modulator, a RF generator, a single mode fiber Fabry-Perot cavity, a strain inspector, an erbium doped fiber amplifier,
a filter, a polarizer, an optical spectrum analyzer, and a digital communication analyzer. The dynamic range of the
proposed sensor is explored. The results demonstrate the new concept of fiber pressure sensors and the technical
feasibility for pressure measurements.