Possibilities of application of the side-hole circular core fiber in monitoring of high pressures

The common side-hole (SH) fibers have high-pressure sensitivity K-P. Yet, t heir temperature sensitivity K-T is also relatively high, In this paper, th e class of certain structure SH fibers of various core ellipticity is analy zed. It was theoretically proposed and experimentally verified that fibers of low core ellipticity have a very advantageous K-P/K-T ratio, which permi ts the construction of pressure sensors that do not require temperature com pensation. However, this type of fiber can only be used for high-pressure ( above 3 MPa) sensor construction because for lower pressures, the beat leng th is too long.