The configuration analysis of fiber optic interferometer of hydrophones

Abstract

This paper describes a configuration analysis of optical fiber interfermetric hydrophones. We use mathematical methods to compare their characteristics and relation of sensitivity, delay fiber and physical frequency of the Sagnac type interferometer. In the experiment, we use PGC modulation technology and measure the sensitivity of the three types interferometer in this paper proposed. The preliminary results of the acoustic signal sensitivity are as follows: Michelson, compensating type Mach-Zehnder interferometer. Hybrid of a Mach-Zehnder and a Sagnac type interferometer are -201.67, -205.97, -212.47 dB re V/luPa, respectively.

A novel fiber optic interferometer of hydrophone based on Mach-Zehnder hybrid configuration

“…Where S 1 and T 1 are the strain and stress in the circumferential direction, D 3 and E 3 are the displacement and electric field in the radial direction, A is the modulus of elasticity, B is the piezoelectric constant, and C is the dielectric constant. Taken as an application of Newton's second law,…”

“…It has been demonstrated to have better performance than conventional hydrophones. As fiber-sensing technology has advanced, the need for these sensors has been developed for application in a wide range of fields [3]. For example, in fishery application, it is used to detect shoals of fish location, thus helping to track a large amount of fish in deep ocean.…”

Signal processing of Sagnac fiber interferometer used as distributed sensor with wavelets

“…Fiber Sagnac interferometers can be accurate sensors for measuring nonreciprocal effects and have extensive application [1] [2] .…”