Design and test research of a new optical fiber F-P humidity sensing system for modern agriculture environmental monitor

Abstract

Humidity monitoring is more and more emphasized on agriculture. Optical fiber humidity sensor has been paid great attention based on its excellent properties. In this paper, a novel method for the optic fiber F-P sensors based on the optimum double wavelength stabilization technique is put forward to use in humidity monitoring. The controlling system of work point which used for sensor stabilization is designed. DE algorithm stabilization model of sensing system is established. The working wavelength of DWDM and length of F-P cavity are calculated by the DE optimization design method. A sensing system with higher orthogonal precision is designed. The experimental setup of light route test is established. The results show that the light route performance of sensing system is well. This stabilization method is totally passive and offers a high resolution. It can satisfy the stabilization need of optical fiber F-P humidity sensor working point. DE algorithm can be used for the structural optimization design of optical fiber F-P humidity sensor.