To solve the problem that the current use of optical methods used to detect various gases existing in sensors and signal processing was too complicated, detection sensitivity was not high, detection of the type of gases was single. We used optical phase-shifted grating laser window adjust the differential infrared absorption spectrometry and studied spectrum adjustment and detection signal process...Show More
A certain value, a method to analyze bending sensing rules of long-period fiber grating (LPFG) according to bending curvature, grating length and grating period was reported, based on coupled-mode theory and perturbation approximation. The transmission spectra of the bended LPFG split when the bending curvature reaches a certain value. The two resonant wavelengths of the splitting peaks change con...Show More
