How　to　solve　the　optical　fiber　transmission　dispersion　compensation,　as　well　as　to　achieve　high-speed　data-intensive　wave　of　all-optical　time　division　multiplexing　and　multiplexing　solution,　become　a　major　problem　during　the　study.　Fiber　Bragg　Grating　(FBG)is　an　ideal　passive　sensing　and　signal　demodulation　device,　the　lateral　force　characteristics　of　fiber　Bragg　grating　was　explored,　and　an　experimental　system　ASE100　source　was　built.　Demodulation　results　show　that:　loss　of　polarization　had　maximum　transmittance　spectrum　of　the　main　stop　band;　split　point　was　linear　relationship　with　size　of　the　force,　and　generated　to　move　with　the　periodic　variation　of　the　force;　different　temperatures　did　not　change　the　shape　of　the　loss　of　polarization,　but　it　was　generated　at　the　position　of　the　wavelength　axis.　The　research　results　for　the　clear　fiber　Bragg　grating　lateral　force　has　significant　reference　value.　©,　2015,　Chinese　Society　of　Astronautics.　All　right　reserved.