APPARATUS AND METHOD FOR RESIDUAL STRESS MEASURING OF OPTICAL FIBER

摘要

An apparatus and a method for measuring residual stress of an optical fiber are provided to reduce time for measuring the residual stress which determines the variation in refractive index and optical loss in the optical fiber. An apparatus for measuring residual stress of an optical fiber includes light emitting parts(10), first light adjustment parts(20), polarization adjustment parts(30), an interference part, second light adjustment parts(50), and light detection parts(60). The light emitting parts are implemented using HeNe laser. The first light adjustment parts convert light emitted from the light emitting parts into parallel light. The polarization adjustment parts adjust the parallel light to light having polarization perpendicular to an optical fiber shaft. The second light adjustment parts convert the light passed through the interference part into parallel light. The light detection parts show the interference pattern of the light passed through the interference part.