Being the warping sensor where the warping sensor

摘要

PROBLEM TO BE SOLVED: To provide a bend sensor with which the increase in the optical loss is suppressed and the sensitivity is increased.;SOLUTION: The bend sensor is formed with a light leakage part which generates loss variation by the bend to be applied to an optical fiber on the outer peripheral surface of the optical fiber and the bend sensor where the light leakage part forms the shape of holes each of which does not have an excessive length part which does not contribute to the loss variation by the bend to be applied to the optical fiber. Moreover, a manufacturing method of the bend sensor is characterized in that the bend sensor is obtained, by forming the light leakage part forming the shape of holes each of which does not have the excessive length part which does not contribute to the loss variations by the bend to be applied to the optical fiber, while converging laser beams and irradiating the outer peripheral surface of the optical fiber with the converged laser beams.;COPYRIGHT: (C)2007,JPO&INPIT