Fuse connection method null of drift wave optical

摘要

PURPOSE:To improve the centering accuracy of optical fibers by controlling the rotation of motors for rotary mechanisms so that the quenching ratio of polarization mode beams transmitted through both the optical fibers whose axes are matched with each other are maximized or minimized at the projection ends of the beams. CONSTITUTION:The optical fibers are set up on right and left rotary mechanisms and blocks 24, 20, pressed with fiber clamps 22 and sheaths 26 and then pressed with rotary clamps by turning cams. While observing the end faces of the optical fibers 12 through a microscope 90, a dial 48 for the right rotary mechanism is rotated and roughly adjusted by manual operation so that the positions of stress applying parts 18 are made symmetrical or rectangular with/to each other. Then, automatic adjustment is executed in the X and Y directions and the automatic adjustment of a thetadirection is executed by the right rotary mechanism. Namely when the planes of polarization of both the optical fibers are completely coincide with each other or most deviated, the absolute value of the quenching ratio of monitor beams at the projection ends is maximized or minimized and optical power is also changed in accordance with the state of said absolute value, so that the optical power is fed back to a motor 72 to execute automatic adjustment.