Patent ID: 9323015
Filing Date: 2016-04-26
CPC Classification: G02B,Y10T

Claim Text:
1. A method of manufacturing an optical assembly that includes an optical device including a semiconductor laser diode, a J-sleeve including an optical isolator, and a sleeve member each arranged along an optical axis, the method comprising steps of: holding the optical device on an apparatus for assembling the optical assembly; holding the J-sleeve through the sleeve member such that the J-sleeve covers the optical device as being rotatable round the optical axis and the sleeve member is capable of sliding on an end surface of the J-sleeve finding, at a first alignment step, a relative position between the sleeve member and the J-sleeve at which the optical device and the sleeve member show a maximum optical coupling efficiency therebetween; aligning the sleeve member optically with the J-sleeve in the plane around the position found by the first alignment such that the J-sleeve keeps a rotational angle around the optical axis; and aligning the J-sleeve optically with the optical device along the optical axis, wherein the step of finding the relative position includes a step to rotate the sleeve member around the optical axis on the end surface of the J-sleeve as tracing closed loops concentric to each other and alternating a direction of the rotation in a clockwise direction and a counter clockwise direction in respective closed loops, and wherein the number of rotations in the clockwise direction equals the number of rotations in the counter clockwise direction.