MANUFACTURE OF SEMICONDUCTOR LASER AND OPTICAL FIBER COUPLING MODULE

摘要

PURPOSE:To set a lens at the position where the highest coupling efficiency is obtained and to reduce deterioration and variance in the coupling efficiency by detecting the focusing point depending upon the optical axis of a semiconductor laser and the lens and monitoring the optical axis shift between the semiconductor laser and lens. CONSTITUTION:A semiconductor laser holder 11 is held by a chuck, etc., an optical semiconductor position detecting element 14 whose relative position with the semiconductor laser 2 is fixed is installed having its surface perpendicularly to the optical axis, and the semiconductor laser 2 is driven to process a signal from the optical semiconductor position detecting element 14 by an optical axis detecting circuit 15, thereby detecting which position on the surface of the optical semiconductor detecting element 14 the optical axis of the semiconductor laser 2 is present. Then, a lens holder 16 where the lens 5 is fixed is slid on the semiconductor laser holder 11 at right angles to the optical axis to detect the focusing position by the optical semiconductor position detecting element 14 and an optical axis detecting circuit 15. Then, the optical semiconductor position detecting element 14 is detached and an optical fiber 10 is fixed to a ferrule 8 with an adhesive, ground slantingly at 8 deg., and inserted into a ferrule holder 7, and its position is adjusted.