Development of Reliable and Efficient Coupling of 1.3 Micrometer Single-Mode Lasers to Single-Mode Fibers

摘要

Optical, thermal, and mechanical analysis and experiments have been performed to ascertain that a reliable and efficient package can be made. It was determined that movement of fiber as small as one-tenth of a micrometer can change the coupling efficiency. Maximum light coupling can be obtained with a fiber end diameter which is the same as the fiber core diameter which is about 9 micrometer. Thermal expansion characteristics of a thermoelectric cooler, brass, Kover, fiber, and fiber jackets were studied. The strength and stability of fibers, different epoxies, and solders as well as their adhesion properties were also studied. The design of a dual-in-line (DIP) laser package is presented which takes into account thermal compensation in order to minimize component strain and changes under different environmental conditions.