Uncooled mini-DIL module for 980-nm pump lasers

The importance of lower cost while maintaining high performance of erbium-doped fiber amplifiers (EDFAs) is growing with increased bandwidth demand. The uncooled 980-nm miniature dual-inline (Mini-DIL) pump laser is attractive for compact EDFA designs because it offers the advantages of lower cost, smaller footprint, minimal heat generation, and reduced electrical power consumption. In this paper, we report a low-cost uncooled Mini-DIL module designed for 980-nm pump lasers. A three-dimensional finite element analysis model effectively predicts module thermal and stress performance. Experimental results of module power and coupling efficiency stability over assembly processes are presented. A minimum optical output power of 150 mW is achieved in a group of 10 devices across a temperature range of 0°C to 70°C at a drive current of 350 mA with a 1.5-mm raised ridge InGaAs/AlGaAs single quantum well laser chip.