High-power quantum-well InGaAsP/InP lasers and their coupling with the optical fibers

Summary form only given. An investigation of high-power broad-stripe lasers and the possibility of their effective coupling with multimode optical fiber was carried out. Laser wafers were grown by a modified LPE (liquid-phase-epitaxy) growth technique utilizing short-term active layer deposition on a moving substrate. Optical fibers with central core diameters of 50, 100, and 200 μm and NALFA of 0.2 were used for coupling. The maximum values of coupled power for these three fibers were 0.3, 0.39, and 0.44 W for a 1-A driving current through a 60-μm micrometer-stripe diode. In the case of a 100-μm-strip diode with 2-A driving current, coupled powers of about 0.7 and 0.9 W were obtained for fibers with 100- and 200-μm core diameters, respectively