Patent ID: 9184565
Filing Date: 2015-11-10
Classification: B82Y,H01S

Abstract:
1. A semiconductor light-emitting element comprising: a first cladding layer in a first conductive type; a quantum well active layer; and a second cladding layer in a second conductive type, wherein: the first cladding layer, the quantum well active layer and the second cladding layer which are stacked on a semiconductor substrate in this order, a ridge-shaped stripe formed at the second cladding layer forms a waveguide, Rf<Rr and Wf>Wr are satisfied, where a width of the ridge-shaped stripe at a front end face from which laser light is output is represented by Wf, a width of the ridge-shaped stripe at a rear end face opposite to the front end face is represented by Wr, a reflectance of the front end face is represented by Rf, and a reflectance of the rear end face is represented by Rr, a width W of a current injection region at the front end face is less than the width Wf of the ridge-shaped stripe at the front end face, and when (i) an average width Wave of the ridge-shaped stripe is within a range longer than 6 μm and equal to or shorter than 12 μm, (ii) a resonator length is within a range of equal to or longer than 550 μm and equal to or shorter than 1000 μm, and (iii) ΔW is calculated by (Wf−W), ΔW is set at equal to or greater than ((Wave/3−1)−1) μm and equal to or less than ((Wave/3−1)+1) μm.