| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor laser diode capable of preventing COD deterioration on a rear-end surface.SOLUTION: A laser diode (LD) 10 includes: a substrate 31 composed of a semiconductor material; and an active layer 33, and a lower cladding layer 32 and an upper cladding layer 34 stacked so as to interpose the active layer 33 therebetween in its inside. In the LD10, a resonator is formed by a front-end surface 11a and a rear-end surface 11b. In the LD10, a plurality of stripes (a stripe 20a, a stripe 20b, and a stripe 20c) are formed in parallel with the resonator direction. Each width of the stripes 20a, 20b, and 20c gradually narrows from the front-end surface 11a toward the rear-end surface 11b. |
