| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor laser element and semiconductor laser element array which can emit space transverse single-mode laser light having a relatively large intensity, and can emit laser light at a small emission angle and has a simple structure and a high efficiency. SOLUTION: The semiconductor laser element 3 comprises an n-type clad layer 13, an active layer 15, and a p-type clad layer 17. The p-type clad layer 17 has a ridge 9 for forming a refractive index-type waveguide 4 in the active layer 15. The refractive index-type waveguide 4 has a pair of side faces 4c and 4d. The pair of side faces 4c and 4d cross a predetermined axis direction A at an angleθbased on a complementary angleθc of a total reflection critical angle in the side faces 4c and 4d. An optical path of the laser light L which resonates in the refractive index-type waveguide 4 is limited to those totally reflected on the side faces 4c and 4d. Consequently, the laser light L becomes a space transverse single-mode laser light. Furthermore, since the width of the waveguide can be widened, the emission angle can be made small. COPYRIGHT: (C)2006,JPO&NCIPI
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