| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductor laser which stabilizes emission beam shapes. <P>SOLUTION: A semiconductor laser has a Distributed Bragg Reflector (DBR) region 11 where diffraction gratings 10 are provided and a Fabry-Perot (FP) region 12 where no diffraction grating 10 is provided. An optical waveguide part 14 is disposed between the DBR region 11 and an emission end surface 13. The length of the optical waveguide part 14 is longer than or equal to the length of the DBR region 11 in the resonator length direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
