| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that it is difficult to achieve reduction of cost and power consumption without degrading original performance using a conventional semiconductor light emitting device due to its low light output at a constant actuating current and due to restriction in ridge width when it is integrated with an optical element such as a Mach-Zehnder optical modulator. SOLUTION: In the semiconductor light emitting device having a ridge, ridge width is widened while keeping single transverse mode by setting a low refractive index difference between the ridge and other components. In this device, generation of diffusion current and increase in refractive index difference are prevented by forming substantially vertical grooves along both sides of the ridge, and degradation of performance due to regrowth is prevented by forming a diffraction grating on the ridge. When it is integrated with an optical element such as a Mach-Zehnder optical modulator, the semiconductor light emitting device is integrated with the optical element by using a tapered waveguide without increasing the number of growth cycles with no restriction of the ridge with. COPYRIGHT: (C)2011,JPO&INPIT |
