| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductor light-emitting element and an optical pulse tester using the same that can emit light having a plurality of wavelength bands, especially that can oscillate light having a plurality of different wavelength bands in a plurality of longitudinal modes respectively, that is high output, and that can be manufactured with high yield. <P>SOLUTION: A first MQW (Multiple Quantum Well) active layer having an opening on a first light emission end surface, and having a first gain wavelength, a second MQW active layer having an opening on a second light emission end surface, and having a second gain wavelength, and a coupling waveguide layer coupling those optically, are coupled in a waveguide direction of light. An electrode above the coupling waveguide layer and a lower electrode are short-circuited. The first gain wavelength is longer than the second gain wavelength. A diffraction grating having a Bragg wavelength corresponding to the second gain wavelength is formed in the vicinity of the coupled waveguide layer. Light generated at the first MQW active layer is oscillated by a resonator consisting of the first light emission end surface and the second light emission end surface. Light generated at the second MQW active layer is oscillated by a resonator consisting of the diffraction grating and the second light emission end surface. Both are output from the second light emission end surface. <P>COPYRIGHT: (C)2012,JPO&INPIT |
