| 摘要 |
<p>PURPOSE:To independently detect individual optical outputs with a low crosstalk, and to obtain a semiconductor laser which obtains stable output light by propagating light emitted from a plurality of light emitting points in different waveguides, and detecting them by different photodetectors formed in the waveguides. CONSTITUTION:A semiconductor laser 1 having a plurality of light emitting points 1a, 1b, 1c is fusion-bonded on a heat sink 3, and a board 2 having a groove is provided immediately after the edge face of the laser 1. A waveguide 5 is formed of a tunnel-like part formed of the protrusion of the board 2 and the sink 3. A photodetector 4 is fusion-bonded with a photodiode on the sink in the waveguide 5. In this case, the edge face of the laser 1 and the incident edge face of the board 2 are approached to suppress the diffraction of the light from other light emitting point. Thus, individual light outputs can be detected independently with low crosstalk.</p> |
