Abstract

Previously we have reported a twin-mesa GaAs-(AlGa)As laser integrated with a passive waveguide, which can be osclllated in a single longitudinal and fundamental transverse mode due to the action of optical injection looking of the frequency.¹ However, its threshold current is relatively high. To decrease the threshold current, an integrated twin- planar-stripe GaAs-(AlGa)As laser coupled with a passive waveguide has been devised. Figure 1 shows a schematic diagram of the integrated laser, which contains two active cavity devices A and B coupled with a passive waveguide of 100-μm length. The active device stripes are 10μm wide, 300 μm long, and 0.1μm thick. A reversed p-n junction was adopted for the current confinement.

© 1984 Optical Society of America