| 摘要 |
PURPOSE:To simplify an oscillating wavelength, and to reduce oscillating threshold currents by forming structure, in which a plurality of light-emitting layers are supoerposed and shaped through insulating layers and each light-emitting layer is conducted independently and oscillated, in a surface light-emitting laser. CONSTITUTION:A first laser is is constituted by an n-InP layer 2 as a buffer layer, an InGaAsP layer 3 as a first active layer, a p-InP layer 4, and a p- InGaAsP layer 5 as a contact layer. Light is emitted by double hetero-junctions constituted while holding the first active layer 3 consisting of InGaAsP by the n-InP layer 2 and the p-InP layer 4. A high-resistance InP layer 6 as an insulating layer insulates a second layer from the first laser. The second laser is constituted by an n-InP layer 7, and InGaAsP layer 8 as a second active layer, a p-InP layer 9 and a p-InGaAsP layer as a contact layer. Light is emitted by double hetero-junctions constituted while holding the second active layer 8 composed of InGaAsP by the n-InP layer 7 and the p-InP layer 9. |
