| 摘要 |
<p>An optical amplifier (10) comprising a substrate (18) of a semiconductor material having a pair of opposed surfaces (20 and 22) and a body of semiconductor material (24) on one of the surfaces. The body includes a pair of clad layers (26 and 28) of opposite conductivity types having an intermediate quantum well region (30) therebetween. The clad layers (26 and 28) and quantum well region (30) form a wave guide (24) which extends along the body. A gain section (12) is in the body along the waveguide (24). The gain section (12) is adapted to generate light in the active region when a voltage is applied thereacross. The light input section (14) is adapted to direct light into the body and along the waveguide (24). A light output section (16) having a grating (42) extending across the body is at the other end of the gain section (12). The periods of the gratings (42) are such that no self-oscillation of the light in the waveguide occurs.</p> |
