| 摘要 |
PURPOSE:To control the polarization of laser beams emitted from nearly the same region in a single element. CONSTITUTION:In the element with a single semiconductor substrate 1, a clad layer 2. a quantum well layer 3, and a current-injection means for injecting current to the quantum well layer, a first well layer 5 where a quantum well layer radiates TE mode and a second quantum well layer 6 for radiating TM mode are included. the light in TE mode and that in TM mode controlled by current injected by the current injection means is emitted from nearly the same region. |
