| 摘要 |
PURPOSE:To obtain an ultrashort optical pulse by giving optical pulse output of a laser to the first nonlinear Fabry-Perot optical bistable device, giving this transmitted light to the second nonlinear Fabry-Perot optical bistable device, and forming a separator for extracting the reflected light. CONSTITUTION:A GaAs-GaAlAs distribution feedback type semiconductor laser 12 is laminated on a substrate 11. An output pulse from the laser 12 is made incident through a GaAlAs buffer layer 13 to the first optical bistable device 14. The device 14 is prepared by inserting a GaAs-GaAlAs superlattice nonlinear medium 143 between GaAs-A As Bragg reflectors 141, 142. A blazed Bragg connector 15 acts as a 3dB beam splitter. The transmitted light from the connector 15 is made incident to the second optical bistable device 16 constituted like the device 14. The reflected light from the device 16 is separated with the connector 15, and extracted as an ultrashort output optical pulse. Accordingly, an ultrashort pulse can be generated with a small device by small power. |
