| 摘要 |
PURPOSE:To reproduce a presence/absence signal as to the reflection of light from a pulse laser oscillation device by arraying fine refractive index discontinuous parts where reflected waveguide light is generated in an optical waveguide according to information to the recorded and guiding the light from a pulse laser oscillation device. CONSTITUTION:Laser light pulses are converted by a microlens 41 on the end surface of the waveguide and guided to one channel optical waveguide. The width and intervals of respective channel type optical waveguides are set typically to about 1mum. When a response of 0.5 picosecond is considered on the whole system, refractive index discontinuous parts are at intervals of 50mum and recording of 1Mbit/cm<2> is enabled; when the length of the optical waveguide is 5cm, one light pulse is inputted to read information of 1,000 bit in an extremely short time of 0.7ns. The information recorded in one optical waveguide is read out and then a substrate where many optical waveguides are arrayed or the laser oscillator and an optical detector are moved to read recording information of a next channel out. |
