| 摘要 |
PURPOSE:To execute the conversion at a high speed, by providing an optical random access coupler for random-accessing an output of a light emitting element for executing the pulse light emission at a prescribed period, to plural waveguides, and a coupler for collecting its output light to one fiber. CONSTITUTION:An output 5 from a light emitting element 1 for executing the pulse light emission restrictively by some period is led to an optical random access coupler 2. Parallel electric signals a1-an to be transmitted are outputted from a transmitting signal generating part 3, the optical random access coupler 2 has optical output terminals b1-bn corresponding to said electric signals a1- an, and whether an output of light from each terminal b1-bn exists or not is decided by a level of the corresponding electric input signals a1-an. In this way, the optical outputs b1-bn from the optical random access coupler 2 are led to an optical fiber or a waveguide 6 corresponding to each output, and is coupled with a transmitting optical fiber or a waveguide 7 by a coupler 4. |
