| 摘要 |
PROBLEM TO BE SOLVED: To provide a wavelength multiplex transmission method at a low cost by using a surface light emitting element whose device cost is low. SOLUTION: A device is comprised of a surface emission element 1 which emits light of wide spectrum width in each of light emitting parts 2A, 2B, 2C, a plurality of optical fibers 3A, 3B, 3C with different wavelength transmitting regions, a photocoupler 4 which transmits light transmitted through the plurality of optical fibers by photocoupling and transmission optical fiber 5. Lights emitted by the surface emission element 1 of different wavelength regions alone are transmitted by a plurality of optical fibers 3A, 3B, 3C and the lights are coupled and subjected to wavelength multiplex transmission. Therefore, it is not necessary to provide a surface emission element itself with light emission function of different wavelength regions. Furthermore, it is possible to constitute a monolithic surface emission element, to manufacture it readily and to provide wavelength multiplex transmission which enables information processing of a large volume at a low cost. |
