| 摘要 |
PROBLEM TO BE SOLVED: To integrate the compensation of fiber for decreasing the dispersion of color by providing a transmitter, receiver and transmission line composed of fiber spans with amplification successively connected to alternately change the codes of diffusion. SOLUTION: A single channel dispersion averaged compensation type system is provided with a laser 1, modulator 2, amplifier 3, initial fiber span 4 and amplifier 5. The span 4 is included inside a transmitter 6 together with the amplifiers 3 and 5. In the case of dispersion compensation type fiber compensation, a receiver 7 is provided with a final half span 8 between amplifiers 9 and 10. A detector 11 is intended to express a converter from optic to electric together with required additional devices. Five intermediate fiber spans 12-16 consist of the transmission line together with amplifiers 7-20. Then, the capacity of underground optical fiber communication system upgraded in the important arrangement and length of fiber for dispersion compensation is made maximum. |
