| Summary: | 碩士 === 國立臺北科技大學 === 電腦通訊與控制研究所 === 92 === Abstract
This paper altogether divides into two parts. Simulates one aims at eight channels, speed with 10Gbit/s, the encoding method is non-return to zero in single span. The positive dispersion fibers are single mode fiber(SMF), non-zero dispersion shift fiber(NZDSF) and large effect area fiber(LEAF). The negative dispersion fibers are reverse dispersion fiber(RDF-20,RDF-40 and RDF-60). Alternately matches by this six kind of optical fibers altogether has nine kind of analogue results (SMF+RDF-20, SMF+RDF-40,SMF+RDF-60, NZDSF+RDF-20, NZDSF+RDF-40, NZDSF+RDF-60, LEAF+RDF-20, LEAF+RDF-40 and LEAF+RDF-60). Simulates two is multi-spans, also added a attenuator back the amplifier. We suppose it for the variable, the scope from -1~-5dB. Adds the attenuator is for discuss the system the performance to be best under what kind of weaken situation. The way to compensate in simulates two is according to simulates one analogue result(The positive dispersion and negative dispersion fiber its Q value presents the raised distribution, the negative dispersion and positive dispersion fiber its Q value presents the concave distribution).The compensation will divide into positive dispersion and negative dispersion fiber, negative dispersion and positive dispersion fiber just as well as the negative-positive-positive-negative dispersion fiber.
We may discover by the analogue result, when the positive dispersion fiber value bigger, channel one to channel eight Q value disparity smaller. When the way of compensation becomes 0:1, also is the negative dispersion in front matches positive dispersion in the after Q value has the concave situation, simultaneously to this compensation(0:1) when the transmittance fiber is LEAF or NZDSF various channels Q value is worse.
The long distance also the high speed DWDM system already was the future tendency, but the chromatic dispersion produces the question is we must pay attention. This paper provided each different chromatic dispersion compensation as well as the influence of attenuate regarding the system performance , expected these data will be useful for scholarly research or engineer put the optical cable.
|
|---|
