波分復(fu)用的技(ji)術原理(li)（二(er)）

WDM技術就是(shi)為(wei)了充分利用(yong)(yong)(yong)(yong)(yong)單模光(guang)(guang)(guang)纖(xian)低(di)(di)損(sun)耗區帶(dai)來的(de)(de)(de)(de)巨大(da)帶(dai)寬資源(yuan)，根據(ju)每(mei)一(yi)信(xin)(xin)(xin)道(dao)光(guang)(guang)(guang)波(bo)(bo)(bo)(bo)(bo)的(de)(de)(de)(de)頻率（或波(bo)(bo)(bo)(bo)(bo)長(chang)）不(bu)(bu)(bu)同(tong)(tong)可以將(jiang)(jiang)(jiang)(jiang)光(guang)(guang)(guang)纖(xian)的(de)(de)(de)(de)低(di)(di)損(sun)耗窗口劃(hua)分成若干個信(xin)(xin)(xin)道(dao)，把光(guang)(guang)(guang)波(bo)(bo)(bo)(bo)(bo)作(zuo)為(wei)信(xin)(xin)(xin)號(hao)的(de)(de)(de)(de)載波(bo)(bo)(bo)(bo)(bo)，在(zai)(zai)(zai)發(fa)送端(duan)采用(yong)(yong)(yong)(yong)(yong)波(bo)(bo)(bo)(bo)(bo)分復(fu)用(yong)(yong)(yong)(yong)(yong)器（合波(bo)(bo)(bo)(bo)(bo)器）將(jiang)(jiang)(jiang)(jiang)不(bu)(bu)(bu)同(tong)(tong)規定波(bo)(bo)(bo)(bo)(bo)長(chang)的(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)光(guang)(guang)(guang)載波(bo)(bo)(bo)(bo)(bo)合并起來送入一(yi)根光(guang)(guang)(guang)纖(xian)進行傳(chuan)輸(shu)。在(zai)(zai)(zai)接收(shou)端(duan)，再由一(yi)波(bo)(bo)(bo)(bo)(bo)分復(fu)用(yong)(yong)(yong)(yong)(yong)器（分波(bo)(bo)(bo)(bo)(bo)器）將(jiang)(jiang)(jiang)(jiang)這(zhe)些不(bu)(bu)(bu)同(tong)(tong)波(bo)(bo)(bo)(bo)(bo)長(chang)承載不(bu)(bu)(bu)同(tong)(tong)信(xin)(xin)(xin)號(hao)的(de)(de)(de)(de)光(guang)(guang)(guang)載波(bo)(bo)(bo)(bo)(bo)分開的(de)(de)(de)(de)復(fu)用(yong)(yong)(yong)(yong)(yong)方(fang)式。由于不(bu)(bu)(bu)同(tong)(tong)波(bo)(bo)(bo)(bo)(bo)長(chang)的(de)(de)(de)(de)光(guang)(guang)(guang)載波(bo)(bo)(bo)(bo)(bo)信(xin)(xin)(xin)號(hao)可以看作(zuo)互相獨(du)立（不(bu)(bu)(bu)考慮光(guang)(guang)(guang)纖(xian)非線(xian)性(xing)時），從而在(zai)(zai)(zai)一(yi)根光(guang)(guang)(guang)纖(xian)中可實(shi)現多路光(guang)(guang)(guang)信(xin)(xin)(xin)號(hao)的(de)(de)(de)(de)復(fu)用(yong)(yong)(yong)(yong)(yong)傳(chuan)輸(shu)。將(jiang)(jiang)(jiang)(jiang)兩個方(fang)向的(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)分別(bie)安排在(zai)(zai)(zai)不(bu)(bu)(bu)同(tong)(tong)波(bo)(bo)(bo)(bo)(bo)長(chang)傳(chuan)輸(shu)即可實(shi)現雙向傳(chuan)輸(shu)。根據(ju)波(bo)(bo)(bo)(bo)(bo)分復(fu)用(yong)(yong)(yong)(yong)(yong)器的(de)(de)(de)(de)不(bu)(bu)(bu)同(tong)(tong)，可以復(fu)用(yong)(yong)(yong)(yong)(yong)的(de)(de)(de)(de)波(bo)(bo)(bo)(bo)(bo)長(chang)數也(ye)不(bu)(bu)(bu)同(tong)(tong)，波(bo)(bo)(bo)(bo)(bo)分復(fu)用(yong)(yong)(yong)(yong)(yong)器報價，從2個至(zhi)幾十個不(bu)(bu)(bu)等(deng)，一(yi)般商用(yong)(yong)(yong)(yong)(yong)化是(shi)8波(bo)(bo)(bo)(bo)(bo)長(chang)和16波(bo)(bo)(bo)(bo)(bo)長(chang)系統，波(bo)(bo)(bo)(bo)(bo)分復(fu)用(yong)(yong)(yong)(yong)(yong)器，這(zhe)取決于所允許(xu)的(de)(de)(de)(de)光(guang)(guang)(guang)載波(bo)(bo)(bo)(bo)(bo)波(bo)(bo)(bo)(bo)(bo)長(chang)的(de)(de)(de)(de)間(jian)隔大(da)小。波(bo)(bo)(bo)(bo)(bo)分復(fu)用(yong)(yong)(yong)(yong)(yong)器

粗波分復用器的用途

是大容(rong)量(liang)、密集/稀疏(shu)波(bo)分結(jie)合、可管理的波(bo)分復(fu)用(yong)器。能夠在光傳輸過(guo)程中對信號進行再(zai)生放大、濾波(bo)變形(xing)、時(shi)鐘再(zai)定時(shi)。它(ta)能解決光纖(xian)資源(yuan)緊張和(he)光纖(xian)距離過(guo)大的問題，有(you)效節省光纖(xian)資源(yuan)和(he)組網成本。CWDM3000廣(guang)泛運用(yong)于各種干線的長途傳輸、城域網、金融行業(ye)同城容(rong)災、企業(ye)快速擴容(rong)、廣(guang)電(dian)網等。波(bo)分復(fu)用(yong)器

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波分復用器的優勢

對已建光(guang)纖系(xi)統(tong)，波分(fen)復用器廠家，尤其早期鋪(pu)設(she)的芯數不(bu)多的光(guang)纜，只(zhi)要原(yuan)系(xi)統(tong)有功率余量，可進一步增容，實(shi)現多個單向(xiang)(xiang)信號或雙向(xiang)(xiang)信號的傳送而不(bu)用對原(yuan)系(xi)統(tong)作大改動，具有較強(qiang)的靈活性。

由于大量(liang)減少(shao)了(le)光纖(xian)的使用量(liang)，大大降低了(le)建(jian)設成本、由于光纖(xian)數量(liang)少(shao)，波分復用器優勢，當出(chu)現故障時，恢復起來(lai)也迅速方便。波分復用器

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