光纖收發器AB端有區別嗎

光(guang)(guang)纖(xian)(xian)(xian)(xian)收(shou)發(fa)器(qi)按光(guang)(guang)纖(xian)(xian)(xian)(xian)芯數(shu)分類有(you)2種(zhong)，一(yi)種(zhong)是單(dan)(dan)(dan)模(mo)(mo)雙纖(xian)(xian)(xian)(xian)光(guang)(guang)纖(xian)(xian)(xian)(xian)收(shou)發(fa)器(qi)，一(yi)種(zhong)是單(dan)(dan)(dan)模(mo)(mo)單(dan)(dan)(dan)纖(xian)(xian)(xian)(xian)光(guang)(guang)纖(xian)(xian)(xian)(xian)收(shou)發(fa)器(qi)。我們講到的A，B端(duan)口只(zhi)有(you)單(dan)(dan)(dan)模(mo)(mo)單(dan)(dan)(dan)纖(xian)(xian)(xian)(xian)光(guang)(guang)纖(xian)(xian)(xian)(xian)收(shou)發(fa)器(qi)才(cai)會(hui)使用到，因為單(dan)(dan)(dan)模(mo)(mo)單(dan)(dan)(dan)纖(xian)(xian)(xian)(xian)收(shou)發(fa)器(qi)它(ta)是通(tong)過(guo)一(yi)芯光(guang)(guang)纖(xian)(xian)(xian)(xian)來(lai)(lai)傳輸，那(nei)么發(fa)射(she)和接收(shou)光(guang)(guang)都是同時通(tong)過(guo)一(yi)根光(guang)(guang)纖(xian)(xian)(xian)(xian)芯來(lai)(lai)傳輸。這樣的情況，要實現(xian)正常通(tong)訊(xun)就必須用到2種(zhong)波(bo)長的光(guang)(guang)來(lai)(lai)區分。

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單模單纖(xian)收(shou)(shou)發器的(de)光模塊發射(she)光波長有2個，一(yi)(yi)般(ban)短距離(li)(li)是1310nm/1550nm，遠距離(li)(li)是1490nm/1550nm。這樣一(yi)(yi)對收(shou)(shou)發器的(de)互連的(de)2端(duan)就會存在(zai)區別，一(yi)(yi)端(duan)收(shou)(shou)發器發射(she)1310nm接收(shou)(shou)1550nm。另一(yi)(yi)端(duan)則是發射(she)1550nm，接收(shou)(shou)1310nm。那(nei)么(me)方便用(yong)(yong)戶區分，一(yi)(yi)般(ban)就會用(yong)(yong)字(zi)母來代替(ti)，就出現(xian)了(le)A端(duan)（1310nm/1550nm），B端(duan)（1550nm/1310nm）。用(yong)(yong)戶使用(yong)(yong)必須(xu)AB配對使用(yong)(yong)，不(bu)可AA或者BB連接。

如何使用光纖收發器的AB端

光(guang)纖收(shou)(shou)(shou)發(fa)(fa)器的(de)(de)(de)(de)(de)(de)AB端(duan)(duan)通(tong)常(chang)是(shi)(shi)成對使(shi)用(yong)(yong)，A端(duan)(duan)用(yong)(yong)來發(fa)(fa)射，B端(duan)(duan)用(yong)(yong)來接(jie)收(shou)(shou)(shou)。人(ren)們根據連(lian)(lian)接(jie)光(guang)纖的(de)(de)(de)(de)(de)(de)芯數(shu)可分(fen)為(wei)單(dan)纖收(shou)(shou)(shou)發(fa)(fa)器與(yu)雙(shuang)(shuang)纖收(shou)(shou)(shou)發(fa)(fa)器，但在(zai)市(shi)面上使(shi)用(yong)(yong)單(dan)纖收(shou)(shou)(shou)發(fa)(fa)器的(de)(de)(de)(de)(de)(de)人(ren)較(jiao)多。單(dan)纖收(shou)(shou)(shou)發(fa)(fa)器兩(liang)(liang)端(duan)(duan)分(fen)別是(shi)(shi)A端(duan)(duan)與(yu)B端(duan)(duan)，這兩(liang)(liang)端(duan)(duan)的(de)(de)(de)(de)(de)(de)波(bo)(bo)(bo)(bo)長(chang)(chang)不同，發(fa)(fa)射端(duan)(duan)的(de)(de)(de)(de)(de)(de)波(bo)(bo)(bo)(bo)長(chang)(chang)比接(jie)收(shou)(shou)(shou)端(duan)(duan)的(de)(de)(de)(de)(de)(de)波(bo)(bo)(bo)(bo)長(chang)(chang)短，而(er)雙(shuang)(shuang)纖收(shou)(shou)(shou)發(fa)(fa)器其實(shi)是(shi)(shi)不分(fen)AB端(duan)(duan)的(de)(de)(de)(de)(de)(de)，因為(wei)它兩(liang)(liang)端(duan)(duan)的(de)(de)(de)(de)(de)(de)波(bo)(bo)(bo)(bo)長(chang)(chang)是(shi)(shi)一致的(de)(de)(de)(de)(de)(de)，只(zhi)是(shi)(shi)在(zai)連(lian)(lian)接(jie)時(shi)分(fen)TX（發(fa)(fa)射）端(duan)(duan)和RX（接(jie)收(shou)(shou)(shou)）端(duan)(duan)。單(dan)纖顧名思(si)義是(shi)(shi)一根光(guang)纖，也(ye)有行(xing)內(nei)(nei)人(ren)愛稱單(dan)芯收(shou)(shou)(shou)發(fa)(fa)器，是(shi)(shi)指(zhi)在(zai)一個光(guang)纖上進(jin)行(xing)兩(liang)(liang)端(duan)(duan)信號的(de)(de)(de)(de)(de)(de)收(shou)(shou)(shou)發(fa)(fa)，因為(wei)在(zai)單(dan)模單(dan)纖收(shou)(shou)(shou)發(fa)(fa)器的(de)(de)(de)(de)(de)(de)內(nei)(nei)部使(shi)用(yong)(yong)的(de)(de)(de)(de)(de)(de)光(guang)模塊(kuai)帶有兩(liang)(liang)個發(fa)(fa)射光(guang)波(bo)(bo)(bo)(bo)長(chang)(chang)，而(er)雙(shuang)(shuang)纖是(shi)(shi)通(tong)過兩(liang)(liang)根光(guang)纖交叉連(lian)(lian)接(jie)的(de)(de)(de)(de)(de)(de)，內(nei)(nei)部的(de)(de)(de)(de)(de)(de)光(guang)膜塊(kuai)只(zhi)有一個波(bo)(bo)(bo)(bo)長(chang)(chang)。