光纖收發器AB端有區別嗎
光(guang)(guang)(guang)纖收(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)按光(guang)(guang)(guang)纖芯(xin)(xin)數分類有2種(zhong)(zhong)(zhong),一(yi)種(zhong)(zhong)(zhong)是(shi)單模(mo)雙纖光(guang)(guang)(guang)纖收(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi),一(yi)種(zhong)(zhong)(zhong)是(shi)單模(mo)單纖光(guang)(guang)(guang)纖收(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)。我們講到(dao)的(de)A,B端口只(zhi)有單模(mo)單纖光(guang)(guang)(guang)纖收(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)才(cai)會使(shi)用(yong)(yong)到(dao),因為單模(mo)單纖收(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)它(ta)是(shi)通(tong)過一(yi)芯(xin)(xin)光(guang)(guang)(guang)纖來傳輸,那(nei)么發(fa)(fa)(fa)(fa)射和接收(shou)(shou)光(guang)(guang)(guang)都是(shi)同時通(tong)過一(yi)根光(guang)(guang)(guang)纖芯(xin)(xin)來傳輸。這樣的(de)情(qing)況,要(yao)實現正常通(tong)訊就(jiu)必須用(yong)(yong)到(dao)2種(zhong)(zhong)(zhong)波長的(de)光(guang)(guang)(guang)來區分。
單(dan)模單(dan)纖收(shou)發(fa)器的光模塊(kuai)發(fa)射光波長有2個,一(yi)(yi)般短(duan)距離(li)是1310nm/1550nm,遠(yuan)距離(li)是1490nm/1550nm。這樣(yang)一(yi)(yi)對收(shou)發(fa)器的互連的2端(duan)(duan)就(jiu)(jiu)會存在區(qu)別,一(yi)(yi)端(duan)(duan)收(shou)發(fa)器發(fa)射1310nm接收(shou)1550nm。另一(yi)(yi)端(duan)(duan)則是發(fa)射1550nm,接收(shou)1310nm。那么方(fang)便用(yong)(yong)戶(hu)區(qu)分(fen),一(yi)(yi)般就(jiu)(jiu)會用(yong)(yong)字母來代替,就(jiu)(jiu)出現了A端(duan)(duan)(1310nm/1550nm),B端(duan)(duan)(1550nm/1310nm)。用(yong)(yong)戶(hu)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)(guang)纖(xian)(xian)收(shou)(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)的(de)(de)(de)(de)(de)AB端(duan)(duan)(duan)(duan)通常(chang)是(shi)成對使用(yong),A端(duan)(duan)(duan)(duan)用(yong)來發(fa)(fa)(fa)(fa)射(she)(she),B端(duan)(duan)(duan)(duan)用(yong)來接收(shou)(shou)(shou)。人(ren)們(men)根據連(lian)接光(guang)(guang)纖(xian)(xian)的(de)(de)(de)(de)(de)芯(xin)數可分為單(dan)纖(xian)(xian)收(shou)(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)與雙纖(xian)(xian)收(shou)(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi),但在(zai)市面上(shang)使用(yong)單(dan)纖(xian)(xian)收(shou)(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)的(de)(de)(de)(de)(de)人(ren)較(jiao)多。單(dan)纖(xian)(xian)收(shou)(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)兩(liang)端(duan)(duan)(duan)(duan)分別(bie)是(shi)A端(duan)(duan)(duan)(duan)與B端(duan)(duan)(duan)(duan),這兩(liang)端(duan)(duan)(duan)(duan)的(de)(de)(de)(de)(de)波(bo)(bo)長(chang)(chang)不(bu)同,發(fa)(fa)(fa)(fa)射(she)(she)端(duan)(duan)(duan)(duan)的(de)(de)(de)(de)(de)波(bo)(bo)長(chang)(chang)比(bi)接收(shou)(shou)(shou)端(duan)(duan)(duan)(duan)的(de)(de)(de)(de)(de)波(bo)(bo)長(chang)(chang)短,而雙纖(xian)(xian)收(shou)(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)其實是(shi)不(bu)分AB端(duan)(duan)(duan)(duan)的(de)(de)(de)(de)(de),因為它兩(liang)端(duan)(duan)(duan)(duan)的(de)(de)(de)(de)(de)波(bo)(bo)長(chang)(chang)是(shi)一致(zhi)的(de)(de)(de)(de)(de),只(zhi)(zhi)是(shi)在(zai)連(lian)接時分TX(發(fa)(fa)(fa)(fa)射(she)(she))端(duan)(duan)(duan)(duan)和RX(接收(shou)(shou)(shou))端(duan)(duan)(duan)(duan)。單(dan)纖(xian)(xian)顧名思義(yi)是(shi)一根光(guang)(guang)纖(xian)(xian),也有行內(nei)人(ren)愛稱單(dan)芯(xin)收(shou)(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi),是(shi)指在(zai)一個(ge)(ge)光(guang)(guang)纖(xian)(xian)上(shang)進行兩(liang)端(duan)(duan)(duan)(duan)信(xin)號的(de)(de)(de)(de)(de)收(shou)(shou)(shou)發(fa)(fa)(fa)(fa),因為在(zai)單(dan)模(mo)單(dan)纖(xian)(xian)收(shou)(shou)(shou)發(fa)(fa)(fa)(fa)器(qi)(qi)的(de)(de)(de)(de)(de)內(nei)部使用(yong)的(de)(de)(de)(de)(de)光(guang)(guang)模(mo)塊(kuai)帶有兩(liang)個(ge)(ge)發(fa)(fa)(fa)(fa)射(she)(she)光(guang)(guang)波(bo)(bo)長(chang)(chang),而雙纖(xian)(xian)是(shi)通過兩(liang)根光(guang)(guang)纖(xian)(xian)交叉(cha)連(lian)接的(de)(de)(de)(de)(de),內(nei)部的(de)(de)(de)(de)(de)光(guang)(guang)膜(mo)塊(kuai)只(zhi)(zhi)有一個(ge)(ge)波(bo)(bo)長(chang)(chang)。
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