光纖收發器AB端有區別嗎

光(guang)(guang)纖(xian)(xian)收(shou)發器(qi)按光(guang)(guang)纖(xian)(xian)芯數分類有2種，一種是單(dan)(dan)(dan)模雙纖(xian)(xian)光(guang)(guang)纖(xian)(xian)收(shou)發器(qi)，一種是單(dan)(dan)(dan)模單(dan)(dan)(dan)纖(xian)(xian)光(guang)(guang)纖(xian)(xian)收(shou)發器(qi)。我們講到(dao)的(de)A，B端口(kou)只(zhi)有單(dan)(dan)(dan)模單(dan)(dan)(dan)纖(xian)(xian)光(guang)(guang)纖(xian)(xian)收(shou)發器(qi)才會使用到(dao)，因為單(dan)(dan)(dan)模單(dan)(dan)(dan)纖(xian)(xian)收(shou)發器(qi)它是通過一芯光(guang)(guang)纖(xian)(xian)來傳輸，那么發射和接(jie)收(shou)光(guang)(guang)都是同時通過一根(gen)光(guang)(guang)纖(xian)(xian)芯來傳輸。這樣的(de)情況，要實現正常通訊就必須用到(dao)2種波長的(de)光(guang)(guang)來區分。

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單(dan)(dan)模單(dan)(dan)纖收(shou)發器(qi)的(de)光(guang)(guang)模塊發射(she)(she)光(guang)(guang)波(bo)長有2個，一(yi)般(ban)短距(ju)離(li)是1310nm/1550nm，遠距(ju)離(li)是1490nm/1550nm。這樣一(yi)對收(shou)發器(qi)的(de)互連的(de)2端(duan)就(jiu)會存在區別，一(yi)端(duan)收(shou)發器(qi)發射(she)(she)1310nm接收(shou)1550nm。另一(yi)端(duan)則是發射(she)(she)1550nm，接收(shou)1310nm。那么方便用(yong)(yong)(yong)戶區分(fen)，一(yi)般(ban)就(jiu)會用(yong)(yong)(yong)字母來代替，就(jiu)出現了A端(duan)（1310nm/1550nm），B端(duan)（1550nm/1310nm）。用(yong)(yong)(yong)戶使用(yong)(yong)(yong)必須AB配對使用(yong)(yong)(yong)，不可AA或(huo)者BB連接。

如何使用光纖收發器的AB端

光(guang)(guang)(guang)(guang)纖(xian)收(shou)發器(qi)的(de)(de)AB端(duan)(duan)通(tong)常是成對(dui)使(shi)用(yong)，A端(duan)(duan)用(yong)來(lai)發射，B端(duan)(duan)用(yong)來(lai)接(jie)(jie)(jie)收(shou)。人(ren)(ren)們根(gen)(gen)據連接(jie)(jie)(jie)光(guang)(guang)(guang)(guang)纖(xian)的(de)(de)芯數可分(fen)為(wei)單(dan)纖(xian)收(shou)發器(qi)與雙纖(xian)收(shou)發器(qi)，但在市面上使(shi)用(yong)單(dan)纖(xian)收(shou)發器(qi)的(de)(de)人(ren)(ren)較多(duo)。單(dan)纖(xian)收(shou)發器(qi)兩(liang)端(duan)(duan)分(fen)別是A端(duan)(duan)與B端(duan)(duan)，這(zhe)兩(liang)端(duan)(duan)的(de)(de)波(bo)(bo)(bo)(bo)長不同(tong)，發射端(duan)(duan)的(de)(de)波(bo)(bo)(bo)(bo)長比接(jie)(jie)(jie)收(shou)端(duan)(duan)的(de)(de)波(bo)(bo)(bo)(bo)長短，而雙纖(xian)收(shou)發器(qi)其實是不分(fen)AB端(duan)(duan)的(de)(de)，因為(wei)它兩(liang)端(duan)(duan)的(de)(de)波(bo)(bo)(bo)(bo)長是一(yi)致的(de)(de)，只(zhi)是在連接(jie)(jie)(jie)時(shi)分(fen)TX（發射）端(duan)(duan)和RX（接(jie)(jie)(jie)收(shou)）端(duan)(duan)。單(dan)纖(xian)顧(gu)名思義是一(yi)根(gen)(gen)光(guang)(guang)(guang)(guang)纖(xian)，也(ye)有(you)行(xing)(xing)內人(ren)(ren)愛(ai)稱單(dan)芯收(shou)發器(qi)，是指在一(yi)個(ge)光(guang)(guang)(guang)(guang)纖(xian)上進行(xing)(xing)兩(liang)端(duan)(duan)信號的(de)(de)收(shou)發，因為(wei)在單(dan)模單(dan)纖(xian)收(shou)發器(qi)的(de)(de)內部(bu)使(shi)用(yong)的(de)(de)光(guang)(guang)(guang)(guang)模塊帶(dai)有(you)兩(liang)個(ge)發射光(guang)(guang)(guang)(guang)波(bo)(bo)(bo)(bo)長，而雙纖(xian)是通(tong)過兩(liang)根(gen)(gen)光(guang)(guang)(guang)(guang)纖(xian)交叉連接(jie)(jie)(jie)的(de)(de)，內部(bu)的(de)(de)光(guang)(guang)(guang)(guang)膜塊只(zhi)有(you)一(yi)個(ge)波(bo)(bo)(bo)(bo)長。