Description
差分延遲線DDL
當(dāng)兩個(gè)正交偏振態(tài)信號(hào)以不同的速度通過一個(gè)系統(tǒng)時(shí)將產(chǎn)生偏振模式色散(PMD),限制高速網(wǎng)絡(luò)的最大信號(hào)傳輸率。差分偏振延遲線(DDL)的工作原理是將輸入信號(hào)分割成兩個(gè)偏振態(tài),動(dòng)態(tài)地改變兩個(gè)偏振態(tài)之間的相對(duì)延遲,然后再將它們重新組合成新的偏振態(tài)輸出光纖。正交偏振態(tài)之間的相位延遲是通過線性位移臺(tái)進(jìn)行精確控制,控制精度可達(dá)3 fs的分辨率。正交偏振態(tài)之間的最大延遲量可達(dá)±50 ps,是高速網(wǎng)絡(luò)系統(tǒng)研究開發(fā)的理想選擇。
Important Notice
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