采用一種新的時鐘增強(qiáng)方案并配合雙區(qū)折射率耦合激光器實現(xiàn)非歸零碼信號的全光時鐘恢復(fù)，通過數(shù)學(xué)仿真研究了此時鐘恢復(fù)系統(tǒng)在64 Gb/s非歸零碼系統(tǒng)中的性能表現(xiàn)。仿真結(jié)果表明，受益于時鐘增強(qiáng)模塊的高速特性，該系統(tǒng)完成高速非歸零碼信號時鐘的全光恢復(fù)能達(dá)到較好的效果。
關(guān) 鍵 詞 時鐘恢復(fù); 時鐘增強(qiáng); 非線性光纖; 雙區(qū)折射率耦合激光器; 非歸零碼

Abstract A scheme for all-optical clock recovery from non-return-to-zero(NRZ) coded data by combining a novel clock enhancement component with a two section distributed feed back(DFB) laser has been proposed, and its’ function and performances under 64 Gb/s NRZ data streams have been demonstrated and investigated by numerical simulation. It is shown that this system can achieve clock recovery from high-speed NRZ data with a satisfying performance.
Key words clock recovery; clock enhancement; nonlinear fiber; two section distributed feed back laser; nonreturn-to-zero data