基于FP-LD注入的无本振光载波全光混频技术

A Local Oscillator-Free Frequency Mixing Based on FP-LD Injection

提出了一种基于低速信号注入法布里-珀罗型激光二极管(FP-LD)的无本振全光混频技术,利用FP-LD的一个纵模和外部注入信号光的四波混频作用生成的边带锁定纵模产生光载射频信号。通过改变FP-LD的注入光信号强度和偏振态实现副载波频率可变,并根据FP-LD注入锁定特性分析实验结果得到的不同边模抑制比。实验中采用2.7,2.5,1.25 Gb/s非归零(NRZ)码注入FP-LD实现副载波频率分别为16.2,10.0,18.2和20.0 GHz的全光混频,测量16.2 GHz的副载波得到了10 kHz偏移处单边带相位噪声为-81.2,-87.7 dBc/Hz。

a novel local oscillator（LO）-free frequency mixing based on FP-LD injection is proposed.The sideband of four wave mixing（FWM） between external injection light and one longitudinal mode of FP-LD generates sideband locking longitudinal mode which then produces the radio-frequency（RF） signal.By adjusting the intensity and polarization of injection signal,different mixing frequency is obtained and the different side-mode suppression ratio is analyzed theoretically.Subcarrier of 16.2,10.0,18.2 and 20.0 GHz is obtained from 2.7,2.5 and 1.25 Gb/s NRZ signal injection into FP-LD respectively,in which the single sideband phase noise of-81.2 and-87.7 dBc/Hz at 10 kHz frequency deviation of 16.2 GHz is measured.