光电工程
光電工程
광전공정
Opto-Electronic Engineering
2015年
9期
77-81,88
,共6页
下变频%光载无线电%三阶交调失真%偏振调制器%Sagnac环
下變頻%光載無線電%三階交調失真%偏振調製器%Sagnac環
하변빈%광재무선전%삼계교조실진%편진조제기%Sagnac배
downconvert%radio-over-fiber (ROF)%third-order intermodulation distortion (IMD3)%polarization modulator (PolM)%Sagnac loop
为了抑制下变频光载无线(Radio-Over-Fiber, ROF)链路中的三阶交调失真,提出一种基于偏振调制器(Polarization Modulator, PolM)-Sagnac环结构的线性下变频光载无线链路.理论阐述了这种结构的调制方式和工作原理,对基于该结构的下变频光载无线链路性能进行了仿真分析.结果表明,通过最优化三个偏振控制器(Polarization Controller, PC)的参数以及偏振器(Polarizer)与PBS主轴的角度,这种技术可以达到最佳链路增益,同时系统的无杂散寄生动态范围(Spurious Free Dynamic Range, SFDR)达到127.4 dB?Hz2/3.
為瞭抑製下變頻光載無線(Radio-Over-Fiber, ROF)鏈路中的三階交調失真,提齣一種基于偏振調製器(Polarization Modulator, PolM)-Sagnac環結構的線性下變頻光載無線鏈路.理論闡述瞭這種結構的調製方式和工作原理,對基于該結構的下變頻光載無線鏈路性能進行瞭倣真分析.結果錶明,通過最優化三箇偏振控製器(Polarization Controller, PC)的參數以及偏振器(Polarizer)與PBS主軸的角度,這種技術可以達到最佳鏈路增益,同時繫統的無雜散寄生動態範圍(Spurious Free Dynamic Range, SFDR)達到127.4 dB?Hz2/3.
위료억제하변빈광재무선(Radio-Over-Fiber, ROF)련로중적삼계교조실진,제출일충기우편진조제기(Polarization Modulator, PolM)-Sagnac배결구적선성하변빈광재무선련로.이론천술료저충결구적조제방식화공작원리,대기우해결구적하변빈광재무선련로성능진행료방진분석.결과표명,통과최우화삼개편진공제기(Polarization Controller, PC)적삼수이급편진기(Polarizer)여PBS주축적각도,저충기술가이체도최가련로증익,동시계통적무잡산기생동태범위(Spurious Free Dynamic Range, SFDR)체도127.4 dB?Hz2/3.
In order to suppress the third-order intermodulation distortion of the down converting Radio-over-fiber (ROF) link, linearized down converting ROF link based on a Polarization Modulator (PolM) in a Sagnac loop is proposed. First, the modulation method and the principle of this technique are described theoretically. And then, simulation analysis about ROF link based on the technology is carried out. The analysis results show that the technology can get optimized link gain, and spurious free dynamic range reach 127.4 dB?Hz2/3 by optimizing the parameters of the three Polarization Controllers (PCs) and the polarization angle between the polarizer and the spindle of PBS.
