CAJ | 학술논문

在光载无线( ROF)系统中，光纤的色散会导致系统中传输的信号产生畸变，更为严重的是会引起系统输出射频信号的幅度随光纤传输的距离发生周期性的起伏变化，从而严重限制系统的性能。基于非线性啁啾光栅( NLCFBG)的可调色散补偿方法，为克服光载无线系统中光纤色散的影响提供了一个简便、灵活的方案。首先采用计算机仿真对该方案在光载无线系统中进行色散补偿的应用作了全面的分析，然后研究了光栅的群时延抖动对色散补偿性能的影响。研究结果表明，基于非线性啁啾光栅的色散补偿方案能对光载无线系统中双边带调制的射频信号传输进行有效的可调色散补偿，但光栅的群时延抖动会对传输的信号造成一定损伤，需要在光栅的设计、制作过程中进行优化。
재광재무선( ROF)계통중，광섬적색산회도치계통중전수적신호산생기변，경위엄중적시회인기계통수출사빈신호적폭도수광섬전수적거리발생주기성적기복변화，종이엄중한제계통적성능。기우비선성조추광책( NLCFBG)적가조색산보상방법，위극복광재무선계통중광섬색산적영향제공료일개간편、령활적방안。수선채용계산궤방진대해방안재광재무선계통중진행색산보상적응용작료전면적분석，연후연구료광책적군시연두동대색산보상성능적영향。연구결과표명，기우비선성조추광책적색산보상방안능대광재무선계통중쌍변대조제적사빈신호전수진행유효적가조색산보상，단광책적군시연두동회대전수적신호조성일정손상，수요재광책적설계、제작과정중진행우화。
In a radio over fiber ( ROF) system, fiber dispersion causes signal distortion and periodical fluctuation of the output signal amplitude in the system, which greatly limits the system performance. The tunable dispersion compensation method based on nonlinear chirped fiber Bragg gratings ( NLCFBG) can tackle this problem in a con-venient and flexible manner. In this paper, the performance of this method was firstly verified, and then the impact of group delay ripple was thoroughly analyzed through computer simulation. The results show that the NLCFBG based dispersion compensation method can reduce the transmission dispersion of double sideband modulation radio frequency(RF) signals in radio over fiber(ROF) system, while the group delay ripple of a NLCFBG can induce signal impairment, which need to be considered in the optimized design and fabrication of the NLCFBG.