CAJ | 학술논문

为了解决单个均匀光纤光栅Sagnac环信道隔离度差的缺点,提出了级联Sagnac环组成梳状滤波器的方案.采用Jones矩阵理论分别对单个光纤光栅Sagnac环和二阶、三阶级联时的频谱特性进行了理论分析和数值仿真.对于三阶Sagnac环级联时的情形,实现了通道间隔为0.8 nm、FWHM为0.1 nm的梳状滤波器,在相同信道间隔下使得FWHM降低为单个光纤光栅Sagnac环的1/4,从而有效提高了系统信道隔离度.得到了具有均匀通带间隔、信道隔离度高、光谱半高宽度FWHM窄等特性的梳状滤波器,使其性能能够更好地满足WDM的使用要求.
위료해결단개균균광섬광책Sagnac배신도격리도차적결점,제출료급련Sagnac배조성소상려파기적방안.채용Jones구진이론분별대단개광섬광책Sagnac배화이계、삼계급련시적빈보특성진행료이론분석화수치방진.대우삼계Sagnac배급련시적정형,실현료통도간격위0.8 nm、FWHM위0.1 nm적소상려파기,재상동신도간격하사득FWHM강저위단개광섬광책Sagnac배적1/4,종이유효제고료계통신도격리도.득도료구유균균통대간격、신도격리도고、광보반고관도FWHM착등특성적소상려파기,사기성능능구경호지만족WDM적사용요구.
In order to overcome the deficiency of single uniform fiber grating Sagnac loop, which has poor channel isolation, the comb filter with a cascade of Sagnac loop was proposed. Also, the frequency spectrum characteristic of the single uniform fiber grating Sagnac loop, two and three order Sagnac loop were analyzed with Jones matrix theory. For the case of three order Sagnac loop, a comb filter which has 0.8 mm spacing and 0.1 nm FWHM was got. Furtermore, in the same channel spacing, this comb filter's FWHM was only 1/4 that of the single uniform fiber grating Sagnac loop's. The results show that the system channel isolation degree is improved effectively, and a comb filter which has uniform passband interval, high channel isolation, narrow FWHM characteristics was proposed, this kinds of filter can meet the WDM requirement better.