摘要
以组合波导理论为基础，分析了１４８０／１５５０ｎｍ波分复用器的耦合区横截面形状和尺寸与偏振灵敏度的关系。着重比较了矩形截面和椭圆形截面二种波分复用器的偏振性能，并发现当椭圆截面的短轴与长轴之比为１：１．８８时，器件性能几乎与偏振无关。研制成功的１４８０／１５５０ｎｍ波分复用器的波长隔离度大于２０ｄＢ．偏振灵敏度小于０．１ｄＢ．附加损耗小于０．５ｄＢ。
In this paper, bated on the theory of composited waveguides, the relations between the shape of the crabs-secton of coupling region and polarization sensitivity in wavelength division-multiplexers (WDMs) are analyzed. Then we highlightly compared polarization characteristics of the rectangular cross-section of WDM with those of the elliptical cross-section of WDM, and found that when the ratio of the principal axis to minor axis of ellipse equals 1. 88 the WDMs are insensitive to polarization. The fabricated WDM operating at wavelengths 1480/ 1550 nm exhibits an isolation above 20 dB, polarization sensitivity of less than 0.1 dB, and excess loss of less than 0. 5 dB.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1995年第8期627-631,共5页
Chinese Journal of Lasers
关键词
波分复用器
优化设计
掺杂
铒
光纤放大器
泵浦
optical fiber, wavelength-division multiplexer, polarization sensitivity
