McCallion K, Johnstone W, Fawcett G
Opt Lett. 1994 Apr 15;19(8):542-4. doi: 10.1364/ol.19.000542.
An in-line fiber-optic bandpass wavelength filter has been demonstrated based on a single-mode fiber, side polished into the core, in evanescent contact with a high-index multimode overlay waveguide. Passband linewidths down to 5.2 nm were observed, while spacing between transmission peaks was seen to range from 45 to 256 nm for variation of the overlay waveguide parameters. Additionally, rejection ratios of >20 dB and insertion losses as low as 0.5 dB were observed.
一种基于单模光纤的在线光纤带通波长滤波器已得到验证，该单模光纤侧面研磨至纤芯，与高折射率多模覆盖波导形成倏逝场接触。观察到通带线宽低至5.2 nm，而随着覆盖波导参数的变化，传输峰之间的间距在45至256 nm范围内。此外，观察到抑制比>20 dB，插入损耗低至0.5 dB。
