Add/drop channel filter based on fiber-Bragg-grating-assisted coupler fabricated by asymmetric fused taper technology

作者：Dong Xiao Wei^*; Pei Li; Jian Shui Sheng

来源：Acta Physica Sinica, 2006, 55(9): 4739-4743.

• fiber bragg grating (FBG)
• fiber coupler
• add/drop channel filter
• pre-drawing fused taper

All-fiber add/drop filter based on fiber-Bragg-grating (FBG) assisted coupler is compact and non-interferometric, which reduces the device's sensitivity to the grating position. By introducing the grating refractive modulation into the evanescent field coupling, the coupled-mode equation of FBG-assisted coupler is obtained and the influences of fiber mismatch on the filter spectra is investigated thoroughly. And a high-quality FBG-assisted filter is achieved by adjusting fiber structure parameters using asymmetric fused taper technology. The experimentally measured results are in good agreement with the numerical calculations.

• 出版日期2006-9
• 单位北京交通大学