微结构光纤光栅的制作及应用(英文)

Fabrications and applications of fiber gratings based on microstructured optical fibers

研究实芯光子晶体光纤和空气芯光子带隙光纤光栅的制作方法及应用.在实芯光子晶体光纤中写入长周期光纤光栅,并用其研制高灵敏度应变传感器.通过聚焦CO2激光在光子晶体光纤表面刻槽的方法研制光纤型起偏器.利用CO2激光周期性塌陷空气孔的方法,在空气芯光子带隙光纤中写入新颖的长周期光纤光栅.利用准分子激光或飞秒激光通过双光束干涉原理在细芯掺锗光子晶体光纤或细芯纯硅光子晶体光纤中写入光纤布拉格光栅.

Microstructured optical fibers are usually divided into two different types of fibers： solid-core photonic crystal fibers （PCFs） and air-core photonic bandgaps fibers （PBGs）. We present the fabrication methods and appli-cations of optical fiber gratings written in these two types of microstructured optical fibers. A stain sensor with a high sensitivity was demonstrated by using long period fiber gratings （LPFGs） written in solid-core PCFs. An in-fiber po-larizer based on a LPFG was fabricated by means of a focused CO2 laser beam to notch periodically a PCF. A novel LPFG was written in an air-core PBF by use of a CO2 laser to collapse periodically air holes in the fiber cladding. Mo-reover, this paper reports fiber Bragg gratings written in small-core Ge-doped or pure-solid photonic crystal fibers by means of a two-beam interference technique employing an exeimer or femtosecond laser.