Chinese Journal of Lasers B, 2002, 11 (2): 117, 网络出版: 2006-08-08
A Novel Fabrication for Method Long Period Fiber Grating
A Novel Fabrication for Method Long Period Fiber Grating
摘要
Abstract
A new method of fabricating all-fiber broadband-rejection filter based on long period fiber grating (LPFG) is proposed. The principle in the method is to make periodic asymmetrical deformation in the core of fiber without microbends by electrode discharging so as to induce periodic refractive index changes. Two kinds of filters whose rejection peak wavelength at 1550 nm and 1310 nm are obtained. The insertion loss is less than 0. 6 dB and 1. 4 dB respectively. The 20 dB bandwidth ranges from 10 nm to 39 nm. The backward reflection loss is extremely small (less than -70 dB). Such devices can be used as isolation filters in 1310/1550 nm WDM system and other fields.
HE Shuo, LI Xinwan, YE Ailun, HE Wanxun, SONG Hao. A Novel Fabrication for Method Long Period Fiber Grating[J]. Chinese Journal of Lasers B, 2002, 11(2): 117. HE Shuo, LI Xinwan, YE Ailun, HE Wanxun, SONG Hao. A Novel Fabrication for Method Long Period Fiber Grating[J]. 中国激光(英文版), 2002, 11(2): 117.