Theoretical investigation and optimization of fiber grating based slow light

OPTICS COMMUNICATIONS

卷:395

Article

Wang, Qi^1,2  Wang, Peng¹  Du, Chao^1,2  Li, Jin¹  Hu, Haifeng¹  Zhao, Yong¹ 

[1] Northeastern Univ, Coll Informat Sci & Engn, Shenyang 110819, Peoples R China

[2] Northeastern Univ, State Key Lab Synthet Automat Proc Ind, Shenyang 110819, Peoples R China

关键词: Fiber grating;    Slow light;    Loss coefficient;    Refractive index contrast;    Apodization;    Chirp;   

DOI  :  10.1016/j.optcom.2016.01.088

来源: Elsevier

【 摘 要 】

On the edge of bandgap in a fiber grating, narrow peaks of high transimittivity exist at frequencies where light interferes constructively in the forward direction. In the vicinity of these transmittivity peaks, light reflects back and forth numerous times across the periodic structure and experiences a large group delay. In order to generate the extremely slow light in fiber grating for applications, in this research, the common sense of formation mechanism of slow light in fiber grating was introduced. The means of producing and operating fiber grating was studied to support structural slow light with a group index that can be in principle as high as several thousand. The simulations proceeded by transfer matrix method in the paper were presented to elucidate how the fiber grating parameters effect group refractive index. The main parameters that need to be optimized include grating length, refractive index contrast, grating period, loss coefficient, chirp and apodization functions, those can influence fiber grating characteristics. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free