Title :
Analysis of the Influence of External Refractive Index on Long-Period Fiber Grating Coupler
Author :
Peng, Shuihai ; Zhou, Xiaojun ; Chen, Chengjin ; Liu, Dong ; Liu, Yong
Author_Institution :
Sch. of Optoelectron. Inf., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China
Abstract :
The influence of external refractive index on long-period fiber grating coupler consisting of two parallel long-period fiber gratings is analyzed by coupled-mode theory considering three-layer geometry of the fiber. The self-scattering of guided mode and the shift of resonant wavelength caused by the core index modulation are taken into account for precise simulation. The variation of coupling coefficients, resonant wavelength, transmissivity and coupling efficiency are discussed respectively. Finally, the experiments are implemented with different external indexes which prove the validity of our model.
Keywords :
coupled mode analysis; diffraction gratings; light transmission; optical fibre couplers; optical fibre dispersion; refractive index; resonance; core index modulation; coupled mode theory; coupling coefficient; coupling efficiency; external refractive index; guided mode; long period fiber grating coupler; resonant wavelength shift; self scattering; three layer geometry; transmissivity efficiency; Fiber gratings; Geometry; Information analysis; Optical fiber communication; Optical fiber couplers; Optical fiber devices; Optical fiber polarization; Optical fiber theory; Refractive index; Resonance;
Conference_Titel :
Photonics and Optoelectronic (SOPO), 2010 Symposium on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4963-7
Electronic_ISBN :
978-1-4244-4964-4
DOI :
10.1109/SOPO.2010.5504374
