2013/12/16 by Sourangsu Banerji, Banerji, Sourangsu · 1 citation
Engineering · Physics and Astronomy · #Band gap #Bragg's law #Coupled mode theory #Coupling (piping) #Diffraction #Distributed Bragg reflector #FOS: Physical sciences #Fiber Bragg grating #General Physics (physics.gen-ph) #Grating #Materials science #Optics #Optics (physics.optics) #Optoelectronics #Photonic Crystal and Fiber Optics #Photonic Crystals and Applications #Photonic and Optical Devices #Photonic crystal #Physics #Reflection (computer programming) #Refractive index #Waveguide #Wavelength #physics.gen-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.1312.4442
published in arXiv (Cornell University) (Cornell University) · 11 pages, 8 figures. arXiv admin note: substantial text overlap with arXiv:1312.4762
openalex publication_date 2013/12/16 · arxiv created 2014/05/28 · arxiv updated 2014/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
In this paper, forward and backward propagating waves and reflectivity in an optical waveguide structure namely the fiber Bragg reflector also considered as a one dimensional photonic crystal, are analytically computed using coupled mode theory for different grating lengths and coupling conditions. AlxGa1-xN/GaN material composition is considered as unit block of the periodic organization, and refractive index of AlxGa1-xN is taken to be dependent on material composition, bandgap and operating wavelength following Adachis' model. The structure being considered is the Bragg grating where increase in grating length enhances the reflection of electromagnetic wave, and strong coupling provides larger bandgap spectral width. Input wavelength is made different from Bragg wavelength to study the characteristics of propagating waves. A suitable combination of grating length and coupling coefficient is helpful in designing the photonic bandgap at 1550 nm wavelength. These characteristic curves can be utilized to study how waves propagate through the optical waveguides which have a special place in optical communications