Changcheng Xiang, Changhe Zhou. Dispersion Equation and Symmetry of Grating Modes[J]. Acta Optica Sinica, 2018, 38(9): 0905001
- Acta Optica Sinica
- Vol. 38, Issue 9, 0905001 (2018)
Fig. 1. Rectangular grating and attached coordinate system
Fig. 2. Four types of symmetric mode profiles with grating parameters of d=1965 nm, c=g=932.5 nm, nc=1.4496, ng=1 and λ=1310 nm. (a) (b) First two modes under incidence of the first order Bragg angle; (c) (d) first two modes under incidence of the second order Bragg angle
Fig. 3. Graphs of four functions under grating parameters of d=1979 nm, c=1385 nm, g=594 nm, nc=1.4496, ng=1 and λ=1064 nm. (a) f1(neff2); (b) f2(neff2); (c) f3(neff2); (d) f4(neff2)
Fig. 4. Effective refractive index of the first three modes obtained by two methods versus duty ratio under grating parameters of d=1500 nm, nc =1.4496, ng=1 and λ=1064 nm
|
Table 1. Computation time of effective index by two methodss
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20