TY - JOUR
T1 - Long period grating in/on planar and channel waveguides
T2 - A theory description
AU - Zhang, De Long
AU - Zhang, Yun
AU - Cui, Yu Ming
AU - Chen, Cai He
AU - Pun, E. Y.B.
PY - 2007/9
Y1 - 2007/9
N2 - A comprehensive, complete theory suitable for a long period grating (LPG) on/in a planar or channel waveguide is described on the basis of coupled mode theory. The theory aims at key characteristic parameters with respect to the effect of the LPG, including resonance wavelength, transmission power of the guided mode in the waveguide, full-width at half-maximum (FWHM) of the power attenuation band in transmission spectrum of the guided mode, and coupling coefficient between a guided and a coupled mode. The type of the grating including relief and index modulation, different polarization state combinations of the guided mode and the resonant mode, and slanted grating structure are considered in this theory. The influences of the coupling between two guided modes and between a guided mode and a substrate mode are discussed. The role of cladding layer in a long period waveguide grating is demonstrated in particular. Finally, the expressions for the sensitivity of resonance wavelength as a function of external temperature, pressure and surrounding refractive index are derived.
AB - A comprehensive, complete theory suitable for a long period grating (LPG) on/in a planar or channel waveguide is described on the basis of coupled mode theory. The theory aims at key characteristic parameters with respect to the effect of the LPG, including resonance wavelength, transmission power of the guided mode in the waveguide, full-width at half-maximum (FWHM) of the power attenuation band in transmission spectrum of the guided mode, and coupling coefficient between a guided and a coupled mode. The type of the grating including relief and index modulation, different polarization state combinations of the guided mode and the resonant mode, and slanted grating structure are considered in this theory. The influences of the coupling between two guided modes and between a guided mode and a substrate mode are discussed. The role of cladding layer in a long period waveguide grating is demonstrated in particular. Finally, the expressions for the sensitivity of resonance wavelength as a function of external temperature, pressure and surrounding refractive index are derived.
KW - Long period grating (LPG)
KW - Mode coupling
KW - Planar/channel waveguide
UR - https://www.scopus.com/pages/publications/33847380657
U2 - 10.1016/j.optlastec.2006.08.003
DO - 10.1016/j.optlastec.2006.08.003
M3 - 文章
AN - SCOPUS:33847380657
SN - 0030-3992
VL - 39
SP - 1204
EP - 1213
JO - Optics and Laser Technology
JF - Optics and Laser Technology
IS - 6
ER -