Cutoff modulator with tunable filtering characteristic based on the W type waveguide.
Utilizing the cutoff characteristic of zero-order TE mode of the W type waveguide, we propose a cutoff modulator with tunable filtering characteristic in this paper. Simulation results show that: for the modulator based on GaAlAs/GaAs epitaxial layers, its cutoff wavelength can be shifted from 1.62 mum to 1.42 mum when the refractive index of the core layer is decreased by -0.01 in the modulation region of 800 mum; and the extinction ration at the wavelength of 1.55 mum reaches 40 dB. Compared with other traditional cutoff modulators, it has the advantages of more compact size, simpler structure and the potential for high intensity integration.
Yu
Hui
H
Jiang
Xiaoqing
X
Qi
Wei
W
Yang
Jianyi
J
Wang
Minghua
M