Magnetic control photonic crystal filter based on Bi-doped composite rare earth iron garnet
A photonic crystal and iron garnet technology is applied in the field of magnetron photonic crystal filters based on Bi-doped composite rare earth iron garnet, which can solve the problems of insufficient response speed, less use of optical communication bands, and less use of filter devices, etc. Achieve the effect of improved performance parameters, strong adaptability, and flexible use
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[0023] Example 1:
[0024] After the communication wave signal in a certain frequency range enters the filter from the left input port 5, only when the resonance frequency falls at the resonance frequency of the circular ring cavity, most of the electromagnetic waves input into the linear waveguide will be coupled Into the output linear waveguide, and then output through the output port 6 of the output linear waveguide; when the frequency of the electromagnetic wave in the input linear waveguide is different from the resonant frequency of the circular ring cavity, the electromagnetic wave in the input linear waveguide cannot pass through the photonic crystal ring The resonant cavity can not be output from the output port 6 of the output linear waveguide. When the magnetic field intensity in the Z direction is 0.638T, the refractive index of the magnetic medium inside the ring resonator is 3.92, and the resonant wavelength of the resonant cavity is 1530nm. The other wavelengths th...
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