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Proposal of optically tunable and reconfigurable multi-channel bandstop filter using sum-frequency generation in a
Yuzhe Sun1, Zhefeng Hu1,2, Shuting Cheng1
1School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China.
Heliyon
|May 8, 2023
Abstract:
A multi-wavelength bandstop filter is proposed and numerically demonstrated using the sum-frequency generation (SFG) process in a waveguide of periodically poled lithium niobate (PPLN). This proposed device achieves channels number reconfigurable, central filtering wavelength of each filtering channel independently tunable and extinction ratios (ERs) equalized via all-optical methods.
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