Polarization-Independent Electro-Optical Modulator Based on Thin-Film Lithium Niobate(Invited)
A polarization-independent electro-optical modulator based on thin-film lithium niobate(TFLN)is proposed;it is based on a polarization-independent beam splitter and a mode converter.The polarization-independent beam splitter achieves precise beam splitting of TE0 and TM0 modes,whereas the mode converter efficiently converts the input TM0 mode to TE1 mode.Accordingly,the traveling-wave electrode structure loaded with periodic capacitors achieves efficient electro-optical modulation of two light modes.The simulation results show that the electro-optical bandwidth of the modulator is greater than 100 GHz.This helps solve the instability problem caused by polarization sensitivity in existing electro-optical modulators and opens up new research lines for TFLN-based modulators.
thin film lithium niobateelectro-optic modulatorpolarization beam splittermode conversion
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