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• W4365457911 startingPage "129508" @default.
• W4365457911 abstract "Mode-division multiplexing (MDM) technology, an effective approach to boost the transmission capacity, has seen momentous progress in the past decade. Wideband, low-noise, and power-efficient optical amplifiers for the MDM systems are highly desired. We propose and theoretically demonstrate a broadband few-mode optical parametric amplifier (OPA) using a multimode thin-film periodically poled lithium niobate (PPLN) waveguide with multiple quasi-phase matching (QPM). The few-mode OPA relies on intramodal and intermodal difference-frequency generation (DFG) processes, obtaining strong parametric amplification of MDM signals using a single-frequency fundamental-mode pump. Differential modal gain (DMG) is optimized by adjusting the effective length of parametric interaction for each mode. In addition, parasitic DFG processes to cause nonlinear modal crosstalk is suppressed due to the large phase mismatch ensured by the multiple QPM design. The results show that amplification of signals carrying three modes with >11.2-dB gain per mode over 41 nm bandwidth covering extended C band can be achieved with a 600-mW pump, while the DMG is less than 1.1 dB and nonlinear modal crosstalk is negligible." @default.
• W4365457911 created "2023-04-15" @default.
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• W4365457911 date "2023-08-01" @default.
• W4365457911 modified "2023-10-15" @default.
• W4365457911 title "Few-mode optical parametric amplification in a multiple quasi-phase-matched thin-film lithium niobate waveguide" @default.
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• W4365457911 doi "https://doi.org/10.1016/j.optcom.2023.129508" @default.
• W4365457911 hasPublicationYear "2023" @default.
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