Femtosecond laser(3+1)D printed few-mode fiber mode equalizer

【摘要】 We propose and demonstrate an all-fiber few-mode mode equalizer(ME) fabricated via a novel, to our knowledge, femtosecond laser(3 + 1)D printing technique that employs multi-material two-photon polymerization for integrated waveguide fabrication for the first time. The waveguide structure for mode power equalization was directly integrated onto the fiber tip.By precisely tuning both the waveguide length and refractive index(RI) profile, a tunable differential mode attenuation(DMA)range from-2.4 to 9.2 d B was achieved, significantly surpassing the performance of previously reported all-fiber MEs. This approach provides a compact and highly tunable solution for mode equalization in few-mode fiber transmission systems.更多还原

【Abstract】 We propose and demonstrate an all-fiber few-mode mode equalizer(ME) fabricated via a novel, to our knowledge, femtosecond laser(3 + 1)D printing technique that employs multi-material two-photon polymerization for integrated waveguide fabrication for the first time. The waveguide structure for mode power equalization was directly integrated onto the fiber tip.By precisely tuning both the waveguide length and refractive index(RI) profile, a tunable differential mode attenuation(DMA)range from-2.4 to 9.2 d B was achieved, significantly surpassing the performance of previously reported all-fiber MEs. This approach provides a compact and highly tunable solution for mode equalization in few-mode fiber transmission systems.更多还原