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Abstract
All-optical wavelength conversion technology based on two-dimensional (2D) materials has lately received keen interest. As a new 2D material, borophene displays acceptable photoelectric properties. We demonstrate the all-optical wavelength conversion through four-wave mixing (FWM) in borophene-microfiber hybrid waveguides. Borophene is deposited at the thinnest part of the tapered fiber and enhanced FWM occurs in this photonic device. By optimizing the effect of nonlinear polarization, wavelength tuning, and power variation, the conversion efficiency increases to ${-}{19.1}\;{\rm{dB}}$, corresponding to 3 dB conversion bandwidth in a range of 7.1 nm. In addition, this photonic device is employed to achieve all-optical wavelength conversion of 10 Gb/s non-return-to-zero digital sequence. The signal quality of converted light such as optical signal-to-noise ratio, bit-error-rate, and eye diagram are investigated, which indicates that the proposed wavelength converter has high conversion efficiency and remarkable stability. This study shows that the borophene-microfiber waveguide has potential application prospects in all-optical signal processing.
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