Abstract
In this work, we designed and simulated a novel air-core As <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ring fiber that supports orbital angular momentum (OAM) modes. By optimizing the structure parameters of the designed fiber to effectively tailor its chromatic dispersion, a near-zero flat dispersion profile with a total of <; ±30 ps/nm/km variation over 3380-nm bandwidth from 2025 nm to 5405 nm is achieved for OAM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1,1</sub> mode. After launching a 100-fs 70-kW hyperbolic secant pulse into an 8-mm air-core As <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ring fiber, a light-carrying OAM supercontinuum is numerically formed beyond two-octave range, covering 5717nm bandwidth from 1182 nm to 6897 nm at -30dB. Furthermore, the generated supercontinuum is highly coherent across the whole spectral range. This can serve as an effective manner to expand the spectral coverage of the OAM beams for various applications.
Highlights
Orbital angular momentum (OAM) has gained much attention due to its special doughnut-shaped intensity distribution, as well as the theoretically infinite topological states
After launching a 100-fs 70-kW pulse train centered at 3400 nm into the 8-mm long designed air-core As2S3 ring fiber, a >2.5 octave supercontinuum spectrum carrying the OAM1,1 mode is generated with the wavelength from 1182 nm to 6897 nm at -30 dB of power level
In summary, 8-mm designed air-core As2S3 ring fiber is used for OAM supercontinuum generation with a 100-fs 70-kW secant hyperbolic pump pulse
Summary
Orbital angular momentum (OAM) has gained much attention due to its special doughnut-shaped intensity distribution, as well as the theoretically infinite topological states. After launching a 100-fs 70-kW pulse train centered at 3400 nm into the 8-mm long designed air-core As2S3 ring fiber, a >2.5 octave supercontinuum spectrum carrying the OAM1,1 mode is generated with the wavelength from 1182 nm to 6897 nm at -30 dB of power level. These results are validated through the numerical solution of the generalized nonlinear Schrodinger equation
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
