The generation of radially and azimuthally polarized beams is theoretically investigated in thin-disk laser configurations by writing Jones matrices for optical elements. Higher modes are omitted by aperture and the mode-selection operation is done by discontinuous phase elements. Two modes, TEM and TEM, are combined to generate the radially and azimuthally polarized laser beam. The polarization of the output beams is studied by the extended Jones matrices. In addition, the output power of the thin-disk laser is numerically estimated by solving the rate equations in ytterbium-doped materials.
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http://dx.doi.org/10.1364/AO.55.003510 | DOI Listing |
J Opt Soc Am A Opt Image Sci Vis
September 2024
By combining the improved properties of the Bessel modulated autofocusing beam [Phys. Rev. A104, 043524 (2021)PLRAAN1050-294710.
View Article and Find Full Text PDFWe propose and demonstrate an ultra-wide tunable mode-locked all-fiber laser based on nonlinear amplifying loop mirror (NALM) with the output of cylindrical vector beams (CVBs). The tuning range covers from 1029 nm to 1098 nm through the intracavity nonlinear polarization evolution (NPE) filter effect. The switchable CVBs between radially and azimuthally polarized beams with mode purity above 90% are generated by incorporating a broadband few-mode long-period fiber grating (LPFG).
View Article and Find Full Text PDFTaking into account phase-polarization interactions is crucial for the formation of spatially structured laser beams. The effects that arise in this context can lead to the modulation of individual field components and the transformation of the overall light field. In this study, we investigate the impact of phase and polarization distributions with radial dependencies in polar coordinates on the longitudinal component of laser beams passing through a transmissive spatial light modulator (SLM) based on twisted nematic liquid crystals.
View Article and Find Full Text PDFACS Photonics
December 2024
Graduate School and Faculty of Information Science and Electrical Engineering, Kyushu University, 744 Motooka Nishi-ku, Fukuoka, 819-0395, Japan.
Whispering-gallery mode (WGM) resonators, renowned for their high Q-factors and narrow line widths, are widely utilized in integrated photonics. Integrating diffraction gratings onto WGM cavities has gained significant attention because these gratings function as azimuthal refractive index modulators, enabling single-mode WGM emissions and supporting beams with orbital angular momentum (OAM). The introduction of curved grating structures facilitates guided mode resonances by coupling high-order diffracted waves with leaking modes from the waveguide.
View Article and Find Full Text PDFJ Colloid Interface Sci
March 2025
Department of Mechanical Engineering, Baylor University, One Bear Place #97356, Waco, 76798, TX, United States. Electronic address:
This study reveals how drops impacting thin liquid films leave behind radial microbubble trains - here defined as large-area microbubbles (LAMs) - over a region comparable to the maximal surface coverage of the spreading phase. Using a thin, minimally compliant viscous oil film, the trapped bubbles are immobilized and quantified via high-speed imaging techniques across varying drop velocities and surface inclinations. The setup enables the characterization of microbubble entrainment (e.
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