Qian Yi

TL;DR: The experimental results highlight the prospects of Bi thin film as broadband pulsed modulators, and may open new avenues toward advanced Bi-based broadband photonic devices.

TL;DR: In this paper, the authors report that bulk-like transition metal pentatellurides ZrTe5 and HfTe5 exhibit excellent nonlinear optical properties with the increase of the intensity of the incident light, and can act as robust saturable absorbers for generating femtosecond fiber lasers.

TL;DR: In this paper, the stable dissipative solitons can be generated from the Yb-doped fiber laser with the interaction of mechanically exfoliated NbSe2 and the evanescent field of the D-shaped fiber.

Abstract: We report a vectorial fiber laser with controlled transverse mode conversion by intra-cavity polarization manipulation. By combining a q-plate and two quarter-wave plates (QWPs), we can generate a switchable polarization state output represented by the higher-order Poincaré sphere (l = +1, l = −1), and distinguish the fourfold degenerate LP11 mode. The four transverse vector modes can be obtained and switched in a flexible way, and the slope efficiency of the fiber laser can reach up to 39.4%. This compactness, high efficiency, and switchable operation potential will benefit a range of applications, such as materials processing, particle manipulation, etc.