摘要光纤激光器被广泛应用于工业加工, 军事国防等领域, 其输出的激光能量分布往往呈类高斯
型分布, 这种光斑直径内的非均匀能量分布在应用于光刻, 焊接等方面时往往会影响光斑内沿 …

We report a novel method of beam shaping in an all-fiber laser. Flattop beams are first
generated from the all-fiber laser using a few-mode fiber Bragg grating by superposing the …

In this article, we propose a novel beam-and-probabilistic shaping technique based on
orbital angular momentum (OAM) modes for indoor optical wireless communications (OWC) …

Physical insights and characteristics of beam transformations based on multimode
interference (MMI) in multimode waveguides are illuminated and analyzed. Our calculations …

In this work, we investigate the effect of illumination parameters which is light polarization,
wavelength, and beam focalization, on the large-scale patterning of the surface of …

In this paper, we report a novel indoor optical wireless communications system employing
orbital angular momentum (OAM) mode-based beam shaping. Different shapes of …

A new beam-shaping device was realized by an abrupt taper with a length of~ 700 μm and a
waist of~ 40 μm. The insertion loss of the device is less than 3%. The diameter of the flat …

A new class of all-fiber beam shaping devices has been realized by inverse etching the end
face of single mode and multimode fibers to form a concave cone tip. Concave tip fiber can …

Ow7ing to the flat center and steep edge, the flat-top beam is widely used in the fields of
micromachining and optical image processing. Here, we propose an efficient scheme to …

Few-mode based uniform beam shaping exploiting the use of different spatial modes has
been recently shown to improve the system resistance against pointing errors and link …