There are great challenges in the generation of higher-order modes for long period fiber
grating (LPFG). The cross-coupling coefficient between the fundamental mode and the …

We propose and demonstrate the inscription of parallel long-period gratings (LPGs) in a few-
mode fiber (FMF) using femtosecond lasers. Mode conversion from the fundamental (LP_01) …

摘要随着光通信网络的发展, 高性能宽带模式转换器成为了迫切需求. 提出并实验制备了强调制
相移少模光纤螺旋长周期光栅, 其可以实现全光纤宽带轨道角动量模式转换器的功能 …

Helical-core fibers have been widely utilized for various applications such as orbital angular
momentum manipulation, optical filtering, and sensing. In this work, we demonstrate the …

All-fiber mode converters for generating orbital angular momentum (OAM) beams have
many applications in optical communications, optical sensing and lasers. Currently, it is a …

Lights carrying orbital angular momentum (OAM), also called twisted lights, have been
applied in fields of optical manipulation, imaging, quantum communication, and mode …

It is the basic characteristic of pure vortex light that there is a phase singularity at the origin.
Such a singularity may be multiple degenerate, which determines the order of vortex light …

The orbital angular momentum (OAM) of light is particularly promising for multi-channel data
transmission in optical fiber communications. In the implementation, one of the impediments …

Long-term monitoring of the heartbeat and respiration of patients is critical for adjusting their
care. However, current approaches are limited by skin contact, which may cause discomfort …

A new method enabling to provide an on-demand flat-top wideband orbital angular
momentum (OAM) mode converter is proposed and experimentally demonstrated, which is …