Hua Zhao

TL;DR: In this paper, a novel fiber sensor, which enables us to simultaneously measure the torsion, strain, and temperature, is proposed and experimentally demonstrated, which is based on utilization of two successively cascaded helical long-period fiber gratings (TSC-HLPGs).

TL;DR: The proposed method opens a new way to efficiently generate an all-fiber higher-order OAM using a conventional multimode fiber, which is realized based on utilization of a second-order helical fiber grating written in a few-mode fiber.

TL;DR: In this paper, an all-fiber orbital angular momentum (OAM) mode generator enabling simultaneous generation of the second and the third-order OAM modes with conversion efficiencies larger than 95% has been proposed and experimentally demonstrated by using a high-order helical long-period fiber grating (HLPG) written in a thinned four-mode fiber.

TL;DR: In this paper, a DC-sampling method for the generation of a multichannel helical long-period fiber grating (HLPG) has been proposed, which can greatly facilitate the fabrication of the multi-channel HLPG by using the CO2 laser writing technique.

TL;DR: Instead of inscribing the discrete phases into each local period of the seed HLPG, an equivalent approach to realize the phase-only sampled multichannel helical long-period fiber grating (HLPG) has been demonstrated both theoretically and experimentally as mentioned in this paper.