Long-period fiber gratings (LPGs) are widely used as sensors due to their high sensitivity to temperature, strain and refractive index , besides the inherent advantages of fiber sensors.
Ultra-Broadband Optical Filter based on Long-Period Fiber Gratings using Higher-Order Cladding Modes Myoung Jin Kim, Yong Min Jung, Bok Hyeon Kim, Won-Taek Han, and Byeong Ha Lee
We demonstrate the fabrication of long-period fiber gratings and helical long-period gratings in specialty fibers using focused carbon dioxide laser. The mode coupling and sensing
In this study, an all-fiber ±3-order orbital angular momentum (OAM) mode generator with ∼90% conversion efficiency is proposed and
We simulate a long-period grating in a multimode fiber, which can efficiently couple light from the fundamental mode to a specific higher-order mode. Frequently
We suggest a fiber micro-knot fabricated on a long-period fiber grating. The long-period fiber grating excites high-order modes into the micro-knot and transfers the output back to the Gaussian mode.
The fiber laser has the structure of three sub-ring-cavities. LP01 mode, LP11 mode and LP21 mode can be obtained by different few-mode long-period fiber gratings.
Long-period fiber grating was fabricated in six mode fiber by CO laser to realize mode conversion from LP mode to LP and LP modes with high efficiency. The second-order orbital angular momentum
Higher-order mode generation using long-period fiber grating (LPFG) has a lot of advantages such as simple structure and compatibility with optical fiber system.
The key to realize high-order mode fiber lasers is all-fiber mode conversion devices that can selectively excite specific high-order modes. Several mode conversion techniques have been
Fiber Bragg grating technology is popularly used in measurements of various physical parameters, such as pressure, temperature, and strain for civil
A high-order-mode Brillouin Random fiber laser with high purity and broadband tunability based on a long-period fiber grating and distributed Rayleigh scattering in optical fibers was demonstrated.
In this study, a polyethyleneimine/ poly (ethylene glycol) (PEI/PEG) coated optical fiber Fabry-Perot interferometer (FPI) and its charge transfer process towards CO 2 is investigated.
This paper presents a review of the evolution of LPFGs, with a specific focus on the progression and current trends of mechanically induced
A fiber Bragg grating (FBG) is a type of distributed Bragg reflector constructed in a short segment of optical fiber that reflects particular wavelengths of light and
In this work, a high-eficiency fabrication scheme for all-fiber 3-order OAM mode generator is proposed and experimentally demonstrated based on HLPFG written in a 6MF.
By using a helical long-period fiber grating (HLPFG) inscribed by an oxyhydrogen-flame, the fundamental mode ( LP 01 ) of the six-mode fiber (6MF) can be effectively converted into the
We propose and demonstrate the inscription of multi-cascaded long-period fiber gratings (LPFGs) in a few-mode fiber using a CO2-laser. The multi-cascaded LPFGs containing three gratings were
A high-sensitivity hot-wire anemometer is proposed for use with a cobalt-doped fiber (CDF) based long-period grating (LPG) heated optically by a 1480 nm laser. The CDF-LPG absorbs laser power and
Abstract and Figures A method for inscribing fiber bragg gratings (FBG) using direct, point-by-point writing by an infrared femtosecond laser was
We propose and demonstrate the fabrication of an all-fiber mode converter enabling to simultaneous generation of multiple high-order core modes, which is realized by inscribing helical
Long-period fiber gratings (LPFGs) functioning as band-reject filters have played a pivotal role in the realm of optical communication. Since their
A long-period fiber grating couples light from a guided mode into forward propagating cladding modes where it is lost due to absorption and scattering. The coupling from the guided mode to cladding
Long-period fiber gratings (LPFGs) are efficient ways to achieve high-order core mode conversion and vortex mode conversion in few-mode
In this paper, we report the high order diffraction (HOD) in thin-cladding fiber (TCF) long-period gratings (LPGs) near dual dispersion turning points (DTPs). The spectral performances and
We propose and experimentally demonstrate a high-order mode fiber laser based on few-mode fiber gratings. The fiber laser has the structure of three sub-ring-cavities. LP01 mode, LP 11
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