Fabrication and characterisation of ultra-long-period fibre gratings
We report here, for the first time to our knowledge, the fabrication and characterisation of LPFGs with periods up to several millimetres. Potentially, these ultra-long-period gratings may offer
Ultra-widely tunable long-period holey-fiber grating by the use of
Abstract Wereportan ultra-widely tunable long-period holey-fiber grating, which combines the wide-range single-mode behavior and transverse strain sensitivity of the holey fibers with the advantages of
Sinusoidal-Core Long Period Fiber Grating for Refractive Index
Optic fiber sensors for refractive index (RI) measurement have brought about widespread attention in an extensive range owing to their unique properties. In this paper, we theoretically
Ultra-long-period grating-based multi-wavelength ultrafast fiber laser
We propose and demonstrate the cascaded multi-wavelength mode-locked erbium-doped fiber laser (EDFL) based on ultra-long-period gratings (ULPGs) for the first time, to the best of our knowledge.
Ultra Long Period Reversible Fiber Gratings as a Pressure Sensor
We report here for the first time the fabrication and characterization of mechanically induced ultralong period fiber gratings (MULPFG) with period size up to several millimeters. In these gratings the
Ultra-long-period grating-based multi-wavelength
We propose and demonstrate the cascaded multi-wavelength mode-locked erbium-doped fiber laser (EDFL) based on ultra-long-period gratings (ULPGs) for the first time, to the best of our knowledge.
Study on Characteristics of Ultra-Long-Period Fiber Gratings Written
A novel ultra-long-period fiber grating with periods of up to several millimeters induced by high-frequency CO2 laser pulses is reported, for the first time to our knowledge. The refractive index change occurs
Chirped Fiber Grating Market Size, Trends, 2026-2033
Chirped fiber gratings are increasingly embedded in smart city infrastructure, industrial automation, and autonomous vehicle systems, enabling ultra-fast data transmission and real-time
pH Sensor Through a Self-Assembled Multifunctional Layer With
In this study, Clitoria ternatea was used to provide a quantifiable method for pH measurement. The researchers proposed a new pH measurement method that involves the use of a
Long Period Fibre Gratings
2. Fabrication methods of long-period fibre gratings The inscription of long-period gratings on optical fibre basically consists in the generation of a periodical perturbation of the refractive index in the
Fabrication and characterisation of ultra-long-period fibre gratings
We report here for the first time the fabrication and characterisation of long-period fibre gratings (LPFGs) with period size up to several millimetres. The resonant loss peaks of these ultra
Ultra-long-period fiber grating cascaded to a knob-taper for
This study presents a simple Mach–Zehnder interferometer (MZI) to obtain the bimodal characteristics that realize simultaneous measurement of strain and temperature through cascading
A Compact Ultra-Long Period Fiber Grating Based on Cascading Up
A fiber grating with length of 2mm is fabricated by cascading three up-tapers on a single mode fiber, which is the shortest ultra-long period fiber grating up to now.
Structure-Modulated Long-Period Fiber Gratings: A
This review synthesizes and categorizes a class of novel long-period fiber gratings (LPFGs) engineered through the modification of the external
Ultrabroadband Long-Period Fiber Gratings for Wavelength-Tunable
Abstract: An ultrabroadband long-period fiber grating with 10-dB bandwidth of 155 nm and 3-dB bandwidth of 415 nm is demonstrated around an optical wavelength of 1060 nm in a few-mode
Ultra-long-period fiber grating cascaded to a knob-taper for
A simple MZI was presented using an ultra-long-period fiber grating (ULPFG) and knob-shaped taper. Experimental results indicated that the proposed structure realized simultaneous
Characteristics of novel ultra-long-period fiber gratings fabricated by
A novel ultra-long-period fiber grating with periods of up to several millimeters induced by high-frequency CO 2 laser pulses is reported, for the first time to our knowledge. The refractive index
Determination of Optical Fiber Parameters Based On Fiber Gratings
We demonstrated a new method to determine the optical fiber parameters using long-period fiber gratings and a search procedure. The gratings with different pitches were inscribed to
Quasi-Helical Long-Period Grating Full-Vector Sensor for Integrated
This paper presents and demonstrates a composite sensor based on in-line three-core fiber (ITCF) and quasi-helical long-period fiber grating (QHLPG). This sensor is fabricated by periodically
Ultra-long-period fiber gratings | IEEE Conference Publication | IEEE
Abstract: We report here for the first time the fabrication and characterisation of long period fiber gratings with periods of several millimetres. The resonant loss peaks of these gratings
A Compact Ultra-Long Period Fiber Grating Based on Cascading Up
A new ultra-long period fiber grating constructed by a series of up tapers is proposed and demonstrated experimentally. A fiber grating with length of 2mm is fabricated by cascading three up-tapers on a
A miniature ultra long period fiber grating for simultaneous
A SMF-MMF-SMF-ultra long period fiber grating (SMS-ULPFG) sensor is proposed for the simultaneous measurement of axial strain and temperature. The all
A new ultra long-period fiber grating for measuring torsional
In this paper, we proposed a novel kind of periodic helical ultra-long period fiber grating (U-LPFG) for measuring the torsion rate and distinguishing the torsion direction. The sensor was
Seven-core fiber embedded ultra-long period grating for curvature
A novel, low-cost sensor based on seven-core fiber embedded ultra-long period grating has been proposed and discussed in detail.
Ultra-short long-period fiber grating based on a micro air
A new type of long-period fiber grating is proposed and demonstrated. The structure of the device consists of a few micro air-channels