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Light propagation in multimode fibers is known to experience various nonlinear effects, which are being actively studied. One of the interesting effects is the brightness enhancement at the
A fiber Bragg grating is a periodic alteration of core refractive index which is formed by exposure of the optical fiber core to a spatially modulated laser light . The formation of refractive index modulation
Random fiber gratings (RFGs) have shown great potential applications in fiber sensing and random fiber lasers. However, a quantitative relationship between the degree of randomness of
Bragg grating refers to a permanent modulation of the index of refraction in optical fibers, functioning as a filter that reflects specific wavelengths of light when exposed to a broadband spectrum, with
A high-efficiency Brillouin random fiber laser (BRFL) with high frequency stability based on fiber Bragg grating ring (FBGR) is proposed and demonstrated. The FBGR consists of a section of
The reflection spectrum of the RFG is designed to ensure the stable single-peak emission of the RDBR-FL under the HR-FBG spectral filtering. The bandwidth of the selected reflection peak of the RFG is
The numerical modeling of fiber Bragg gratings is essential for understanding their optical behavior and optimizing their performance for specific applications.
ABSTRACT: The spectral response of the uniform FBG with different grating parameters such as grating length and index change are provided and discussed. The coupled mode theory is a suitable tool for
A narrow-band high-reflection fiber Bragg grating at the end of the Fabry-Perot cavity can easily implement spectral filtering to ensure that the RRFL only lases at the wavelength of the highest
We propose and demonstrate the power scalability in a novel random Raman fiber laser (RRFL) with localized random feedback provided by an ultrashort low-reflection random fiber grating...
By introducing refractive index modulations with random periods in the fiber core, RFGs can mimic Rayleigh scattering in the fiber with a broadband reflection spectrum.
Abstract In-fiber Bragg grating filters continue to proliferate, and their applications expand with the rapid advancement of fiber optic component fabrication techniques. Mathematical models for
Based on the coupled mode theory of fiber Bragg grating, OptiGrating software was used to simulate the main factors affecting the reflection spectrum of fiber Bragg grating (FBG) and cascaded FBG, and
Abstract A switchable dual-wavelength random fiber laser (DW-RFL) with compact structure and a low-threshold is demonstrated. A Fabry-Perot interferometer which consists of a pair
For example, some sensors use Fabry-Pérot Interferometry (FPI). Some sensors use Fiber Bragg Grating (FBG) technologies. Some sensors use intensity modulation techniques. Some of these
We propose a peak detection method for measuring fiber Bragg gratings (FBGs) using convolutional neural network (CNN) to improve the performances of wavelength division multiplexing.
We propose and demonstrate a novelsingle-frequency erbium-doped random distributed Bragg reflector fiber laser (RDBR-FL) constructed by a random fiber grating (RFG) and a high-reflection fiber Bragg
In this paper, we use an iterative method to directly solve the coupled equations after obtaining the transverse coupling coefficient of every position along z. Transmission property of any
Fiber Bragg gratings are reflective structures in the core of an optical fiber with a periodic or aperiodic perturbation of the effective refractive index.
In this paper, numerical solutions for the revered optical fiber Bragg gratings that are considered with a cubic-quintic-septic form of nonlinear medium are constructed first time by using an
Abstract Fiber Bragg gratings (FBGs) with random fluctuations are investigated theoretically by using the coupled-mode theory. The fluctuation of the period causes interference
When selecting a Bragg grating, the key specifications include center wavelength, reflection bandwidth (FWHM), peak reflectivity, and side-lobe suppression; for volume gratings the glass thickness
The Bragg wavelength is a function of the refractive index of the fiber core and the grating period. If the grating is exposed to external perturbations, such as strain and temperature, the Bragg
In order to reduce the pumping threshold and achieve a short-cavity single-mode transmission with a narrow-linewidth random fiber laser, we propose a tunable random fiber laser