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Fiber Bragg gratings with grating planes tilted at small angles relative to the fiber axis perpendicular couple light to core and cladding modes propagating backwards. The resonant wavelength for each
Figure 9.1 shows the experimental transmission spectrum of a 12-degree, 2 cm-length TFBG in air. The core mode resonance (usually referred to as the “Bragg resonance”) is located at the longest
In this paper, based on the coupled-mode theory, we investigate the spectral characteristics of uniform tilted fiber gratings. General formulas are derived for the spectral
This paper presents a high sensitivity liquid refractive index (RI) sensor based on lossy mode resonance (LMR) effect. The D-shaped fibers coated with nanosized titanium dioxide (TiO2)
A dual‐channel surface plasmon resonance (SPR) sensor is proposed, based on an elliptical‐core double‐hollow fiber that integrates subwavelength gratings (SWGs).
Tilted fiber Bragg gratings with different tilt angle were fabricated for the measurement of surrounding refractive index (SRI). The resonance wavelength of cladding modes found to disappear
Abstract: We have numerically and experimentally presented the diffraction characteristics of radiated tilted fiber grating (RTFG) in terms of the spectrum, bandwidth, degree of polarization, angular
1.2 Types of Fiber Bragg Gratings Fiber Bragg Gratings (FBGs) are classified based on their refractive index modulation profile, periodicity, and spectral response. The primary types include uniform,
On the basis of the coupled-mode theory, a detailed investigation of the optical spectral characteristics is presented for uniform tilted fiber gratings. Explicit expressions are derived for the
The DFB laser array based on 2D sampling structure and tilted grating is demonstrated with high uniform wavelength spacing at 300 GHz, provides an extraordinary avenue for designing wavelength
Fu Liu and Tuan Guo Tilted fiber Bragg gratings (TFBGs), i.e., tilt of the grating plane breaking the cylin-drical symmetry of the fiber, are inscribed in standard telecom single mode fiber without physical
2. The image display apparatus according to claim 1, wherein the parallel reflection surfaces comprise a total reflection surface formed on one of the parallel reflection surfaces and a semi-transmissive
Scattering from tilted fiber gratings into free space is useful in various filtering and monitoring applications. We develop a waveguide-scattering analysis based on the coupled-mode theory and
Abstract This chapter reviews the recentachievements of 45°-tilted fiber gratings (45°-TFGs) in all fiber laser systems, including the theory, fabrication, and characterization of 45° TFGs and 45° TFG
Abstract: coupled-mode equations, the formula of fiber grating is deduced in this paper. Numerical simulations and theoretical analysis of the effects of the tilt angle on bandwidth and maximum
In this paper, we have numerically and experimentally investigated the radiation mode of 45° tilted fiber grating (45° TFG). By introducing the axial distributions into the volume current
In this paper, we describe the spectral characteristics that can be achieved in fiber reflection (Bragg) and transmission gratings. Both principles for understanding and tools for designing fiber gratings are
Experimentally we show coupling to both higher-order bound core modes and cladding modes in a transmissive tilted grating at visible and near-infrared wavelengths.
Abstract: In this paper, the mode coupling mechanism of tilted fiber Bragg gratings (TFBGs) is briefly introduced at first. And a general review on the fabrication, theoretical and experimental research
Abstract: Based on the full vector complex coupled mode theory, a detailed analysis is made on the transmission spectrum characteristics of tilted long period fiber gratings. New transmission peaks are
This article reviews the characteristics and properties of various modes in tilted fiber Bragg gratings (TFBGs). It explores the fundamental theory and optical characteristics of radiation modes,
Tilted fiber Bragg gratings (TFBGs), i.e., tilt of the grating plane breaking the cylindrical symmetry of the fiber, are inscribed in standard telecom single mode fiber without physical modification, which
In this paper the comparative study of spectral transmission characteristics of tilted Bragg gratings made using uniform phase mask and chirped phase mask are presented.
Radiation-mode coupling is stronger and more efficient in tilted fiber Bragg gratings than in other fiber gratings; it can be used to good advantage in such fields as optical communication and
In order to design a high-sensitive fiber-grating-based film sensor, the coupling features and sensing characteristics to the film refractive index of tilted long-period fiber gratings (TLPFG) coated with high