In this study, the behavior of FBGs under varying temperatures is modeled using Coupled Mode Theory (CMT), which provides an analytical framework for the coupling of forward and backward propagating m...
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We present a theoretical study on the mode coupling between core modes and cladding modes of the tilted long period fiber grating (TLPFG) in dual-mode fiber. The TLPFG can be applied
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We remove some ambiguities associated with the coupled mode description of light propagation in fiber Bragg gratings (FBC''s). We show, in particular, that different methods employed in the literature lead
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In this paper, we rigorously deduce the coupled-mode equations of a long-period fiber grating and fiber Bragg grating in their cascaded structure (CLBG), based on coupled-mode theory. Next, through the
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This paper presents analysis of spectral characteristics of Optical Fiber Bragg Gratings (FBG) for sensor applications. The FBG has been modeled by using the equations of couple mode
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In this paper, we generalize coupled-mode theory for describing the propagation of waves in metamaterial fiber Bragg grating. These equations were solved numerically and their validity were
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Abstract— The spectral characteristics of superstructure fiber Bragg gratings are analyzed numerically based on the coupled mode theory, simultaneously taking into account the counterdirec-tional guided
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The chiral fiber long-period gratings (CLPGs) could be fabricated by twisting a high-birefringence (Hi-Bi) fiber. However, when it is immersed into a material whose refractive index (RI) is
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Abstract A full vector complex coupled mode theory (CMT) for the analysis of tilted fiber gratings is presented.
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Figure 1: Evolution of mode powers in a long-period fiber grating, which couples light from the injected fundamental mode radiation into higher-order modes. This
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Polarization properties of chiral fiber gratings with the core enclosed by a non-circular equiwidth curve have been analyzed and examined numerically. Since the curve has multiple odd
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A full vector complex coupled mode theory (CMT) for the analysis of tilted fiber gratings is presented. With the combination of the perfectly matched layer (PML) and the perfectly reflecting
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In this paper, we have briefly review the developing history and recent advances made with regard to helical long-period fiber gratings (HLPGs) in three aspects, i.e., the mode-coupling
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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
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A novel theory, namely, Fourier mode coupling (FMC) theory for long-period fiber gratings (LPFGs) is proposed in this paper. During analyzing the co-propagating coupling between the core
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The complex coupled-mode theory (CMT) is applied to optical fiber grating structures of circular cross section. The radiative fields are treated in terms of discrete complex modes similarly to
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Abstract The mode coupling in the tilted long period fiber grating (TLPG) is analyzed by using the full vector complex coupled mode theory (FV-CCMT). Compared with the non-tilted LPG,
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The complex coupled-mode theory (CMT) effectively models optical fiber grating structures with circular symmetry. The reduced CMT simplifies the
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The present study investigated the temperature sensing characteristics of Fiber Bragg Gratings (FBGs) through a theoretical framework based on Coupled Mode Theory (CMT) and validated the analysis
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Abstract We derive the coupled-mode equations for a metamaterial fiber Bragg gratings (FBGs). The coupled-mode theory describing wave propagation in periodic structures such as FBG
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ABSTRACT We describe the behavior of long period gratings (LPG) in 980nm pumped Erbium doped optical fibers. We have reformulated the coupled mode analysis of long period gratings to incorporate
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Types of DFB Lasers Most distributed-feedback lasers are either fiber lasers or semiconductor lasers, operating on a single resonator mode (→ single-frequency
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