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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 transmits all others. This is achieved by creating a periodic variation in the refractive index of the fiber core, which generates a wavelength-specific dielectric mirror .
Figure 1: A schematic of a refractive index change of a 2π-FBG-type addressed fiber Bragg structure (a), its spectral response (b). λ B is the central (Bragg) wavelength, Ω is the address frequency, S 1 (λ) - S 3 (λ) denote transfer matrixes describing the uniform sections of the AFBS, S φ (λ) denotes transfer matrix describing the phase ...
Time-resolved simulation of a pulse reflecting from a Bragg mirror. A distributed Bragg reflector (DBR) is a reflector used in waveguides, such as optical fibers.It is a structure formed from multiple layers of alternating materials with different refractive index, or by periodic variation of some characteristic (such as height) of a dielectric waveguide, resulting in periodic variation in the ...
An infrared dielectric mirror in a mirror mount. A dielectric mirror, also known as a Bragg mirror, is a type of mirror composed of multiple thin layers of dielectric material, typically deposited on a substrate of glass or some other optical material.
Optical add-drop multiplexer, using a fiber Bragg grating and two circulators. An optical add-drop multiplexer ( OADM ) is a device used in wavelength-division multiplexing (WDM) systems for multiplexing and routing different channels of light into or out of a single-mode fiber (SMF).
Description: Pattern of fiber bragg grating, language neutral. = Grating period, n = Refractive index, P I = Input power, P R = Reflected power, P T = Transmit power, = Wavelength
Electrical voltage can be sensed by nonlinear optical effects in specially-doped fiber, which alter the polarization of light as a function of voltage or electric field. Angle measurement sensors can be based on the Sagnac effect. Special fibers like long-period fiber grating (LPG) optical fibers can be used for direction recognition [3].
The spectral response on the Fiber Bragg Grating shows how the incident broadband signal is split into the transmitted and reflected components, about the Bragg wavelength. Source Vectorized version of Image:Fbg.GIF. Date 2008-07-02 Author Sakurambo. Permission (Reusing this file) Original image FBG.GIF was released under a GFDL license Other ...
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