Diffraction analysis of layered structures of photorefractive gratings

Vré, Raymond De; Hesselink, Lambertus

doi:10.1364/josaa.13.000285

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…They have replaced bulk optic mirrors and beam splitters in equipment, which increases system stability and portability. In-depth theoretical analyses of the electromagnetic wave propagation through periodic structures in general [1][2][3] and FBGs in particular [4][5][6] can be found elsewhere.…”

Section: Theory and Operation Of Fiber Bragg Gratingsmentioning

confidence: 99%

Development and performance verification of fiber optic temperature sensors in high temperature engine environments

Adamovsky¹,

Mackey²,

Floyd³

et al. 2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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A High Temperature Fiber Optic Sensor (HTFOS) has been developed at NASA GlennResearch Center for aircraft engine applications. After fabrication and preliminary in-house performance evaluation, the HTFOS was tested in an engine environment at NASA Armstrong Flight Research Center. The engine tests enabled the performance of the HTFOS in real engine environments to be evaluated along with the ability of the sensor to respond to changes in the engine's operating condition. Data were collected prior, during, and after each test in order to observe the change in temperature from ambient to each of the various test point levels. An adequate amount of data was collected and analyzed to satisfy the research team that HTFOS operates properly while the engine was running. Temperature measurements made by HTFOS while the engine was running agreed with those anticipated. Nomenclature d 1 = Outer diameter of a smaller diameter ceramic tube d 2 = Outer diameter of a larger diameter ceramic tube dn = infinitesimal change in the refractive index dT = infinitesimal change in temperature 2 N = number of grating line spacings in a grating n = refractive index P i,j = Pockel's coefficient of the stress-optic tensor α = coefficient of thermal expansion of the fiber material Δn = longitudinal periodic variation of the refractive index of the optical fiber core in a grating ΔT = temperature change Δλ = full-width-half-maximum bandwidth of a grating = shift in the Bragg wavelength due to temperature and pressure ε = applied strain  G = grating period λ G = Bragg wavelength ν = Poisson's ratio

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Section: Theory and Operation Of Fiber Bragg Gratingsmentioning

confidence: 99%

Development and performance verification of fiber optic temperature sensors in high temperature engine environments

Adamovsky¹,

Mackey²,

Floyd³

et al. 2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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“…The other feature was a sharpening of the angular selectivity through the combination of multiple layers according to coupled wave theory . De Vre and Hesselink followed this with a theoretical analysis of the diffraction from layered photorefractive films providing closed form solutions for diffraction efficiency and Bragg selectivity for this type of device . Grunnet‐Jepsen et al employed this configuration to develop an externally adjustable gain device for a photorefractive polymer optical amplifier.…”

Section: Photorefractive Polymersmentioning

confidence: 99%

“…2 De Vre and Hesselink followed this with a theoretical analysis of the diffraction from layered photorefractive films providing closed form solutions for diffraction efficiency and Bragg selectivity for this type of device. 116 Grunnet-Jepsen et al employed this configuration to develop an externally adjustable gain device for a photorefractive polymer optical amplifier. While photorefractive gain has reached values over 200 cm 21 , the physically obtainable response is significantly smaller due to the thin layers.…”

Section: Electrodesmentioning

confidence: 99%

Photorefractive polymers for holography

Lynn

Blanche

Peyghambarian

2013

J Polym Sci B Polym Phys

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This review describes the current state-of-the-art of photorefractive polymers for holography. The analysis of this rich field begins with a brief historical perspective followed by descriptions of prevailing physical models relating basic parameters of the polymer constituents to the bulk response of the final device. Methods for probing these responses and the underlying phenomena are discussed followed by an overview of the recent holographic applications of photorefractive polymers.

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“…Holographic gratings recorded in photorefractive materials can be considered theoretically as dielectric Bragg gratings, because they alternate layers with different refractive indexes [11,12]. Although holographic gratings have a sinusoidal profile of the index of refraction (rugate filters), we can assume it as a discrete multilayer stack, since they exhibit properties similar to a multilayer constructed from a series of discrete layers of alternate high and low indexes (index profile discrete), but without the higher-order reflection stopbands [13].…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Rewritable Narrowband Filter in a Sbn:75 Crystal

Rubio-Saavedra¹,

Seifert²,

Aguilar³

et al. 2020

PIER C

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We propose a rewritable optical frequency filter based on a volume Bragg grating recorded by holography on an SBN:75 photorefractive crystal. The theoretical results show the possibility of implementing a narrow-band filter whose reflectance is total for the characteristic wavelength of the third harmonic of the infrared for both TE and TM polarizations by optimizing the size of the interference fringes and the angle of incidence of the beam to be filtered, which must be close to 80 degrees.

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Diffraction analysis of layered structures of photorefractive gratings

Cited by 8 publications

References 21 publications

Development and performance verification of fiber optic temperature sensors in high temperature engine environments

Development and performance verification of fiber optic temperature sensors in high temperature engine environments

Photorefractive polymers for holography

Optimization of a Rewritable Narrowband Filter in a Sbn:75 Crystal

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