Ray‐Tracing‐Based Modeling of Clad‐Removed Step‐Index Plastic Optical Fiber in Smart Textiles: Effect of Curvature in Plain Weave Fabric

Moon, Sun Hee; Lee, Joon Seok; Sul, In Hwan

doi:10.1155/2018/1672369

Cited by 3 publications

(11 citation statements)

References 34 publications

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“…Note that the x-axis of the graphs in Figure 12 was curvature, which was inversely proportional to radius. In our previous work [1], PGR-FB250, PGR-FB750, and especially PGR-FB1000 specimens showed an erroneous behavior. is implied that the bigger the radius, the greater is the di culty in controlling the depth of cladding removal.…”

Section: Comparison Of Cladding Removal Methodsmentioning

confidence: 74%

“…However, it has several problems such as washing durability or wearability with regard to garments. In this paper, we suggest another information delivery media, i.e., "light" [1]. Lightbased communication technology such as optical fibers is already being used actively since the 1970s [11].…”

Section: Literature Reviewmentioning

confidence: 99%

“…Step Ray-Tracing Algorithm. Our previous work [1] used a small-time-step-based ray-tracing strategy, in which light vectors advanced by the length of its wavelength at each time frame. is resulted in redundant calculation ( Figure 5) and several round-o errors especially at ber interfaces.…”

Section: Large-mentioning

confidence: 99%

“…Moreover, there were several errors in the vector direction especially when the vector resided at the core/cladding or cladding/air interface. e present study modifies the previous work [1] to deal with arbitrary weave structure more efficiently. e freeform deformation (FFD) technique was applied to control the shape of the fibers arbitrarily.…”

Section: Introductionmentioning

confidence: 96%

“…Ray tracing was already used in our previous work [1] for a plain weave structure with a POF whose entire cladding was removed radially. e amount of light transferred was successfully measured both theoretically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

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Large‐Time‐Step‐Based Ray‐Tracing Modeling of Light Delivery in One‐Sidedly Cladding‐Removed Step‐Index Plastic Optical Fiber under Arbitrary Weave Structure

Moon

Sul

2018

Advances in Materials Science and Engineering

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An advanced theoretical method to simulate the light delivery in plastic optical fiber is presented. e final objective is to use "light" as a new media for information delivery in wearable computers. A large-time-step-based ray-tracing algorithm, which was improved from our previous research, was used to simulate the light vector movement in a complex weave structure efficiently. NURBS and free-form-deformation-based modeling was used to mimic the arbitrary weave structure. Experimentally, optical fibers were modified to control the direction of light emission. Particularly, half side of a cladding layer in the radial direction was selectively removed to enhance one-sided fabric light scattering. e cladding-removed plastic optical fiber was adopted in a textile weave structure, and its light scattering was measured quantitatively by varying the removal length, fiber curvature, and fabric weave patterns. To show the validity of the proposed simulation technique, twill structures with varying number of cross repeat numbers were used as a testbed. e unit number 2 was found to be the optimal structure for light emission, when a single POF was embedded in the textile. e proposed model showed the similar result with the actual light intensity measurement, with computation time not much than one second.

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Section: Comparison Of Cladding Removal Methodsmentioning

confidence: 74%

Section: Literature Reviewmentioning

confidence: 99%

Section: Large-mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Large‐Time‐Step‐Based Ray‐Tracing Modeling of Light Delivery in One‐Sidedly Cladding‐Removed Step‐Index Plastic Optical Fiber under Arbitrary Weave Structure

Moon

Sul

2018

Advances in Materials Science and Engineering

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Experimental determination and ray-tracing simulation of bending losses in melt-spun polymer optical fibres

Lustermann

Quandt

Ulrich

et al. 2020

Sci Rep

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The damping properties and specifically the bend losses of polymer optical fibres (POFs) have so far only been documented by experimental work, investigating bending parameters such as bending radius, length, and distance of the bends. Even though damping mechanisms and causes are wellknown, no simple, generally valid formula exists. Here, a simulation technique is shown that allows producing an optical model for any bending geometries of melt-spun polymer optical fibres. The developed model takes all relevant loss mechanisms into account, especially regarding the scattering losses at the interface of core and cladding as well as those of the cladding-air interface. The latter is caused by interfacial roughness for which experimental data have been obtained by atomic force microscopy measurements. To show the validity of the simulation, the model is compared to experimental results for several fibres and a variety of geometries. The variance between model and experimental data is low (S < 4.6%). The model not only contributes to improving the understanding of the optical properties of POFs, but it also has direct applicability to the design of photonic textile sensors for medicine, where the fibres are incorporated with small bending radii.

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Utilization of smartphones for the evaluation of Gr/Ni nanostructures magnetically controlled based on optical fibers surface plasmons

Ilbeygi¹,

Sharifi²,

Jahanbakhshian³

et al. 2023

Opt. Express

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In the suggested optical fiber-based magnetoplasmonic system, we investigated the magnetic properties of graphene/nickel nanostructures. The plasmonic mode changes under the magnetic field observed in the intensity diagrams over time. To be accessible, cheap, and portable, we used a smartphone as a detector and processor. Considering the ambient noise and the light source, it was reported that the intensity of the changes improved up to 5 times. Further, the clad corrosion experiment carried out by pure dimethyl ketone in an intensity modulation by a smartphone camera and 10 seconds suggested removing fluorine polymer clad.

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Ray‐Tracing‐Based Modeling of Clad‐Removed Step‐Index Plastic Optical Fiber in Smart Textiles: Effect of Curvature in Plain Weave Fabric

Cited by 3 publications

References 34 publications

Large‐Time‐Step‐Based Ray‐Tracing Modeling of Light Delivery in One‐Sidedly Cladding‐Removed Step‐Index Plastic Optical Fiber under Arbitrary Weave Structure

Large‐Time‐Step‐Based Ray‐Tracing Modeling of Light Delivery in One‐Sidedly Cladding‐Removed Step‐Index Plastic Optical Fiber under Arbitrary Weave Structure

Experimental determination and ray-tracing simulation of bending losses in melt-spun polymer optical fibres

Utilization of smartphones for the evaluation of Gr/Ni nanostructures magnetically controlled based on optical fibers surface plasmons

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