Bend loss in multimode chalcogenide fiber at infrared wavelengths

Gattass, Rafael R.; Kung, Frederic H.; Busse, Lynda E.; Shaw, L. Brandon; Sanghera, Jasbinder S.

doi:10.1117/1.oe.53.1.010502

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…That shows the cumulative behaviour of macro-bending loss. Coupling and scattering losses are constant and not cumulative [19,28,29]. The only cumulative losses in optical waveguides are absorption losses and macro-bending losses.…”

Section: Resultsmentioning

confidence: 99%

“…Macro-bending loss occurs when such a guide is bent beyond a critical radius [28,29]. Macro-bending loss is already used to measure stress, strain and level of liquids by measuring the loss of the optical signal through fused silica or polymethyl methacrylate (PMMA) waveguides [19,20]. The equation of macro-bending loss is given by ( ) where n 1 is the refractive index of core, k is propagation constant = p l k , 2 λ is the wavelength, q c is the critical angle ( )…”

Section: Methodsmentioning

confidence: 99%

“…Previous researchers have used polymethyl methacrylate (PMMA), shaped as a coil as a sensor for detecting strain, stress, temperature and environment change, by measuring the change of total attenuation loss of light transmitted through the coil [15][16][17][18]. External stimuli that can be detected include external deformation stress/strain, heat or change of refraction index of the surrounding material [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Strain and temperature sensors made from fishing lines

Stanojevic¹,

Chauhan²

2022

Eng. Res. Express

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Soft and flexible sensors are demanded in a wide variety of wearables and soft-robotic applications. We designed and developed novel integrated strain and temperature sensors using super-coiled transparent polymer fibres as an optical waveguide by exploiting changes in macro-bending optical losses induced by strain or heat. Polymers used in this research such as nylon and fluorocarbon are shaped as super-coils. The customized optical couplings were designed that can sustain tension induced by axial strain force or thermal stress (entropic spring effect). A customized method of transmission and measurement of the optical signal transferred through a super-coiled polymeric waveguide was designed to reduce attenuation losses. Transmitted optical signal were recorded in the . Changes in the measured transmitted optical signal were recorded and comparedfor transparent mono-filament nylon fibre fishing line and fluorocarbon fibre fishing line. The trends of the measured parameters registered during the testing period showed a variation of ~2%, good linearity and repeatability, however with minor hysteresis in the range of ~4% for nylon and in the range of ~2.5% for fluorocarbon. Limited optical characteristics of these materials were compensated and substituted by high sensitivity introduced by a small macro-bend radius. These sensing devices combine high sensitivity with large comparative strain and a wide range of temperatures. Polymers used in this research exhibit the potential for use in SCP waveguide-based soft robotic sensors. Measured reaction times validate the potential of these sensors in measurements of moderate or slow speed processes. These sensing devices also combine a simple manufacturing process that uses abundant and cost-effective materials with a wide array of potential applications.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Strain and temperature sensors made from fishing lines

Stanojevic¹,

Chauhan²

2022

Eng. Res. Express

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“…Bending losses have been measured for As 2 S 3 chalcogenide fibers, motivated by interest in smaller fiber-based packages, with negligible losses down to 20 mm bending radius for multimode fibers and 6.25 mm for single-mode fibers [55]. Similar tests for fluoride and tellurite fiber have not been published.…”

Section: Mechanical Strengthmentioning

confidence: 98%

Review of infrared fiber-based components

et al. 2015

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The infrared range of the optical spectrum is attractive for its use in sensing, surveillance, and material characterization. The increasing availability of compact laser sources and detectors in the infrared range stands in contrast with the limited development of optical components for this optical range. We highlight developments of infrared components with a particular focus on fiber-based components for compact optical devices and systems.

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Fabrication and characterization of multimaterial Ge25Se10Te65/As2S3 chalcogenide fiber with a high value of the numerical aperture

Peng

et al. 2019

Journal of Non-Crystalline Solids

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Bend loss in multimode chalcogenide fiber at infrared wavelengths

Cited by 5 publications

References 17 publications

Strain and temperature sensors made from fishing lines

Strain and temperature sensors made from fishing lines

Review of infrared fiber-based components

Fabrication and characterization of multimaterial Ge25Se10Te65/As2S3 chalcogenide fiber with a high value of the numerical aperture

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