Light diffusing optical fiber for Illumination

Logunov, Stephan L.; Fewkes, Edward J.; Shustack, Paul J.; Wagner, Frederic C.

doi:10.1364/soled.2013.dt3e.4

Cited by 16 publications

(20 citation statements)

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“…The LDF chosen as the host platform (Fibrance ® by Corning ® , New York, NY, USA) is composed of a silica core with a diameter of 170 µm, and a low-index polymeric cladding with a diameter of 230 µm [15] (see Figure 1a). In the chosen LDF, the guided light is scattered radially outward through a plurality of helical voids randomly distributed in the core, and wrapped around the long axis of the optical fiber (see Figure 1b).…”

Section: Spr Sensor Based On An Ldfmentioning

confidence: 99%

“…In the chosen LDF, the guided light is scattered radially outward through a plurality of helical voids randomly distributed in the core, and wrapped around the long axis of the optical fiber (see Figure 1b). The pitch of the helical voids controls the amount of the side-emitted light, with smaller pitches scattering more light than larger pitches, while their diameter ranges in size from 50-500 nm; consequently, they scatter the propagating light almost independently of the wavelength of light used [15]. For our tests, a 2 cm length of the fiber was unclad by means of a Miller stripping tool.…”

Section: Spr Sensor Based On An Ldfmentioning

confidence: 99%

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Refractive Index Sensing through Surface Plasmon Resonance in Light-Diffusing Fibers

et al. 2018

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Abstract:In this paper, we show that light-diffusing fibers (LDF) can be efficiently used as host material for surface plasmon resonance (SPR)-based refractive index sensing. This novel platform does not require a chemical procedure to remove the cladding or enhance the evanescent field, which is expected to give better reproducibility of the sensing interface. The SPR sensor has been realized by first removing the cladding with a simple mechanical stripper, and then covering the unclad fiber surface with a thin gold film. The tests have been carried out using water-glycerin mixtures with refractive indices ranging from 1.332 to 1.394. The experimental results reveal a high sensitivity of the SPR wavelength to the outer medium's refractive index, with values ranging from 1500 to~4000 nm/RIU in the analyzed range. The results suggest that the proposed optical fiber sensor platform could be used in biochemical applications.

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Section: Spr Sensor Based On An Ldfmentioning

confidence: 99%

Section: Spr Sensor Based On An Ldfmentioning

confidence: 99%

Refractive Index Sensing through Surface Plasmon Resonance in Light-Diffusing Fibers

et al. 2018

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“…In our sample, the pitch is such that 90% of incoming light is scattered tside the fiber within the first 10 meters. The void diameter varies from 50 to 500 nm, scattering the ht almost independently of its wavelength [16]. The SPR sensor was fabricated by the use of a Miller stripping tool to remove the cladding along -cm length of the fiber.…”

Section: Spr Sensor Based On a Light-diffusing Fibermentioning

confidence: 99%

“…Comparing the new results with those achieved for the gold-coated SPR sensor, we show that the silver-coated sensor is more sensitive to RI changes and exhibits a higher SNR than the gold-coated sensor. Figure 1 shows the host platform, based on a light-diffusing fiber (Fibrance®by Corning®, New York, NY, USA) formed by low-index polymeric cladding with a diameter of 230 µm, and a core of silica with a diameter of 170 µm [16] . This fiber has a nominal numerical aperture (NA) of >0.5, and the guided light is scattered radially outward, as reported in Figure 1b, through helical voids in random manner distributed along the core and wrapped around the axis of the fiber.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Realizing Low-Cost Plasmonic Optical Fiber Sensors: Light-Diffusing Fibers Covered by Thin Metal Films

Cennamo

Zeni

Arcadio

et al. 2019

Fibers

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We have investigated, in a numerical and experimental way, a refractive index (RI) sensor based on surface plasmon resonance (SPR) in a silver-coated light-diffusing fiber (LDF). The experimental tests were conducted using water-glycerine mixtures with refractive indices ranging from 1.332 to 1.388. In the considered refractive index range, the experimental results show a sensitivity of the SPR wavelength to the outer medium’s RI ranging from 2600 to 4700 nm/RIU, which is larger than the sensitivity recently reported for a gold-coated LDF sensor (1200 to 4000nm/RIU). The silver-coated sensor is also shown to ensure a higher signal-to-noise ratio (SNR) compared to the gold-coated sensor.

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“…Created voids exhibit a very large index contrast relative to the surrounding glass and serve as strong efficient scattering features. When a majority of the void structures are placed in the high light intensity region of a waveguide, the loss of the light due to scattering may be well controlled [6]. This paper describes the efforts that we have made to generate an orderly, consistent loss of light down optical fibers of various lengths through the sides of the fiber and the extension of this ability to wavelengths outside the visible region to the UV and IR ranges.…”

Section: Introductionmentioning

confidence: 99%

Silica Nano-Structured Fiber for Illumination

Logunov

Bennett

Fewkes

et al. 2019

J. Lightwave Technol.

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This paper describes a novel fiber designed to produce uniform illumination in angular space along its length. The mechanism of light extraction from the silica glass guiding region is due to nano-sized gas filled voids formed during fiber preform consolidation and fiber draw process. The resulting effect creates an aesthetically pleasing line or string of light which provides a long, thin, and flexible illumination tool for a variety of designs or functional applications. The rate of light extraction is determined by size and number of the formed these elongated voids features. The scattering material in the secondary coating modifies the scattering distribution function to make it uniform in angular space. The rate of the scattering efficiency can be controlled by drawing conditions and light launch conditions from the light source. The spectral efficiency of scattering is very high due to use of pure silica and low-absorbance coating materials from UV through IR. The use of color conversion materials placed outside the secondary coating can be used to generate a wide range of colors using a blue wavelength light pump, including pure white colors with a color temperature ranging from 3000 to 10000 K. Finally, a range of aesthetic and functional illumination applications for this fiber are also discussed.

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Light diffusing optical fiber for Illumination

Abstract: We describe the design of thin, ~ 100-180 micron diameter, optical silica fibers for illumination. The fiber has a silica core with specially engineered scattering centers to scatter light through walls of the fiber across a wide wavelength range. OCIS codes: (160.6030), (160.2290

Cited by 16 publications

References 0 publications

Refractive Index Sensing through Surface Plasmon Resonance in Light-Diffusing Fibers

Refractive Index Sensing through Surface Plasmon Resonance in Light-Diffusing Fibers

A Novel Approach to Realizing Low-Cost Plasmonic Optical Fiber Sensors: Light-Diffusing Fibers Covered by Thin Metal Films

Silica Nano-Structured Fiber for Illumination

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