Transmission performance of fibre-optic bundle for solar lighting

Kandilli, Canan; Turkoglu, A.; Ülgen, Koray

doi:10.1002/er.1436

Cited by 26 publications

(12 citation statements)

References 19 publications

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“…In last twenty years, optical fibers, currently used in telecommunication systems, have also been investigated for transmitting high powers in medicine 1,2 , lighting and heating systems 3,4 , special electrical power stations 5 , etc. One may expect that the transmission of energy by optical fibers provides us with an alternative to the traditional methods for transfer of heat or electricity 6 .…”

Section: Introductionmentioning

confidence: 99%

Comparison of characteristics of Bragg fibers with silica and air cores

et al. 2015

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This paper presents the comparison of experimental characteristics of two types of Bragg fibers, one with a silica core and second with an air core. The claddings of the fibers consist of three pairs of Bragg layers. Each pair is composed of one layer with a high and one layer with a low refractive index with a refractive-index contrast of about 0.03. The diameter of the silica core is of about 30 μm and that of the air core is of about 55 μm. Preforms of the Bragg fibers in the form of a tube have been prepared by the MCVD method by using germanium dioxide, phosphorous pentoxide and fluorine as silica dopants. In the case of the fiber with the air core only Bragg layers were applied inside a substrate tube while in the case of the fiber with the silica core one additional silica layer was deposited over the Bragg layers. The fibers were drawn from the preforms under controlled temperatures in order to obtain fibers with air or solid cores. Results of characterization of prepared fibers by optical microscopy are presented. Several laser sources including a pulse and continuous-wave Nd:YAG lasers at 1064 nm and a laser diode at 1550 nm were used for testing the transmission of laser radiation through the fibers. Transmittances, attenuation coefficients, bending losses and spatial profiles of output beams from the fibers were determined from such measurements.

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Section: Introductionmentioning

confidence: 99%

Comparison of characteristics of Bragg fibers with silica and air cores

et al. 2015

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“…Daylight has an important effect on the alertness and mood of individuals (van Bommel and van den Beld 2004). People spending their days in nondaylight-permeating buildings may, therefore, be in biological darkness, contributing to reduced performance (Kandilli et al 2009). In summary, daylight offers health and psychological advantages, such as fewer absences at work (Andr e and Schade 2002) and greater productivity.…”

Section: Visual Effects Of Lightingmentioning

confidence: 99%

“…It is important to choose fibers with large NAs because they feature large differences in the refractive indices of the core and the outer shell of the fiber, called a cladding (Liang et al 1998). The primary advantage of lighting systems with solar concentrators is the potential to reduce energy consumption to a greater extent than conventional systems can (Kandilli et al 2009). Moreover, some studies have focused on the transmission of concentrated solar energy through single strands of OF or bundles of fibers, and it is noteworthy that an OF is a chemically resistant material that can be used in different environments.…”

Section: Proposed Building-envelope Solutionmentioning

confidence: 99%

Sunlight Permeability of Translucent Concrete Panels as a Building Envelope

Mosalam

Casquero-Modrego

2018

J. Archit. Eng.

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An innovative building envelope was introduced for daylight permeability in an anidolic manner through the opaque parts of exterior façades and roofs. A prefabricated translucent concrete panel (TCP) with embedded optical fibers (OFs) was coupled with a layer outfitted with compound parabolic concentrators (CPCs). Such TCPs have been predominantly used for aesthetic purposes. Moreover, OFs and CPCs have been used in many industries, particularly for telecommunications and the concentration of solar energy, respectively. The goal of this study was to introduce a novel building-envelope construction solution that can transmit sunlight to the interior of a building. Because of the nature of the traditional building materials blocking the passage of natural light, artificial lighting was constantly required, even during daytime, which consumed a great deal of energy in the form of artificial electrical light. This proposed building envelope is a viable solution to alleviate this inefficiency. Experimental results show the effectiveness and limitations of the proposed solution discussed in this paper.

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“…However, optical fibers have also been investigated for high power delivery in medicine [2][3][4], special electrical power stations [5], lighting and heating systems [6,7], for material processing in industry [8], etc. The energy delivery using optical fibers can provide us an efficient alternative to traditional methods for transfer of heat and electricity [9] or sun light transmission in solar systems [6]. Several types of all-glass optical fibers with solid cores have been tested for high power delivery such as silica fibers, sapphire fibers [2,10], germanium dioxide fibers [11], etc.…”

Section: Introductionmentioning

confidence: 99%