Topic
Bend radius
About: Bend radius is a research topic. Over the lifetime, 3303 publications have been published within this topic receiving 35415 citations. The topic is also known as: minimum bend radius.
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30 Nov 2004
TL;DR: In this paper, the authors measured the damage threshold of 8 μm and 22 μm-core diameter hollow-core photonic band gap (PBG) fibres with a 1.06 μm Nd:YAG laser (30 nsec pulses at 10 Hz).
Abstract: Laser damage thresholds of 8 μm- and 22 μm-core diameter solid-core photonic crystal fibres (PCF) and hollow-core photonic band gap (PBG) fibres have been measured. The studies were carried out using a 1.06 μm Nd:YAG laser (30 nsec pulses at 10 Hz), which is optimally coupled into these fibres by careful mode matching, providing a coupling efficiency greater than 90%. It has been shown that the damage threshold of the 8 μm core PBG fibre occurs at pulse energies close to 1 mJ, equivalent to a fluence well in excess of 1 kJ/cm 2 propagating down the fibre. This is a factor of 4 larger than the damage threshold of a solid-core PCF of similar core diameter. In comparison, the damage threshold of the large-core PBG is smaller than that of the equivalent PCF. Theoretical modelling based only on the optical modal properties of the single-mode PBG fibre shows that an enhancement by a factor of 25 should be obtainable. Thus there are different damage mechanisms potentially responsible for the fragility of larger-core PBG fibres. In an experimental study of bend losses it has been found that it is possible to bend the 8 μm PBG fibre up to the breaking point bend radius (<1 mm). The critical bend radius for the 22 μm core PBG is close to 2 mm, which is 50 times smaller than the critical bend radius of a 20 μm core PCF.
27 citations
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20 Jun 2006
TL;DR: A cable support assembly for routing electrical, communication, or data cables throughout a building is described in this paper, where cable trays and brackets are used to secure the cables to an overhead structure and couplers are provided for coupling trays together.
Abstract: A cable support assembly for routing electrical, communication, or data cables throughout a building. The cable support assembly includes cable trays and brackets for securing the cable trays to an overhead structure. Tray couplers are provided for coupling trays together. The brackets include a base member and a hinge arm pivotally attached to the base member. The brackets are first secured to the overhead structure to establish a desired path for the cables. The hinge arms on the installed brackets are pivoted downwards and a cable tray section inserted therein. The hinge arms and cable tray sections may be rotated upwards and latched to the base members to lock the cable trays in place. Adjacent cable trays may be joined with couplers to create a cable support assembly in which the cable tray provides support for any electrical, communication, or data cables installed therein.
27 citations
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TL;DR: In this article, a comprehensive analysis of micron particle deposition in laminar pipe bend flows is presented, which includes combinations of 8 pipe diameters, 9 bend radii, 3 Reynolds numbers, and 30 particle diameters (from 1μm to 100μm).
27 citations
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TL;DR: In this paper, the authors studied the mechanical stability of poly-Si thin-film transistor on 50mm flexible metal foil with a field effect mobility of 81.2 cm 2 /V/s, a threshold voltage of −2.4 V, and an on/off current ratio of 10 6.
Abstract: We have studied the mechanical stability of poly-Si thin-film transistor on 50 μm-thick flexible metal foil with a field-effect mobility of 81.2 cm 2 /V s, a threshold voltage of −2.4 V, and an on/off current ratio of 10 6 . We have measured the electrical properties under various compressive and tensile strains by changing the bending radius of the base metal foil. We have found that the TFT is stable until the bending radius of 50 mm which corresponds to the strain of ∼1.4%.
27 citations
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TL;DR: In this paper, the bending properties of multilayer organic-inorganic barriers were measured by an electrical calcium test before and after a repeated bending cycle of 10,000 times with various bending radii.
27 citations