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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TL;DR: Tunable Fano-like resonances are demonstrated numerically in a single Fabry-Perot resonator made of a bent single-mode waveguide, and it is believed that the presented results open up a new degree of freedom in designing bent waveguide-based refractometers, as well as other photonics elements utilizing cladding modes in bentSingle- mode waveguides.
Abstract: Tunable Fano-like resonances are demonstrated numerically in a single Fabry-Perot resonator made of a bent single-mode waveguide. The resonances are shown to arise from the strong coupling between the fundamental mode of the core and a whispering gallery mode of the cladding. The tuning is realized by changing the bend radius of the waveguide. The influence of all major parameters of the resonator on its transmission and reflection spectra is illustrated and discussed. We believe that the presented results open up a new degree of freedom in designing bent waveguide-based refractometers, as well as other photonics elements utilizing cladding modes in bent single-mode waveguides.
9 citations
TL;DR: In this article, the authors demonstrate curved modifications with lengths of up to 2 mm within borosilicate glass produced by single 1030 nm picosecond laser shots with an Airy beam profile.
Abstract: We demonstrate curved modifications with lengths of up to 2 mm within borosilicate glass produced by single 1030 nm picosecond laser shots with an Airy beam profile. Plasma ignition in the side lobes of the beam as well as surface damage prove to be the crucial limitations for confined bulk energy deposition on a curved trajectory. A combined experimental and numerical analysis reveals optimum laser parameters for confined bulk energy deposition. This way we achieved single pass cutting of a 525 $\mu$m thick glass sheet with a well defined convex edge down to a bending radius of 774 $\mu$m.
9 citations
TL;DR: A numerical degradation model based on two key-functions, the so-called selection and breakage functions, is developed and implemented into a coupled DEM-CFD approach for investigating wood pellet degradation and fines formation during pneumatic conveying by particle-wall impact as discussed by the authors.
9 citations
TL;DR: In this paper, a thin polymer tube is first drawn and then a silver layer is formed on the outside of the tube, which can be easily obtained with high accuracy in the thickness.
Abstract: To develop a thin and flexible hollow waveguide for terahertz (THz) waves that can be applied to endoscopic applications, a new (to our knowledge) fabrication method is proposed in which thin polymer tubing is first drawn and then a silver layer is formed on the outside of the tubing. By using this method, a thick dielectric layer, which was difficult to form by liquid-phase deposition, is easily obtained with high accuracy in the thickness. A transmission loss at 1.5 THz measured by a Fourier transform IR spectrometer was 3.0 dB for a 50 cm long, 1 mm inner-diameter waveguide. It is shown that the transmission losses are not affected by the bending of the waveguide when the bending radius is larger than around 10 cm.
9 citations
Patent•
01 Feb 1979
TL;DR: The tube bending machine has a rotating form block (16) which determines the bending radius and a clamp jaw (19) locates the tube end against the straight side (38) on the form block so that it retains it's relative angular position.
Abstract: The tube bending machine has a rotating form block (16) which determines the bending radius. A clamp jaw (19) locates the tube end against the straight side (38) on the form block (16) so that it retains it's relative angular position. When two tubes (15a, 15b), inside each other are being bent, around support core (30) is placed inside the inner tube, and a C-shaped core (31) fills the space between the inner and the outer tube. Both cores are attached to an outside movable anchor block (26) by two parallel rods (34, 35) of reduced dia. During bending, the supporting cores move relative to the tubes.
9 citations