Cladding (fiber optics)

About: Cladding (fiber optics) is a research topic. Over the lifetime, 29566 publications have been published within this topic receiving 325458 citations.

Infrared optical fiber

Abstract: An optical fiber for infrared transmission constructed by winding a cladding around a core in the manner of a coil, the cladding having a refractive index lower than that of the core, a protective tube being employed to jacket the clad core.

Refractive Index Sensor Based on Microstructured

Abstract: In this work, an all-fiber high-resolution refractive index sensor based on a microstructured fiber Bragg grating is presented. The proposed structure relies on a partial and localized etching of the cladding layer along a standard grating. The main spectral changes of the structured grating are the increasing of the stopband and the formation of a narrow allowed band strongly dependent on the etching features and the surrounding refractive index. A sensor prototype has been fabricated by using wet etching and a proper masking procedure; experimental results reveal the possibility to carry out low-cost refractive index measurements with a resolution of . Index Terms—Fiber Bragg gratings (FBGs), microstructured photonic devices, refractive index measurements.

Large-core-area hollow photonic-crystal fibers

Abstract: We demonstrate hollow-core photonic-crystal fibers (PCFs) with a core diameter of 45 μm and a period of the photonic-crystal cladding of 7 μm. These fibers are shown to allow a waveguide delivery of 4-mJ 15-ns pulses of 1.06-μm radiation of a Q-switched Nd: YAG laser. Hollow PCFs reported in this work help to bridge the gap between standard, solid-cladding hollow fibers and hollow PCFs in terms of effective guided-mode areas, offering attractive solutions for high-field physics, laser technologies, and ultrafast photonics.

Experiment apparatus for performance evaluation of nuclear fuel cladding pipe under LOCA simulation working condition

Abstract: The present invention relates to an experiment apparatus for the performance evaluation of a nuclear fuel cladding pipe under an LOCA simulation working condition. The experiment apparatus comprises a molding cavity separated into an upper portion vacuum chamber and a lower portion quenching chamber through a sealing member, a heating device, a water vapor circulating device, a cooling device and a control system, wherein the control system comprises a first control unit for controlling a vacuumizing pump to vacuumize, a second control unit for controlling a liquid feeding unit to inject a cooling liquid, and a detecting and monitoring unit respectively for detecting and monitoring the pressure change in the vacuum chamber and the quenching chamber, and when the detecting and monitoring unit displays that the pressure in the vacuum chamber or quenching chamber decreases, the nuclear fuel cladding pipe is damaged so as to fail. According to the present invention, the design of the apparatus is delicate and reasonable, can well simulate the performance evaluation of the nuclear fuel cladding pipe under the LOCA working condition, and further has characteristics of simple structure, easy operation, and low cost.

Cusp illuminator and flat panel illuminator made thereby

Abstract: A light reflector apparatus using an illumination optical fiber to produce a uniform illumination pattern is disclosed. By controlling the propagation of light in the core and cladding regions of an optical fiber, uniform light emission along the length of the fiber can be achieved. Using the illumination fiber as a light source in an open cusp reflector assembly provides for uniform dispersion of the emitted light over the exit faces of the reflector.