LEDFree surface LensElliptical reflectorTo improve the efficiency of fiber coupling with white LED, According the fiber coupling condition, based on the optical expansion in non-imaging optics theory. Designing two coupled systems of free surface lens and elliptical reflector. Then, the coupled system...
Based on the theory of optical fiber coupling and Fabry_Perot interference, a theoretical model of extrinsic Fabry_Perot interferometric (EFPI) optical fiber sensor was demonstrated, a formula which was used to measure absolute displacement through spectrum was attained. The structure of the optical ...
Supercontinuum (SC) generation has become a scientific and commercial success story in the past decade driven by specialty optical fiber technology, in particular the invention of the photonic crystal fiber (PCF). From optical frequency metrology to biophotonic imaging—its unique spectral properties hav...
In recent years, photocatalysis technology, which involves the application of solar energy for environmental remediation and energy conversion, has attracted widespread attention due to its low energy consumption, high efficiency, and lack of secondary pollution1,2,3. However, the nanostructured ...
Due to coupling of radiation modes, undesirable side lobes of the grating can also be created at shorter wavelengths; however, this can be controlled with more recently developed types of fiber and grating writing techniques. For example, a grating stronger than 30 dB can be written in a few...
A more efficient solution to compensate a large amount of chromatic dispersion has come from fiber Bragg grating (FBG) technology [1]. The improvement in the FBG fabrication processes has made possible the writing of accurate chirped patterns in fiber gratings. This chirping provides a wavelength-...
Consequently, establishing the appropriate spot size becomes critical for expanding the number of WSS ports and has emerged as a vital research focus for advanced port WSS technology. Figure 1. Schematic of WSS structure [1,2]. In order to enhance the transmission efficiency and performance of ...
Natural fiber (NF) is one of the many resources that nature has provided. NFs decompose quickly and are biodegradable, renewable, and cost-effective. It may be scavenged from a variety of plant and animal sources. They are employed as reinforcing materia
Nevertheless, the concept of shaped fiber tips has already been known as microlensed fibers for the past 40 years. Initially, microlensed fibers were extensively exploited to improve the coupling between light sources and optical fibers [32,33,34,35,36]. Microlensed fibers are also used in ...
Figure 1. Schematic of the proposed fiber-optic sensing system for measuring local air volume fractions in bubbly flows: (a) light reflection at the probe tip and (b) experimental setup. The emitted optical signal is divided into two beams by the 2×22×2 coupler with a nominal coupling ra...