Topic
Mode scrambler
About: Mode scrambler is a research topic. Over the lifetime, 896 publications have been published within this topic receiving 13595 citations.
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01 Jan 2023
TL;DR: In this article , a spatial-light mode-conversion method based on a liquid-crystal spatial light modulator (LC-SLM) was proposed to optimize the conversion-transfer function.
Abstract: In wireless laser communication systems, owing to the influence of atmospheric turbulence on the spatial-light mode, the beam mode degrades, which leads to incomplete matching with the mode field of the single-mode fiber used for coupling at the receiving end. This reduces the coupling efficiency of the spatial-light single-mode fiber. Therefore, it is particularly important to match the beam mode with the fiber mode. This chapter discusses a spatial-light mode-conversion method based on a liquid–crystal spatial-light modulator (LC-SLM), and optimizes the conversion-transfer function.
29 Apr 2013
TL;DR: This paper presents a multimode optical fiber design that has high tolerance to bending and it is observed that the proposed design is consistent with standard 50 μm graded index multimode fiber in terms of bandwidth and interconnectivity.
Abstract: This paper presents a multimode optical fiber design that has high tolerance to bending. Average bending loss per mode for a standard 50 µm graded index multimode fiber is 8.06E+08 dB/km for a bending radius of 1.25mm and particularly for fundamental mode it is 2.18E+02 dB/km. Whereas, simulation results show that average bending loss per mode in the case of the proposed bend insensitive multimode fiber for a bending radius of 1.25mm is about 2.67E-11 dB/km and particularly for the fundamental mode it is 1.96E-32 dB/km only. It is also observed that the proposed design is consistent with standard 50 µm graded index multimode fiber in terms of bandwidth and interconnectivity. Thus both can be spliced with the proposed design in the bending section.
01 Jun 2004
TL;DR: In this article, the physical meaning of coupling a two-photon field (non-classical state of light) into two single mode optical fibers was investigated, and the limits to this due to a non-coherent emission of photons in parametric down conversion, an important starting point for many single photon source schemes.
Abstract: The authors investigate the physical meaning of coupling a two-photon field (non-classical state of light) into two single mode optical fibers, studying the limits to this due to a non-coherent emission of photons in parametric down conversion, an important starting point for many single photon source schemes
10 Nov 1997
TL;DR: In this article, a single mode fiber is used as a point-like input beam source for a multi-mode fiber, and if two fibers are closely located and the multiamodal fiber is sufficiently long, the input beam from the singlemode fiber excites many modes of the multispectral fiber without power loss.
Abstract: Summary form only given. There have been many displacement sensing methods based on optical fibers such as using mode scrambling of multi-mode fibers or intensity change of single mode fibers due to coupling mismatch. In this work, we used as displacement sensing the mode excitation change caused by spatial variation of input beam. A single mode fiber is used as a point-like input beam source for a multi-mode fiber. Since the core size of the multi-mode fiber is about 10 times larger than that of the single mode fiber, if two fibers are closely located and the multi-mode fiber is sufficiently long, the input beam from the single mode fiber excites many modes of the multi-mode fiber without power loss.
09 Jun 2014
TL;DR: In this article, a liquid level sensor based on single leaky mode attenuation in a singlemode-multimode-singlemode (SMS) fiber structure is proposed and demonstrated, which aims at the liquid whose refractive index is higher than that of the silica fiber.
Abstract: A liquid level sensor based on single leaky mode attenuation in a single-mode-multimode-single-mode (SMS) fiber structure is proposed and demonstrated, which aims at the liquid whose refractive index is higher than that of the silica fiber. Its operating principle is investigated theoretically by using the mode expansion method, and a monotonic and linear sensing response is obtained. Experiments are then carried out to verify the theoretical analysis.