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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TL;DR: In this article, the authors describe the elimination of undesired mode suppression in a multiple-device cylindrical cavity combiner caused by the effect of excitation of the desired power-combining mode due to external signal injection.
Abstract: This paper describes the elimination of undesired mode suppression in a multiple-device cylindrical cavity combiner caused by the effect of excitation of the desired power-combining mode due to external signal injection. Mode analysis is carried out to derive the condition of undesired mode suppression and of sustaining the desired mode oscillation and to prove the capability of perfect combining of the output powers of the multiple-device structure and the power of injected signal. Experiments with TM020-mode cavity confirmed the theory.
26 Apr 1989
TL;DR: In this article, the authors used an Automated Mode Analyzer (AMA) for the characterization of devices based on modal power redistribution (MPR) for sensing and modulating applications.
Abstract: Characteristics of light, such as intensity, phase, polarization, and wavelength have been exploited for fiber optic devices. Recently, use of the modal characteristic of light in a multimode fiber was demonstrated for sensing and modulating applications. Initial studies, using an Automated Mode Analyzer (AMA), a specially developed experimental system designed for the characterization of devices based on modal power redistribution (MPR), is reported.
01 Aug 2015
TL;DR: In this paper, a ring resonator structure for optical mode conversion for mode division multiplexing was proposed, which converted 0th mode to 1st mode with just 1.08 dB conversion loss.
Abstract: We present a novel ring resonator structure for optical mode conversion for mode division multiplexing. The proposed micro structure (<15×15 μm2) converts 0th mode to 1st mode with just 1.08 dB conversion loss (λ =1.55 μm, TE-mode).
06 Apr 2017
TL;DR: In this paper, physical effects caused by macro-and micro bends of optical fiber including additional modedependent loss, mode coupling and spurious mode excitation in fiber MDM-system are considered.
Abstract: In this paper physical effects caused by macro- and micro bends of optical fiber including additional mode-dependent loss, mode coupling and spurious mode excitation in fiber MDM-system are considered. The effects described below can dramatically decrease capacity and maximum data rate in such systems because of inevitability of fiber bends due to system exploitation thus making MDM-system commercialization much more difficult and expensive. Mathematical approach used to describe these effects and applied in the simulation model is based on well- known refractive index profile approximation [1] of bent step-index fibers and mathematical field coupling model [8].
TL;DR: In this article , a high-order mode fiber laser based on few-mode fiber gratings is proposed and experimentally demonstrated, which can be applied to optical communication systems based on WDM.
Abstract: We propose and experimentally demonstrate a high-order mode fiber laser based on few-mode fiber gratings. The fiber laser has the structure of three sub-ring-cavities. LP01 mode, LP11 mode and LP21 mode can be obtained by different few-mode long-period fiber gratings. The reflection of LP01 mode, LP11 mode and LP21 mode can be realized by different few-mode fiber Bragg gratings. Therefore, the simultaneous lasing of LP01 mode, LP11 mode and LP21 mode at the same wavelength can be achieved. A few-mode fiber Bragg grating functions as a discrete filter. By adjusting a polarization controller, switchable output among single-, dual- and triple-wavelength lasing can be realized, and three wavelengths correspond to LP01 mode, the mixing of LP01 mode and LP11 mode, and LP11 mode. Therefore, the simultaneous lasing of different modes at the same wavelength, and the simultaneous lasing of different modes at different wavelengths can be achieved in this fiber laser, which can be applied to optical communication systems based on mode-division multiplexing-wavelength-division multiplexing.