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Mode scrambler

About: Mode scrambler is a research topic. Over the lifetime, 896 publications have been published within this topic receiving 13595 citations.


Papers
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Proceedings ArticleDOI
TL;DR: In this paper, the authors present the fabrication of optical mode field adaptors for fiber optical communications devices in combination with a new method for spot size measurement for single mode optical components.
Abstract: In this paper we present the fabrication of optical mode field adaptors for fiber optical communications devices in combination with a new method for spot size measurement for single mode optical components. At the end of standard single mode fibers we have manufactured reproducible mode field transformers with diameters from 5 μm to 90 μm. Additionally, we present a new planar optical field characterization method. BPM simulations are performed to predict the spot sizes at different fiber end diameters. Based on the measurement of a singlemode fiber in accordance with ITU Recommendation G.652 the efficiency is demonstrated and discussed.

5 citations

Patent
06 Jul 2000
TL;DR: In this paper, the authors proposed a mode-coupled laser for ultra-short optical pulses, which consists of a multi-mode fiber, a mode coupler and an optical guide.
Abstract: An ultra-short optical pulse laser comprises a multi mode fiber (13), a mode coupler (35) and an optical guide (15) positioned on a resonator axis (23), the guide restricting amplified light to the fundamental mode of the fiber. A laser, for generating ultra-short optical pulses, comprises a laser resonator (11) through which light energy repeatedly passes along the resonator axis (23), an optical multi mode fiber portion (13) doped with an amplification material and positioned along the resonator axis, a pump system (51) for exciting the amplification material, a mode coupler (35) positioned on the resonator axis and an optical guide element (15) which is positioned on the resonator axis and which restricts light, amplified by the fiber, to the fundamental mode of the fiber. Independent claims are also included for the following: (i) a method of generating ultra-short pulses using the above laser; and (ii) a mode-coupled laser for generating high power ultra-short optical pulses.

5 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present an analysis of conditioned launch in a gradient-index multimode fiber (MMF) and show that about 40% of modes, only high-order modes, are excited in the MMF.
Abstract: We present an analysis of conditioned launch in a gradient- index multimode fiber (MMF). Selective mode excitation is obtained by nonaxial evanescent coupling between two highly asymmetric side- polished fibers: a single-mode fiber and an MMF with an exposed core. An index-matching slab improves the coupling efficiency and selectivity. The simulation shows that about 40% of modes, only high-order modes, are excited in the MMF. When compared to an overfilled launch, the bandwidth of a perturbed index fiber is enhanced more than twofold for large parameter variations.

5 citations

Journal ArticleDOI
TL;DR: By taking local gain into consideration, the general coupled mode equations in multimode active fiber are deduced in the model and the effect of various factors can be analyzed based on the general coupling mode equations.
Abstract: General analysis of the mode interaction in multimode fiber is presented in this paper. By taking local gain into consideration, the general coupled mode equations in multimode active fiber are deduced in the model and the effect of various factors can be analyzed based on the general coupled mode equations. Analytical expression of the beam quality factor is deduced for the optical field emerging from the multimode active fiber. The evolution of the mode power and M2 factor along the fiber are analyzed by numerical evaluations.

5 citations

Journal ArticleDOI
TL;DR: In this paper, a novel method to generate higher order modes in the frequency range of millimeter and submillimeter wave regime was proposed, which uses magnetic coupling scheme between waveguide fundamental mode and a cavity mode.
Abstract: We report on a novel method to generate higher order modes in the frequency range of millimeter and submillimeter wave regime. The method uses magnetic coupling scheme between waveguide fundamental mode and a cavity mode. A TE62 mode at W-band was considered for design using the proposed scheme. The suggested method simplifies a mode generator design allowing direct feeding via a standard fundamental waveguide and also provides a compact mode generator to design extremely higher order mode in a cavity. In addition, it opens a new and novel way to develop high power high gain gyrotron amplifiers at millimeter and submillimeter wave regime. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1648–1651, 2014

5 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20234
202220
20213
20202
20196
20186