Topic
Equilibrium mode distribution
About: Equilibrium mode distribution is a research topic. Over the lifetime, 928 publications have been published within this topic receiving 14939 citations.
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01 Aug 2010
TL;DR: In this article, the propagation properties of light in a disordered waveguide system composed of randomly different cores in size are presented by numerically solving the coupled mode equation and the propagation constants of the modes are assumed to be a random variable.
Abstract: The propagation properties of light in a disordered waveguide system composed of randomly different cores in size are presented by numerically solving the coupled mode equation. The propagation constants of the modes are assumed to be a random variable. When one of cores is illuminated at the input end of the waveguide system the coherent part of the amplitude of light decreases exponentially with increasing distance and at large distance only the incoherent part propagates. The incoherent part is concentrated into a narrow region near the illuminated core in the cross section of the waveguide system and the distribution does not almost change along the waveguide axis.
09 Nov 2000
TL;DR: In this article, a new type of mode converter using a tapered hollow silica optical fiber is proposed and experimentally demonstrated and three segments of single mode, hollow, and multimode fibers were concatenated serially to convert the fundamental LP 0 1 mode to TE 0 1, TM 0 1 and LP 0 2 modes.
Abstract: A new type of mode converter using a tapered hollow silica optical fiber is proposed and experimentally demonstrated. Three segments of single mode, hollow, and multimode fibers were concatenated serially to convert the fundamental mode to a ring shape mode. The proposed scheme could be applied to convert the fundamental LP 0 1 mode to TE 0 1 , TM 0 1 and LP 0 2 modes. Evolution of mode filed along the taper and the insertion loss were measured.
01 Mar 2017
TL;DR: In this paper, the electromagnetic wave propagation phenomena in the miter bend were numerically simulated and the proportions of the higher-order mode in the propagation mode were identified from electromagnetic distribution using the mode expansion technique.
Abstract: The electromagnetic wave propagation phenomena in the miter bend are numerically simulated. In addition, the proportions of the higher-order mode in the propagation mode are identified from electromagnetic distribution using the mode expansion technique. The mode expansion results show that the fundamental mode proportion in the propagation mode is 90 % with each pass in the miter bend, and the remaining 10 % is converted into the higher-order modes. Moreover, the error distribution is evaluated by comparing the simulation distribution and the distribution that is reproduced by the summation of the theoretical distributions of higher-order mode in response to the proportion in the propagation mode. From the above error distribution, we can see that the mode expansion results are in good agreement with simulation result in around the waveguide center.
01 Jan 1999
TL;DR: In this paper, a simple tapered directional coupler with a five-layered structure is employed for mode conversion between a single-order and higher-order modes, and the first several modes in the tapered waveguide shift to single order mode with high conversion efficiency by use of computer simulation, and observed the streak patterns of mode propagation experimentally.
Abstract: A simple tapered directional coupler with a five-layered structure is employed for mode conversion between a single-order and higher-order modes. As a result, we confirmed that the first several modes in the tapered waveguide shift to single-order mode with high conversion efficiency by use of computer simulation, and observed the streak patterns of mode propagation experimentally.
Posted Content•
TL;DR: In this article, the authors proposed a design for broadband waveguide mode conversion based on gradient index metamaterials (GIMs), which achieved asymmetric propagation by integrating zero-index metammaterials inside the GIM waveguide.
Abstract: We propose a design for broadband waveguide mode conversion based on gradient index metamaterials (GIMs). Numerical simulations demonstrate that the zeroth order of transverse magnetic mode or the first order of transverse electric mode (TM0/TE1) can be converted into the first order of transverse magnetic mode or the second order of transverse electric mode (TM1/TE2) for a broadband of frequencies. As an application, an asymmetric propagation is achieved by integrating zero index metamaterials inside the GIM waveguide.