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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Abstract: We proposed a mode splitter based on directional coupler (DC), which is capable of splitting the TE0 & TE1 modes without changing the mode order. It is found that high coupling efficiency (>;1 dB), low mode crosstalk (<;16 dB), wide bandwidth (~100 nm) and large fabrication tolerance (±10 nm) can be obtained by a 24.4 μm coupling length DC structure, which is composed of a strip and a slot silicon waveguide. This design represents a first step towards mode splitter without changing the mode order, which can find important potential applications, such as optical isolation and mode division multiplexing (MDM), in large scale photonic integrated circuits (PICs). © 1989;2012 IEEE.
17 citations
TL;DR: In this article, the authors propose a mode division multiplex communication technique that can split a specific spatial mode in light from a spatial mode multiplexed in an optical fiber by fusion of a phase conjugation technique with spatial filtering processing by multiple-ed volume holograms and random diffusers.
Abstract: We propose mode division multiplex communication technique that can split a specific spatial mode in light from a spatial mode multiplexed in an optical fiber by fusion of a phase conjugation technique with spatial filtering processing by multiplexed volume holograms and random diffusers. In mode division multiplexing, the optical signal outgoing from the multimode optical fiber is in a condition that optical inform ation of plural spatial modes is overlapped, therefore it is difficult to de-multiplex electrically after light detection. Our technique enables to split it into each mode all optically and to compensate temporal modal shift dynamically. Mode de-multiplexing is realized by multiplexed holographic arithmetic device and phase matching of a wave surface for the spatial mode orthogonal to time. Therefore, if we use indices in conventional electronic processing, a very high-speed operation equivalent to that of 10-100PFLOPS can be realized without causing any delay in light information to be transmitted. Moreover, it can realize constructions of a system that can dynamically respond to temporal mode variations and distortions with fiber transmissions by using a photorefractive medium. Separating of around 60-70% was ach ieved in an experiment of separating three multiplexed spatial modes by controlling a volume type dynamic reconfigurable device based on LiNbO
17 citations
Patent•
28 May 2003
TL;DR: In this paper, a method of mode selective coupling or mode multiplexing between integrated multimode (600) and single mode (602) waveguides is proposed. But it is not suitable for single-input single-out (SISO) applications.
Abstract: A method of mode selective coupling or mode multiplexing between integrated multimode (600) and single mode (602) waveguides. Evanescent coupling and tapering is used so that the signal may be transferred adiabatically from a first region of a first waveguide to a second, proximal, region of a second waveguide.
17 citations
Patent•
24 Apr 2007TL;DR: In this article, a higher-order mode dispersion compensating fiber was proposed, which attenuates a lower order mode propagating through the optical fiber while not attenuating a higher order mode which is higher than the lower order modes.
Abstract: A higher order mode dispersion compensating fiber includes an optical fiber and a first loss layer which is provided within the fiber and which attenuates a lower order mode propagating through the optical fiber while not attenuating a higher order mode which is higher than the lower order mode. A dispersion compensating fiber mode converter for a higher order fiber includes a single mode fiber; a higher order mode dispersion compensating fiber; and a fused and extended portion which has been formed by fusing and extending the single mode fiber and the higher order mode fiber. The fused and extended portion converts between the LP01 mode of the single mode fiber and the LP02 mode of the higher order mode dispersion compensating fiber.
17 citations
TL;DR: In this paper, a novel mode converter which is realized by mode coupling between a large core and a small core in an asymmetric dual-core photonic crystal fiber is proposed, where the mode indexes of the individual cores are index matched to produce effective mode coupling.
Abstract: A novel mode converter which is realized by mode coupling between a large core and a small core in an asymmetric dual-core photonic crystal fibre is proposed in this paper. The mode indexes of the individual cores are index matched to produce effective mode coupling. Numerical investigations demonstrate that an LP01 to LP02 mode converter with a bandwidth of 14 nm for the loss of 1 dB and polarization-dependent loss lower than 0.14 dB can be realized in a fibre with a length of 12.7 mm.
17 citations