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, a segment of long-period fiber grating (LPFG) was proposed to selectively filter the fundamental mode in the few-mode optical fiber by applying an appropriate chosen surrounding material and an apodized configuration of LPFG, high fundamental mode loss and low high order core mode loss can be achieved simultaneously.
13 citations
Patent•
25 Jan 2007TL;DR: Automatic mode determination for an input device is disclosed in this article, where the input device can transition from a first mode to a transition mode and/or a second mode depending on conditions of the input devices.
Abstract: Automatic mode determination for an input device is disclosed. Depending on conditions of the input device, the input device can transition from a first mode to a transition mode and/or a second mode.
13 citations
TL;DR: The results indicate that the mode conversion efficiency is affected by the waveguide length and the input pump light power, and the highest efficiency can reach upto 88% by considering the influence of optical and acoustic absorption losses in the hybrid waveguide.
Abstract: We propose a scheme for on-chip all optical mode conversion based on forward stimulated Brillouin scattering in a hybrid phononic-photonic waveguide. To describe the mode conversion the theoretical model of the FSBS is established by taking into account the radiation pressure and the electrostriction force simultaneously. The numerical simulation is carried out for the mode conversion from the fundamental mode E11x to the higher-order mode E21x. The results indicate that the mode conversion efficiency is affected by the waveguide length and the input pump light power, and the highest efficiency can reach upto 88% by considering the influence of optical and acoustic absorption losses in the hybrid waveguide. Additionally, the conversion bandwidth with approximate 12.5 THz can be achieved in 1550nm communication band. This mode converter on-chip is a promising device in the integrated optical systems, which can effectively increase the capacity of silicon data busses for on-chip optical interconnections.
13 citations
TL;DR: The coherent optical MIMO transmission of two 10 Gbit/s BPSK signals over 20 km of graded-index multi-mode fiber was successfully achieved by using a mode convergence unit that converges higher-order mode light into the fundamental mode while maintaining the phase and amplitude information of the higher- order mode.
Abstract: We describe a coherent optical MIMO transmission experiment that employs a digital coherent receiver with a mode convergence unit, which converges higher-order mode light into the fundamental mode while maintaining the phase and amplitude information of the higher-order mode. The coherent optical MIMO transmission of two 10 Gbit/s BPSK signals over 20 km of graded-index multi-mode fiber was successfully achieved by using this mode convergence unit. We also show numerically that multi channel signals for a coherent optical MIMO transmission can be recovered by employing sufficient mode diversity, even if mode conversion occurs in the transmission fiber.
13 citations
TL;DR: In this paper, the authors present a theoretical model describing the mode conversion in the etched fiber elements, and the fabrication and testing of the modal coupling elements and the experimental confirmation of the theoretical model are discussed.
Abstract: When a fiber with topological structures built directly on the cladding is compressed longitudinally, lateral bends are induced. The lateral bends lead to mode coupling. We have built several etched two-mode fiber modal coupling elements to take advantage of this effect of bending. The resulting modal coupling elements are compact. More importantly, the percentage of power converting from one mode to another is variable by varying the axial compression. In this paper, we present a theoretical model describing the mode conversion in the etched fiber elements. Also discussed are the fabrication and testing of the modal coupling elements and the experimental confirmation of the theoretical model.
13 citations