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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.


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Patent
26 Nov 2007
TL;DR: In this paper, an asymmetric coupler was used to provide a low insertion loss optical connection between laterally-coupled DFB laser operating in first order mode and passive waveguide operating in zero order optical mode.
Abstract: The invention describes method and apparatus for a mode converter enabling an adiabatic transfer of a higher order mode into a lower order optical mode within a photonic integrated circuit exploiting integrated semiconductor ridge waveguide techniques. As disclosed by the invention, such a mode conversion is achievable by using an asymmetric coupler methodology. In an exemplary embodiment of the invention, the invention is used to provide a low insertion loss optical connection between laterally-coupled DFB laser operating in first order mode and passive waveguide operating in the zero order optical mode. The integrated arrangement fabricated by using one-step epitaxial growth allows for a launch of the laser's light into the waveguide circuitry operating in the zero order lateral mode or efficiently coupling it to single-mode fiber, an otherwise high loss interface due to the difference in laser and optical fiber modes.

34 citations

Proceedings ArticleDOI
07 Mar 2000
TL;DR: In this article, a fused-type mode selective coupler that couples the LP11 mode of a twomode fiber and the LP01 mode of matching single-mode fiber is presented.
Abstract: We demonstrate a high performance fused-type mode selective coupler that couples the LP11 mode of a two-mode fiber and the LP01 mode of a matching single-mode fiber, the phase-matching condition was satisfied by etching and pre-pulling of a two-mode fiber, the excess loss and the maximum coupling ratio of 0.15 dB and 92%, respectively, are achieved.

33 citations

Journal ArticleDOI
Zhihai Liu1, Lei Wang1, Peibo Liang1, Yu Zhang1, Jun Yang1, Libo Yuan1 
TL;DR: This is the first demonstration of the trapping position adjustment without moving the fiber for single-fiber optical tweezers and makes possible more practical applications in biomedical research fields.
Abstract: We demonstrate trapped yeast cell axial-position adjustment without moving the optical fiber in a single-fiber optical trapping system. The dynamic axial-position adjustment is realized by controlling the power ratio of the fundamental mode beam (LP01) and the low-order mode beam (LP11) generated in a normal single-core fiber. In order to separate the trapping positions produced by the two mode beams, we fabricate a special fiber tapered tip with a selective two-step method. A yeast cell of 6 μm diameter is moved along the optical axis direction for a distance of ∼3 μm. To the best of our knowledge, this is the first demonstration of the trapping position adjustment without moving the fiber for single-fiber optical tweezers. The excitation and utilization of multimode beams in a single fiber constitutes a new development for single-fiber optical trapping and makes possible more practical applications in biomedical research fields.

33 citations

Patent
07 Nov 2005
TL;DR: In this article, a multi-mode optical fiber link is described, which includes a first spatial mode converter that is coupled to a first single mode optical fiber, and a second spatial mode converter that reduces a number of optical modes in the optical signal.
Abstract: A multi-mode optical fiber link is described. The multi-mode optical fiber link includes a first spatial mode converter that is coupled to a first single mode optical fiber. The first spatial mode converter conditions a modal profile of an optical signal propagating from the single mode optical fiber to the first spatial mode converter. A multi-mode optical fiber is coupled to the first spatial mode converter. A second spatial mode converter is coupled to an output of the multi-mode optical fiber and to a second single mode optical fiber. The second spatial mode converter reduces a number of optical modes in the optical signal. Both the first and the second spatial mode converters increase an effective modal bandwidth of the optical signal.

33 citations

Journal ArticleDOI
TL;DR: It is pointed out theoretically that fiber acousto-optic mode coupling can occur between the higher-order modes with adjacent azimuthal numbers and experimentally selective fiber mode conversion from LP01 to LP11, and then to LP21 or LP02 is demonstrated experimentally in a few-mode fiber by using a method of cascaded acoustosynthetic mode coupling.
Abstract: It is pointed out theoretically that fiber acousto-optic mode coupling can occur between the higher-order modes with adjacent azimuthal numbers. Selective fiber mode conversion from LP01 to LP11, and then to LP21 or LP02 is demonstrated experimentally in a few-mode fiber by using a method of cascaded acousto-optic mode coupling.

32 citations


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