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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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Journal ArticleDOI
TL;DR: Fiber Bragg gratings are written across all 120 single-mode cores of a multi-core optical Fiber, resulting in a compact multimode "photonic lantern" filter with astrophotonic applications.
Abstract: Fiber Bragg gratings are written across all 120 single-mode cores of a multi-core optical Fiber. The Fiber is interfaced to multimode ports by tapering it within a depressed-index glass jacket. The result is a compact multimode "photonic lantern" filter with astrophotonic applications. The tapered structure is also an effective mode scrambler.

111 citations

PatentDOI
08 Sep 1995
TL;DR: In this paper, the first all-mode, wave optics calculations of the reflectivity of Bragg gratings in highly multimode optical fibers are presented, including the effects of individual mode power changes due to microbending transducer loss upstream from the grating.
Abstract: New sensing and diagnostic methods are implemented with multimode fiber Bragg gratings (MMFBG) and methods for sensor addressing and multiplexing are described. Real time structural strain and vibration monitoring using optical time domain reflectometry (OTDR) is discussed. The first all-mode, wave optics calculations of the reflectivity of Bragg gratings in highly multimode optical fibers are presented, including the effects of individual mode power changes due to microbending transducer loss upstream from the grating. Two categories of multimode fiber gratings are possible, independent mode and mode coupling, and the fabrication differences between these types of gratings are described. The reflectivity properties of independent mode multimode fiber gratings are examined and compared to single mode fiber gratings. In particular, multimode fiber gratings offer added flexibility in grating design and performance characteristics compared to single mode fiber gratings, because the reflectivity response may be tuned by the spatial periodicity, length, core size, numerical aperture, and mode coupling characteristics of the grating.

103 citations

Journal ArticleDOI
TL;DR: This paper demonstrates successful transmission of 107-Gb/s dual-mode and dual-polarization coherent optical orthogonal frequency-division multiplexing (CO-OFDM) over a 4.5-km two-mode fiber.
Abstract: In addition to the dimensions of time, frequency, complex constellation, and polarization, spatial mode can be the fifth dimension to be explored for modulation and multiplexing in optical fiber communications. In this paper, we demonstrate successful transmission of 107-Gb/s dual-mode and dual-polarization coherent optical orthogonal frequency-division multiplexing (CO-OFDM) over a 4.5-km two-mode fiber. A mechanically-induced LP01/LP11 mode converter is used as the mode selective element in a spatial-mode multiplexed system.

102 citations

Journal ArticleDOI
TL;DR: In this paper, a procedure for the multiplexing and demultiplexing of modes in optical fibers with digital holograms is presented, where a spatial light modulator (SLM) is used to encode a digital hologram, and the desired complex field is shaped and injected into the fiber.
Abstract: A procedure for the multiplexing and demultiplexing of modes in optical fibers with digital holograms is presented. By using a spatial light modulator (SLM) to encode a digital hologram, the desired complex field is shaped and injected into the fiber. The SLM's ability to rapidly refresh the encoded transmission function enables one to excite pure single modes, as well as arbitrary coherent mode superpositions, in real-time. The modes from the output of the fiber are subsequently demultipexed by applying a correlation filter for modal decomposition, thus allowing for an all-digital-hologram approach to modal analysis of fibers. The working principle is tested using conventional step-index large mode area fibers being excited with higher-order single modes and superpositions.

99 citations

Patent
24 Mar 2000
TL;DR: Coupling devices for coupling a lens (8, 30, 72, 96) to a single mode optical fiber (4, 104, 144, 184) are disclosed in this paper.
Abstract: Coupling devices (90, 140) for coupling a lens (8, 30, 72, 96) to a single mode optical fiber (4, 104, 144, 184) are disclosed. The lens assembly is the coupling device and includes a single mode optical fiber (4, 104, 144, 184), a lens (8, 30, 72, 96), and a locating tube (6, 114, 182).

91 citations


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