Results 161 to 170 of about 4,096,125 (206)

Detailed Investigation of Mode-Field Adapters Utilizing Multimode-Interference in Graded Index Fibers

Journal of Lightwave Technology, 2012
We present a detailed study of mode-field adapters (MFA) based on multimode interference in graded index multimode fibers. We have fabricated and characterized MFAs from a selection of commercially available single-mode and graded index fibers.
Arash Mafi, Axel Schülzgen, A Schülzgen   +2 more
exaly   +3 more sources

Low-cost high-sensitivity strain and temperature sensing using graded-index multimode fibers [PDF]

Applied Optics, 2007
We report a low-loss, low-cost high-sensitivity all-fiber strain and temperature sensor based on mode interference in graded-index multimode fibers. Blueshifts with strain and temperature sensitivities of 18.6 pm/microstrain and 58.5 pm/°C have been ...
Liu, Yu, Wei, Li
exaly   +2 more sources

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Multimode Fibers for Compensating Intermodal Dispersion of Graded-Index Multimode Fibers

Journal of Lightwave Technology, 2004
This paper proposes a novel type of multimode dispersion compensation fiber (MM-DCF) by which the intermodal dispersion of multimode fibers (MMFs) can be effectively compensated. A theoretical model that precisely calculates the group velocities of a target MMF and its MM-DCF and the power coupling between the two fibers is applied to confirm the ...
N. Guan, K. Takenaga, S. Matsuo, K. Himeno   +3 more
openaire   +1 more source

Optical OAM tweezer based on graded-index multimode fibers

Applied Optics, 2021
A fiber-optic probe consisting of a section of graded-index multimode fiber (GIMF) fused onto a few-mode fiber (FMF) is proposed in this paper. The orbital angular momentum (OAM) mode guided by the FMF was launched into the GIMF, and a focused OAM beam profile was obtained by tailoring the length of the GIMF.
Wenxu Ren, Yandong Gong, Zhuo Zhang, Ke Li   +3 more
openaire   +2 more sources

Second harmonic generation in multimode graded-index fibers: spatial beam cleaning and multiple harmonic sideband generation

Optics Letters, 2017
We study experimentally and numerically the spectral and spatial dynamics of second harmonic generation in an alloptically poledmultimode graded-index fiber.
Daniele Modotto, Katarzyna Krupa, Vincent Couderc   +2 more
exaly   +2 more sources

Principal Modes in Graded-Index Multimode Fibers

Frontiers in Optics 2009/Laser Science XXV/Fall 2009 OSA Optics & Photonics Technical Digest, 2009
We model multimode propagation, including spatial- and polarization-mode coupling. At low coupling, the impulse response is polarization-dependent; differential mode delays (DMDs) scale linearly with length. At high coupling, DMDs scale as the square-root of length.
Mahdieh B. Shemirani, Joseph M. Kahn
openaire   +1 more source

Profile inhomogeneity in multimode graded-index fibers

Journal of Lightwave Technology, 1989
Profile parameters (g) of several multimode graded-index fibers have been measured. It was found that g may vary azimuthally by +or-0.15 or more in fibers for which the average value is between 1.8 and 2.2. >
C.W. Oates, M. Young
openaire   +1 more source

Modal dispersion in multimode graded-index fibers

Applied Optics, 1975
A complete analysis of the propagation characteristics of a ray through an axially symmetric graded-index medium is carried out in the geometrical optics approximation. First, two constants of the motion are shown to exist for a ray propagating in an infinite medium.
openaire   +2 more sources

Mode group division multiplexing in graded-index multimode fibers

Bell Labs Technical Journal, 2013
Data transmission over multimode fibers has the potential to considerably increase the capacity limit of single-mode fibers by exploiting the spatial dimension. For long-haul systems, mode division multiplexing using one mode per channel in a few-mode fiber requires coherent detection in conjunction with digital multiple input multiple output (MIMO ...
Bernd Franz, Henning Bülow
openaire   +1 more source

Microbend-induced mode coupling in a graded-index multimode fiber

Applied Optics, 2005
We present a theoretical analysis of the mode coupling effects at a microbend along a graded-index (GI) multimode fiber (MMF). By matching the incident and excited mode fields at the microbend, we obtain the coupling coefficients among the guided modes at different microbending conditions.
Lei, Su, Kin Seng, Chiang, Chao, Lu
openaire   +2 more sources