DPSK Signals Demodulation Based on a Graded-index Multimode Fiber Mismatch Spliced between Two Single-mode Fibers

A single mode fiber assembled with a specified length graded index multimode fiber as a collimator, which is used in common-path optical coherence tomography (CPOCT) is described in this paper. Compared with conventional collimator lens, this assembled fibers structure possesses the advantages of small volume, easy to be fused or connected with other part of the CPOCT system. Furthermore, with this assembled structure an all fiber CPOCT system is constructed which has the potential to detect the internal bodily organs and tissues of human being. Numerical simulation and experiments are implemented to verify the effectiveness of this method.

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Expanded single-mode fiber using graded index multimode fiber

Optical Engineering ◽

10.1117/1.1689335 ◽

2004 ◽

Vol 43 (7) ◽

pp. 1634 ◽

Cited By ~ 7

Author(s):

C. Kaczmarek

Keyword(s):

Single Mode ◽

Single Mode Fiber ◽

Multimode Fiber ◽

Graded Index

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Novel Single Mode Fiber Lens Coupler for Laser¿Diodes Based on Long Period Gratings in a Hybrid Graded-Index Multimode Fiber

2006 IEEE LEOS Annual Meeting Conference Proceedings ◽

10.1109/leos.2006.279134 ◽

2006 ◽

Author(s):

Galina Nemova ◽

Raman Kashyap

Keyword(s):

Laser Diodes ◽

Single Mode ◽

Single Mode Fiber ◽

Multimode Fiber ◽

Graded Index ◽

Long Period ◽

Long Period Gratings

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Conditions for walk-off soliton generation in a multimode fiber

Communications Physics ◽

10.1038/s42005-021-00687-0 ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

Mario Zitelli ◽

Fabio Mangini ◽

Mario Ferraro ◽

Oleg Sidelnikov ◽

Stefan Wabnitz

Keyword(s):

Numerical Simulations ◽

Fundamental Mode ◽

Single Mode ◽

Multimode Fiber ◽

Graded Index ◽

Coupling Conditions ◽

Degenerate Modes ◽

Soliton Generation

AbstractIt has been recently demonstrated that multimode solitons are unstable objects which evolve, in the range of hundreds of nonlinearity lengths, into stable single-mode solitons carried by the fundamental mode. We show experimentally and by numerical simulations that femtosecond multimode solitons composed by non-degenerate modes have unique properties: when propagating in graded-index fibers, their pulsewidth and energy do not depend on the input pulsewidth, but only on input coupling conditions and linear dispersive properties of the fiber, hence on their wavelength. Because of these properties, spatiotemporal solitons composed by non-degenerate modes with pulsewidths longer than a few hundreds of femtoseconds cannot be generated in graded-index fibers.

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Solving the mystery of the walk-off soliton

10.21203/rs.3.rs-358197/v1 ◽

2021 ◽

Author(s):

Mario Zitelli ◽

Fabio Mangini ◽

Mario Ferraro ◽

Oleg Sidelnikov ◽

Stefan Wabnitz

Keyword(s):

Input Pulse ◽

Ultrashort Pulses ◽

Single Mode ◽

High Energy ◽

Multimode Fiber ◽

Variational Theory ◽

Multimode Fibers ◽

Graded Index ◽

Optical Modes ◽

Energy Laser

Abstract Pioneering works on multimode fiber transmission [1,2], dated 40 years ago, predicted the existence of multimode solitons, providing conditions for the temporal trapping of the input optical modes to form a spatiotemporal soliton [3-5]. Only recently [6-8], multimode solitons were experimentally investigated in graded-index multimode fibers (GRIN), unveiling the complexity of a new, uncharted field. In our work, we experimentally and numerically investigated the propagation of ultrashort pulses over long distances of GRIN fiber. We discovered a new class of spatiotemporal solitons with surprising properties: basically single-mode, they cannot be described by the variational theory; their pulsewidth and energy are independent of the input pulse duration, and appear to depend only on the fiber dispersive parameters and, therefore, the wavelength. The new solitons are promising for the delivery of high-energy laser beams, for high-power spatiotemporal mode-locked multimode fiber lasers, and for high-bit rate multimode fiber networks.

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1 Gbit/s full-duplex bidirectional optical data transmission over 500 m of 50 μm-core graded-index multimode fiber with novel monolithically integrated transceiver

33rd European Conference and Exhibition on Optical Communication - ECOC 2007 ◽

10.1049/ic:20070440 ◽

2007 ◽

Author(s):

M. Stach ◽

F. Rinaldi ◽

D. Wahl ◽

D. Rimpf ◽

S. Lorch ◽

...

Keyword(s):

Data Transmission ◽

Full Duplex ◽

Optical Data ◽

Multimode Fiber ◽

Monolithically Integrated ◽

Graded Index

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A Simple Method for Prediction of Effective Core Area and Index of Refraction of Single-mode Graded Index Fiber in the Low V Region

Journal of Optical Communications ◽

10.1515/joc-2014-0020 ◽

2014 ◽

Vol 35 (4) ◽

Author(s):

Angshuman Majumdar ◽

Satabdi Das ◽

Sankar Gangopadhyay

Keyword(s):

Refractive Index ◽

Single Mode ◽

Index Of Refraction ◽

Core Area ◽

Exact Results ◽

Simple Method ◽

Graded Index ◽

Core Areas ◽

V Region ◽

User Friendly

AbstractBased on the simple power series formulation of fundamental mode developed by Chebyshev formalism in the low V region, we prescribe analytical expression for effective core area of graded index fiber. Taking step and parabolic index fibers as examples, we estimate the effective core areas as well as effective refractive index for different normalized frequencies (V number) having low values. We also show that our estimations match excellently with the available exact results. The concerned predictions by our method require little computation. Thus, this simple but accurate formalism will be user friendly for the system engineers.

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