Mode multi/demultiplexing with parallel waveguide for mode division multiplexed transmission

Hanzawa, Nobutomo; Saitoh, K.; Sakamoto, Taiji; Matsui, Takashi; Tsujikawa, Kyozo; Koshiba, Masanori; Yamamoto, Fujio

doi:10.1364/oe.22.029321

Cited by 92 publications

(29 citation statements)

References 12 publications

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“…7. As the LP-mode multi/demultiplexer, a PLC-type mode multi/demultiplexer with mode rotator [14] can be used. The mode rotator can act as the polarization rotator as well as the mode rotator.…”

Section: Period Of Modal Evolutionmentioning

confidence: 99%

What is a mode in few mode fibers?: Proposal of MIMO-free mode division multiplexing using true eigenmodes

Kimura

Watanabe

Miura

et al. 2016

IEICE Electron. Express

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The evolution of electromagnetic field profile of LP modes along with the propagation owing to the difference of propagation constants between constituent true eigenmodes is accurately analyzed. It is shown that the mode demultiplexer can't accurately discriminate the LP mode at the output end and so the MIMO-DSP is inevitable for the mode division multiplexed transmission using LP modes. From the accurate analysis, a transform matrix between LP modes and constituent true eigenmodes is derived and a novel method to configure true eigenmode multi/demultiplexer is proposed to realize MIMO-free transmission.

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Section: Period Of Modal Evolutionmentioning

confidence: 99%

What is a mode in few mode fibers?: Proposal of MIMO-free mode division multiplexing using true eigenmodes

Kimura

Watanabe

Miura

et al. 2016

IEICE Electron. Express

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“…The characteristics of the device are weakly sensitive to the polarization and insensitive to temperature variations. Its performance is comparable to (if not better than) many other mode multiplexers [19], [22], [24]. The device can be readily used in broadband MDM transmission systems.…”

Section: Introductionmentioning

confidence: 85%

“…An approach to (de)multiplexing the LP 11a and LP 11b modes with planar waveguides is to place an LP 11 -mode rotator between two asymmetric couplers [22]. The use of an LP 11mode rotator, however, adds complication to the design and the fabrication of the device.…”

Section: Introductionmentioning

confidence: 99%

Compact Three-Dimensional Polymer Waveguide Mode Multiplexer

Dong

Chiang

Jin

2015

J. Lightwave Technol.

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We propose a compact three-dimensional waveguide mode (de)multiplexer based on the configuration of two collocated asymmetrical directional couplers, formed with two dissimilar single-mode cores placed alongside a central rectangular threemode core in the horizontal and vertical directions, respectively. The waveguides are designed to allow the LP 11a and LP 11b modes of the central core to completely couple to the LP 01 modes of the two side cores, respectively, with the LP 01 mode staying in the central core, which is tapered down at one end to strip off any remaining LP 11 modes. We fabricate the device with polymer materials by the conventional microfabrication process. A typical fabricated device, which has a total length of 9.0 mm, shows coupling ratios varying from 91% to 99% for the two LP 11 modes, and crosstalks among the modes in the side cores varying from −23.2 to −14.6 dB in the wavelength range 1530-1570 nm (the C-band). The crosstalks in the central core are negligible. The insertion loss of the device with fiber leads is about 10 dB and the mode-dependent loss is about ±1 dB. The performance of the device is weakly sensitive to the polarization state of light and insensitive to temperature variations. This device can be used in broadband mode-divisionmultiplexing transmission systems based on few-mode fibers.Index Terms-Integrated optics, multiplexing, optical planar waveguide coupler, optical polymer, optical waveguide component.

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“…Along this line, pulse-shaping and dispersion management applications based on unbroken SUSY fiber chains can be explored within the framework of microwave photonics and radioover-fiber transmissions for the next-generation 5G cellular networks [56,57]. Furthermore, note that in contrast to the classical mode-conversion and mode-filtering strategies based on rectangular waveguides and optical fibers with different widths [39,[58][59][60], the unbroken SUSY procedure allows us to perform these functionalities in an extremely high optical bandwidth (see Figs. 2 and 4).…”

Section: A Unbroken Susymentioning

confidence: 99%

“…[47]. In contrast to the classical mode-filtering strategies based on using optical waveguides with different widths [39,[58][59][60] and the unbroken SUSY procedure, this property allows us to perform a true-mode (de)multiplexing of any (fundamental) LP m1;1 mode, i.e., without having mode conversion between optical waveguides. A second advantage of the proposed isospectral construction is that the slope of the normalized propagation constant b associated withR Fig.…”

Section: Isospectral Potentialsmentioning

confidence: 99%

Supersymmetric Transformations in Optical Fibers

2018

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Supersymmetry (SUSY) has recently emerged as a tool to design unique optical structures with degenerate spectra. Here, we study several fundamental aspects and variants of one-dimensional SUSY in axially symmetric optical media, including their basic spectral features and the conditions for degeneracy breaking. Surprisingly, we find that the SUSY degeneracy theorem is partially (totally) violated in optical systems connected by isospectral (broken) SUSY transformations due to a degradation of the paraxial approximation. In addition, we show that isospectral constructions provide a dimension-independent design control over the group delay in SUSY fibers. Moreover, we find that the studied unbroken and isospectral SUSY transformations allow us to generate refractive-index superpartners with an extremely large phase-matching bandwidth spanning the S þ C þ L optical bands. These singular features define a class of optical fibers with a number of potential applications. To illustrate this, we numerically demonstrate the possibility of building photonic lanterns supporting broadband heterogeneous supermodes with large effective area, a broadband all-fiber true-mode (de)multiplexer requiring no mode conversion, and different mode-filtering, mode-conversion, and pulse-shaping devices. Finally, we discuss the possibility of extrapolating our results to acoustics and quantum mechanics.

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Mode multi/demultiplexing with parallel waveguide for mode division multiplexed transmission

Cited by 92 publications

References 12 publications

What is a mode in few mode fibers?: Proposal of MIMO-free mode division multiplexing using true eigenmodes

What is a mode in few mode fibers?: Proposal of MIMO-free mode division multiplexing using true eigenmodes

Compact Three-Dimensional Polymer Waveguide Mode Multiplexer

Supersymmetric Transformations in Optical Fibers

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