Multiplexer

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Moshe Tur - One of the best experts on this subject based on the ideXlab platform.

  • mode division multiplexing using an orbital angular momentum mode sorter and mimo dsp over a graded index few mode optical fibre
    Scientific Reports, 2015
    Co-Authors: Hao Huang, Giovanni Milione, Martin P J Lavery, Guodong Xie, Yongxiong Ren, Yinwen Cao, Nisar Ahmed, Thien An Nguyen, Daniel A Nolan, Moshe Tur
    Abstract:

    Mode division multiplexing (MDM)- using a multimode optical fiber's N spatial modes as data channels to transmit N independent data streams - has received interest as it can potentially increase optical fiber data transmission capacity N-times with respect to single mode optical fibers. Two challenges of MDM are (1) designing mode (de)Multiplexers with high mode selectivity (2) designing mode (de)Multiplexers without cascaded beam splitting's 1/N insertion loss. One spatial mode basis that has received interest is that of orbital angular momentum (OAM) modes. In this paper, using a device referred to as an OAM mode sorter, we show that OAM modes can be (de)multiplexed over a multimode optical fiber with higher than -15 dB mode selectivity and without cascaded beam splitting's 1/N insertion loss. As a proof of concept, the OAM modes of the LP11 mode group (OAM-1,0 and OAM+1,0), each carrying 20-Gbit/s polarization division multiplexed and quadrature phase shift keyed data streams, are transmitted 5km over a graded-index, few-mode optical fibre. Channel crosstalk is mitigated using 4 × 4 multiple-input-multiple-output digital-signal-processing with <1.5 dB power penalties at a bit-error-rate of 2 × 10(-3).

Kyung Jun Park - One of the best experts on this subject based on the ideXlab platform.

Daoxin Dai - One of the best experts on this subject based on the ideXlab platform.

  • 10 channel mode de Multiplexer with dual polarizations
    Laser & Photonics Reviews, 2018
    Co-Authors: Daoxin Dai, Yaocheng Shi, Shipeng Wang, Shiming Gao, Tingge Dai, Hon Ki Tsang
    Abstract:

    A dual-polarization 10-channel mode (de)Multiplexer is proposed and realized with cascaded dual-core adiabatic tapers on a silicon-on-insulator (SOI) platform. The mode deMultiplexer has a 2.3 μm-wide multimode bus waveguide, which supports six mode-channels of TE polarization and four mode-channels of TM polarization. These ten mode-channels are (de)multiplexed with five cascaded dual-core adiabatic tapers based on SOI nanowires. The widths for these dual-cores are chosen optimally according to the dispersion curves of the dual-core SOI nanowire, so that the desired highest-order modes of TE- and TM-polarizations are extracted simultaneously. These two extracted mode-channels are coupled very efficiently to the fundamental modes of TE- and TM-polarizations (TE0 and TM0) in the narrow waveguide, respectively, which are then separated by using a polarization beam splitter based on bent directional couplers. A chip consisting of a pair of 10-channel mode (de)Multiplexers is fabricated and then tested with data transmission of 30Gbps/channel. The measurement results show that all TM- and TE mode-channels have low crosstalks (–15∼–25 dB) and low excess losses (0.2∼1.8 dB) over a broad wavelength band of ∼90 nm, which makes it WDM (wavelength-division-multiplexing)-compatible and thus suitable for high capacity on-chip optical interconnects.

  • silicon mode de Multiplexer enabling high capacity photonic networks on chip with a single wavelength carrier light
    Optics Letters, 2013
    Co-Authors: Daoxin Dai, Jian Wang, Yaocheng Shi
    Abstract:

    A small silicon mode (de)Multiplexer with cascaded asymmetrical directional couplers is demonstrated experimentally. As an example, a four channel mode (de)Multiplexer is designed and realized for TM polarization. The fabricated mode (de)Multiplexer has a low excess loss (<1  dB) as well as low crosstalk (≤23 dB) over a broad wavelength range (∼20  nm). More channels can be achieved with two sets of orthogonal-polarization modes (e.g., 2N=8) multiplexed when desired.

  • silicon multimode photonic integrated devices for on chip mode division multiplexed optical interconnects
    Progress in Electromagnetics Research-pier, 2013
    Co-Authors: Daoxin Dai, Jian Wang, Sailing He
    Abstract:

    Multimode spatial-division multiplexing (SDM) technol- ogy has attracted much attention for its potential to enhance the ca- pacity of an optical-interconnect link with a single wavelength car- rier. For a mode-multiplexed optical-interconnect link, the functional elements are quite difierent from the conventional ones as multiple modes are involved. In this paper we give a review and discussion on multimode photonic integrated devices for mode-multiplexed optical- interconnects. Light propagation and mode conversion in tapered waveguides as well as bent waveguides are discussed flrst. Recent progress on mode converter-(de)Multiplexers is then reviewed. The demands of some functional devices used for mode-multiplexed optical- interconnects are also discussed. In particular, the fabrication toler- ance is analyzed in detail for our hybrid deMultiplexer, which enables mode-/polarization-division-(de)multiplexing simultaneously.

Hao Huang - One of the best experts on this subject based on the ideXlab platform.

  • mode division multiplexing using an orbital angular momentum mode sorter and mimo dsp over a graded index few mode optical fibre
    Scientific Reports, 2015
    Co-Authors: Hao Huang, Giovanni Milione, Martin P J Lavery, Guodong Xie, Yongxiong Ren, Yinwen Cao, Nisar Ahmed, Thien An Nguyen, Daniel A Nolan, Moshe Tur
    Abstract:

    Mode division multiplexing (MDM)- using a multimode optical fiber's N spatial modes as data channels to transmit N independent data streams - has received interest as it can potentially increase optical fiber data transmission capacity N-times with respect to single mode optical fibers. Two challenges of MDM are (1) designing mode (de)Multiplexers with high mode selectivity (2) designing mode (de)Multiplexers without cascaded beam splitting's 1/N insertion loss. One spatial mode basis that has received interest is that of orbital angular momentum (OAM) modes. In this paper, using a device referred to as an OAM mode sorter, we show that OAM modes can be (de)multiplexed over a multimode optical fiber with higher than -15 dB mode selectivity and without cascaded beam splitting's 1/N insertion loss. As a proof of concept, the OAM modes of the LP11 mode group (OAM-1,0 and OAM+1,0), each carrying 20-Gbit/s polarization division multiplexed and quadrature phase shift keyed data streams, are transmitted 5km over a graded-index, few-mode optical fibre. Channel crosstalk is mitigated using 4 × 4 multiple-input-multiple-output digital-signal-processing with <1.5 dB power penalties at a bit-error-rate of 2 × 10(-3).

Nicolas K Fontaine - One of the best experts on this subject based on the ideXlab platform.

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