Two-mode multiplexer and demultiplexer based on adiabatic couplers

Xing, Jiejiang; Li, Zhiyong; Xiao, Xi; Yu, Jinzhong; Yu, Yude

doi:10.1364/ol.38.003468

Cited by 159 publications

(68 citation statements)

References 8 publications

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“…[12][13][14][15] Various silicon-based on-chip (de)multiplexers have been demonstrated in the past years, [6] including arrayed-waveguide gratings for WDM, [17] and onchip polarization-handling devices for PDM, [18] as well as mode (de)multiplexers for MDM. [19][20][21] In particular, mode (de)multiplexer for MDM have been proposed by utilizing multimode interferometers, [22] asymmetric Y-junctions, [23,24] topology structures, [25] adiabatic couplers, [26,27] and asymmetric directional couplers (ADCs), [28][29][30] etc. Among them, ADC-based mode (de)multiplexers are popular [30] because of the structural simplicity, the scalability, and the flexibility to excite a desired high-order mode from a launched fundamental mode.…”

Section: Doi: 101002/lpor201700109mentioning

confidence: 99%

“…[34,35] One might notice that most of the mode (de)multiplexers demonstrated previously work for a single polarization only (i.e., TE-or TM-polarization modes). [22][23][24][25][26][27][28][29][30] Further increase in data transmission capacity can be realized if dual polarizations are introduced. For WDM systems, a wavelength-division-multiplexer with dual-polarizations has been demonstrated.…”

Section: Doi: 101002/lpor201700109mentioning

confidence: 99%

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10‐Channel Mode (de)multiplexer with Dual Polarizations

Dai

Wang

et al. 2017

Laser & Photonics Reviews

265

107

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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 (TE 0 and TM 0 ) 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 (-15ß-25 dB) and low excess losses (0.2ß1.8 dB) over a broad wavelength band of ß90 nm, which makes it WDM (wavelength-division-multiplexing)-compatible and thus suitable for high capacity on-chip optical interconnects.

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Section: Doi: 101002/lpor201700109mentioning

confidence: 99%

Section: Doi: 101002/lpor201700109mentioning

confidence: 99%

10‐Channel Mode (de)multiplexer with Dual Polarizations

Dai

Wang

et al. 2017

Laser & Photonics Reviews

265

107

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“…In [76], a design based on multi-mode interference is proposed, but works for two mode-channels only and is not easily extendable for more modechannels. Adiabatic mode-evolution couplers have also been proposed to realize mode (de)multiplexing by using directional couplers [77][78][79] or Y-junctions [80][81][82][83][84][85][86], which can be extended to handling with more mode-channels. In Refs.…”

Section: Mode Converter-multiplexermentioning

confidence: 99%

“…In Refs. [77,78], a mode add-drop multiplexer based on an adiabatic directional-coupler is designed with 1 µm-thick SOI ridge waveguides and the device length is more than 1 mm. The length of an adiabatic directional-coupler can be shortened when using smaller SOI optical waveguides.…”

Section: Mode Converter-multiplexermentioning

confidence: 99%

Silicon Multimode Photonic Integrated Devices for on-Chip Mode-Division-Multiplexed Optical Interconnects

Dai¹,

Jian²,

He³

2013

PIER

116

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Abstract-Multimode spatial-division multiplexing (SDM) technology has attracted much attention for its potential to enhance the capacity of an optical-interconnect link with a single wavelength carrier. For a mode-multiplexed optical-interconnect link, the functional elements are quite different 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 opticalinterconnects. Light propagation and mode conversion in tapered waveguides as well as bent waveguides are discussed first. Recent progress on mode converter-(de)multiplexers is then reviewed. The demands of some functional devices used for mode-multiplexed opticalinterconnects are also discussed. In particular, the fabrication tolerance is analyzed in detail for our hybrid demultiplexer, which enables mode-/polarization-division-(de)multiplexing simultaneously.

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“…In terms of functionality and mass-production capability, integrated waveguide technologies are promising due to their capability to be integrated with other devices on chips. Typical structures used in integrated waveguide technologies include directional couplers [8,9] , adiabatic couplers [10] , and multimode interference (MMI) couplers [11,12] . Due to its large fabrication tolerance and low loss, the MMI-based mode converter-multiplexer will be a potential candidate for integrated few-mode systems.…”

mentioning

confidence: 99%

Proposal of an InP-based few-mode transmitter based on multimode interference couplers for wavelength division multiplexing and mode division multiplexing applications

Zuo

et al. 2016

中国光学快报

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An InP-based monolithically integrated few-mode transmitter aiming at the combination of wavelength division multiplexing (WDM) and mode division multiplexing (MDM) technologies is proposed. The core elements of the proposed transmitter are mode converters and a wavelength-mode division multiplexer that are all based on multimode interference (MMI) couplers. Simulations show that the wavelength-mode division multiplexer has a large fabrication tolerance of 30 and 0.5 μm for the length and the width of the device, respectively. A low loss below 0.26 dB for the passive parts of the transmitter is obtained in the whole C-band wavelength range.OCIS codes: 250.5300, 060.4230, 060.4510. doi: 10.3788/COL201614.080601.Mode-division multiplexing (MDM) technology has emerged as an effective solution to increase the fiber capacity in addition to the commonly used technologies, such as wavelength division multiplexing (WDM) [1][2][3] , optical time division multiplexing (OTDM), polarization division multiplexing (PDM) [4,5] , and advanced modulation formats. In a typical MDM system, mode conversion and multiplexing are indispensable for the transmitters, where the fundamental laser/fiber mode should be converted to high-order modes and multiplexed into a common output. Many structures have been proposed to realize mode conversion and multiplexing, which typically includes fiber-based technology [6] , free-space-opticsbased technology [7] , and integrated-waveguide-based technology. In terms of functionality and mass-production capability, integrated waveguide technologies are promising due to their capability to be integrated with other devices on chips. Typical structures used in integrated waveguide technologies include directional couplers [8,9] , adiabatic couplers [10] , and multimode interference (MMI) couplers [11,12] . Due to its large fabrication tolerance and low loss, the MMI-based mode converter-multiplexer will be a potential candidate for integrated few-mode systems. In addition, as a building block for photonic integrated circuit, MMI has been widely adopted in the generic foundry model [13] , enabling a high possibility of large scale integrated with active components.The principle of MMI is based on the self-imaging effect, which can reproduce single or multiple images of the input optical field profile along the propagation of the light [14] .By choosing a proper length, width, and positions of the input and output arms of the MMI, it is possible to realize mode conversion between the fundamental TE 0 mode and the first-order TE 1 mode [15] . Several groups have reported the design and realization of the MMI-based mode converter/(de)multiplexer on silicon on insulator (SOI) substrate [9,11,16] . Thanks to the large wavelength tolerance of the MMI structure, the mode converter/ (de)multiplexer can work in a wide wavelength range, which also indicates a possibility of WDM-compatible functionality. Considering the integration possibility of laser sources, modulators, mode converters, and wavelengthmode divisi...

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Two-mode multiplexer and demultiplexer based on adiabatic couplers

Cited by 159 publications

References 8 publications

10‐Channel Mode (de)multiplexer with Dual Polarizations

10‐Channel Mode (de)multiplexer with Dual Polarizations

Silicon Multimode Photonic Integrated Devices for on-Chip Mode-Division-Multiplexed Optical Interconnects

Proposal of an InP-based few-mode transmitter based on multimode interference couplers for wavelength division multiplexing and mode division multiplexing applications

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