Ultra-Broadband Mode Splitter Based on Phase Controlling of Bridged Subwavelength Grating

Jiang, Weifeng; Wang, Xinguo

doi:10.1109/jlt.2020.2971282

Cited by 18 publications

(4 citation statements)

References 32 publications

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“…As a result, it is very desired to develop various high-performance multimode photonic devices on silicon for the manipulation of higher-order modes. Currently many multimode silicon photonic devices have been developed, e.g., on-chip mode (de) multiplexers [174][175][176][177][178][179][180][181][182][183][184][185][186][187][188][189][190][191][192][193], higher-order mode generator and exchanger , multimode splitter [215][216][217][218][219][220], MWBs [221][222][223][224][225][226][227][228][229][230][231][232][233][234][235][236], MWCs [237][238][239][240][241]…”

Section: Subwavelength Silicon Photonics For Higher-order-mode Manipulationmentioning

confidence: 99%

“…In particular, there is an SWG-assisted mode evolution region inserted in the multimode bus waveguide, so that the TE 0 , TE 1 and TE 2 modes can be finally localized in Fig. 9 a A 12-channel mode (de) multiplexer based on SWG-assisted ADCs [187]; b Higher-order mode (de) multiplexer based on an SWG-assisted dual-core adiabatic tapers [190]; c An SWG-assisted multimode adddrop multiplexer [191]; d Mode (de) multiplexer based on bridged SWG waveguides [193] the left, middle, and right regions, respectively. With this design, one can add/drop any mode-channel by placing a singlemode access waveguide at the left or right side of the bus waveguide.…”

Section: Swg-assisted Mode-selective Couplersmentioning

confidence: 99%

“…Most recently, a broadband mode-selective coupler is introduced to separate the TM 0 and TM 1 mode by the phase controlling of the bridged SWG waveguides [see Fig. 9(d)] [193]. Here the TM 0 mode is influenced by the central bridge much more than the TM 1 mode.…”

Section: Swg-assisted Mode-selective Couplersmentioning

confidence: 99%

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Subwavelength silicon photonics for on-chip mode-manipulation

Zhang

et al. 2021

PhotoniX

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On-chip mode-manipulation is one of the most important physical fundamentals for many photonic integrated devices and circuits. In the past years, great progresses have been achieved on subwavelength silicon photonics for on-chip mode-manipulation by introducing special subwavelength photonic waveguides. Among them, there are two popular waveguide structures available. One is silicon hybrid plasmonic waveguides (HPWGs) and the other one is silicon subwavelength-structured waveguides (SSWGs). In this paper, we focus on subwavelength silicon photonic devices and the applications with the manipulation of the effective indices, the modal field profiles, the mode dispersion, as well as the birefringence. First, a review is given about subwavelength silicon photonics for the fundamental-mode manipulation, including high-performance polarization-handling devices, efficient mode converters for chip-fiber edge-coupling, and ultra-broadband power splitters. Second, a review is given about subwavelength silicon photonics for the higher-order-mode manipulation, including multimode converters, multimode waveguide bends, and multimode waveguide crossing. Finally, some emerging applications of subwavelength silicon photonics for on-chip mode-manipulation are discussed.

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Section: Subwavelength Silicon Photonics For Higher-order-mode Manipulationmentioning

confidence: 99%

Section: Swg-assisted Mode-selective Couplersmentioning

confidence: 99%

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Subwavelength silicon photonics for on-chip mode-manipulation

Zhang

et al. 2021

PhotoniX

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“…Considerable mode converters and mode (de)multiplexers implemented with asymmetry directional couplers (ADCs) have been reported [8,9,13,29] based on this principle. To further improve the fabrication tolerance thus scaling up the mode channel numbers, subwavelength grating structures (SWG) have been proposed [30][31][32]. Besides, there are other resonant coupling devices including both directional grating couplers and contra-directional grating assisted couplers [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Scalable Metasurface Building Blocks for Arbitrary On-chip High-order Mode Manipulation

Xiang

Tao

Zhao

et al. 2020

2020 European Conference on Optical Communications (ECOC)

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On-chip integrated mode-division multiplexing (MDM) has been emerging as a promising technology to further improve the link capacity and satisfy the continuously increasing bandwidth demand in data communications. One of the most important components in MDM and multimode photonics is a mode converter. While several configurations have been developed to realize on-chip mode converters, it is still very challenging to achieve versatile high-order mode converters with high performance in a generic way to reduce the R&D and prototyping costs. Here we initiate a breakthrough utilizing a simple yet universal generic building block concept with metasurface structures to implement programmable arbitrary highorder mode converters with competitive performance, high reliability and compact footprints. The building block, i.e., the TE0-TE2 mode converter is first introduced to illustrate the generic concept, which exhibits low insertion loss of 0.3 dB, low crosstalk of -10 dB across broad wavelength band of 250 nm with a footprint of 2.7×1.3 µ 2 m . All even-order and odd-order mode converters can be realized by directly programming multiple parallel basic building blocks and coarsely engineering the waveguide widths simply in a universal approach. The proposed mode converter building blocks for high-order mode conversion highlight features of uniform performance with broad bandwidth, low insertion loss, compact footprints and good fabrication tolerance, plus the uniquely simple and scalable generic fashion, making them extremely attractive for on-chip multimode optical interconnections.

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