96-Channel on-chip reconfigurable optical add-drop multiplexer for multidimensional multiplexing systems

Zhao, Weike; Peng, Yingying; Cao, Xiaoping; Zhao, Shenzhi; Liu, Ruoran; Wei, Yihui; Liu, Dajian; Yi, Xiaolin; Han, Shangtong; Wan, Yuanjian; Li, Kang; Wu, Guangze; Wang, Jian; Shi, Yaocheng; Dai, Daoxin

doi:10.1515/nanoph-2022-0319

Cited by 22 publications

(19 citation statements)

References 62 publications

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“…These mode‐hybridness regions might introduce inter‐mode conversion, introducing some inconvenience for the design of multimode photonic devices. [ 39,42 ] In contrast, for Z ‐propagation LNOI waveguides, TE‐polarization modes have much larger effective indices than TM‐polarization modes (which are nearly cut‐off when w < 3 µm), as shown in Figure 1b. Such mode property is favorable for the design of mode (de)multiplexer based on adiabatic DCs, which is more preferred than regular ADCs because of broader bandwidths and larger fabrication tolerances.…”

Section: Principle and Designmentioning

confidence: 99%

High‐Performance Mode‐Multiplexing Device with Anisotropic Lithium‐Niobate‐on‐Insulator Waveguides

Zhao

Liu

Zhu

et al. 2023

Laser & Photonics Reviews

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Thin-film lithium-niobate photonics has attracted intensive attention due to its superior material properties. In particular, multimode lithium-niobate photonics is becoming attractive for the applications of high-capacity optical interconnects and high-efficiency nonlinear optics. However, multimode manipulation in lithium-niobate-on-insulator (LNOI) waveguides is not easy because there might occur some mode hybridness due to the vertical asymmetry as well as the material anisotropy. In this paper, high-performance mode-multiplexing devices with anisotropic LNOI waveguides are proposed, consisting of a multi-channel mode (de)multiplexer and a sharp multimode waveguide bend (MWB). The mode (de)multiplexer is designed with Z-propagation LNOI waveguides to avoid the mode hybridness. Meanwhile, the sharp MWB is designed to connect with a Y-propagation waveguide, enabling access to the highest electro-optic coefficient and second-order nonlinear coefficient. The fabricated mode (de)multiplexer has a low excess loss less than 0.2 dB as well as low crosstalk less than -19 dB in the wavelength range of 1520-1600 nm. These high-performance multimode photonic devices are useful for developing multimode LN photonics.

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Section: Principle and Designmentioning

confidence: 99%

High‐Performance Mode‐Multiplexing Device with Anisotropic Lithium‐Niobate‐on‐Insulator Waveguides

Zhao

Liu

Zhu

et al. 2023

Laser & Photonics Reviews

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“…Wavelength division multiplexing (WDM) or mode division multiplexing (MDM) has been extensively exploited to transmit or process huge amounts of data in parallel. [1][2][3][4][5][6][7][8] As such, it has been the subject of interest to develop broadband [9][10][11][12][13][14][15] and multimode [16][17][18][19][20] functional elements, which can support a large number of wavelength or mode channels.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐Broadband Multimode Waveguide Crossing via Subwavelength Transmitarray with Bound State

Guo

Wang

Zhang

et al. 2023

Laser & Photonics Reviews

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As a fundamental building block for photonic integrated circuits, waveguide crossing is playing an essential role for routing the increasingly complex network on chip. Driven by the demands for carrying a large capacity of data per waveguide, wavelengths and guiding modes are emerging as important degrees of freedom for optical multiplexing to embrace the advantages of signal parallelism. Although various waveguide crossing structures are proposed to either support broad spectra of wavelengths or a large number of modes, none of these are simultaneously achieved. Here, an ultra-broadband multimode waveguide crossing based on subwavelength transmitarray (SWTA) is proposed. The SWTA is well designed for high transmittance in the propagation direction and excellent confinement in its orthogonal direction by creation of a bound state. A three-mode crossing is designed and fabricated on silicon on insulator with a compact footprint of only 5.05 µm × 5.05 µm. The crossing is able to operate over a large bandwidth from 1.4 to 2.1 µm with an excess loss of less than 0.77 dB. For a proof-of-concept demonstration of the structure scalability, the crossing is predicted to support up to ten modes. The ultra-broadbandwidth and compactness of this multimode crossing make it possible to densely cross connect the waveguides with large data capacity via wavelength and mode division multiplexing.

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“…In contrast, MRR arrays can realize a low loss, low crosstalk WDM filter with a compact footprint. In [28], a 96-channel hybrid PDM-MDM-WDM (de)multiplexer was realized by monolithically integrating a 6-channel mode/polarization (de)multiplexer and 16-wavelength-channel microring resonators (MRRs) arrays. In [29] , a 16-channel PDM-WDM (de)multiplexer was re-alized by using a PRS and an 8-channel cascaded MRRs array.…”

Section: Introductionmentioning

confidence: 99%

A 32-Channel C-Band Hybrid Wavelength/ Polarization Division (de)multiplexer on Silicon

Yin

Huang

et al. 2023

IEEE Photonics J.

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A 32-channel hybrid (de)multiplexer on silicon is designed and experimentally demonstrated to enable polarization division multiplexing (PDM) and wavelength division multiplexing (WDM) for improving the capacity of optical communication links. The hybrid (de)multiplexer is realized by monolithically integrating a polarization rotator and splitter (PRS) and two 16-channel microring resonators (MRRs) arrays. The through and cross ports of the PRS are connected to the bus waveguide of the MRR arrays, respectively. In order to ensure a larger free spectrum range (FSR) to cover all wavelength channels, the radius of the microring is about 3 µm and the wavelength-channel spacing is 1.6 nm. For the hybrid (de)multiplexer, the crosstalk between the adjacent channels and the non-adjacent channels are -20 dB and -25 dB, respectively. When TE0 mode input, the insertion loss is 1.5 dB -3.8 dB, the crosstalk between the through and cross port is less than -24 dB. When TM0 mode inputs, the insertion loss is 1.9 dB -4.5 dB and the polarization crosstalk is less than -22 dB. In order to eliminate the influence of the fabrication errors and temperature on resonance wavelength, a TiN thermal tuning electrode is added to calibrate the deviation of the wavelength.

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96-Channel on-chip reconfigurable optical add-drop multiplexer for multidimensional multiplexing systems

Cited by 22 publications

References 62 publications

High‐Performance Mode‐Multiplexing Device with Anisotropic Lithium‐Niobate‐on‐Insulator Waveguides

High‐Performance Mode‐Multiplexing Device with Anisotropic Lithium‐Niobate‐on‐Insulator Waveguides

Ultra‐Broadband Multimode Waveguide Crossing via Subwavelength Transmitarray with Bound State

A 32-Channel C-Band Hybrid Wavelength/ Polarization Division (de)multiplexer on Silicon

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