Tunable Bandpass Filter With Serially Coupled Ring Resonators Assisted MZI

Kohli, Niharika; Sang, Bruno Lee; Nabki, Frédéric; Ménard, Michel

doi:10.1109/jphot.2021.3103142

“…The MRMs have the advantages of a compact size and a high modulation bandwidth, which have been demonstrated with a modulation bandwidth of 110 GHz 62 . To increase the channels and to reduce the crosstalk, de-/multiplexers based on MRRs 63 – 65 , asymmetric MZIs 66 , 67 , and MRR-coupled MZIs 68 , 69 can be inserted before and after the silicon MRR modulator arrays. At the receiver end, we employ a silicon-based CDC utilizing cascaded MRRs to simultaneously compensate for the CD induced by SMF transmission across all the wavelength channels.…”

Section: Resultsmentioning

confidence: 99%

Parallel wavelength-division-multiplexed signal transmission and dispersion compensation enabled by soliton microcombs and microrings

Liu,

Zhang,

Liu

et al. 2024

Nat Commun

3

0

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The proliferation of computation-intensive technologies has led to a significant rise in the number of datacenters, posing challenges for high-speed and power-efficient datacenter interconnects (DCIs). Although inter-DCIs based on intensity modulation and direct detection (IM-DD) along with wavelength-division multiplexing technologies exhibit power-efficient and large-capacity properties, the requirement of multiple laser sources leads to high costs and limited scalability, and the chromatic dispersion (CD) restricts the transmission length of optical signals. Here we propose a scalable on-chip parallel IM-DD data transmission system enabled by a single-soliton Kerr microcomb and a reconfigurable microring resonator-based CD compensator. We experimentally demonstrate an aggregate line rate of 1.68 Tbit/s over a 20-km-long SMF. The extrapolated energy consumption for CD compensation of 40-km-SMFs is ~0.3 pJ/bit, which is calculated as being around 6 times less than that of the commercial 400G-ZR coherent transceivers. Our approach holds significant promise for achieving data rates exceeding 10 terabits.

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“…To increase the channels and to reduce the crosstalk, de-/multiplexers based on MRRs [48][49][50] , asymmetric MZIs 51,52 , and MRR-coupled MZIs 53,54 can be inserted before and after the silicon MRR modulator arrays. At the receiver end, we employ a silicon-based dispersion compensator utilizing cascaded MRRs to simultaneously compensate for the dispersion induced by SMF transmission across all the wavelength channels.…”

Section: Parallel Im-dd Data Transmission and Dispersion Compensation...mentioning

confidence: 99%

Parallel Wavelength-Division-Multiplexed Signal Transmission and Dispersion Compensation Enabled by Soliton Microcombs and Microrings

Lu,

Liu,

Zhang

et al. 2023

Preprint

0

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The proliferation of computation-intensive technologies has led to a significant rise in the number of datacenters, posing challenges for high-speed and power-efficient datacenter interconnects (DCIs). Although inter-DCIs based on intensity modulation and direct detection (IM-DD) along with wavelength-division multiplexing (WDM) technologies exhibit cost-effective, power-efficient, and large-capacity properties, the requirement of multiple laser sources leads to high costs and limited scalability. Moreover, careful considerations must be given to the chromatic dispersion in the C-band as it restricts the transmission length of the optical signals. Electronic and optical approaches based on digital signal processing algorithms or dispersion-compensating fibers suffer from either a high power consumption or a lack of full reconfigurability. In this study, we present an original scalable on-chip parallel IM-DD data transmission system enabled by a single-soliton Kerr microcomb and a reconfigurable microring resonator (MRR)-based dispersion compensator. The highly compact MRR-based Kerr microcomb and dispersion compensator are intrinsically compatible with the parallel processing nature of the WDM link. Besides, the reconfigurability of the dispersion compensator shows the validation for various data-rate transmissions over multiple single-mode fiber lengths of up to 40 km, with a power consumption of below 160 mW, regardless of the modulation format or of the number of transmission channels utilized. Through our experimental validation, we demonstrate an aggregate bit rate of 1.68 Tbit/s over a 20-km-long single-mode fiber using 15 independent wavelength channels spaced at 100 GHz. Our approach holds significant promise for achieving data communications at a scale exceeding 10 terabits, making it highly valuable for future hyper-scale DCIs.

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“…Their ability to selectively pass or stop different spectral bands is very important in various applications, including optical communication, interconnect, spectroscopy, and sensing [1][2][3][4][5][6]. In recent decades, numerous integrated filters with diverse structures have been proposed, such as arrayed waveguide grating (AWG), echelle diffraction grating (EDG), microring, microdisk, Bragg grating, photonic crystal (PC), Mach-Zehnder interferometer (MZI), directional coupler (DC), and so on [7][8][9][10][11][12][13][14][15][16][17]. By modifying their basic structures, employing new materials, and combining them, customized filtering performances required for specific applications can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Integrated Broadband Filter with Sharp Transition Edges Based on SiN and SiON Composite Waveguide Coupler

Ma,

Shao,

Gu

et al. 2023

Photonics

1

0

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Broadband filters with sharp transition edges are important elements in diverse applications, including Raman and fluorescence spectral analysis, wideband wavelength-division multiplexing (WDM), and multi-octave interferometry. While the multi-layer thin-film interference broadband filter has been widely applied in various free-space optical systems, its integrated counterpart is still far from mature, which is also highly desired for constructing chip-scale miniature optical modules. In this article, we design, fabricate, and characterize an integrated broadband filter with sharp transition edges. An adiabatic coupler based on silicon nitride (SiN) and silicon oxynitride (SiON) composite waveguide is employed here. Long-pass, short-pass, band-pass, and band-stop filters can be realized in a single design of the composite waveguide coupler for a specific wavelength range, with only a difference in the SiN taper waveguide width. Experimental results with a roll-off value of larger than 0.7 dB nm−1 and a 15 dB extinction ratio (ER) are presented.

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Tunable Bandpass Filter With Serially Coupled Ring Resonators Assisted MZI

Cited by 8 publications

References 32 publications

Parallel wavelength-division-multiplexed signal transmission and dispersion compensation enabled by soliton microcombs and microrings

Parallel wavelength-division-multiplexed signal transmission and dispersion compensation enabled by soliton microcombs and microrings

Parallel Wavelength-Division-Multiplexed Signal Transmission and Dispersion Compensation Enabled by Soliton Microcombs and Microrings

Integrated Broadband Filter with Sharp Transition Edges Based on SiN and SiON Composite Waveguide Coupler

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