1 × 4 Channel Si-Nanowire Microring-Assisted Multiple Delayline-Based Optical MUX/DeMUX

Jeong, Seok–Hwan; Tao, Yu; Morito, Ken

doi:10.1109/jlt.2015.2457431

Cited by 18 publications

(12 citation statements)

References 23 publications

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“…Compared with finite impulse response elements, such as MZIs-only layouts or AWGs, the ARMA filters provide more uniform passbands, stronger out-of-band rejection and sharper spectral transitions with fewer waveguide paths [25]. Multi-stage ARMA DWDM devices in silicon were successfully demonstrated in several previous works [26], [27]. However, the relative complexity of the layout restricted these devices to four-port operation, wide channel spacing and elevated crosstalk levels.…”

Section: Introductionmentioning

confidence: 99%

Eight-Channel Silicon-Photonic Wavelength Division Multiplexer With 17 GHz Spacing

Munk¹,

Katzman²,

Kaganovskii³

et al. 2019

IEEE J. Select. Topics Quantum Electron.

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Dense wavelength division multiplexers are key components of data communication networks. This paper presents a silicon-photonic eight-channel multiplexer device with a channel spacing of only 0.133 nm (17 GHz). Devices were fabricated in a commercial silicon foundry, in 8" silicon-on-insulator wafers. The device layout consists of seven unbalanced Mach-Zehnder interferometers in a cascaded tree topology, and each interferometer unit also includes a nested ring resonator element. The transfer function of each unit is that of a maximally flat, autoregressive, moving-average filter. The devices are characterized by uniform passbands, sharp spectral transitions between pass and stop bands, and strong out-of-band rejection. The worst-case optical power crosstalk is −22 dB. The proper function of the device requires careful control of optical phase delays over 14 distinct optical paths. Post-fabrication trimming of phase delays was performed through local illumination of a photo-sensitive upper cladding layer of chalcogenide glass. The de-multiplexing of three adjacent QAM-16, 40 Gbit/s wavelength-division channels was successfully demonstrated. The devices are applicable in data communication and in integrated-photonic processing of radio-over-fiber waveforms.

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Section: Introductionmentioning

confidence: 99%

Eight-Channel Silicon-Photonic Wavelength Division Multiplexer With 17 GHz Spacing

Munk¹,

Katzman²,

Kaganovskii³

et al. 2019

IEEE J. Select. Topics Quantum Electron.

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show abstract

“…It is noted that the device inherently includes a cross junction to construct compact polarization diversified configuration. The crossing shape was optimized for minimizing size, excess loss (<0.1 dB) and optical leakage (<−30 dB) [10].…”

Section: Device Configuration and Analytic Studymentioning

confidence: 99%

“…Two kinds of the aforementioned requirements could be achieved by cascaded connecting additional DMZIs [30] or by using another filter architecture based on microring assisted DMZI scheme where spectral flatness and crosstalk are markedly improved by adjusting phase variation against a wavelength in all-passive type microring resonator [10].…”

Section: B Spectral Discontinuitymentioning

confidence: 99%

Polarization Diversified 16λ Demultiplexer Based on Silicon Wire Delayed Interferometers and Arrayed Waveguide Gratings

Jeong

Onawa

Shimura

et al. 2020

J. Lightwave Technol.

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We proposed novel 16λ demultiplexer based on cascaded connection of silicon-nanowire waveguide type delayed interferometric filters and arrayed waveguide gratings, and experimentally verified 100-GHz-spaced bandpass filtering operation with nearly identical insertion loss (<6 dB) and low crosstalk (<−19.5 dB to <−34.6 dB for a single channel, <−12.7 dB for entire output channels). We also demonstrated polarization diversified operation with 32 Gbps non-return-to-zero (NRZ) signal transmissions in C-band range. We also verified the operation of 140-GHz-spaced bandpass filtering in O-band spectral range.

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“…[3][4][5][6][7][8][9][10][11][12] EAMs for four-level pulse amplitude modulation (PAM4) and PAM8 formats have also been demonstrated. [13][14][15][16][17] On the other hand, devices based on multimode interference (MMI) waveguides 18) are utilized for passive 3-dB couplers, [19][20][21] LDs, 22,23) optical path switches, [24][25][26] splitting ratio-tunable couplers, 27) and polarization beam splitters. 28) Novel MMI-based intensity modulators have also been proposed.…”

Section: Introductionmentioning

confidence: 99%

Proposal of compact multimode interference optical modulator with high extinction ratio

Kanesaka

ARAKAWA

2022

Jpn. J. Appl. Phys.

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We proposed a compact 1×1 multimode interference (MMI) optical modulator with a high extinction ratio. A triply coupled quantum well structure is designed for the core layer for the enhancement of the quantum-confined Stark effect, and the MMI waveguide with isolation trenches is symmetrically designed. The length of the MMI modulator is reduced by 30%, and the wavelength dependence was reduced compared with that observed in the previously reported MMI modulator. Owing to both the electroabsorption effect and the electric-field induced refractive index change in a multiple-quantum-well core layer, the extinction ratio is expected to be approximately 45 dB at an operating voltage of 3.3 V.

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1 × 4 Channel Si-Nanowire Microring-Assisted Multiple Delayline-Based Optical MUX/DeMUX

Cited by 18 publications

References 23 publications

Eight-Channel Silicon-Photonic Wavelength Division Multiplexer With 17 GHz Spacing

Eight-Channel Silicon-Photonic Wavelength Division Multiplexer With 17 GHz Spacing

Polarization Diversified 16λ Demultiplexer Based on Silicon Wire Delayed Interferometers and Arrayed Waveguide Gratings

Proposal of compact multimode interference optical modulator with high extinction ratio

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