Mode-Conversion-Based Chirped Bragg Gratings on Thin-Film Lithium Niobate

Tu, Donghe; Huang, Xingrui; Yin, Yuxiang; Yu, Hang; Yu, Zhiguo; Guan, Huan; Li, Zhiyong

doi:10.3390/photonics9110828

Cited by 3 publications

(2 citation statements)

References 34 publications

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“…The simulation results show the three designed couplers exhibited ≤0.3 dB of loss across the C band. To further achieve a broadband and fabrication-tolerant mode conversion, adiabatic directional couplers with a tapered waveguide design [ 22 ] could be used.…”

Section: Design Of the Tmimentioning

confidence: 99%

A Time Mode Pulse Interleaver in a Silicon-on-Insulator Platform for Optical Analog-to-Digital Converters

Tu,

Li,

Yin

et al. 2024

Micromachines

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We propose and demonstrate a novel on-chip optical sampling pulse interleaver based on time mode interleaving. The designed pulse interleaver was fabricated on a 220 nm silicon-on-insulator (SOI) platform, utilizing only one S-shaped delay waveguide. Interleaving is achieved by the relative time delay between different optical modes in the waveguide, eliminating the need for any active tuning. The total length of the delay waveguide is 5620.5 µm, which is reduced by a factor of 46.3% compared with previously reported time-wavelength interleaver schemes. The experimental results indicate that the device can convert an optical pulse into a 40 GHz pulse sequence composed of four pulses with a root mean square (RMS) timing error of 0.9 ps, making it well suited for generating high-frequency sampling pulses for optical analog-to-digital converters.

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Section: Design Of the Tmimentioning

confidence: 99%

A Time Mode Pulse Interleaver in a Silicon-on-Insulator Platform for Optical Analog-to-Digital Converters

Tu,

Li,

Yin

et al. 2024

Micromachines

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“…However, this grating works on reflection mode, so an optical circulator is required to separate the reflected signal, which is difficult for onchip integration. Many solutions have been proposed to try to overcome this challenge, such as 3 dB Y-branch [5], adiabatic directional coupler (ADC) [6], and grating-assisted counter-directional couplers [7,8].…”

Section: Introductionmentioning

confidence: 99%

On-Chip Multichannel Dispersion Compensation and Wavelength Division MUX/DeMUX Using Chirped-Multimode-Grating-Assisted Counter-Directional Coupler

Lv,

Du,

2024

Photonics

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On-chip optical dispersion compensation and wavelength division multiplexing/demultiplexing (WDM) are highly demanded functions for optical communications. In this work, we proposed a multichannel dispersion compensation structure based on chirped multimode grating within a counter-directional coupler (CMG-CDC). Simultaneous wavelength division multiplexing and demultiplexing can be realized within a compact footprint. A device design for four-channel CMG-CDC at the C/L (1530–1565 nm) band is presented with a channel spacing of 20 nm assisted by a grooved multimode waveguide structure. The average dispersion for all channels is about −2.25 ps/nm with a channel bandwidth of about 3.1 nm. The device is highly compact and highly scalable, which makes it rather convenient for increasing the group velocity dispersion (GVD) and channel number, indicating flexible applications for versatile systems, including typically coarse wavelength division multiplexer four-lane (CWDM4) transceivers.

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Photonic sampled and quantized analog-to- digital converters on thin-film lithium niobate platform

Huang

et al. 2023

Opt. Express

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In this paper, an on-chip photonic sampled and quantized analog-to-digital converter (ADC) on thin-film lithium niobate platform is experimentally demonstrated. Using two phase modulators as a sampler and a 5×5 multimode interference (MMI) coupler as a quantizer, a 1 GHz sinusoidal analog input signal was successfully converted to a digitized output with a 20 GSample/s sampling rate. To evaluate the system performance, the quantization curves together with the transfer function of the ADC were measured. The experimental effective number of bits (ENOB) was 3.17. The demonstrated device is capable of operating at a high frequency over 67 GHz, making it a promising solution for on-chip ultra-high speed analog-to-digital conversion.

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Mode-Conversion-Based Chirped Bragg Gratings on Thin-Film Lithium Niobate

Cited by 3 publications

References 34 publications

A Time Mode Pulse Interleaver in a Silicon-on-Insulator Platform for Optical Analog-to-Digital Converters

A Time Mode Pulse Interleaver in a Silicon-on-Insulator Platform for Optical Analog-to-Digital Converters

On-Chip Multichannel Dispersion Compensation and Wavelength Division MUX/DeMUX Using Chirped-Multimode-Grating-Assisted Counter-Directional Coupler

Photonic sampled and quantized analog-to- digital converters on thin-film lithium niobate platform

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