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

Tu, Donghe; Huang, Xingrui; Yu, Hang; Yin, Yuxiang; Yu, Zhiguo; Wei, Zhongming; Li, Zhiyong

doi:10.1364/oe.474884

Cited by 10 publications

(3 citation statements)

References 31 publications

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“…Besides horizontal expansion by adding the number of output channels, OPDC can be vertically expanded with a cascaded structure [44], which possesses relatively low wavelength sensitivity. Furthermore, the OPDC fabricated on a thin-film lithium niobate platform exhibits the same performance on phase identifying [45], indicating the potential for monolithic integration of the overall PPMAP system on lithium niobate process platform. It should be emphasized that the Gray code generated by OPDC requires an additional codeword conversion unit to transform into the natural binary code for subsequent calculations.…”

Section: Appendix E the Expansibility Of Opdcmentioning

confidence: 82%

Integrated photonics modular arithmetic processor

Wu,

Guo

et al. 2023

Preprint

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Integrated photonics computing has emerged as a promising approach to overcome the limitations of electronic processors in the post-Moore era, capitalizing on the superiority of photonic systems. However, present integrated photonics computing systems face challenges in achieving high-precision calculations, consequently limiting their potential applications, and their heavy reliance on analog-to-digital (AD) and digital-to-analog (DA) conversion interfaces undermines their performance. Here we propose an innovative photonic computing architecture featuring scalable calculation precision and a novel photonic conversion interface. By leveraging Residue Number System (RNS) theory, the high-precision calculation is decomposed into multiple low-precision modular arithmetic operations executed through optical phase manipulation. Those operations directly interact with the digital system via our proposed optical digital-to-phase converter (ODPC) and phase-to-digital converter (OPDC). Through experimental demonstrations, we showcase a calculation precision of 9 bits and verify the feasibility of the ODPC/OPDC photonic interface. This approach paves the path towards liberating photonic computing from the constraints imposed by limited precision and AD/DA converters.

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Section: Appendix E the Expansibility Of Opdcmentioning

confidence: 82%

Integrated photonics modular arithmetic processor

Wu,

Guo

et al. 2023

Preprint

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“…The development trend of electronic ADCs is gradually slowing down as the improvement in electronic components guided by Moore’s law has become slower over the last decade, facing electrical bottlenecks such as aperture jitter and clock Jitter. Therefore, photonic ADCs are a strong candidate for high-speed analog-to-digital conversion [ 5 , 6 , 7 , 8 ], owing to the inherent characteristic of the high speed and low latency of photons.…”

Section: Introductionmentioning

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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“…This important feature has made it possible to create waveguides with a high refractive index difference on most amorphous and crystalline substrates (such as silica and sapphire). Unlike well-known and widely used materials such as silicon and silica, lithium niobate is a crystal without center symmetry and has a large second-order nonlinear absorption, which makes it a leading material for nonlinear optical frequency conversion and generation (for example, second harmonic generation), total frequency generation, differential frequency generation, or spontaneous downward parametric transformation [23][24][25][26][27]. This material also has a large non-linear refractive index and third-order receptivity.…”

Section: Introductionmentioning

confidence: 99%

Generating higher order bright soliton pulse using Integrated Lithium Niobate Waveguides for higher end supercontinuum application

kumar,

Nagarajan,

babu

et al. 2024

Preprint

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The supercontinuum spectrum is generated through a wide range of wavelengths by sending a short and strong pulse to the nonlinear medium and sputtering at the output and is used in optical measurements, spectroscopy, biological imaging optical coherence photography, etc. Integrated photonics is an idea to realize low-cost and microscale communication, sensing, and fast computing methods. In addition, the miniaturization and integration of photonic structures make possible new designs and applications that are inaccessible in their large volumes. Lithium niobate is one of the most widely used and attractive materials in the field of photonics due to its extraordinary electro-optical, acoustic-optical, nonlinear optics, wide transparency window, and relatively high refractive index. In this work, a lithium niobate waveguide is designed by choosing basic solitons as the input pulse and considering various effects such as high-order scattering, self-phase modulation, second harmonic generation, Raman effect, self-downward effect, etc. The proposed waveguide has super-sustainable production. This supercontinuum spectrum is designed in the waveguide, for the 10th order bright soliton at a distance of 35 mm, 4 times the initial width, for the 20th order bright soliton at 9 mm, 4 times the initial width, and for the 30th order bright soliton at 4.5 mm, 5 times the initial pulse width in the frequency domain are created. Such dimensions are suitable for use in photonic integrated circuits.

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

Cited by 10 publications

References 31 publications

Integrated photonics modular arithmetic processor

Integrated photonics modular arithmetic processor

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

Generating higher order bright soliton pulse using Integrated Lithium Niobate Waveguides for higher end supercontinuum application

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