Sai T. Chu
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View article: Diode-pumped wavelength-switchable quasi-three-level Nd:LiLuF4 laser on the 4F3/2→4I9/2 transition
Diode-pumped wavelength-switchable quasi-three-level Nd:LiLuF4 laser on the 4F3/2→4I9/2 transition Open
We first demonstrate a continuous-wave (CW) wavelength-switchable quasi-three-level Nd:LiLuF 4 laser operating at 4 F 3/2 → 4 I 9/2 transition. By shifting the pump beam waist location in the Nd:LLF, switching between single-wavelength (SW…
View article: TOPS‐Speed Reconfigurable Photonic Transposed Convolution Accelerator for Generative Tasks
TOPS‐Speed Reconfigurable Photonic Transposed Convolution Accelerator for Generative Tasks Open
Transposed convolution, crucial in large‐parameter generative models ranging from content creation to autonomous driving, imposes substantial demands on GPU memory and energy consumption in electronic processors. Electronic processors, fun…
View article: Dual-pumping supercontinuum generation and temporal reflection in a nonlinear photonic integrated circuit
Dual-pumping supercontinuum generation and temporal reflection in a nonlinear photonic integrated circuit Open
We report on what we believe is the first demonstration of on-chip supercontinuum generation through dual-wavelength pumping of a nonlinear photonic integrated circuit, fabricated from high-index doped silica glass. In addition to the band…
View article: Orthogonally polarized dual-wavelength Nd:LaMgAl11O19/Nd:SrAl12O19 laser at 1297 and 1306 nm with adjustable ratio of output powers
Orthogonally polarized dual-wavelength Nd:LaMgAl11O19/Nd:SrAl12O19 laser at 1297 and 1306 nm with adjustable ratio of output powers Open
Using tunable in-band laser diode (LD) pumping (791.1–798.2 nm), an orthogonally polarized dual-wavelength (OPDW) Nd:LaMgAl 11 O 19 /Nd:SrAl 12 O 19 (Nd:LMA/Nd:SA) operation at 1297 nm and 1306 nm for the 4 F 3/2 → 4 I 13/2 transition is d…
View article: Use of MRI-double inversion recovery sequence for early diagnosis of multiple sclerosis: case series
Use of MRI-double inversion recovery sequence for early diagnosis of multiple sclerosis: case series Open
The choice of additional Double Inversion Recovery (DIR) Magnetic Resonance Imaging (MRI) sequences may affect the judgment of the presence and nature of lesions. Herein, we reported three cases initially presenting with non-typical multip…
View article: Well-Posedness of the Fisher–KPP Equation with Neumann, Dirichlet, and Robin Boundary Conditions on the Real Half Line
Well-Posedness of the Fisher–KPP Equation with Neumann, Dirichlet, and Robin Boundary Conditions on the Real Half Line Open
We consider the Fisher–KPP equation with Neumann boundary conditions on the real half line. We claim that the Fisher-KPP equation with Neumann boundary conditions is well-posed only for odd positive stationary solutions. We begin by provin…
View article: Cross dual-microcomb dispersion interferometry ranging
Cross dual-microcomb dispersion interferometry ranging Open
Soliton microcombs offer unprecedented laser sources for high-precision ranging due to their merits of high repetition rate, excellent coherence, and compact size. However, high repetition rate limits the nonambiguity range (NAR) of rangin…
View article: Ultra-broadband photon pair generation on CMOS-compatible chip
Ultra-broadband photon pair generation on CMOS-compatible chip Open
Frequency-entangled photon pairs play a vital role in various quantum technologies, including quantum computing, quantum communication, and quantum sensing. Broadening the bandwidth of frequency-entangled photon pairs enhances the performa…
View article: Recent Advancements in Optical Fiber Sensors for Non-Invasive Arterial Pulse Waveform Monitoring Applications: A Review
Recent Advancements in Optical Fiber Sensors for Non-Invasive Arterial Pulse Waveform Monitoring Applications: A Review Open
The awareness of the importance of monitoring human vital signs has increased recently due to the outbreak of the COVID-19 pandemic. Non-invasive heart rate monitoring devices, in particular, have become some of the most popular tools for …
View article: Leveraging Machine Learning and a Photonic Integrated Chip for the Spectro-Temporal Tailoring of Supercontinuum Generation
Leveraging Machine Learning and a Photonic Integrated Chip for the Spectro-Temporal Tailoring of Supercontinuum Generation Open
International audience
View article: Harnessing Electro-Optic Modulation and On-Chip Temporal Interleaving Towards Versatile Frequency Comb Generation
Harnessing Electro-Optic Modulation and On-Chip Temporal Interleaving Towards Versatile Frequency Comb Generation Open
International audience
View article: Precision LIDAR Using Dual‐Comb Breathing Spectra
Precision LIDAR Using Dual‐Comb Breathing Spectra Open
Light detection and ranging (Lidar) is indispensable in a variety of fields, encompassing basic science, manufacturing, production, and daily life. Here, from a different perspective, A phenomenon is observed occurring between the optical …
View article: Exploiting Nonlocal Correlations for Dispersion-Resilient Quantum Communications
Exploiting Nonlocal Correlations for Dispersion-Resilient Quantum Communications Open
Encoding quantum information via time-bin entangled states has had a profound impact on the development of quantum communications. However, dispersive propagation limits their achievable transmission distances. Here we describe a regime fo…
View article: Topological Quenching of Noise in a Free-Running Moebius Microcomb
Topological Quenching of Noise in a Free-Running Moebius Microcomb Open
Microcombs require ultralow-noise repetition rates to enable next-generation applications in metrology, high-speed communications, microwave photonics, and sensing, where spectral purity is a central performance metric. Best-performing sou…
View article: Dual-pumping supercontinuum generation and temporal reflection in a nonlinear photonic integrated circuit
Dual-pumping supercontinuum generation and temporal reflection in a nonlinear photonic integrated circuit Open
We report on the first demonstration of on-chip supercontinuum generation through dual-wavelength pumping of a nonlinear photonic integrated circuit, fabricated from high-index doped silica glass. In addition to the bandwidth enhancement t…
View article: Dual-pumping supercontinuum generation and temporal reflection in a nonlinear photonic integrated circuit
Dual-pumping supercontinuum generation and temporal reflection in a nonlinear photonic integrated circuit Open
We report on the first demonstration of on-chip supercontinuum generation through dual-wavelength pumping of a nonlinear photonic integrated circuit, fabricated from high-index doped silica glass. In addition to the bandwidth enhancement t…
View article: Turnkey Deterministic Soliton Crystal Generation
Turnkey Deterministic Soliton Crystal Generation Open
The deterministic generation of robust soliton combs is of great importance for the applications of optical frequency combs. As a novel form of microcomb, soliton crystals (SCs) have been shown to have advantages of easy generation, high c…
View article: Response of Spring Phenology to Pre-Seasonal Diurnal Warming in Deciduous Broad-Leaved Forests of Northern China
Response of Spring Phenology to Pre-Seasonal Diurnal Warming in Deciduous Broad-Leaved Forests of Northern China Open
Preseason temperature has always been considered the most critical factor influencing vegetation phenology in the northern hemisphere. While numerous studies have examined the impact of daytime and nighttime warming on vegetation phenology…
View article: Visible Phase‐Locked Microcombs Generation in High‐Index Doped Silica Glass Micro‐Ring Resonators
Visible Phase‐Locked Microcombs Generation in High‐Index Doped Silica Glass Micro‐Ring Resonators Open
The development of integrated microcomb in the visible light region attracts considerable interest due to their potential applications ranging from bioimaging to quantum systems. However, apart from the handful of reports of phase‐locked m…
View article: Multi-channel Hong–Ou–Mandle interference between independent comb-based weak coherent pulses
Multi-channel Hong–Ou–Mandle interference between independent comb-based weak coherent pulses Open
With the widespread application of quantum communication technology, there is an urgent need to enhance unconditionally secure key rates and capacity. Measurement-device-independent quantum key distribution (MDI-QKD), proven to be immune t…
View article: Supercontinuum generation in high-index doped silica photonic integrated circuits under diverse pumping settings
Supercontinuum generation in high-index doped silica photonic integrated circuits under diverse pumping settings Open
Recent advances in supercontinuum light generation have been remarkable, particularly in the context of highly nonlinear photonic integrated waveguides. In this study, we thoroughly investigate supercontinuum (SC) generation in high-index …
View article: Review of Optical Fiber Optofluidic Chemical Sensors and Biosensors
Review of Optical Fiber Optofluidic Chemical Sensors and Biosensors Open
Optical fiber sensors have gained significant attention in recent years owing to their remarkable advantages of remote operation and rapid response. The integration of optical fiber sensing with the microfluidics technology has paved the w…
View article: Advances in Soliton Crystal Microcombs
Advances in Soliton Crystal Microcombs Open
Soliton crystal microcombs, as a new type of Kerr frequency comb, offer advantages such as higher energy conversion efficiency and a simpler generation mechanism compared to those of traditional soliton microcombs. They have a wide range o…
View article: Turnkey deterministic soliton crystal generation
Turnkey deterministic soliton crystal generation Open
The deterministic generation of robust soliton comb has significant meaning for the optical frequency combs to be widely used in various applications. As a novel form of microcomb, Soliton crystal holds the advantages of easy generation, h…