Weibiao Chen
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View article: Spaceborne high-spectral-resolution lidar ACDL/DQ-1 measurement and validation of aerosol optical properties in 2023 Canadian wildfire smoke
Spaceborne high-spectral-resolution lidar ACDL/DQ-1 measurement and validation of aerosol optical properties in 2023 Canadian wildfire smoke Open
View article: Enhanced second-harmonic generation with four-wave-mixing broadened fundamental laser
Enhanced second-harmonic generation with four-wave-mixing broadened fundamental laser Open
Single-pass second-harmonic generation (SHG) of a phase-modulated fiber laser is an effective scheme for high-power, continuous-wave, narrow-linewidth visible laser generation. However, this approach encounters difficulties in improving co…
View article: Pulsed heterodyne Brillouin microscopy enables high-specificity, low-phototoxicity biomechanical imaging with single-ended access
Pulsed heterodyne Brillouin microscopy enables high-specificity, low-phototoxicity biomechanical imaging with single-ended access Open
Brillouin microscopy (BM) enables three-dimensional, non-contact viscoelastic imaging with high spatial resolution. Since its introduction in 2008, different BM modalities have balanced accessibility and spectral performance. Spontaneous B…
View article: Demonstration of a silicon photonics integrated 1645 nm stabilized seed laser for methane and water vapor remote sensing lidar
Demonstration of a silicon photonics integrated 1645 nm stabilized seed laser for methane and water vapor remote sensing lidar Open
The frequency-stabilized laser (FSL) is a vital component of differential absorption lidar (DIAL) and can satisfy the requirements for high-precision gas species concentration detection. China’s next-generation spaceborne integrated-path d…
View article: Retrievals of vertically resolved aerosol microphysical particle parameters with regularization from spaceborne Aerosol and Carbon dioxide Detection Lidar (ACDL)
Retrievals of vertically resolved aerosol microphysical particle parameters with regularization from spaceborne Aerosol and Carbon dioxide Detection Lidar (ACDL) Open
Using an improved regularization method, we attempt to derive microphysical parameters (effective radius 𝑟𝑒𝑓𝑓, surface area concentration 𝑆𝑡, volume concentration 𝑉𝑡) of aerosol particle size distribution directly from the detection result…
View article: To explore the potential of LOXL2 as a biomarker in glioma and construct a genomic integrated clinical prognostic model
To explore the potential of LOXL2 as a biomarker in glioma and construct a genomic integrated clinical prognostic model Open
Background Glioma is a common invasive tumor of the central nervous system, and its pathological features significantly impair the quality of life of patients, with high mortality risk and easy recurrence. For glioma Lysine Oxidase 2(LOXL2…
View article: Stimulated Brillouin scattering microscopy with a high-peak-power 780-nm pulsed laser system
Stimulated Brillouin scattering microscopy with a high-peak-power 780-nm pulsed laser system Open
View article: High performance mode (de)multiplexer assisted with a microring resonator on the lithium niobate-on-insulator platform
High performance mode (de)multiplexer assisted with a microring resonator on the lithium niobate-on-insulator platform Open
The high extinction ratio mode (de)multiplexer is a pivotal component in high capacity mode-division multiplexing data communication and nascent on-chip intermodal acousto-optic modulators. Up to now, high performance on-chip mode (de)mult…
View article: Estimation of diurnal emissions of CO <sub>2</sub> from thermal power plants using spaceborne integrated path differential absorption (IPDA) lidar
Estimation of diurnal emissions of CO <sub>2</sub> from thermal power plants using spaceborne integrated path differential absorption (IPDA) lidar Open
Coal-fired power plants are a major source of global carbon emissions, and accurately accounting for these significant emission sources is crucial in addressing global warming. Many previous studies have used Gaussian plume models to estim…
View article: Diode-pumped Tm:YLF MOPA system delivering 713 mJ pulse energy with near-diffraction-limited beam quality
Diode-pumped Tm:YLF MOPA system delivering 713 mJ pulse energy with near-diffraction-limited beam quality Open
We present a diode-pumped high-energy Tm:YLF nanosecond MOPA system at 1880nm wavelength. Using a simplified laser amplification process, we analyze the distribution of the upper-level population in the gain medium under different pump dur…
View article: Integrated photonics for space communication and sensing
Integrated photonics for space communication and sensing Open
Integrated photonics takes advantages of size, weight, and power consumption, and can be widely used in space communication and sensing. This paper reviews the typical applications of integrated photonics for space communication and sensin…
View article: ACDL/DQ-1 calibration algorithms – Part 1: Nighttime 532 nm polarization and the high-spectral-resolution channel
ACDL/DQ-1 calibration algorithms – Part 1: Nighttime 532 nm polarization and the high-spectral-resolution channel Open
The Atmospheric Environment Monitoring Satellite (Daqi 1 or DQ-1) was successfully launched in April 2022, with the capability of providing continuous multi-sensor spatial and optical simultaneous observations of carbon dioxide, aerosols, …
View article: High-Precision Joint Ranging Method Based on Pseudo-Random Code and Single-Tone Signal
High-Precision Joint Ranging Method Based on Pseudo-Random Code and Single-Tone Signal Open
In this paper, a laser joint ranging method, which integrates the pseudo-random code with the single-tone signal, is proposed for realizing high accuracy and precision. The single-tone signal utilizes a phase-shift method for high-precisio…
View article: A new maturity recognition algorithm for Xinhui citrus based on improved YOLOv8
A new maturity recognition algorithm for Xinhui citrus based on improved YOLOv8 Open
Current object detection algorithms lack accuracy in detecting citrus maturity color, and feature extraction needs improvement. In automated harvesting, accurate maturity detection reduces waste caused by incorrect evaluations. To address …
View article: In-orbit intersatellite laser communication experiment based on compound-axis tracking
In-orbit intersatellite laser communication experiment based on compound-axis tracking Open
View article: A kilohertz nanosecond 1645 nm KTA-OPO pumped by a 1064 nm pulse laser for methane detection
A kilohertz nanosecond 1645 nm KTA-OPO pumped by a 1064 nm pulse laser for methane detection Open
View article: 50.1 W narrow linewidth Nd:YVO<sub>4</sub> Innoslab nanosecond amplifier at 1064 nm with high efficiency
50.1 W narrow linewidth Nd:YVO<sub>4</sub> Innoslab nanosecond amplifier at 1064 nm with high efficiency Open
A narrow linewidth nanosecond partially end-pumped slab (Innoslab) laser amplifier at 1064 nm has been demonstrated. A 6 W seed at a repetition rate of 10 kHz was amplified to 50.1 W with an absorbed pump power of 163 W, achieving a power …
View article: Evaluating the impact of water vapor for aerosol and carbon dioxide detection lidar CO<sub>2</sub> measurement onboard the atmospheric environment monitoring satellite
Evaluating the impact of water vapor for aerosol and carbon dioxide detection lidar CO<sub>2</sub> measurement onboard the atmospheric environment monitoring satellite Open
Global warming, driven by greenhouse gas emissions from human activities, poses significant environmental challenges. Accurate greenhouse gas measurement data are crucial for effective emission reduction policies and international cooperat…
View article: Ta<sub>2</sub>O<sub>5</sub> 980/1550 nm wavelength multiplexer/demultiplexer based on segmented cascaded multimode interference
Ta<sub>2</sub>O<sub>5</sub> 980/1550 nm wavelength multiplexer/demultiplexer based on segmented cascaded multimode interference Open
On-chip erbium-doped/erbium-ytterbium co-doped waveguide amplifiers (EDWAs/EYCDWAs) have received extensive research attention in recent years. However, there has been relatively little research on integrated wavelength division multiplexi…
View article: Measurement of CO<sub>2</sub> Column Concentration Above Cloud Tops With a Spaceborne IPDA Lidar
Measurement of CO<sub>2</sub> Column Concentration Above Cloud Tops With a Spaceborne IPDA Lidar Open
The Atmospheric Environment Monitoring Satellite (AEMS), launched by China in 2022, was equipped with active remote sensing lidar for carbon monitoring. It adopts the Integrated Path Differential Absorption (IPDA) technology to monitor glo…
View article: Silicon photonics integrated dual-wavelength frequency stabilized laser for spaceborne CO<sub>2</sub> gas measurement LiDAR
Silicon photonics integrated dual-wavelength frequency stabilized laser for spaceborne CO<sub>2</sub> gas measurement LiDAR Open
A silicon photonic integrated chip was designed to further miniaturize the CO 2 gas- gas-measurement LiDAR seed laser. The optical links of the laser frequency stabilization loop (FSL), optical phase-locked loop (OPLL), and thermo-optical …
View article: Estimation of diurnal emissions of CO <sub>2</sub> from thermal power plants using spaceborne IPDA lidar
Estimation of diurnal emissions of CO <sub>2</sub> from thermal power plants using spaceborne IPDA lidar Open
Coal-fired power plants are a major source of global carbon emissions, and accurately accounting for these significant emission sources is crucial in addressing global warming. Many previous studies have used Gaussian plume models to estim…
View article: ACDL/DQ-1 Calibration Algorithms. Part I: Nighttime 532 nm Polarization and High-Spectral-Resolution Channel
ACDL/DQ-1 Calibration Algorithms. Part I: Nighttime 532 nm Polarization and High-Spectral-Resolution Channel Open
The Atmospheric Environment Monitoring Satellite (DQ-1) was successfully launched in April 2022, with the capability of providing continuous multi-sensor spatial and optical simultaneous observations of carbon dioxide, aerosols and clouds.…
View article: Highly accurate absolute optical transfer delay measurement over a long distance assisted by the pulse time signal
Highly accurate absolute optical transfer delay measurement over a long distance assisted by the pulse time signal Open
In this paper, an absolute optical transfer delay measurement method based on pulse time signal, pseudo-random code phase, and microwave phase is proposed. By employing two-stage integer ambiguity resolution, not only can a measurement ran…
View article: Aerosol optical property measurement using the orbiting high-spectral-resolution lidar on board the DQ-1 satellite: retrieval and validation
Aerosol optical property measurement using the orbiting high-spectral-resolution lidar on board the DQ-1 satellite: retrieval and validation Open
The Atmospheric Environment Monitoring Satellite (AEMS), also called Daqi-1 or DQ-1, was launched in April 2022; one of its main payloads is a high-spectral-resolution lidar (HSRL) system. This new system enables the accurate measurements …
View article: 16-Channel Hybrid WDM-PDM-MDM (de) Multiplexer for Multi-Band Large-Capacity Optical Transmission System Based on Thick Si$_{3}$N$_{4}$ Platform
16-Channel Hybrid WDM-PDM-MDM (de) Multiplexer for Multi-Band Large-Capacity Optical Transmission System Based on Thick Si$_{3}$N$_{4}$ Platform Open
We propose a novel design of hybrid multi-band wavelength/polarization/mode (de)multiplexer based on 800 nm thick SiN platform. The 16 channels are enabled by asymmetric rib polarization beam splitters, subwavelength polarization rotators …
View article: High energy, frequency stabilized three-wavelength lasers in space for ACDL on AEMS
High energy, frequency stabilized three-wavelength lasers in space for ACDL on AEMS Open
A high energy, frequency stabilized three-wavelength laser was developed for spaceborne aerosol and Carbon Detection Lidar (ACDL) on Atmospheric Environment Monitoring Satellite (AEMS). The laser utilized fiber-bulk hybrid amplifier and ca…
View article: The high energy spaceborne all-solid-state lasers based on fluid-loop cooling system
The high energy spaceborne all-solid-state lasers based on fluid-loop cooling system Open
We demonstrate a 532.2 nm high-power all-solid-state pulse laser with a repetition rate of 85 Hz, a single pulse energy of 215.8 mJ. The lasers spot size is (3.8, 3.6) mm, and the divergence angle is (0.57, 0.69) mrad. The stable working s…
View article: Design of an on-chip wavelength conversion device assisted by an erbium-ytterbium co-doped waveguide amplifier
Design of an on-chip wavelength conversion device assisted by an erbium-ytterbium co-doped waveguide amplifier Open
In current documented studies, it has been observed that wavelength converters utilizing AlGaAsOI waveguides exhibit suboptimal on-chip wavelength conversion efficiency from the C-band to the 2 μm band, generally falling below −20.0 dB. To…
View article: Reduction of relative intensity noise in a diamond Raman laser
Reduction of relative intensity noise in a diamond Raman laser Open
The relative intensity noise (RIN) characteristics of a continuous-wave diamond Raman laser are investigated for the first time. The results reveal the parasitic stimulated Brillouin scattering (SBS) that usually occurred with higher-order…