Shixun Dai
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View article: Ultra-narrow linewidth 1.6 µm single-longitudinal-mode fiber laser enabled by a hybrid saturable absorber filter and distributed Rayleigh feedback
Ultra-narrow linewidth 1.6 µm single-longitudinal-mode fiber laser enabled by a hybrid saturable absorber filter and distributed Rayleigh feedback Open
We demonstrate a 1.6 µm single-longitudinal-mode (SLM) fiber laser achieving an ultra-narrow linewidth of 185 Hz, enabled by a hybrid approach combining a saturable absorber filter (SAF) and distributed Rayleigh feedback (DRF). An optimize…
View article: Gradient refractive index chalcogenide lens for lightweight infrared dual-band imaging systems
Gradient refractive index chalcogenide lens for lightweight infrared dual-band imaging systems Open
In this study, we report the development of Ge 15 Se 85−x Te x (GSTx) chalcogenide glass-based gradient refractive index (GRIN) lenses for lightweight dual-band infrared imaging systems. The GSTx glasses exhibit compatible thermal properti…
View article: Color Mechanism of Blue Myanmar Jadeite Jade: The Role of Trace Elements and Mineralogical Characteristics
Color Mechanism of Blue Myanmar Jadeite Jade: The Role of Trace Elements and Mineralogical Characteristics Open
Myanmar blue jadeite jade is a rare and highly prized gemstone, yet its coloration and formative mechanisms remain poorly understood. In this study, petrographic analysis, ultraviolet–visible (UV–Vis) spectroscopy, electron probe microanal…
View article: Non-equivalent interchange between acousto-optic performance and laser damage resistance in an eco-friendly Ge-Sn-Se-S quaternary chalcogenide glass system
Non-equivalent interchange between acousto-optic performance and laser damage resistance in an eco-friendly Ge-Sn-Se-S quaternary chalcogenide glass system Open
The design and development of high-performance acousto-optic materials are driving the large-scale application of acousto-optic modulation technology in key fields such as optical communication and laser radar. Although commercial chalcoge…
View article: Femtosecond-Laser-Inscribed Dual-Resonance LPFG Biosensor for Ultrasensitive (1nM) Aflatoxin B1 Screening in Food
Femtosecond-Laser-Inscribed Dual-Resonance LPFG Biosensor for Ultrasensitive (1nM) Aflatoxin B1 Screening in Food Open
Food safety monitoring demands rapid and sensitive aflatoxin detection technologies that surpass current national standards (10⁻⁸ mol/L). Here we report a femtosecond-laser-Inscribed dual-resonance LPFG biosensor achieving 1nM(10⁻ 9 mol/L)…
View article: Real-Time Compensatory Mode Control within Few-Mode Fibers based on Adaptive Spatial Light Modulation
Real-Time Compensatory Mode Control within Few-Mode Fibers based on Adaptive Spatial Light Modulation Open
Few-mode fibers (FMFs) have garnered significant attention in mode-division multiplexing (MDM) systems due to their parallel mode transmission capability. To achieve efficient mode control and characterization of FMFs, we present an adapti…
View article: Compact and low-crosstalk silicon-based polarization-insensitive multi-channel and multi-mode waveguide crossing
Compact and low-crosstalk silicon-based polarization-insensitive multi-channel and multi-mode waveguide crossing Open
A silicon-based polarization-insensitive multi-channel and multi-mode waveguide crossing is presented, optimized, and validated experimentally in this paper. The device structure is optimized to achieve polarization insensitivity, compact …
View article: Highly Selective Decarboxylative Dimerization via Molecular Self-Assembly-Induced Confinement Effects
Highly Selective Decarboxylative Dimerization via Molecular Self-Assembly-Induced Confinement Effects Open
On-surface synthesis of specified products with high selectivity represents a powerful approach to fabricate functional materials. The regulation of selectivity has always been a focal point of interest, and a diverse of methods are utiliz…
View article: On-Surface Synthesis of Porphyrin Nanoribbons via Cycloaromatization of Isopropyl Substituents on Au(111)
On-Surface Synthesis of Porphyrin Nanoribbons via Cycloaromatization of Isopropyl Substituents on Au(111) Open
We report the surface-mediated synthesis of quasi-one-dimensional (quasi-1D) porphyrin nanoribbons (PNRs) via a hierarchical process involving: (i) [3+3] cycloaromatization of isopropyl substituents, (ii) intramolecular cyclodehydrogenatio…
View article: Optimization of nonlinear effect suppression in gain-switched Raman fiber lasers for enhanced SRS conversion efficiency
Optimization of nonlinear effect suppression in gain-switched Raman fiber lasers for enhanced SRS conversion efficiency Open
This work establishes a comprehensive framework for nonlinear suppression in gain-switched Raman fiber lasers (RFLs) through dispersion-engineered fibers and spectral control strategies. Combining numerical modeling with experimental valid…
View article: Unlocking body-surface physiological evolution via IR-temperature dual sensing with single chalcogenide fiber
Unlocking body-surface physiological evolution via IR-temperature dual sensing with single chalcogenide fiber Open
Improvements to body-surface physiological monitoring ability including real-time, accuracy and integration, are essential to meet the expansive demands for personal healthcare. As part of this, simultaneous monitoring of sweat metabolites…
View article: Fabrication and performance study of high coupling efficiency side-pump coupler based on fluorotellurite glass fiber
Fabrication and performance study of high coupling efficiency side-pump coupler based on fluorotellurite glass fiber Open
We demonstrate the fabrication of side-pump coupler with high coupling efficiency using low-loss, homemade fluorotellurite glass fiber for the first time. Benefiting from the optimization of pump fiber waist diameter and winding turns, the…
View article: Superior nonlinear optical performance of CsPbBr<sub>3</sub> all-inorganic metal halide perovskite nano-crystals embedded Ge<sub>2</sub>S<sub>3</sub> chalcogenide glass
Superior nonlinear optical performance of CsPbBr<sub>3</sub> all-inorganic metal halide perovskite nano-crystals embedded Ge<sub>2</sub>S<sub>3</sub> chalcogenide glass Open
In this work, we synthesized a novel optical functional nanocomposite material by incorporating all-inorganic metal halide perovskite (MHP, CsPbBr 3 ) nano-crystals to Ge 2 S 3 chalcogenide glass (ChG), and discovered their superior nonlin…
View article: A mid-infrared Brillouin laser using ultra-high-Q on-chip resonators
A mid-infrared Brillouin laser using ultra-high-Q on-chip resonators Open
Ultra-high-Q optical resonators have facilitated advancements in on-chip photonics by harnessing nonlinear functionalities. While these breakthroughs, primarily focused on the near-infrared region, have extended interest to longer waveleng…
View article: Low-threshold broadband-tunable cascaded Raman fiber laser at 2.3 μm based on highly GeO<sub>2</sub>-doped silica and As<sub>2</sub>S<sub>3</sub> fibers
Low-threshold broadband-tunable cascaded Raman fiber laser at 2.3 μm based on highly GeO<sub>2</sub>-doped silica and As<sub>2</sub>S<sub>3</sub> fibers Open
We demonstrate a low-threshold, broadband-tunable cascaded Raman fiber pulsed laser utilizing highly GeO 2 -doped silica and As 2 S 3 fibers as Raman gain media. As a result of the high Raman spectral purity of the first-order Raman laser …
View article: Large-scale As-Sb-S chalcogenide glasses with ultrahigh gradient refractive index
Large-scale As-Sb-S chalcogenide glasses with ultrahigh gradient refractive index Open
Gradient refractive index (GRIN) infrared lens provided additional degrees of freedom for correcting chromatic and spherical aberrations in optical design by combining an internally customized refractive index distribution with the surface…
View article: Enhanced acousto-optic properties at 1.55 µm wavelength from (As<sub>2</sub>S<sub>3</sub>)<sub>100-x</sub>(Te<sub>2</sub>S<sub>3</sub>)<sub>x</sub> chalcogenide glasses via tailoring of the network structure
Enhanced acousto-optic properties at 1.55 µm wavelength from (As<sub>2</sub>S<sub>3</sub>)<sub>100-x</sub>(Te<sub>2</sub>S<sub>3</sub>)<sub>x</sub> chalcogenide glasses via tailoring of the network structure Open
Chalcogenide glasses (ChGs) attract attention for their excellent acousto-optic (AO) properties and broad applications in optical information processing. Te-based ChGs often have a high refractive index and large glass-forming region, suit…
View article: Fabrication and performance of high refractive index achromatic gradient index chalcogenide glass
Fabrication and performance of high refractive index achromatic gradient index chalcogenide glass Open
Gradient index (GRIN) glasses utilize a specially tailored internal refractive index combined with the designed surface curvature of the optical element to enhance the correction of chromatic and spherical aberration. Additionally, GRIN te…
View article: Enhancing the Optical Performance of Mid-Infrared Chalcogenide Glass Through Liquid Coating
Enhancing the Optical Performance of Mid-Infrared Chalcogenide Glass Through Liquid Coating Open
Laser induced damage to optical component surfaces poses a critical challenge in the development of high-power laser systems. Such damage is typically influenced by its material host, defect distribution, laser parameters, and environmenta…
View article: Humidity Sensor Based on a Hollow Core Fiber Anti-Resonant Reflection Optical Waveguide
Humidity Sensor Based on a Hollow Core Fiber Anti-Resonant Reflection Optical Waveguide Open
In this paper, a graphene oxide (GO) composite film-coated humidity sensor is proposed based on the hollow core fiber (HCF). A segment of the HCF is spliced between two segments of the single-mode fiber (SMF). The relative humidity (RH) se…
View article: Low-threshold dual-polarization electro-optic nonlinear activation functions
Low-threshold dual-polarization electro-optic nonlinear activation functions Open
In this paper, a scheme for realizing low-threshold dual-polarization electro-optic nonlinear activation functions is proposed, designed, and experimentally demonstrated. This scheme relies on a structure composed of an optical power split…
View article: Impacts of hydroxyl and bond energy on laser‐induced damage in mid‐infrared chalcogenide glass
Impacts of hydroxyl and bond energy on laser‐induced damage in mid‐infrared chalcogenide glass Open
Mid‐infrared chalcogenide glasses often suffer from a low laser damage threshold due to their weak bond energy and the presence of impurities, particularly at the specific wavelength of 2.94 µm, which is widely used in medical applications…
View article: Quasi-bound states in the continuum with stable dual-resonance wavelengths in mid-infrared metasurface for ultrasensitive refractive index sensing and molecular vibrations of strong coupling
Quasi-bound states in the continuum with stable dual-resonance wavelengths in mid-infrared metasurface for ultrasensitive refractive index sensing and molecular vibrations of strong coupling Open
In this paper, a dual-resonances mid-infrared all-dielectric metasurface sensor based on asymmetric cross dimer, which is driven by quasi-bound states in the continuum (QBIC), is proposed and investigated. The metasurface sensor maintains …
View article: Enhancement of far-infrared laser damage threshold in Ge-As-Se glass fiber
Enhancement of far-infrared laser damage threshold in Ge-As-Se glass fiber Open
The application of As-Se chalcogenide glasses in high-power laser delivery is hindered by their low damage threshold due to their weak chemical bonds. To solve this, we introduced germanium elements into the As-Se glasses and optimized the…
View article: Detection of riboflavin concentration by sol-gel silica coated dual-peak long period fiber grating sensor
Detection of riboflavin concentration by sol-gel silica coated dual-peak long period fiber grating sensor Open
A dual-peak long period fiber grating (DP-LPFG)-based sensor was designed and fabricated for the sensitive detection of riboflavin concentration. LPFGs with a period of 163 μ m and a cladding mode of LP 0, 12 were inscribed on a standard s…