Shanghai Institute of Optics and Fine Mechanics

Practical distributed 3D hydro-acoustic localization technology for spatially heterogeneous response cables with adaptive multi-array fusion

Distributed optical fiber hydro-acoustic localization holds significant importance in underwater object detection, maritime security, and marine ecology monitoring. To address the practical challenge of spatial heterogeneity response of acoustic sensitive optical cable (ASOC), a...

Form Measurement of a 300 mm Ellipsoidal Binary Grating Using a Spatio-Temporal Fourier Method

Abstract For conventional laser Fizeau phase-shifting interferometry, form measurement of ellipsoidal binary gratings remains challenging because of the discontinuous grating structure with groove depths exceeding half the illumination wavelength. In this study, we propose a spat...

A nuclear clock synchronized to 229Th

Abstract Atomic clocks have made time and frequency the most precisely measured quantities in physics, progressing from microwave standards that realize the SI second 1 to optical clocks with unprecedented precision 2 . A nuclear clock transfers the frequency reference from an el...

1200 lines/mm Gold-Coated pulse compression grating for 850–970 nm

The structural parameters and spectral performance of the pulse compression gratings are directly related to the design and output quality of high-power laser systems. In this paper, for the gold-coated gratings applicable to the 850–970 nm wavelength range, the effects of variat...

Solid-state NMR insight into cation-modulated network structure and chemical durability of phosphate nuclear waste glasses

Phosphate glasses are extensively explored for nuclear waste vitrification. However, a full, systematic understanding of the mechanisms controlling their chemical durability is still lacking. Based on the similar ionic radii and matching valence states of Zn 2+ /Ga 3+ and Fe 2+ /...

A comprehensive review of an artificial intelligence-based framework for classifying and solving modified heat partial differential equations

Partial differential equations (PDEs) fundamentally describe the dynamic relationships among physical quantities and therefore play an essential role in modelling physical processes such as heat transfer, fluid flow, population dynamics, and material behavior, unlike purely algeb...

High-power tunable laser operation of Ho:YScO 3 crystal at 2.1 µm

We report the Czochralski growth, spectroscopic characterization, and laser performance at 2.1 µm of a Ho:YScO 3 mixed sesquioxide crystal with a doping concentration of 0.4 at.%. Spectroscopic evaluation was performed based on room-temperature absorption and fluorescence measure...

Probing Internal Dynamics of Spatiotemporal Optical Vortex Strings: Spatiotemporal Attraction and Filament Stretching

ABSTRACT Vortex dynamics are intriguing and challenging across multiple physics fields. In optics, customized spatiotemporally structured optical fields, especially spatiotemporal optical vortices (STOV), offer the potential to tailor light via coupled space‐time degrees of freed...

Multi‐Objective Inverse Design of a Dual‐Narrowband Thermal Emitter for Optical Gas Sensing

ABSTRACT Spectrally selective narrowband thermal emitters with high‐temperature stability are critical infrared sources for advanced gas sensing. However, conventional Tamm‐plasmon narrowband thermal emitters are commonly implemented as distributed Bragg reflectors on thin metal...

How surface governs vibration-induced degradation of glass Structure: A view from molecular dynamics

Silica glass, renowned for its exceptional thermal stability and mechanical strength, is widely used in optics, manufacturing, and aerospace. However, the mechanisms underlying its structural degradation under external vibrational fields is still rare due to the inherent disorder...

Coupling refining and modification effects of Sr, Mn, and Al-V-Ti-B on microstructure of Al-7Si-0.25Fe alloy

Al-Si alloys are widely used in aerospace and automotive industries due to their high specific strength and low cost. Their mechanical performance is closely related to the grain size of the α-Al matrix and the morphologies of secondary phases such as eutectic Si and Fe-containin...

Sn–Pb Perovskite Laser Wireless Power Transfer for Medical Implants: A Perspective

ABSTRACT As global precision medicine advances toward chronic disease management and active health intervention, implantable medical devices are evolving from passive monitors into active therapeutic platforms. While subcutaneous bioelectronics, exemplified by pacemakers, are cor...

Femtosecond laser modification of LPCVD-SiN photonic devices: microstructural evolution and post-fabrication trimming

Femtosecond laser processing provides a localized and contactless approach for permanent post-fabrication trimming of integrated photonic devices. Here, we investigate dose-dependent microstructural evolution in low-pressure chemical vapor deposition silicon nitride (LPCVD-SiN) a...

Infrared quantum emission and its tuning from boron-nitride nanotube fluors

Point-defected 2-D hBN based quantum light sources are highly regarded as promising candidates for emerging quantum photonic technologies. However, achieving tunable defect-induced optical emission within the infrared telecommunication window for low-loss, long-distance quantum c...

An Optically Transparent Metamaterial Window Based on Metal Meshes With Integrated Absorption and Transmission

ABSTRACT This work presents an absorptive–transmissive integrated metamaterial window using a quartz substrate and micrometer‐scale metallic meshes. The structure employs a three‐layer design comprising a resonant layer, a dielectric spacer, and a frequency‐selective surface. It...

LIBS-Based Classification of Thermal Aging Levels in High-Voltage Wire Harnesses of New Energy Vehicles Using MAD-RF

High-voltage wiring harnesses in new energy vehicles (NEVs) are susceptible to thermal aging in high-temperature environments, whereas conventional assessment methods are difficult to deploy rapidly. This study combines laser-induced breakdown spectroscopy (LIBS) with random fore...

CO2 laser processing of fused silica: a review of mechanisms, defect control and functionalization

Fused silica optics are critical components in inertial confinement fusion facilities, where they are exposed to intense ultraviolet laser radiation. However, processing induced subsurface defects serve as laser damage precursors, severely degrading the laser-induced damage thres...

Simultaneous Ce Ion Doping in Core and Cladding to Enhance the Radiation Resistance of Erbium-Doped Fibers

Erbium-doped fibers (EDFs) suffer from radiation-induced absorption (RIA) and radiation-induced gain variation (RIGV) under ionizing radiation, which limit their applications in space optical communication systems. To address this issue, a novel core–cladding Ce co-doped fiber is...