Denoising algorithm of Φ-OTDR systems based on adaptive fractional wavelet transform denoising [0.03%]
基于自适应分数阶小波变换的Φ-OTDR系统信号降噪算法研究
Jiayao Sun,Deyu Xu,Jingming Zhang et al.
Jiayao Sun et al.
An adaptive, and what we believe to be, novel fractional wavelet transform (NFRWT)-based denoising method is proposed for background-noise suppression and signal-to-noise ratio (SNR) enhancement of phase-sensitive optical time-domain reflec...
Millisecond photon-to-photon latency and high-speed volumetric projection system for optogenetics [0.03%]
用于光遗传学的毫秒级光子到光子延迟和高速体积投影系统
Xiao Zhang,Toya Fujita,Hiromasa Oku
Xiao Zhang
Stimulating motile specimens via optogenetics requires high-speed light pattern modulation and projection to track target motion with millisecond-scale low latency. Although a millisecond-latency microscopic projection system has been repor...
Polarization-encoded coaxial structured light for high-precision 3D surface profilometry [0.03%]
用于高精度三维表面形貌测量的偏振编码同轴结构光方法
Huachao Cheng,Teli Xi,Haijin Guo et al.
Huachao Cheng et al.
Traditional three-dimensional imaging techniques, such as structured light profilometry or confocal microscopy, have limitations in terms of imaging speed, system complexity, or adaptability to weak texture samples. To overcome these limita...
Discrete freeform optical design based on collaborative optimization of point cloud and local normals [0.03%]
基于点云及局部法线协作优化的离散自由曲面光学设计
Haisheng Feng,Su Wu,Yang Lu et al.
Haisheng Feng et al.
This paper proposes a freeform optical design method based on collaborative optimization of point clouds and normals. The method represents the freeform surface as a discrete point cloud with local normal information, and realizes collabora...
Ultrafast ghost imaging with 25 GHz speckle switching and wavelength-division multiplexing [0.03%]
基于GHz级散斑切换和波分复用的超快鬼成像
Shin Motooka,Noriki Komori,Tomoaki Niiyama et al.
Shin Motooka et al.
Ghost imaging (GI) and single-pixel imaging (SPI) enable image reconstruction without spatially resolved detectors, offering access to broad spectral ranges and challenging imaging environments. However, their adoption has been fundamentall...
Atomic vapor cells fabricated by femtosecond laser welding of standard-optical-quality glass [0.03%]
飞秒激光焊接光学玻璃原子蒸气单元细胞
Dirk Nodop,Tim Kügler,Jan Rücker et al.
Dirk Nodop et al.
A simple two-step method produces quasi-monolithic all-glass atomic vapor cells. First, optical contact bonding of standard-optical-quality glass components under vacuum or buffer-gas atmosphere achieves initial hermetic sealing at room tem...
Range-resolved water temperature measurement using Raman LiDAR with multiplexed excitation [0.03%]
基于复用激励拉曼lidar的分层水温测量方法研究
O Kitzler,C J Taylor,Z Li et al.
O Kitzler et al.
We present the remote measurement of temperature vs length profiles in up to 50 m of clear (swimming pool) water. A pair of blue gallium-nitride laser diodes, with wavelengths separated by 4 nm, was multiplexed in time as the excitation sou...
Normal transmission via plasmon-polariton coupling in anisotropic hyperbolic dispersive media under wide critical-angle incidence [0.03%]
各向异性双曲色散媒质宽临界角入射偶极子的正常传输及等离子激元极化子耦合效应
Linli Bao,Yuheng Shen,Hao Wang et al.
Linli Bao et al.
Our paper reports on a layered hyperbolic metamaterial (HMM) composed of alternating Ag/TiO2 films, designed to achieve high ultraviolet (UV) transmittance with large critical-angle guiding. The multilayer exhibits hyperbolic iso-frequency ...
Hollow cubic-phase modulated radial coherent beam propagation in atmospheric turbulence: emission efficiency and echo enhancement with Cassegrain systems [0.03%]
中空立方相位调制径向相干光束在大气湍流中的传输：发射效率及卡塞格林系统的回波增强效应
Jinhao Wang,Jiahao Bai,Yuyang Tan et al.
Jinhao Wang et al.
Addressing challenges in Cassegrain systems, including emission efficiency reduction due to central obstruction by secondary mirror and beam distortion caused by atmospheric turbulence, this study proposes the use of disturbance-resistant c...
Zhiqiang Wen,Qiu Tu,Qiurong Yan et al.
Zhiqiang Wen et al.
Single-pixel imaging is a technique that utilizes spatial light modulation and a single-point detector to reconstruct images through computational methods. However, under ultra-low measurement rates, existing reconstruction methods still fa...