High-sensitivity simultaneously distributed acoustic and temperature sensing by an air-ring microstructured optical fiber [0.03%]
高灵敏度分布式声波及温度同时传感的空气环微结构光纤
Jialong Li,Huanhuan Liu,Yihong Xiao et al.
Jialong Li et al.
The sensing fiber plays a critical role in distributed acoustic sensing (DAS) as it functions as a transducer, converting external acoustic signals into optical signals that can be detected and measured. However, temperature variations sign...
Simultaneous optical power delivery and distributed BOTDR sensing through cross-band wavelength multiplexing over a fiber link [0.03%]
基于跨频带波长复用的光纤链路的光功率传输与分布式BOTDR传感
Tianye Huang,Lu Guo,Xinyu Wang et al.
Tianye Huang et al.
Optical fibers offer significant advantages in both power delivery and distributed sensing. In remote areas where stable power supply is not easy to access, distributed optical fiber sensing (DOFS), which offers long-distance monitoring cap...
Shuang Liu,Chunzheng Bai,Bing Gu et al.
Shuang Liu et al.
It is an effective strategy for enhancing the nonlinear optical response of materials to construct multilayer film structures. A periodic SnS2/TiO2 optical multilayer structure based on SnS2 nanosheets and its nonlinear optical properties a...
Thermal locking-based optical parametric oscillation: noise suppression in a WGM cavity [0.03%]
基于热锁定的光学参量振荡：WGM腔中噪声抑制
Xinjie Han,Yong Geng,Kun Qiu et al.
Xinjie Han et al.
We propose a frequency stabilization system based on thermal locking, utilizing the thermo-optic effect in a whispering gallery mode (WGM) resonator. By coupling the WGM resonator with an ultra-stable laser, low-frequency noise can be stabl...
Yian Huang,Huazhen Liu,Lin Li et al.
Yian Huang et al.
Extended depth of field (EDOF) achieves high-resolution 3D microscopic measurement by multi-focus imaging and is widely applied in industrial inspection and biomedical research. However, the inherent trade-off between depth of field and lat...
Generation of high-energy picosecond pulses in an Yb-doped fiber oscillator with enhanced grating compressors [0.03%]
改进光栅压缩器的掺镱光纤振荡器中的高能量皮秒脉冲产生
Chenran Sha,Chunlei Li,Fanglin Chen et al.
Chenran Sha et al.
We report on the generation of high-energy picosecond pulses in an Yb-doped single-mode fiber oscillator with enhanced grating compressors. Inserting two lenses in a pair of gratings, the spectral chirp of the optical pulses could be enlarg...
Deep optics framework utilizing a liquid crystal microlens array for dynamic wavefront sensing and correction in atmospheric turbulence [0.03%]
利用液晶微透镜阵列进行大气湍流中动态波前检测与矫正的深度光学框架
Xiaoyue Song,Hui Li,Zikang Li et al.
Xiaoyue Song et al.
Anisotropic atmospheric turbulence, which distorts wavefronts, poses challenges to advancements in fields such as astronomy and remote sensing. Existing reconstruction methods often fail to adequately capture its spatiotemporal variability,...
Zhouyuan Yan,Ivan M Kislyakov,Xun Cao et al.
Zhouyuan Yan et al.
A vanadium dioxide (VO2) film on glass, when continuously heated to 350 K, exhibits self-focusing and saturable absorption behavior toward femtosecond radiation in the near-infrared range, indicative of an electronic response rather than a ...
Bandwidth-enhanced LFM signal generation by period-one dynamics in a directly modulated semiconductor laser [0.03%]
基于半导体激光器周期一动力学的带宽增强线性调频信号产生方法研究
Gengze Wu,Fangzheng Zhang,Xiaoyue Yu et al.
Gengze Wu et al.
Period-one (P1) laser dynamics provide effective methods for radar signal generation. However, the linearly frequency-modulated (LFM) signal bandwidth generated by P1 dynamics is constrained by the limited variation range of the injection s...
D L Voronov,S Park,A Islegen-Wojdyla et al.
D L Voronov et al.
We demonstrate fabrication of an ultra-low blaze angle (LBA) grating designed for time-resolved spectroscopy in the x-ray region. A blaze angle of 0.12° was achieved by the groove depth reduction process providing a perfect saw-tooth shape...