Enhancing frequency accuracy of linear frequency-modulated BOTDR using Richardson-Lucy deconvolution [0.03%]
基于理查森-卢西算法的线性频率调制BOTDR频域解卷积及精度提升方法
LiHuang Li,Jiageng Chen,Yang Zhang et al.
LiHuang Li et al.
In Brillouin optical time-domain reflectometry (BOTDR), linear frequency-modulated (LFM) pump pulses have been employed to achieve rapid measurements. However, the linear frequency-time mapping is valid only within the pulse width, which co...
High-power U-band femtosecond laser pulses generated by nonlinear optical gain modulation [0.03%]
高功率微波频段飞秒激光脉冲的非线性光学增益调制产生
Shaowei Huang,Zhi Cheng,Xinru Cao et al.
Shaowei Huang et al.
Ultrafast laser pulses in the 1.62-1.68 μm wavelength range (U-band) hold significant potential for applications such as spectroscopy, optical communication, and bio-imaging. However, it is challenging to generate high-energy, high-perform...
Holistic form reconstruction based on a nonlinear 3D zonal grid model in stereoscopic deflectrometry [0.03%]
基于立体光度测量的非线性三维区域网格模型的整体形态重构方法研究
Zhenyi Chen,Qican Zhang,Wenchuan Zhao et al.
Zhenyi Chen et al.
Phase measuring deflectrometry (PMD) is extensively used to measure the specular surfaces. Stereo-PMD can address the height-slope ambiguity problem, but it remains the error propagation and accumulation in traditional stepwise reconstructi...
Guidong Zhang,Shiye Li,Zaoming Huang et al.
Guidong Zhang et al.
In this Letter, we propose a power-switch-free (PSF) DC-AC photonic power converter (PPC) that utilizes liquid-crystal optical modulators (LCOMs) to commutate optical flux, thereby eliminating the need for power switches and avoiding switch...
Low-loss waveguide bend for compact and broadband photonic integrated circuits [0.03%]
一种低插损弯波导及其在光子集成电路中的应用
Jiahong Chen,Zhiyuan Zheng,Chongfu Zhang
Jiahong Chen
We propose and demonstrate a low-loss, wavelength-insensitive waveguide bend via a silica-on-silicon delay line with a footprint of 10 mm × 7.5 mm. The bending loss of the 90∘ Bloss and arc hybrid bend was simulated and compared to that o...
Mathematical method for designing phase-shifted fiber Bragg gratings for nanoscale strain measurement in high-stability satellite structures [0.03%]
用于高稳定性卫星结构纳米应变测量的相移型光纤布拉格光栅的设计方法研究
Zaibo Cheng,Wenxuan Li,Runduo Song et al.
Zaibo Cheng et al.
Phase-shifted fiber Bragg gratings (PSFBGs) are promising for in-orbit nanoscale strain monitoring in high-stability satellite structures. However, conventional designs are constrained by a fundamental tradeoff between high strain resolutio...
Two-axis electromagnetic fast steering MEMS micromirror with a 10-mm-large aperture for satellite communications [0.03%]
一种大孔径二维电磁快速转向微机电系统MEMS反射镜用于卫星通信
Menglin Chen,Chenyao Zhu,Yingchao Cao et al.
Menglin Chen et al.
Microelectromechanical system (MEMS) technology has been exploited to miniaturize fast steering mirrors (FSMs) for free space laser communications between satellites. However, fast steering MEMS mirrors (FSMMs) face tradeoffs among the opti...
Numerical super-oscillatory filtering for sub-diffraction optical imaging [0.03%]
数值超振荡滤波在次衍射光学成像中的应用
Yitian Liu,George V Eleftheriades
Yitian Liu
Super-oscillatory (SO) imaging is a far-field imaging technique to super-resolve unlabeled objects. Previous theoretical and simulation-based studies have shown attractive possibilities to simplify the SO imaging configuration by implementi...
Qing Yan,Lei Yu,Liwei Wang et al.
Qing Yan et al.
An ultrabroad instantaneous frequency measurement (IFM) scheme based on a Brillouin fiber laser (BFL) is proposed and experimentally demonstrated. The BFL is constructed using a Mach-Zehnder intensity modulator and an unpumped erbium-doped ...
Over 100 million Q silicon nitride Fabry-Perot Bragg nanoresonators enabled by advanced tapered gratings [0.03%]
一种基于先进锥形光栅的千万量级氮化硅法布里-珀罗纳米谐振腔的制造技术
Yang Zhang,Masoud Heidari Khouzani,ChengDao Yu et al.
Yang Zhang et al.
We report new, to the best of our knowledge, advances in Fabry-Perot Bragg grating nanoresonators on low-loss silicon nitride (Si3N4). Building on a previous demonstration of an intrinsic quality factor Qin of 19.3 million with 1.4 dB/m pro...