Compact-cavity two-dimensional Hermite-Gaussian lasing enabled by birefringence-induced astigmatism [0.03%]
由双折射引起的 astigmatism 实现的紧凑型腔室二维高斯激光
Jianing Li,Yangjun Hu,Quan Sheng et al.
Jianing Li et al.
We report controllable two-dimensional (2D) Hermite-Gaussian (HG) lasing in a compact plano-concave cavity by exploiting the intrinsic birefringence of an a-cut Nd:YVO4 crystal. The birefringence-induced astigmatism provides modal discrimin...
Hongjie Huang,Haofeng Zang,Pei Wang et al.
Hongjie Huang et al.
We propose and demonstrate an on-chip laser that integrates a leaky-wave metasurface (LWM) into a high-Q (Q > 20,000) planar waveguide Fabry-Pérot (FP) resonator to achieve efficient free-space emission and versatile beam control. The LWM,...
High-repetition-rate GaAs-on-SiN mode-locked laser using a Fabry-Pérot cavity [0.03%]
基于法布里-珀罗腔的高重复频率GaAs-on-SiN锁模激光器
Dongbo Wang,Tom Reep,Thi Ngoc Lam Tran et al.
Dongbo Wang et al.
We demonstrate a 23.3 GHz GaAs-on-SiN mode-locked laser heterogeneously integrated on a commercial SiN platform using micro-transfer printing. A compact Fabry-Pérot cavity with a central saturable absorber enables colliding-pulse, second-h...
Phase-wrapping-free terahertz in-line digital holography via projected refractive index [0.03%]
基于投影折射率的无相位混叠太赫兹数字全息法
Feifan Fan,Dayong Wang,Menghua Zhen et al.
Feifan Fan et al.
Terahertz (THz) in-line digital holography is a powerful full-field phase imaging technique with a simple optical configuration and a high-space-bandwidth product. However, the phase reconstructed via conventional methods is usually wrapped...
210-W thin-rod Yb:YAG picosecond laser at 100 kHz repetition rate [0.03%]
重复频率为100kHz的210um细杆Yb:YAG皮秒激光器
Yuyuan Fan,Zhaoshi Guo,Feilong Yang et al.
Yuyuan Fan et al.
A high-average-power, mJ-class picosecond laser featuring a fiberized front-end and multi-stage thin-rod Yb:YAG amplifiers is presented. Seed pulses centered at 1030 nm from a mode-locked oscillator were temporally stretched and pulse-picke...
Integration of Gaussian-mode emission and multimode fiber reception with Doppler-shifted interval analysis for rotational velocity detection [0.03%]
基于多普勒频移区间分析的高斯模发射与多模光纤接收一体化旋转测速方法
Yanxiang Zhang,Yongkang Dong
Yanxiang Zhang
Rotational Doppler velocimetry (RDV) has emerged as a key technique for sensing and identifying spinning objects. However, existing fiber-based RDV systems generally rely on customized mode-selective couplers for orbital-angular-momentum ge...
Ultrabroad tunable (4.5-15 µm) high-energy, high-power picosecond optical parametric oscillator in BGSe crystal [0.03%]
基于BGSe晶体的超宽带可调(4.5-15 µm)高能高功率皮秒光学参量振荡器
You Fang,Yu Shen,Er-Peng Wang et al.
You Fang et al.
We demonstrate the first, to the best of our knowledge, ultrabroad tunable (4.5-15 μm) mid-infrared (MIR) synchronously pumped optical parametric oscillator (SPOPO) based on BaGa4Se7 (BGSe) crystal. Pumped by a burst-mode picosecond 1.064 ...
Physics-informed neural network for dynamic demodulation of Fabry-Perot sensors under ultra-sparse sampling [0.03%]
物理启发神经网络在法布里珀罗传感器超稀疏采样动态解调中的应用
Sufen Ren,Shengchao Chen,Hao Shi et al.
Sufen Ren et al.
We propose a physics-informed neural network (PINN) for dynamic cavity-length demodulation of fiber Fabry-Perot (F-P) sensors operating under ultra-sparse eight-channel arrayed-waveguide-grating (AWG) sampling. The F-P interference equation...
Two-line-seeded dark-soliton microcomb cloning dynamics in normal-dispersion microresonators [0.03%]
正常色散微谐振腔中两线播种的暗类孤子微频梳克隆动力学
Chenghao Wang,Hongyi Zhang,Xiaojun Xie et al.
Chenghao Wang et al.
Optical microcombs provide phase-correlated wavelength grids for parallel photonic systems. For applications requiring matched or synchronized combs, relative carrier-frequency and repetition-rate drift between independent sources can degra...
Online monitoring of laser micromachining using laser confocal scanning feedback [0.03%]
基于激光共焦扫描反馈的激光微加工在线监测方法
Yongkang Yan,Xuangyang Liang,Ti Hu et al.
Yongkang Yan et al.
As a non-contact machining technology, depth control in laser micromachining is inherently more challenging than in conventional mechanical methods. Fluctuations in processing parameters or sample surface quality can easily lead to uneven m...