AI Article Synopsis
- Ultrashort pulse ablation is an emerging technique beneficial for applications in micromachining and medical surgery, but its use in confined spaces has been challenging.
- Utilizing wavefront shaping in a multi-core fiber (MCF) allows for effective focusing and scanning of high-power pulses without bulky optics, leading to smaller and more efficient ablation tools.
- The study evaluates the performance of different MCF devices and successfully demonstrates ablation on a thin film of gold, while also examining the limitations caused by nonlinear effects within the fiber's cores.
Article Abstract
Ultrashort pulse ablation has become a useful tool for micromachining and biomedical surgical applications. Implementation of ultrashort pulse ablation in confined spaces has been limited by endoscopic delivery and focusing of a high peak power pulse. Here we demonstrate ultrashort pulse ablation through a thin multi-core fiber (MCF) using wavefront shaping, which allows for focusing and scanning the pulse without requiring distal end optics and enables a smaller ablation tool. The intensity necessary for ablation is significantly higher than for multiphoton imaging. We show that the ultimate limitations of the MCF based ablation are the nonlinear effects induced by the pulse in the MCFs cores. We characterize and compare the performance of two devices utilizing a different number of cores and demonstrate ultrashort pulse ablation on a thin film of gold.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.25.011491 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Subcycle modulation of light's orbital angular momentum via a Fourier space-time transformation.
Sci Adv
January 2025
Center for Nano Science and Technology, Fondazione Istituto Italiano di Tecnologia, Milano, Italy.
Achieving highly tailored control over both the spatial and temporal evolution of light's orbital angular momentum (OAM) on ultrafast timescales remains a critical challenge in photonics. Here, we introduce a method to modulate the OAM of light on a femtosecond scale by engineering a space-time coupling in ultrashort pulses. By linking azimuthal position with time, we implement an azimuthally varying Fourier transformation to dynamically alter light's spatial distribution in a fixed transverse plane.
View Article and Find Full Text PDFSpacetime Imaging of Group and Phase Velocities of Terahertz Surface Plasmon Polaritons in Graphene.
Nano Lett
January 2025
Regensburg Center for Ultrafast Nanoscopy (RUN) and Department of Physics, University of Regensburg, 93040 Regensburg, Germany.
Detecting electromagnetic radiation scattered from a tip-sample junction has enabled overcoming the diffraction limit and started the flourishing field of polariton nanoimaging. However, most techniques only resolve amplitude and relative phase of the scattered radiation. Here, we utilize field-resolved detection of ultrashort scattered pulses to map the dynamics of surface polaritons in both space and time.
View Article and Find Full Text PDFNon-Resonant Magnetic X-ray Scattering as a Probe of Ultrafast Molecular Spin-State Dynamics: An Ab Initio Theory.
J Chem Theory Comput
January 2025
State Key Laboratory for Mesoscopic Physics and Collaborative Innovation Center of Quantum Matter, School of Physics, Peking University, Beijing 100871, China.
Article Synopsis
- Advanced techniques like high harmonic generation and X-ray free-electron lasers have enabled the study of ultrafast electron and spin dynamics on extremely short timescales.
- The authors propose using magnetic X-ray scattering (MXS) to measure molecular spin-state dynamics and outline a protocol for simulating MXS patterns using multiconfigurational quantum chemistry.
- The method is validated through simulations of spin-flip dynamics in the TiCl molecule, showcasing MXS's ability to detect real-time spin-state changes and infer spatial characteristics of spin density from diffraction patterns.
Tunable Multisoliton State Ultrafast Fiber Laser Based on NiSe and Generation of Vector Dual-Wavelength Solitons.
ACS Appl Mater Interfaces
January 2025
College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Lin'an 311300, China.
As a member of the chalcogenide family, NiSe exhibits a direct bandgap of 1.74 eV, making it a promising candidate for nonlinear optical devices. However, its potential in the near-infrared region of the telecommunication band has not been fully explored.
View Article and Find Full Text PDFUnderstanding low-threshold mode-locking at multi-GHz repetition rate.
Light Sci Appl
January 2025
Russell Centre for Advanced Lightwave Science, Shanghai Institute of Optics and Fine Mechanics and Hangzhou Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China.
Continuous-wave mode-locking at multi-GHz repetition rates is achieved in an ultrashort laser cavity at critical pulse energies 100 times lower than predicted by conventional theory. The authors reveal that dynamic gain depletion and recovery between consecutive round-trips is the key factor behind a low-pulse-energy transition from Q-switched mode-locking (QSML) to continuous-wave mode-locking (CWML). As well as providing new insight into gain dynamics, the results suggest a practical route to low-threshold lasing at very high-repetition rates.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!