• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Optical and quantum electronics >Competing effects of Kerr nonlinearity and K-photon absorptions on continuous-wave laser inscriptions
【24h】

Competing effects of Kerr nonlinearity and K-photon absorptions on continuous-wave laser inscriptions

机译：Kerr非线性和K光子吸收对连续波激光题字的竞争影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Material processing with laser offers a reliable tool in a large variety of micromachining technology, ranging from on-disc inscriptions to cell ablations through DNA combing and imprinting for fabrications of micro and nanofluidic devices. In these applications lasers are designed to operate in specific regimes characterized by their powers and wavelengths, so understanding characteristic properties of the distinct possible laser operation regimes turns out to be a relevant step toward optimization of their uses as well as improvement of the technology. In this work we examine the stability of a model of femtosecond laser intended for laser inscriptions in nonlinear transparent media, taking into consideration the laser-induced material damage and multiphoton ionization. The model approximates the laser dynamics by a complex Ginzburg-Landau equation with a Kerr plus a high-order nonlinear term accounting for K-photon ionization, coupled to a Drude equation for time evolution of the electron plasma density. Following the Benjamin-Feir instability theory it is shown that depending on characteristic parameters of the model, multiphoton ionization processes can stabilize continuous-wave or pulse regimes. These parameters include the group-delay dispersion, the linear and nonlinear gains, the phase shift per roundtrip and the plasma ionization rate.
机译：激光材料处理为多种微加工技术提供了可靠的工具，从光盘上的铭文到细胞消融，再到DNA梳理和压印，可用于制造微流体和纳米流体设备。在这些应用中，激光器被设计为在以其功率和波长为特征的特定状态下工作，因此了解不同的可能的激光工作状态的特征特性是朝着优化其用途以及改进技术迈出的重要一步。在这项工作中，我们考虑了激光引起的材料损伤和多光子电离，研究了飞秒激光模型在非线性透明介质中用于激光刻印的稳定性。该模型通过一个带有Kerr的复杂Ginzburg-Landau方程和一个解释K-光子电离的高阶非线性项来近似激光动力学，再加上一个电子等离子体密度随时间变化的Drude方程。根据本杰明·费尔（Benjamin-Feir）不稳定性理论，表明根据模型的特征参数，多光子电离过程可以稳定连续波或脉冲状态。这些参数包括群延迟色散，线性和非线性增益，每次往返的相移和等离子体电离速率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号