Properties of long light filaments in natural environment

• 来源期刊: 中国物理B（英文版）
• 关键词: laser-plasma interactions filamentation propagation
• 年，卷（期）: 2018,（8）
• 页码范围: 374-377
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/8/085203

摘要

The multiple filamentation of terawatt femtosecond (fs) laser pulses is experimentally studied in a natural environment.A more than 30-m long plasma filament with a millimeter diameter is formed by the collimated fs laser pulse freely propagating in an open atmosphere. This study provides the first quantitative experimental data about the electron density of a long range light filament in the atmosphere. The electron density of such a filament is quantitatively detected by using an electric method, showing that it is at the 1011-cm??3 level.