观察超短高强度激光脉冲在空心光纤中传播时产生的126纳米真空紫外Ar2*辐射增益。

Observation of vacuum-ultraviolet Ar2* radiation gain at 126 nm produced by an ultrashort high-intensity laser pulse propagating in a hollow fiber.

作者信息

Kaku Masanori, Higashiguchi Takeshi, Kubodera Shoichi, Sasaki Wataru

机构信息

Department of Electrical and Electronic Engineering, Photon Science Center, Miyazaki University, Gakuen Kibanadai Nishi 1-1, Miyazaki 889-2192, Japan.

出版信息

Opt Lett. 2003 May 15;28(10):804-6. doi: 10.1364/ol.28.000804.

DOI:10.1364/ol.28.000804

PMID:12779152

Abstract

We observed a small-signal gain of Ar2* emission at 126 nm by use of a hollow fiber to guide the high-intensity laser propagation in high-pressure Ar. The small-signal gain coefficient was measured to be 0.05 cm(-1) at 126 nm. Kinetic analysis revealed that the electrons produced by the high-intensity laser through an optical-field-induced ionization process initiated the Ar2* production processes. The increase in the emission intensity was measured to be exp(2.5), with an increase in the fiber length.

摘要

我们通过使用空心光纤来引导高强度激光在高压氩气中传播，观测到了126纳米处Ar2发射的小信号增益。在126纳米处测得小信号增益系数为0.05厘米⁻¹。动力学分析表明，高强度激光通过光场诱导电离过程产生的电子引发了Ar2的产生过程。随着光纤长度的增加，发射强度的增加量经测量为exp(2.5)。