4.3μm 室温下 Fe:ZnSe 激光器的能量缩放。

Energy scaling of 4.3 μm room temperature Fe:ZnSe laser.

机构信息

Center for Optical Sensors and Spectroscopies and Department of Physics, University of Alabama at Birmingham, CH310, 1300 University Boulevard, Birmingham, Alabama 35294, USA.

出版信息

Opt Lett. 2011 Jan 1;36(1):94-6. doi: 10.1364/OL.36.000094.

DOI:10.1364/OL.36.000094

PMID:21209698

Abstract

We demonstrate a fourfold increase of the output energy of the gain-switched mid-IR Fe:ZnSe laser. Iron doping of the ZnSe polycrystalline samples was realized using a postgrowth thermal-diffusion method from the metal film. Gain-switched Er:Cr:YSGG (2.8 μm) laser pumped Fe:ZnSe lasing was studied in a Fabry-Perot cavity over a 236-300 K temperature range. The maximum output energy reached 4.7 mJ at 4.3 μm and 3.6 mJ at 4.37 μm at 236 K and 300 K and was limited only by available pump energy. The laser threshold was about 8 mJ and was practically unchanged over the studied temperature range. The laser slope efficiencies, measured with respect to the input pump energy, decreased from 19% to 16% with an increase of temperature from 236 to 300 K. The output radiation featured a Gaussian spatial profile with M(2) = 2.6.

摘要

我们展示了增益开关中红外 Fe:ZnSe 激光器的输出能量提高了四倍。通过从金属膜进行后生长热扩散方法，实现了 ZnSe 多晶样品的铁掺杂。在法布里-珀罗腔中研究了增益开关的 Er:Cr:YSGG（2.8μm）激光泵浦 Fe:ZnSe 激光，温度范围为 236-300K。在 236K 和 300K 时，在 4.3μm 和 4.37μm 处，最大输出能量分别达到 4.7mJ 和 3.6mJ，仅受可用泵浦能量限制。激光阈值约为 8mJ，在研究的温度范围内基本不变。激光斜率效率相对于输入泵浦能量进行测量，从 236K 到 300K 温度升高时，从 19%下降到 16%。输出辐射具有高斯空间分布，M(2)=2.6。