New class of cw high-power diode-pumped alkali lasers (DPALs)

被引：38

作者：

Krupke, WF ^{[1
]}

Beach, RJ ^{[1
]}

Kanz, VK ^{[1
]}

Payne, SA ^{[1
]}

Early, JT ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

来源：

HIGH-POWER LASER ABLATION V, PTS 1 AND 2 | 2004年 / 5448卷

关键词：

diode; pumping; alkali; rubidium; cesium; potassium; vapor; laser;

D O I：

10.1117/12.547954

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The new class of diode-pumped alkali vapor lasers (DPALs) offers high efficiency cw laser radiation at near-infrared wavelengths: cesium 895 nm, rubidium 795 run, and potassium 770 nm. The working physical principles of DPALs will be presented. Initial 795 run Rb and 895 rim Cs laser experiments performed using a titanium sapphire laser as a surrogate pump source demonstrated DPAL slope power conversion efficiencies in the 50-70% range, in excellent agreement with device models utilizing only literature spectroscopic and kinetic data. Using these benchmarked models for Rb and Cs, optimized DPALs with optical-optical efficiencies >60%, and electrical efficiencies of 25-30% are projected. DPAL device architectures for near-diffraction-limited power scaling into the high kilowatt power regime from a single aperture will be described. DPAL wavelengths of operation offer ideal matches to silicon and gallium arsenide based photovoltaic power conversion cells for efficient power beaming.

引用

页码：7 / 17

页数：11

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