High Efficiency Continuous-Wave Tm:Ho:GdVO4 Laser Pumped by a Diode

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2004,（11）
• 页码范围: 2182-2183
• 页数: 2页
• 语种: 英文

摘要

We report a high efficiency cw diode-pumped cryogenic Tm(5at.%), Ho(0. 5at.%):GdVO4 laser. The pumping source is a fibre-coupled laser diode with fibre core diameter of 0.4mm and numerical aperture of 0.3, supplying power 14.8 W at 793.6nm. For input pump power of 13.6 W at 794.2nm, the maximum output power of 4.2 W,optical-to-optical conversion efficiency of 31% and slope efficiency 38% have been attained at 2.0485 μm. To our knowledge, the operating performance is the best among the previously reported Tm:Ho:GdVO4 lasers. We also analyse the influence of pump wavelengths (from 792 nm to 794.2nm) on the output power, the optical-to-optical conversion efficiency increases with the longer pump wavelength which is closer to the absorption peak of 797nm in Tm,Ho:GdVO4.