Study of Solar Pumped Laser for Fossil-fuel-free Energy Cycle Using Magnesium

Abstract

A new type of solar pumped laser system that has features of high-efficiency and low cost due to the use of a Fresnel lens and a Cr codoped Nd:YAG ceramic laser medium is reported in this paper. Slope efficiencies of 7 to 9% have been achieved. The laser output of about 80 W was achieved with the combination of a 4-m 2 Fresnel lens and solar light chamber as a secondary power concentrator. The maximum output from a unit area of the Fresnel lens was 20 W/m 2 , which is 2.8 times larger than the previous results with a mirror type concentrator.

Feasibility of creation of ceramic disk laser pumped by concentrated solar flux of big solar furnace

“…4 has been proposed to be used for magnesium production. Such a type of solar lasers with similar power in Ref.…”

A new approach in solar-to-laser power conversion based on the use of external solar spectrum frequency converters

“…Moreover, as it became clear later, the 80 W solar laser power reported in Ref. 4 lasted only several seconds, and quickly reduced to less than 30 W. 5 The authors were only successful in producing about 56 W stable solar laser power without breaking the ceramic laser a) E-mail: payziyev_sh@mail.ru 1941-7012/2016/8(1)/015902/10/$30.00 V C 2016 AIP Publishing LLC 8, 015902-1 medium when they used another improved version with slab configuration (the laser rod of 9 mm in diameter and 100 mm in length replaced by the 3 Â 9 Â 100 mm slab). This means that the cooling system used could not provide effective cooling for 9 mm diameter laser rod.…”

“…At real conditions a solar pumped laser system with the use of a Fresnel lens and a Cr:Nd:YAG ceramic laser medium has been demonstrated. 4 The experiments were conducted with the combination of a 4 m 2 Fresnel lens and the solar cavity as a secondary power concentrator. The maximum output laser power obtained was 80 W when the incident solar power to pumping chamber was 1860 W. But the conversion efficiency from sunlight to laser was still only 4.3% which is approximately one order of magnitude less than that reported in Refs.…”

Solar pumped Nd:YAG laser efficiency enhancement using Cr:LiCAF frequency down-shifter

“…Nanotechnology has made it possible to achieve high transparency, large-size, homogeneous solid state laser materials. A solar pumped laser system with the use of a Fresnel lens and a Cr:Nd: YAG ceramic laser medium has been demonstrated [12]. The experiments were conducted with the combination of a 4 m 2 Fresnel lens and the solar cavity as a secondary power concentrator.…”