Solar-pumped solid state laser program

Lando, Mordechai; Kagan, Jacob; Shimony, Y.; Kalisky, Y.; Noter, Y.; Yogev, Amnon; Rotman, Stanley R.; Rosenwaks, Salman

doi:10.1117/12.281351

Cited by 35 publications

(28 citation statements)

References 10 publications

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“…Direct solar pumping of lasers exhibits promising potential to surmount the current limitations of nonrenewable laser sources, which may lead to a significant decrease in the cost of lasers. This type of renewable energy is especially suited to space-based applications: space-to-space and space-to-earth wireless power transmission, 1 free-space optical communication, 2 laser propulsion, 3 asteroid deflection, 4 and removal of orbital debris. 5 It has also large potential on terrestrial applications, such as laser material processing and renewable energy cycles.…”

Section: Introductionmentioning

confidence: 99%

Seven-rod pumping concept for simultaneous emission of seven TEM00-mode solar laser beams

et al. 2020

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In present-day single-rod/single-beam solar laser systems, the thermal lens effect is a serious issue that limits its ability for a scale-up to higher powers and improved beam quality. Aiming at resolving this shortcoming, the concept of a seven-rod/seven-beam solar pumping scheme is proposed. This scheme was composed of a first-stage heliostat-parabolic mirror system and a single large laser head. The large laser head consisted of seven fused silica compound parabolic concentrators, which transmitted and focused the concentrated solar radiation to each single-laser rod of small diameter, within a conical cavity, which enabled multiple passages of the pump rays. Consequently, each laser rod was pumped by only one-seventh of the total concentrated solar power, ensuring a significant reduction of the thermal induced effects in the laser rods. 13.3 W∕m 2 TEM 00 -mode solar laser collection efficiency was numerically achieved, representing an enhancement of 1.68 times over the experimental record from a single-rod prototype. 1.80 times improvement in solar-to-TEM 00 -mode laser power conversion efficiency was also registered in relation to the previous experimental record.

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Section: Introductionmentioning

confidence: 99%

Seven-rod pumping concept for simultaneous emission of seven TEM00-mode solar laser beams

et al. 2020

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“…As solar energy is highly abundant and most importantly, free, the direct production of solar laser power by natural sunlight may provide cost-effective solutions to many demanding applications of laser technologies. Since no artificial pumping sources like expensive laser diode stacks or arc lamps along with their associated electrical power generation and conditioning equipment are involved, solar laser are more adequate for space applications, such as atmospheric and ocean sensing, laser power beaming, deep space communications [1], etc. Solar laser has also large potentials for terrestrial applications like high-temperature material processing and magnesium-hydrogen energy cycle [2,3].…”

Section: Introductionmentioning

confidence: 99%

Side-pumped continuous-wave Nd:YAG solar laser with 5.4% slope efficiency

Liang

Vistas

Almeida

et al. 2019

Solar Energy Materials and Solar Cells

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We report here a significant progress in side-pumped solar laser slope efficiency by pumping a 3.0 mm diameter, 30 mm length Nd:YAG single-crystal laser rod through a heliostat-parabolic mirror solar energy collection and concentration system with 0.9 m2 effective collection area. A large fused silica aspheric lens allowed an efficient focusing of the concentrated solar power from the focal zone of the parabolic mirror into the laser rod mounted within a novel twodimensional semi-cylindrical pump cavity. 15.3 W continuous-wave 1064 nm solar laser power was measured, resulting in 5.40% slope efficiency and 2.43% solar-to-laser conversion efficency, being 2.08 and 2.30 times, respectively, more than the previous records by side-pumping configuration. The 5.40% slope efficiency is also 1.08 times more than the previous record with Nd:YAG single-crystal rod by end-side-pumping approach. By adopting an asymmetric laser resonator, this novel sidepumping scheme also enabled an efficient production of high-quality solar laser beams in either TEM11 (4.0 W), TEM01* (doughnut-shaped, 2.9 W), TEM10 (3.2 W) or TEM00 (2.8 W) mode profiles.

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“…The concentrator system was composed of a heliostat in 100 m 2 area and a parabolic mirror in 14 m diameter, getting 60 W laser output, however, the structure was very bulky [2]. M.Lando reported that a 5.75 m 2 segmented primary mirror was mounted on a two-axis positioner, which focused the solar radiation towards a stationary non-imaging optics secondary concentrator-three dimensional compound parabolic concentrator (3-DCPC).The focused solar illuminated a Nd:YAG laser rod placed in two dimensional compound parabolic concentrator(2-DCPC).The laser power of 37 W was obtained [3,4].…”

Section: Introductionmentioning

confidence: 99%

Highly efficient side-pumped solar laser

Fang

Wang

et al. 2012

2012 International Conference on Optoelectronics and Microelectronics

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The power density of solar on the earth is so low that it can't achieve to pump laser. To surpass the lasing threshold, the solar has to be highly concentrated. We propose the highly efficient concentration system, which is composed by a Fresnel lens and a three-dimensional compound parabolic concentrator (3-DCPC).With the help of 3-DCPC, we increase the concentrateion ratio which is applied to the laser crystal. The exit of the 3-DCPC is placed in one focus of an elliptical chamber, so the solar is coupled into the elliptical chamber, pumping Nd:YAG laser media. Laser output of 6.2 W has been achieved, and the collect efficiency is 6.2W/m 2 in the experiment.

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Solar-pumped solid state laser program

Cited by 35 publications

References 10 publications

Seven-rod pumping concept for simultaneous emission of seven TEM00-mode solar laser beams

Seven-rod pumping concept for simultaneous emission of seven TEM00-mode solar laser beams

Side-pumped continuous-wave Nd:YAG solar laser with 5.4% slope efficiency

Highly efficient side-pumped solar laser

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