A doughnut-shaped Nd:YAG solar laser beam with 4.5 W/m 2 collection efficiency

Research output: Contribution to journalArticle

Abstract

In this paper, a doughnut-shaped solar laser beam from a Nd:YAG rod pumped through a heliostat-parabolic mirror system is reported. A solar laser head was composed of a fused silica liquid light guide lens and a conical pump cavity, within which a 4 mm diameter, 35 mm length Nd:YAG single-crystal rod was efficiently end-side-pumped. Multimode solar laser power of 24 W was measured by adopting a short laser resonant cavity, attaining 6.4% slope efficiency. The influence of the radius of curvature of the output mirror and laser resonant cavity length on the laser output performance were studied. By operating the laser resonator close to the edge of the optically stable region, record 4.5 W doughnut-shaped solar laser power was achieved, corresponding to 4.5 W/m 2 collection efficiency, which is 1.67 times higher than previous record from a side-pumped grooved Nd:YAG laser rod. A four-petal like Gaussian solar laser beam was also produced for the first time. This technique required no additional optical element in the resonator, reducing thus laser power losses and system complexity.

Original languageEnglish
Pages (from-to)42-47
Number of pages6
JournalSolar Energy
Volume182
DOIs
Publication statusPublished - 1 Apr 2019

Fingerprint

Laser beams
Lasers
Cavity resonators
Mirrors
Laser resonators
Fused silica
Optical devices
Resonators
Lenses
Single crystals
Pumps
Liquids

Keywords

  • Doughnut-shaped
  • Four-petal
  • Laser beam
  • Nd:YAG
  • Parabolic mirror
  • Solar laser

Cite this

@article{bb06e7a2a6e34dd891dd2352e4859f16,
title = "A doughnut-shaped Nd:YAG solar laser beam with 4.5 W/m 2 collection efficiency",
abstract = "In this paper, a doughnut-shaped solar laser beam from a Nd:YAG rod pumped through a heliostat-parabolic mirror system is reported. A solar laser head was composed of a fused silica liquid light guide lens and a conical pump cavity, within which a 4 mm diameter, 35 mm length Nd:YAG single-crystal rod was efficiently end-side-pumped. Multimode solar laser power of 24 W was measured by adopting a short laser resonant cavity, attaining 6.4{\%} slope efficiency. The influence of the radius of curvature of the output mirror and laser resonant cavity length on the laser output performance were studied. By operating the laser resonator close to the edge of the optically stable region, record 4.5 W doughnut-shaped solar laser power was achieved, corresponding to 4.5 W/m 2 collection efficiency, which is 1.67 times higher than previous record from a side-pumped grooved Nd:YAG laser rod. A four-petal like Gaussian solar laser beam was also produced for the first time. This technique required no additional optical element in the resonator, reducing thus laser power losses and system complexity.",
keywords = "Doughnut-shaped, Four-petal, Laser beam, Nd:YAG, Parabolic mirror, Solar laser",
author = "Vistas, {Cl{\'a}udia R.} and Dawei Liang and Joana Almeida and Tib{\'u}rcio, {Bruno D.} and D{\'a}rio Garcia",
note = "Financial support of the strategic project (UID/FIS/00068/2019) of the Science and Technology Foundation of Portuguese Ministry of Science, Technology and Higher Education (FCT-MCTES) is acknowledged. The fellowship grants SFRH/BPD/125116/2016, PD/BD/128267/2016 and PD/BD/142827/2018 of Claudia R. Vistas, Bruno D. Tiburcio and Dario Garcia, respectively, are also acknowledged.",
year = "2019",
month = "4",
day = "1",
doi = "10.1016/j.solener.2019.02.030",
language = "English",
volume = "182",
pages = "42--47",
journal = "Solar Energy",
issn = "0038-092X",
publisher = "Elsevier Science B.V., Amsterdam.",

}

TY - JOUR

T1 - A doughnut-shaped Nd:YAG solar laser beam with 4.5 W/m 2 collection efficiency

AU - Vistas, Cláudia R.

AU - Liang, Dawei

AU - Almeida, Joana

AU - Tibúrcio, Bruno D.

AU - Garcia, Dário

N1 - Financial support of the strategic project (UID/FIS/00068/2019) of the Science and Technology Foundation of Portuguese Ministry of Science, Technology and Higher Education (FCT-MCTES) is acknowledged. The fellowship grants SFRH/BPD/125116/2016, PD/BD/128267/2016 and PD/BD/142827/2018 of Claudia R. Vistas, Bruno D. Tiburcio and Dario Garcia, respectively, are also acknowledged.

PY - 2019/4/1

Y1 - 2019/4/1

N2 - In this paper, a doughnut-shaped solar laser beam from a Nd:YAG rod pumped through a heliostat-parabolic mirror system is reported. A solar laser head was composed of a fused silica liquid light guide lens and a conical pump cavity, within which a 4 mm diameter, 35 mm length Nd:YAG single-crystal rod was efficiently end-side-pumped. Multimode solar laser power of 24 W was measured by adopting a short laser resonant cavity, attaining 6.4% slope efficiency. The influence of the radius of curvature of the output mirror and laser resonant cavity length on the laser output performance were studied. By operating the laser resonator close to the edge of the optically stable region, record 4.5 W doughnut-shaped solar laser power was achieved, corresponding to 4.5 W/m 2 collection efficiency, which is 1.67 times higher than previous record from a side-pumped grooved Nd:YAG laser rod. A four-petal like Gaussian solar laser beam was also produced for the first time. This technique required no additional optical element in the resonator, reducing thus laser power losses and system complexity.

AB - In this paper, a doughnut-shaped solar laser beam from a Nd:YAG rod pumped through a heliostat-parabolic mirror system is reported. A solar laser head was composed of a fused silica liquid light guide lens and a conical pump cavity, within which a 4 mm diameter, 35 mm length Nd:YAG single-crystal rod was efficiently end-side-pumped. Multimode solar laser power of 24 W was measured by adopting a short laser resonant cavity, attaining 6.4% slope efficiency. The influence of the radius of curvature of the output mirror and laser resonant cavity length on the laser output performance were studied. By operating the laser resonator close to the edge of the optically stable region, record 4.5 W doughnut-shaped solar laser power was achieved, corresponding to 4.5 W/m 2 collection efficiency, which is 1.67 times higher than previous record from a side-pumped grooved Nd:YAG laser rod. A four-petal like Gaussian solar laser beam was also produced for the first time. This technique required no additional optical element in the resonator, reducing thus laser power losses and system complexity.

KW - Doughnut-shaped

KW - Four-petal

KW - Laser beam

KW - Nd:YAG

KW - Parabolic mirror

KW - Solar laser

UR - http://www.scopus.com/inward/record.url?scp=85061769464&partnerID=8YFLogxK

U2 - 10.1016/j.solener.2019.02.030

DO - 10.1016/j.solener.2019.02.030

M3 - Article

VL - 182

SP - 42

EP - 47

JO - Solar Energy

JF - Solar Energy

SN - 0038-092X

ER -