Lowest threshold solar-pumped Ce:Nd:YAG laser with 2.06% solar-to-TEM00 mode laser conversion efficiency

Liang, Dawei; Almeida, Joana; Catela, Miguel; Costa, Hugo; Garcia, Dário; Tibúrcio, Bruno D.; Guillot, Emmanuel; Vistas, Cláudia R.

doi:10.1016/j.solmat.2024.112817

Cited by 2 publications

(3 citation statements)

References 30 publications

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“…This CE result represents also 1.21 times higher than the experimental record for all solar lasers in TEM 00 -mode operation. 14 It is also 1.28 times more than our pervious value of 15.5 W∕m 2 for the Nd:YAG solar-pumped laser with off-axis parabolic concentrators. 19 The solar-to-TEM 00 -mode laser CVE of 1.66% was also calculated, which is only 19.4% less than the experimental record achieved by pumping a thin Ce:Nd:YAG medium through a 0.085 m 2 area Fresnel lens.…”

Section: Zemax © Optimization Of the Absorbed Pump Powermentioning

confidence: 71%

“…19 The solar-to-TEM 00 -mode laser CVE of 1.66% was also calculated, which is only 19.4% less than the experimental record achieved by pumping a thin Ce:Nd:YAG medium through a 0.085 m 2 area Fresnel lens. 14 For a solar irradiance of 980 W∕m 2 , the corresponding CE was 13.55 W∕m 2 . This indicates also an improvement of 1.71 and 1.26 times higher than the previous experimental 9 and numerical 15 records, respectively, of TEM 00 -mode single-rod/single-beam Nd:YAG solar laser.…”

Section: Zemax © Optimization Of the Absorbed Pump Powermentioning

confidence: 99%

“…13 In 2024, using a 0.085 m 2 area Fresnel lens as a primary concentrator and a 2 mm diameter Ce:Nd:YAG as the laser medium, CE and CVE experimental records of 16.5 W∕m 2 and 2.06%, respectively, were achieved in TEM 00 -mode operation for all solar lasers. 14 Alongside experimental efforts, several numerical studies have been undertaken to explore single-beam and multibeam solar laser concepts. [15][16][17][18][19][20][21][22] In these studies, various optical components and laser active mediums were employed to enhance laser output efficiency in both TEM 00 -mode and multimode operations.…”

Section: Introductionmentioning

confidence: 99%

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Highly efficient end-side-pumping approach of Nd:YAG solar laser with off-axis mirror concentrator

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Section: Zemax © Optimization Of the Absorbed Pump Powermentioning

confidence: 71%

Section: Zemax © Optimization Of the Absorbed Pump Powermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Highly efficient end-side-pumping approach of Nd:YAG solar laser with off-axis mirror concentrator

Boutaka,

Liang,

Bouadjemine

et al. 2024

Opt. Eng.

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Multirod Pumping Approach with Fresnel Lens and Ce:Nd:YAG Media for Enhancing the Solar Laser Efficiency

Almeida,

Costa,

Vistas

et al. 2024

Energies

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A multirod Ce:Nd:YAG solar laser approach, using a Fresnel lens as a primary concentrator, is here proposed with the aim of considerably increasing the efficiency of solar-pumped lasers. Fresnel lenses are cost-effective, rendering solar lasers more economically competitive. In this work, solar-pumped radiation collected and concentrated using the Fresnel lens is received by a secondary three-dimensional compound parabolic concentrator which transmits and funnels the light toward the Ce:Nd:YAG laser rods within a water-cooled tertiary conical concentrator that enables efficient multipass pumping of the rods. To explore the full potential of the proposed approach, the performance of various multirod configurations is numerically evaluated. Through this study, configurations with three and seven Ce:Nd:YAG rods are identified as being the most efficient. A maximum continuous wave total laser power of 122.8 W is reached with the three-rod configuration, marking the highest value from a Ce:Nd:YAG solar laser, leading to solar-to-laser conversion and collection efficiencies of 7.31% and 69.50 W/m2, respectively. These results represent enhancements of 1.88 times and 1.79 times, respectively, over the previous experimental records from a Ce:Nd:YAG/YAG single-rod solar laser with a Fresnel lens. Furthermore, the above results are also 1.58 times and 1.68 times, respectively, greater than those associated with the most effective three-rod Ce:Nd:YAG solar laser utilizing a parabolic mirror as the main concentrator. The present study also shows the great usefulness of the simultaneous pumping of multiple laser rods in terms of reducing the thermal stress effects in active media, being the seven-rod configuration the one that offered the best compromise between maximum efficiency and thermal performance. This is crucial for the applicability of this sustainable technology, especially if we wish to scale our system to higher power laser levels.

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Lowest threshold solar-pumped Ce:Nd:YAG laser with 2.06% solar-to-TEM00 mode laser conversion efficiency

Cited by 2 publications

References 30 publications

Highly efficient end-side-pumping approach of Nd:YAG solar laser with off-axis mirror concentrator

Highly efficient end-side-pumping approach of Nd:YAG solar laser with off-axis mirror concentrator

Multirod Pumping Approach with Fresnel Lens and Ce:Nd:YAG Media for Enhancing the Solar Laser Efficiency

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