Passively Mode-locked Nd:Cr:YAG Laser pumped by a Modular Scalable Solar Light Concentrator

Seifert, Birger; Wheatley, Robert; Rojas‐Aedo, Ricardo; González, Sebastián; Wallentowitz, S.; Volkmann, U.G.

doi:10.1364/ose.2017.rw4a.2

Cited by 1 publication

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“…Optical coatings are usually very sensitive to optical damage. Seifert et al and Xu et al [12,13] reported UV laserswith inserting a coated lens into the cavity. Yu et al [14] demonstrated an UV laser that employs prisms to separate fundamental and harmonic light.…”

Section: Introductionmentioning

confidence: 99%

End-pump high efficiency 355 nm laser with a convex–concave cavity and optically-uncoated Brewster angle-cut LiB₃O₅ crystal

Yang¹,

Li²,

Wang³

et al. 2019

J. Opt.

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We demonstrate a 3.65 W, 40 kHz, 17.5 ns end-pumped YVO4/Nd:YVO4 ultraviolet (UV) laser at 355 nm with a beam propagation factor of 1.32 and 1.14. The frequency doubling and tripling are obtained by employing a parallel surfaces LBO crystal and a Brewster angle-cut uncoated LBO crystal in a convex–concave cavity. The arrangement allows the use of optically-uncoated third harmonic generation LBO crystal surfaces while providing wavelength separation. It is proved that the optically-uncoated THG-LBO crystal has a higher damage threshold. Pump-UV conversion efficiency of 15.5% is obtained and it is higher compared with other intra-cavity-wavelength-separation UV nanosecond lasers. By designing a convex–concave cavity structure, four advantages are showed, (1) to compensate for astigmatism caused by the Brewster angle-cut uncoated LBO crystal; (2) to offset the thermal lens effect of the gain medium; (3) to obtain a fundamental light spot size which matches with pump light spot size in the center of gain medium; (4) to obtain a small spot size in the center of the frequency conversion crystals. By employing these designs, UV beam quality Mx2 = 1.32 and My2 = 1.14 at 3.65 W are obtained.

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Section: Introductionmentioning

confidence: 99%

End-pump high efficiency 355 nm laser with a convex–concave cavity and optically-uncoated Brewster angle-cut LiB₃O₅ crystal

Yang¹,

Li²,

Wang³

et al. 2019

J. Opt.

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Passively Mode-locked Nd:Cr:YAG Laser pumped by a Modular Scalable Solar Light Concentrator

Cited by 1 publication

References 6 publications

End-pump high efficiency 355 nm laser with a convex–concave cavity and optically-uncoated Brewster angle-cut LiB₃O₅ crystal

End-pump high efficiency 355 nm laser with a convex–concave cavity and optically-uncoated Brewster angle-cut LiB₃O₅ crystal

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Passively Mode-locked Nd:Cr:YAG Laser pumped by a Modular Scalable Solar Light Concentrator

Cited by 1 publication

References 6 publications

End-pump high efficiency 355 nm laser with a convex–concave cavity and optically-uncoated Brewster angle-cut LiB3O5 crystal

End-pump high efficiency 355 nm laser with a convex–concave cavity and optically-uncoated Brewster angle-cut LiB3O5 crystal

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End-pump high efficiency 355 nm laser with a convex–concave cavity and optically-uncoated Brewster angle-cut LiB₃O₅ crystal

End-pump high efficiency 355 nm laser with a convex–concave cavity and optically-uncoated Brewster angle-cut LiB₃O₅ crystal