Nd:Phosphate Split-Slab Liquid Cooled kJ Amplifier for High Power Laser at High Repetition Rate

Dalbies, Pierre-Marie; Blanchot, N.; Bordenave, E.; Cadilhon, Baptiste; Cavaro, Sandy; Chonion, R.; Lavastre, Éric; Palud, F. Le; Lupi, Jean-François; Manac'h, P.; Modin, Y.; Paquignon, G.; Sajer, J.M.; Néauport, Jérôme

doi:10.1364/assl.2020.aw1a.5

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“…In particular, such a process cannot be applied at the present time when the amplifier glass slabs need to be immersed in organic and/or inorganic coolants for a high repetition rate [22][23][24][25] . The coolants would easily dissolve the bonding agent, such as the used epoxy structural adhesive, that combines the edge-cladding glass strip with the laser glass slab.…”

Section: Introductionmentioning

confidence: 99%

Monolithic edge-cladding process for the elliptical disk of N31-type Nd-doped high-power laser glass

Chen

Qian

Chen

et al. 2022

High Pow Laser Sci Eng

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This paper investigates the monolithic edge-cladding process for the elliptical disk of N31-type Nd-doped phosphate laser glass, which will be utilized under liquid cooling conditions for high-power laser systems. The thermal stress, interface bubbles and residual reflectivity, which are due to high-temperature casting and bonding during the monolithic edge-cladding process, are simulated and determined. The applied mould is optimized to a rectangular cavity mould, and the casting temperature is optimized to 1000 • C. The resulting lower bubble density makes the mean residual reflectivity as low as 6.75 × 10 −5 , which is enough to suppress the amplified spontaneous emission generated in the Nd-glass disk, and the resulting maximum optical retardation is converged to 10.2-13.3 nm/cm, which is a favourable base for fine annealing to achieve the stress specification of less than or equal to 5 nm/cm. After fine annealing at the optimized 520 • C, the maximum optical retardation is as low as 4.8 nm/cm, and the minimum transmitted wavefront peak-to-valley value is 0.222 wavelength (632.8 nm). An N31 elliptical disk with the size of 194 mm × 102 mm × 40 mm can be successfully cladded by the optimized monolithic edge-cladding process, whose edge-cladded disk with the size of 200 mm × 108 mm × 40 mm can achieve laser gain one-third higher than that of an N21-type disk of the same size.

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Section: Introductionmentioning

confidence: 99%

Monolithic edge-cladding process for the elliptical disk of N31-type Nd-doped high-power laser glass

Chen

Qian

Chen

et al. 2022

High Pow Laser Sci Eng

View full text Add to dashboard Cite

show abstract

Nd:Phosphate Split-Slab Liquid Cooled kJ Amplifier for High Power Laser at High Repetition Rate

Abstract: We present the design, experimental results and complete numerical simulation models of a liquid cooled Nd:Phosphate glass split-disk energetic amplifier, operating at 1053nm with a high repetition rate of 1 shot/minute.

Cited by 1 publication

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Monolithic edge-cladding process for the elliptical disk of N31-type Nd-doped high-power laser glass

Monolithic edge-cladding process for the elliptical disk of N31-type Nd-doped high-power laser glass

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