Composite Yb:YAG/sapphire thin-disk active elements for high-energy high-average power lasers

Kuznetsov, Ivan; Pestov, A. E.; Mukhin, Ivan; Volkov, Mikhail; Zorina, M. V.; Чхало, Н. И.; Palashov, O.

doi:10.1364/ol.384898

Cited by 21 publications

(3 citation statements)

References 18 publications

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“…An option to realize a thin active layer and at the same time a thick disk to reduce ASE is using an undoped so-called 'Anti-ASE cap' bonded on top of the (thin) doped disk. The undoped cap adds a thermal lens due to the radial heat flow, which could be used to compensate the focal power of the disk, but adds also rather strong aspherical distortions [93,98,103,104]. Therefore, this does not seem to be a good choice for fundamental-mode lasers, neither for cw nor for mode-locked operation.…”

Section: Continuous-wave Disk Lasersmentioning

confidence: 99%

High-power, high-brightness solid-state laser architectures and their characteristics

et al. 2022

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The development of high-power diode lasers enabled new solid-state laser concepts such as thin-disk, fiber, and Innoslab lasers based on trivalent ytterbium as the laser-active ion, which resulted in a tremendous increase in the efficiency and beam quality of cw lasers compared to previously used lamp-pumped rod or slab lasers and the realization of ultrafast lasers with several 100 W or even kilowatts of average power. In addition to their beneficial thermo-optical properties, these architectures offer characteristic benefits making them especially suitable to obtain dedicated laser properties. This review article comprises milestone developments, characteristic challenges, and benefits, and summarizes the state of the art of high-power solid-state lasers with the focus on ultrafast lasers.

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Section: Continuous-wave Disk Lasersmentioning

confidence: 99%

High-power, high-brightness solid-state laser architectures and their characteristics

et al. 2022

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“…The purpose is to help dissipate the uneven heat gathered inside the crystal, so as to ease the temperature difference between the center and side of the crystal. Then, the thermal lens effect caused by the refractive index change induced by the deformation of the end face is reduced. − Furthermore, the crystals with different doping concentrations are multibonded according to the doping concentration from low to high, so that the laser gain medium away from the pump end can also absorb enough pump light energy. In this way, the overall temperature difference of the gain medium is reduced to improve the thermal effect in laser generation. − However, this bonding technology requires very strict flatness and cleanliness of the bonding surface, so the preparation process is more cumbersome.…”

Section: Introductionmentioning

confidence: 99%

Growth of a Gradient-Doped Single-Crystal Rod with Designable Distribution of Doped Ions by a Laser-Heated Pedestal Growth Method

Dai

Dong

Zhang

et al. 2023

Crystal Growth & Design

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The thermal effect of a diode pumped solid-state laser mainly caused by nonuniform thermal distribution is the significant bottleneck limiting the output power achievable. In this work, a novel strategy to synthesize YAG crystal thin rods with a designable axial dopant gradient based on the laser-heated pedestal growth (LHPG) method was developed. To make the pump light uniformly absorbed through the whole rod, the optimal doping concentration profile along the axis of single-crystal rods (SCRs) was theoretically deduced. Finite element simulation results demonstrated that the Nd:YAG crystal thin rods with a designed dopant gradient can significantly reduce heat loads under laser operation. Using the grown gradient doped SCRs as a gain medium, the laser diode pumped continuous-wave laser at ∼1.06 μm was achieved with the highest slope efficiency of 44% and a maximum output power of 6.46 W. Under the same conditions, the slope efficiency of the uniformly doped SCRs was 38.7% and the maximum output power was 4.95 W. The results show that the SCRs with gradient dopants possess better thermal management and superior laser performance. Significantly, this method also provides a new idea for realizing the controllable distribution of doped ions in crystal growth.

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“…д.) [2]. Они могут использоваться как в качестве активных элементов мощных лазеров, так и в магнитоактивных изоляторах Фарадея для них [3].…”

Section: Introductionunclassified

Подготовка Поверхности Материалов Для Создания Композитных Оптических Элементов

Зорина¹,

Кузнецов²,

Михайленко³

et al. 2020

Журнал Технической Физики

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The quality of surface preparation of various laser materials for the purpose of creating composite elements is studied. It is shown that the flatness of the samples should be no worse than λ/10, and the roughness - no more than 1.0 nm. Parameters of ion etching that do not lead to roughness degradation are found: Ar ions, Eion=800 eV and grazing angle θ=5º. Composite elements were created from yttrium aluminium garnet doped with ytterbium ions (Yb:YAG), as well as a magnetoactive TGG crystal with single crystals of sapphire.

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Composite Yb:YAG/sapphire thin-disk active elements for high-energy high-average power lasers

Cited by 21 publications

References 18 publications

High-power, high-brightness solid-state laser architectures and their characteristics

High-power, high-brightness solid-state laser architectures and their characteristics

Growth of a Gradient-Doped Single-Crystal Rod with Designable Distribution of Doped Ions by a Laser-Heated Pedestal Growth Method

Подготовка Поверхности Материалов Для Создания Композитных Оптических Элементов

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