Effect of heat spreader thickness and material on temperature distribution and stresses in thin disk laser crystals

Saravani, M.; Jafarnia, A.F.M.; Azizi, Maryam

doi:10.1016/j.optlastec.2011.11.034

Cited by 15 publications

(3 citation statements)

References 7 publications

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“…The geometric and thermo-mechanical properties of the Yb:YAG and diamond heat sink at 300 K are detailed in Table 2. As the Yb:YAG directly interacts with the laser, its thermal conductivity should be treated as a temperature-dependent value [ 31 ] . We assumed that the size and structure of both the thin disk and diamond matched with the experiment, and copper was used for the cooling components.…”

Section: Resultsmentioning

confidence: 99%

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High-repetition-rate and High-power Efficient Picosecond Thin-disk Regenerative Amplifier

Xu,

Gao,

Liu

et al. 2023

High Pow Laser Sci Eng

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We present an effective approach to realize a highly efficient, high-power and chirped pulse amplification-free ultrafast ytterbium-doped yttrium aluminum garnet thin-disk regenerative amplifier pumped by a zero-phonon line 969 nm laser diode. The amplifier delivers an output power exceeding 154 W at a pulse repetition rate of 1 MHz with custom-designed 48 pump passes. The exceptional thermal management on the thin disk through high-quality bonding, efficient heat dissipation and a fully locked spectrum collectively contributes to achieving a remarkable optical-to-optical efficiency of 61% and a near-diffraction-limit beam quality with an M 2 factor of 1.06. To the best of our knowledge, this represents the highest conversion efficiency reported in ultrafast thin-disk regenerative amplifiers. Furthermore, the amplifier operates at room temperature and exhibits exceptional stability, with root mean square stability of less than 0.33%. This study significantly represents advances in the field of laser amplification systems, particularly in terms of efficiency and average power. This advantageous combination of high efficiency and diffraction limitation positions the thin-disk regenerative amplifier as a promising solution for a wide range of scientific and industrial applications.

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Section: Resultsmentioning

confidence: 99%

“…The sufficiently large fundamental mode on the disk and PC corresponded to the maximum peak power densities of Table 2. Thermo-mechanical properties of materials for the FEM [31] .…”

Section: Experiments Setupmentioning

confidence: 99%

High-repetition-rate and High-power Efficient Picosecond Thin-disk Regenerative Amplifier

Xu,

Gao,

Liu

et al. 2023

High Pow Laser Sci Eng

View full text Add to dashboard Cite

show abstract

“…Figure 12. Schematic diagram of jet impingement cooling system for thin disk laser [54] Laser cooling has been an important problem from the invention of the first practical laser in 1960. After invention of laser, cryogenic cooling of solid state lasers has been interested and first time proposed by Bowness [55] in 1963 and then by McMahon [56] in 1969.…”

Section: Pump and Cooling Configurationsmentioning

confidence: 99%