Rapid growth and properties of large-aperture 98%-deuterated DKDP crystals

Cai, Xumin; Lin, Xiao-Lu; Li, Guohui; Lu, Ji-Qing; Hu, Ziyu; Zheng, Ganhong

doi:10.1017/hpl.2019.24

Cited by 24 publications

(20 citation statements)

References 26 publications

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“…Zhang et al successfully used point-seed rapid growth technology to grow DKDP crystals with a deuterium content of 98% 31 , 32 . In 2019, Cai et al reported that a highly deuterated DKDP crystal with sizes up to 318 mm × 312 mm × 265 mm was grown by the rapid-growth method 33 . This demonstrates that growth by the rapid growth method not only shortens the growth period but also avoids the disturbance of monoclinic crystals, especially for the growth of highly deuterated DKDP crystals.…”

Section: Crystal Growthmentioning

confidence: 99%

Progress on deuterated potassium dihydrogen phosphate (DKDP) crystals for high power laser system application

Liu

Zhang

et al. 2022

Light Sci Appl

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In this review, we introduce the progress in the growth of large-aperture DKDP crystals and some aspects of crystal quality including determination of deuterium content, homogeneity of deuterium distribution, residual strains, nonlinear absorption, and laser-induced damage resistance for its application in high power laser system. Large-aperture high-quality DKDP crystal with deuteration level of 70% has been successfully grown by the traditional method, which can fabricate the large single-crystal optics with the size exceeding 400 mm. Neutron diffraction technique is an efficient method to research the deuterium content and 3D residual strains in single crystals. More efforts have been paid in the processes of purity of raw materials, continuous filtration technology, thermal annealing and laser conditioning for increasing the laser-induced damage threshold (LIDT) and these processes enable the currently grown crystals to meet the specifications of the laser system for inertial confinement fusion (ICF), although the laser damage mechanism and laser conditioning mechanism are still not well understood. The advancements on growth of large-aperture high-quality DKDP crystal would support the development of ICF in China.

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Section: Crystal Growthmentioning

confidence: 99%

Progress on deuterated potassium dihydrogen phosphate (DKDP) crystals for high power laser system application

Liu

Zhang

et al. 2022

Light Sci Appl

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“…Near 900 nm central wavelength, many nonlinear crystals, such as lithium triborate (LBO) and deuterated potassium dihydrogen phosphate (DKDP), can realize over 200 nm bandwidth when pumped with high-energy frequency-doubled Nd:YAG or Nd:glass lasers. Especially, the existing crystal growth technologies can support large DKDP crystals over 400 mm size [10]. Therefore, the DKDP-based OPCPA scheme is considered a promising approach for developing 100 PW-class laser facilities.…”

Section: Introductionmentioning

confidence: 99%

13.4 fs, 0.1 Hz OPCPA Front End for the 100 PW-Class Laser Facility

Wang

Liu

et al. 2022

Ultrafast Sci

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Here, we report the recent progress on the front end developed for the 100 PW-class laser facility. Using 3 stages of optical parametric chirped-pulse amplification (OPCPA) based on lithium triborate (LBO) crystals, we realized a 5.26 J/0.1 Hz amplified output with a bandwidth over 200 nm near the center wavelength of 925 nm. After the compressor, we obtained a pulse duration of 13.4 fs. As the compression efficiency reached 67%, this OPCPA front end could potentially support a peak power of 263 TW at a repetition rate of 0.1 Hz. To the best of our knowledge, among all the 100 TW-level OPCPA systems, it shows the widest spectral width, the shortest pulse duration, and it is also the first OPCPA system working at a repetition-rate mode.

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“…It has been considered in many research studies that the laser damage was induced by localized absorption by either foreign nanoparticles incorporated during growth or intrinsic defect clusters formed during crystal growth [13][14][15]. Even though substantial improvements are made in DKDP growth technology to reduce defects over the past several years [16][17][18][19], the actual LIDT is still much lower than the theoretical value. Therefore, clarifying the LID mechanism is urgently needed.…”

Section: Introductionmentioning

confidence: 99%

Research on the Nonlinear Absorption Coefficient of 98% Deuterated DKDP Crystal at Fourth-Harmonic-Generation Wavelength

Zhang

et al. 2022

Front. Phys.

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A series of 98% deuterated DKDP crystals were grown in solutions with different pD values (2.9, 3.3, 3.8, and 4.3) using the rapid growth method. Samples were cut along the z-direction and fourth-harmonic-generation (FHG) direction which contained both pyramidal and prismatic regions. The nonlinear absorption (NLA) coefficient β of 98% deuterated DKDP crystals was obtained using the Z-scan method operated at the FHG wavelength (266 nm) of a picosecond Nd:YAG laser. According to the results, the nonlinear absorption at 266 nm could be identified as two-photon absorption. The β values of crystal grown in the solution with 3.3 pD value were higher than those of crystals grown in solutions with other pD values under higher laser fluence. The results also indicated that FHG device samples should be prepared from the pyramidal region due to its lower β value. This work will help optimizing the application of 98% DKDP crystals as FHG elements in high-power laser systems.

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Rapid growth and properties of large-aperture 98%-deuterated DKDP crystals

Cited by 24 publications

References 26 publications

Progress on deuterated potassium dihydrogen phosphate (DKDP) crystals for high power laser system application

Progress on deuterated potassium dihydrogen phosphate (DKDP) crystals for high power laser system application

13.4 fs, 0.1 Hz OPCPA Front End for the 100 PW-Class Laser Facility

Research on the Nonlinear Absorption Coefficient of 98% Deuterated DKDP Crystal at Fourth-Harmonic-Generation Wavelength

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