Characterization of Proton Exchange Layer Profiles in KD<sub>2</sub>PO<sub>4</sub> Crystals by Micro-Raman Spectroscopy

Huser, Thomas; Hollars, Christopher W.; Siekhaus, Wigbert J.; Yoreo, James J. De; Suratwala, Tayyab; Land, T. A.

doi:10.1366/000370204322886726

Cited by 33 publications

(27 citation statements)

References 7 publications

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“…(4a), is typical of DKDP 4 . Indeed, the degree of deuteration can be determined by examining the spectrum 5 . Note particularly the strong line near 900 cm -1 , which is well known to be due to vibrations of the phosphate anion H 2 PO 4 in DKDP.…”

Section: Modified Materials Surrounds Bulk Damage Sitementioning

confidence: 99%

Effect on scattering of complex morphology of DKDP bulk damage sites

et al. 2005

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Bulk damage sites in frequency conversion crystals scatter and/or absorb laser light leading to interference and downstream intensification .We find that laser induced bulk damage sites in DKDP exhibit a "shell" of structurally and/or chemically modified material surrounding a central core as indicated by SEM and optical micrographs and micro Raman spectral maps. We hypothesize that the modified material has been shock wave densified and estimate the amount of densification and its effect on scattering. A simple model indicates that densification of several percent is likely and that the scattering cross section may be larger than the geometric area of the inner core by an order of magnitude.

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Section: Modified Materials Surrounds Bulk Damage Sitementioning

confidence: 99%

Effect on scattering of complex morphology of DKDP bulk damage sites

et al. 2005

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“…Thomas Hurser believed that the dependence of the Raman shift on the degree of deuteration is almost linear, while Anachkova agreed that the Δυ 1 is increasing more rapidly at higher degrees of deuteration and the change is about 1.05 cm −1 /% in the region D = 90–98%. In this work, we assumed that there is linear dependence of this shift on the degree of deuteration in the region D <9 0%.…”

Section: Resultsmentioning

confidence: 99%

Growth, structural and optical properties of 12%‐deuterated KDP crystals

Liu

Wang

et al. 2013

Crystal Research and Technology

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Key words 12%-DKDP, wideband second-harmonic generation, Raman shift, damage threshold, deuterium content.K(D 0.12 H 0.88 ) 2 PO 4 crystals were chosen to be used for quadratic nonlinear medium of wideband frequency doubling at 1 μm. A key limitation on this application is that little information can be found in the previous reports. In this work, growth as well as structural and optical properties of this crystal were investigated in detail. Experimental results in comparison with KDP indicate that lattice parameter along a-axis changes much more than lattice parameter c and infra-red absorption edge shift by 0.08 μm accompanied with increasing of transmittance in the whole region. With the introduction of deuterium atom, peak of ν 1 (PO4) shifts to lower wave number and transverse stimulated Raman scattering was effectively suppressed. Extra-ordinary and ordinary indices were also measured as function of wavelength. Good crystalline perfection and great performance of damage threshold also indicate that 12%-DKDP is an appropriate choice in the application of wideband frequency doubling at 1 μm.

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“…There are multiple methods available to determine the deuterium level. These methods depend on different principles to measure the deuterium concentration [16][17][18][19][20] , such as the variation in the ferroelectric transition temperature of DKDP, the relationship between the deuterium concentration and the Raman shift of the PO 4 vibration peak, the sensitivity of neutrons to hydrogen and deuterium elements, differences in the infrared spectra of hydrogen and deuterium atoms, and the thermo-decomposition of DKDP and KDP crystals, as described in the present literature concerned. These methods have both advantages and drawbacks.…”

Section: Deuterium Content Of the Grown Crystalmentioning

confidence: 99%

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

Cai

Lin

et al. 2019

High Pow Laser Sci Eng

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In this paper, a highly deuterated potassium dihydrogen phosphate (DKDP) crystal with sizes up to 318 mm × 312 mm × 265 mm was grown by the rapid-growth method. The synthesis tank device was specially designed to synthesize a higher deuterium concentration and high-purity DKDP solution. The deuterium content of the as-grown crystal, which was 97.9%, was determined by two methods, including infrared (IR) spectroscopy and thermo-gravimetric analysis (TGA) measurements. The performances of the 97.9% DKDP crystal, including transmission, absorption coefficient, and laserinduced damage threshold (LIDT) were measured. The results indicate that, in the near-infrared band, the transmission of the 97.9% DKDP crystal is higher than that of KDP and 70% DKDP crystals, and the absorption coefficient is lower. The LIDT of the crystal reached 23.2 J · cm −2 (R-on-1, 1064 nm, 3 ns), which meets the engineering requirements for use in optical applications.

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Characterization of Proton Exchange Layer Profiles in KD₂PO₄ Crystals by Micro-Raman Spectroscopy

Cited by 33 publications

References 7 publications

Effect on scattering of complex morphology of DKDP bulk damage sites

Effect on scattering of complex morphology of DKDP bulk damage sites

Growth, structural and optical properties of 12%‐deuterated KDP crystals

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

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Characterization of Proton Exchange Layer Profiles in KD2PO4 Crystals by Micro-Raman Spectroscopy

Cited by 33 publications

References 7 publications

Effect on scattering of complex morphology of DKDP bulk damage sites

Effect on scattering of complex morphology of DKDP bulk damage sites

Growth, structural and optical properties of 12%‐deuterated KDP crystals

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

Contact Info

Product

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Characterization of Proton Exchange Layer Profiles in KD₂PO₄ Crystals by Micro-Raman Spectroscopy