Reduced-Pressure Melts Growth of the Vacuum Ultraviolet Double Frequency Crystal KBe2BO3F2 (KBBF)

A reduced-pressure melts growth method was first presented to grow the vacuum ultraviolet double frequency crystal KBe2BO3F2 (KBBF). The bulk KBBF crystal, with a dimension of about 11mm×10mm×5mm, has been grown successfully, and the grown crystal exhibits a high optical homogeneity except for the seed zone. The optical transmittance spectrum of the grown KBBF crystal was measured and it indicated that the high-frequency absorption edge is observed at 160nm, the transmittance is up to about 70% between 250nm and 400nm. The results show that the reduced-pressure melts growth is a promising growth method for bulk KBBF crystal and the grown KBBF crystal is possible for applying as a frequency-doubling device for the vacuum ultraviolet region.

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Oriented Reduced-Pressure Melts Growth of the Vacuum Ultraviolet Double Frequency Crystal KBe2BO3F2

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.313-314.86 ◽

2013 ◽

Vol 313-314 ◽

pp. 86-88

Author(s):

Wen Li Wang

Keyword(s):

Vacuum Ultraviolet ◽

Second Harmonic ◽

Frequency Doubling ◽

Optical Transparency ◽

Ultraviolet Region ◽

Reduced Pressure ◽

Double Frequency ◽

Growth Method ◽

Doubling Method ◽

Experimental Researches

A bulk vacuum ultraviolet double frequency crystal KBe2BO3F2(KBBF) crystal has been grown successfully by using a method of oriented reduced-pressure melts growth, and the optical properties of the grown crystal, such as optical transparency and the second harmonic efficiency, were also measured. The results show that the high-frequency absorption edge is observed at 150nm and the optical transparency was up to 75% in the spectral range between 250nm and 400nm. The second harmonic efficiency was measured with an outer cavity frequency-doubling method and its maximal value was about 68.5%. The experimental researches indicate that the oriented reduced-pressure melts growth is a promising growth method for bulk KBBF crystal and it is possible for applying as a frequency-doubling device for the vacuum ultraviolet region.

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Spectral characteristics of high-frequency discharges in hydrogen and inert gases in the vacuum ultraviolet region

Journal of Applied Spectroscopy ◽

10.1007/bf00612286 ◽

1976 ◽

Vol 24 (2) ◽

pp. 238-240

Author(s):

B. G. Dzantiev ◽

O. G. Maleeva ◽

A. V. Shishkov

Keyword(s):

High Frequency ◽

Vacuum Ultraviolet ◽

Spectral Characteristics ◽

Inert Gases ◽

Ultraviolet Region ◽

Vacuum Ultraviolet Region

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The Synthesis of the Novel Vacuum Ultraviolet Double Frequency Crystal KBe2BO3F2 (KBBF)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1004-1005.348 ◽

2014 ◽

Vol 1004-1005 ◽

pp. 348-353

Author(s):

Yao Wen Ban ◽

Wen Li Wang ◽

Wei Zhang ◽

Jian Han

Keyword(s):

Crystal Size ◽

Vacuum Ultraviolet ◽

Critical Factor ◽

Raw Material ◽

Phase Matching ◽

The Novel ◽

Reduced Pressure ◽

Double Frequency ◽

Growth Method ◽

Growth Methods

KBe2BO3F2 (KBBF) crystal is a sole important and practical ultraviolet nonlinear optical material. It can realize the output of vacuum ultraviolet laser below 200nm with the method of phase-matching. However, it is difficult to grow a practical crystal size with the general growth methods such as fluxed melts, hydrothermal or prism-coupling technique because of the layering growth habit. A reduced-pressure melts growth method was presented to grow bulk KBBF crystal and how to achieve the high quality raw material for growth is a critical factor. In this paper, the influences of syntheses methods of raw material and experiment conditions were discussed, and the best syntheses method was selected.

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