Phase-matched UV generation at 0.1774 μm in KB5O8
· 4H2O

N. Umemura; K. Kato

doi:10.1364/AO.35.005332

Applied Optics
Vol. 35,
Issue 27,
pp. 5332-5335
(1996)
•https://doi.org/10.1364/AO.35.005332

Phase-matched UV generation at 0.1774 μm in KB₅O₈ · 4H₂O

N. Umemura and K. Kato

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N. Umemura and K. Kato, "Phase-matched UV generation at 0.1774 μm in KB₅O₈ · 4H₂O," Appl. Opt. 35, 5332-5335 (1996)

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Abstract

Sixth-harmonic generation of the Nd:YAG laser frequency at 1.0642 μm has been achieved in KB₅O₈ · 4H₂O by type-1 mixing the fundamental and fifth harmonic at room temperature. The phase-matching angles were measured to be (θ = 90°, ϕ = 68.5 ± 0.5°) and (θ = 80.0 ± 0.5°, ϕ = 90°) in the x–y and y–z planes, respectively. Improved Sellmeier equations of this crystal are presented.

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Wavelength (μm)^a			Phase-Matching Angles (θ, ϕ)		Refs.

λ₁	λ₂	λ₃	Calculated	Observed
0.4342^z	0.4342^z	0.2171^x	(90°, 90°)	(90°, 90°)	8
0.4796^z	0.4796^z	0.2398^y	(90, 0)	(90, 0)	8
0.6943^y^–^z	0.6943^y^–^z	0.3472^x	(24.9, 90)	(26.5, 90)	17
0.5145^y^–^z	0.5145^y^–^z	0.2573^x	(50.3, 90)	(50.2, 90)	17
0.4880^y^–^z	0.4880^y^–^z	0.2440^x	(56.8, 90)	(56.6, 90)	17
0.4765^y^–^z	0.4765^y^–^z	0.2383^x	(60.3, 90)	(60.2, 90)	17
0.4597^y^–^z	0.4597^y^–^z	0.2299^x	(67.4, 90)	(67.2, 90)	17
1.0795^y^–^z	0.2699^y^–^z	0.2159^x	(79.9, 90)	(80, 90)^b	13
0.5398^y^–^z	0.3598^y^–^z	0.2159^x	(50.0, 90)	(50.4, 90)^b	13
1.0642^y^–^z	0.2660^y^–^z	0.2128^x	(51.5, 90)	(53 ± 1, 90)	7
0.7550^z	0.2660^z	0.1967^x	(90, 90)	(90, 90)	14
0.7910^z	0.2573^z	0.19415^x	(86.6, 90)	(90, 90)	15
0.9039^z	0.2334^z	0.1855^x	(90, 90)	—	16
1.0642^z	0.2128^z	0.1774^x^–^y	(90, 68.3)	(90, 68.5 ± 0.5)
1.0642^y^–^z	0.2128^y^–^z	0.1774^x	(79.5, 90)	(80.0 ± 0.5, 90)

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Applied Optics