High efficiency second-harmonic generation in KNbO<sub>3</sub> crystals期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

High efficiency second-harmonic generation in KNbO₃ crystals

Authors:	J.-C. Baumert P. Günter H. Melchior

Affiliation:	1. Laboratory of Solid State Physics Swiss Federal Institute of Technology, ETH-Hoenggerberg, CH-8093 Zurich, Switzerland;2. Institute of Applied Physics Swiss Federal Institute of Technology, ETH-Hoenggerberg, CH-8093 Zurich, Switzerland

Abstract:	Second-harmonic generation in KNbO₃ crystals has been studied with CW and pulsed Al_xGa_1?xAs and dye lasers. High conversion efficiencies were obtained by noncritical Type I phase-matching at room temperature for the wavelength λ_PM = (860±2) nm using the nonlinear optical coefficient d₃₂ = 21 pm/V. The measured peak power was P_2ω=13.6 μW for a fundamental power P_ω=21 mW with a crystal of l = 8.97 mm in length. The phase-matching wavelength in the orthorhombic phase of KNbO₃ can be temperature tuned between 838 nm (for T = -36°C) and 950 nm (for T = +180°C).

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