JPS5515105A - Non-linear optical device - Google Patents

Abstract

PURPOSE:To lower driving voltage, reduce electrode capacity and perform high speed operation and high speed controlling by performing light parametric mutual action within an optical guide and further applying voltage to the optical guide thereby changing phase matching conditions and controlling wavelengths. CONSTITUTION:The optical guide is made as a region 3 where refractive index is high within a crystal substrate 2. Light parametric oscillation takes place within the light resonator constituted by the optical guide 3 and the reflecting mirror 4 made at the end face of the optical guide 3. Voltage is applied to the electrodes 1, 1' on both sides of the optical guide 3, whereby their phase matching conditions may be controlled. Ordinarily, the width of the optical guide 3 is several tens mum or under and therefore the inter-electrode spacing D may be also made to the same extent, whereby driving voltage may be lowered. In addition, the feasibility of making the electrode area smaller enables capacity to be reduced and high speed operation and high speed control to be performed.