Zirconium, erbium and ytterbium-doped lithium niobate crystal and preparation method thereof

Abstract

The invention discloses zirconium, erbium and ytterbium-doped lithium niobate crystal and a preparation method thereof, and relates to three-doped LiNbO3 crystal and a preparation method thereof. The problems of low luminous intensity and short lifetime of the conventional erbium-doped lithium niobate crystal are solved. The zirconium, erbium and ytterbium-doped lithium niobate crystal is prepared from five raw materials, namely zirconium oxide, erbium oxide, ytterbium oxide, niobium pentaoxide and lithium carbonate. The method comprises the following steps of: weighing the raw materials, melting the raw materials to obtain a melt, performing crystal growth by adopting a pulling method, annealing, and performing polarization treatment. Compared with an un-doped sample, the emission intensity of the crystal under 1,550nm band light is improved by about 3 times. The 4I13 / 2 energy level life tau of Er<3+> ions of the crystal reaches 4.23ms, is prolonged by 8.18 percent compared with the erbium and ytterbium-doped lithium niobate crystal, and is prolonged by nearly two times compared with the life (2.3ms) of the single Er (1mol%)-doped LiNbO3 crystal. The crystal has good application prospect on the aspects of optical waveguide laser devices and amplifiers.

Description

technical field [0001] The invention relates to a three-doped LiNbO 3 Crystals and methods for their preparation. Background technique [0002] With the soaring demand for Internet access, telecommunication and broadband services, researchers are working on light wave emission. Although light wave emission itself has inherent performance superior to electronic technology, it cannot immediately meet the rapidly growing demands of the system. In order to meet this requirement, more and more research on compact and miniaturized optical components becomes necessary. Existing technologies have successfully developed 1D and 2D optical structures, however, 3D optical structures are still unexploited because volumetric waveguide recording is still difficult to obtain under the current technology. Therefore, the development of multifunctional integrated circuits will make great progress in perfecting and improving effective integration. In fact, the development of multiple functio...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing erbium-doped lithium niobate crystal has poor luminous intensity and service life. The present invention provides a zirconium-erbium-ytterbium tri-doped lithium niobate crystal and its preparation method

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