Y-shaped titanium diffused lithium niobate phase modulator and optical fiber current transformer

Abstract

The invention relates to a Y-shaped titanium diffused lithium niobate phase modulator and an optical fiber current transformer. The Y-shaped titanium diffused lithium niobate phase modulator comprises lithium niobate crystals, a Y-shaped optical waveguide element, a first bar-shaped optical waveguide element, a second bar-shaped optical waveguide element and an electrode element. The Y-shaped optical waveguide element, the first bar-shaped optical waveguide element and the second bar-shaped optical waveguide element are arranged on the lithium niobate crystals by using the titanium diffusion technology. The first bar-shaped optical waveguide element is connected with one beam splitting end of the Y-shaped optical waveguide element. The second bar-shaped optical waveguide element is connected with another beam splitting end of the Y-shaped optical waveguide element. The electrode element comprises a first ground electrode and a first modulation electrode which are arranged on the first bar-shaped optical waveguide element and a second ground electrode and a second modulation electrode which are arranged on the second bar-shaped optical waveguide element. The degree of integration can be enhanced, the cost can be saved and the process difficulty can be reduced so that the standard of double requirements can be met in the actual application of the FOCT product, and popularization and application of the optical fiber current transformer are facilitated.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to a novel Y-type titanium diffusion lithium niobate phase modulator and an optical fiber current transformer using the Y-type titanium diffusion lithium niobate phase modulator. Background technique [0002] The phase modulator is an important optical device in the optical path of the fiber optic current transformer. The phase modulator is usually made of lithium niobate (LiNbO 3 ) phase modulators, especially strip-type titanium (Ti) diffused lithium niobate (LiNbO 3 ) phase modulator is one of the most typical schemes in the optical circuit design of fiber optic current transformer (FOCT). Its optical path is mainly composed of SLD light source, light splitting device, polarizer, strip type titanium diffused lithium niobate phase modulator, photodetector and other optical devices, such as figure 1 As shown, it includes a light source 1, a light splitting device 2, a ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the existing strip type Ti diffusion LiNbO 3 The high cost of the phase modulator hinders the promotion and application of fiber optic current transformers to meet the dual requirements. A Y-type titanium-diffused lithium niobate phase modulator is provided, which integrates a Y-type optical waveguide element and two strip-type optical waveguide elements. Improve integration, save costs, reduce process difficulty, help FOCT products meet the dual requirements of the actual application standard, and promote the popularization and application of optical fiber current transformers

Images