All-fiber current transformer with integrated light path and manufacturing process thereof

Abstract

The invention relates to an all-fiber current transformer with an integrated light path and a manufacturing process thereof. The all-fiber current transformer comprises a photoelectric light path integrated module and a modulation light path integrated module which are connected with each other. When the photoelectric light path integrated module and the modulation light path integrated module are on different substrates, the photoelectric light path integrated module and the modulation light path integrated module are two modules encapsulated separately, and the output tail fiber of the photoelectric light path integrated module and the input tail fiber of the modulation light path integrated module are fusion-welded at 0 degree. When the photoelectric light path integrated module and the modulation light path integrated module are on the same substrate, a modulation light path integrated module assembly without an encapsulation shell is arranged in the direction of the output optical axis of a third collimator adhered to the end face of a splitting prism to form a spatial light path, and the photoelectric light path integrated module and the modulation light path integrated module are integrally encapsulated. The all-fiber current transformer of the invention has the advantages of high signal-to-noise ratio, small size, easy installation, and low production cost.

Description

technical field [0001] The invention relates to the technical field of current transformers, in particular to a novel all-optical fiber current transformer with modularized and integrated optical paths and a manufacturing process thereof. Background technique [0002] The current transformer plays the role of accurate and fast measurement of current in the power grid. It is the core equipment of the smart grid. The all-fiber-optic current transformer based on the Faraday magneto-optical effect can realize non-intrusive sensing and measurement of high-voltage current. It is a high-voltage electronic current transformer. The main development direction of the transformer. At present, the optical path of the mainstream all-fiber current transformer (FOCT) in China is composed of optical devices such as light sources, beam splitters, polarizers, straight waveguides (or Y waveguides), and photodetectors that are separated from each other and have independent packaging shells. , a...

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Problems solved by technology

[0007] Aiming at the problems of too many welding points, low signal-to-noise ratio, complex process, poor reliability and high production cost in the existing optical path design scheme of all-fiber current transformer, the present invention provides a new manufacturing process of all-fiber current transformer , realizing the modular and integrated optical path design of all-fiber current transformers, with the advantages of high signal-to-noise ratio, small size, easy installation and low production cost

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