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All-fiber mode converter and light system

A mode converter, all-fiber technology, applied in optical waveguides, light guides, optics, etc., can solve problems such as inability to achieve mode coupling, achieve high conversion efficiency, low conversion noise, and achieve simple effects

Active Publication Date: 2015-04-01
WUHAN RAYCUS FIBER LASER TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, this method cannot achieve 100% mode coupling, that is, the fundamental mode and higher-order modes propagate together in the fiber and generate noise

Method used

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  • All-fiber mode converter and light system

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Embodiment Construction

[0047] The present invention will be further described in conjunction with the accompanying drawings.

[0048] Such as figure 1 As shown, the optical system of the all-fiber mode converter of the present invention includes an input fiber 10, two mode field matchers (20, 40), an all-fiber mode converter (30), an output fiber (50), and an input fiber (10 ), the first mode field matcher (20), the all-fiber mode converter (30), the second mode field matcher (40), and the output fiber (50) are welded together in sequence to achieve the purpose of mode conversion. The first propagation mode is transmitted to the all-fiber mode converter (30) with the lowest loss through the first mode field matcher (20) from the input fiber 10, and only the first fiber mode converter (30) exists in the fiber after passing through the all-fiber mode converter (30). The two propagation modes are then passed through the second mode field matcher (40) to transmit the second propagation mode to the outp...

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Abstract

The invention relates to an all-fiber mode converter and a light system. The all-fiber mode converter comprises a mode coupling fiber portion and a fiber portion of a mode peeler which are connected, a light system structure of the all-fiber mode converter comprises an input fiber, a first mode field adapter, an all-fiber mode converter, a second mode field adapter and an output fiber which are sequentially welded to realize mode conversion, a first spreading mode is transmitted from the input fiber through the first mode field adapter to the all-fiber mode converter at the lowest loss rate, and only a second spreading mode exists after the all-fiber mode converter, and the second spreading mode is transmitted through the second mode field adapter to the output fiber at the lowest loss rate for output. The all-fiber mode converter is for fiber mode conversion and further has advantages of easy realization, high conversion efficiency and small conversion noise.

Description

technical field [0001] The invention relates to an all-fiber mode converter and an optical system. Background technique [0002] Optical fiber is a kind of fiber made of glass or plastic, which uses the principle of total reflection of light as a tool for light transmission. The bare fiber of the optical fiber is generally divided into three layers: the center is a high refractive index glass core, the middle is a low refractive index silica glass cladding, and the outermost is a resin coating for reinforcement. The optical signal is confined to be transmitted in the core, for this reason, the core refractive index n 1 be greater than the refractive index n of the fiber cladding 2 . [0003] A graph that plots the index of refraction against fiber radius is often referred to as a refractive index profile. Generally, there are stepped refractive index distribution, trapezoidal refractive index distribution, triangular refractive index distribution and so on. According to...

Claims

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Application Information

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IPC IPC(8): G02B6/14G02B6/24
CPCG02B6/02023G02B6/02261G02B6/14
Inventor 祝启欣施建宏
Owner WUHAN RAYCUS FIBER LASER TECHNOLOGY CO LTD
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