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All-optical-fiber adjustable optical attenuator

A dimming attenuation, fiber-optic technology, applied in light guides, optics, instruments, etc., can solve the problems of complex structure, low mechanical performance, and high mechanical performance requirements of optical attenuators, and achieve low mechanical performance requirements, simple manufacture, and low cost Effect

Active Publication Date: 2015-06-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing optical attenuator with complex structure and high mechanical performance requirements, the present invention provides an all-fiber adjustable optical attenuator with simple structure and low mechanical performance requirements

Method used

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] refer to figure 1 and figure 2 , an all-fiber tunable optical attenuator, used to quantitatively attenuate the optical power of the input signal, such as figure 1 shown, including:

[0016] A single-mode optical fiber 100 for receiving signal light;

[0017] A first multimode optical fiber 101 that is connected to the single-mode optical fiber, receives the signal light output by the single-mode optical fiber, removes the coating layer and cladding in advance, and re-coats the polymer;

[0018] The second multimode optical fiber 102 connected with the first multimode optical fiber, receives the signal light output by the first multimode optical fiber and outputs it.

[0019] The polymer 103 coated on the surface of the first multimode optical fiber.

[0020] A circular sleeve 104 for temperature control, for placing and fixing the first multimode optical f...

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Abstract

An all-optical-fiber adjustable optical attenuator comprises a single-mode optical fiber, a first multi-mode optical fiber, a second multi-mode optical fiber and a sleeve. The single-mode optical fiber is used for receiving signal light; the first multi-mode optical fiber is used for receiving the signal light output by the single-mode optical fiber, a coating layer and a cladding of the first multi-mode optical fiber are removed, and the first multi-mode optical fiber is coated with a polymer again; the second multi-mode optical fiber is used for receiving and outputting the signal light output by the first multi-mode optical fiber; the sleeve is used for placing the first multi-mode optical fiber. The refractive index of the polymer is larger than that of a fiber core of the first multi-mode optical fiber, one end of the single-mode optical fiber is connected with one end of the first multi-mode optical fiber, the other end of the first multi-mode optical fiber is connected with one end of the second multi-mode optical fiber, the other end of the second multi-mode optical fiber is a signal light output end, the other end of the single-mode optical module is a signal light input end, the optical axis of the single-mode optical fiber, the optical axis of the first multi-mode optical fiber and the optical axis of the second multi-mode optical fiber are located on the same straight line, the first multi-mode optical fiber is located in the sleeve, and a temperature control device used for adjusting the temperature in the sleeve is arranged outside the sleeve. The structure of the optical attenuator is simplified, and the requirement for mechanical performance is low.

Description

technical field [0001] The invention relates to the technical fields of optical fiber communication and optical fiber sensing, in particular to an all-fiber adjustable optical attenuator. Background technique [0002] Optical attenuator is an important passive device used to attenuate optical power, and has important applications in the fields of optical communication and optical sensing. It can be used in signal attenuation of communication system, index measurement of optical fiber system and system test and other occasions. According to different working principles, the current optical attenuators can be divided into displacement optical attenuators, attenuation sheet optical attenuators, and photoelectric conversion optical attenuators, etc., but these optical attenuators generally have complex structures and high mechanical performance requirements. question. Contents of the invention [0003] In order to overcome the shortcomings of the existing optical attenuator ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/26
CPCG02B6/266
Inventor 薛林林任宏亮覃亚丽
Owner ZHEJIANG UNIV OF TECH
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