Additional attenuation type optical cable for sensing

An attenuation-type sensing technology, which is applied in the field of optical cables, can solve the problems of transmission fiber attenuation, affecting the test accuracy of the overall sensing device, etc., and achieves the effects of low additional attenuation change, high practical value, and light weight

Inactive Publication Date: 2012-06-06
XIAN JINHE OPTICAL TECH
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AI Technical Summary

Problems solved by technology

The light source and photodiode are generally located in the test room, and their temperature can be controlled within a certain range, and can be compensated by setting the reference fiber channel. Additional attenuation can seriously affect the test accuracy of the overall sensing device
The optical cable is mainly composed of the transmission fiber, the structure protecting the transmission fiber, the strengthening member, and the outer sheath. Among them, the quartz material part of the transmission fiber has the lowest linear thermal expansion coefficient, and the expansion coefficients of the other parts are also different. Therefore, Changes in temperature cause microbends and bends in the transmission fiber in the cable, resulting in an increase in the additional attenuation of the transmission fiber

Method used

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  • Additional attenuation type optical cable for sensing
  • Additional attenuation type optical cable for sensing
  • Additional attenuation type optical cable for sensing

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Embodiment Construction

[0023] Such as figure 1 The shown additional attenuation optical cable for sensing includes a strengthening member 1, an outer sheath 5, a cylinder 2 and a transmission fiber 4, the cylinder 2 is arranged on the outer surface of the reinforcement 1, and the cylinder 2 Closely combined with the reinforcement 1 and extending longitudinally along the reinforcement 1, the surface of the cylinder 2 has at least one groove 3, and at least one transmission optical fiber 4 is placed in the groove 3, and the protective layer 5 is located on the The outer surface of cylinder 2.

[0024] The reinforcing member 1 is made of non-metallic high-strength fiber, preferably, the reinforcing member 1 is made of aramid fiber, glass fiber, polyparaphenylene benzobisoxazole fiber, ultra-high molecular weight polyethylene or carbon fiber. The cylinder 2 is made of high density polyethylene material. A metal sheath 6 is provided between the column 2 and the outer sheath 5 . The metal sheath 6 is a...

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Abstract

The invention discloses an additional attenuation type optical cable for sensing. The optical cable comprises a reinforcement member, an over sheath, a cylinder and transmission fibers. The cylinder, which is arranged on the external surface of the reinforcement member, is tightly combined with the reinforcement member and extends vertically along the reinforcement member; at least one groove is arranged on the surface of the cylinder and at least one transmission fiber is placed in the groove; and the over sheath is arranged at outer surface of the cylinder. According to the invention, the provided optical cable has advantages of simple structure, reasonable design, low cost, flexible using mode and good using effect; and moreover, changes of additional attenuation of transmission fibers in an optical cable can be effectively eliminated, wherein the changes are caused by an environmental factor. Therefore, the provided optical cable has wide market application prospects.

Description

technical field [0001] The invention relates to an optical cable, in particular to an additional attenuation optical cable for sensing. Background technique [0002] There are many types of fiber optic sensors, among which the intensity-adjustable fiber optic sensor has the advantages of simple structure, reliable operation and low price. But compared with other types of fiber optic sensors, the main disadvantage of intensity modulation fiber optic sensors is that they are susceptible to environmental interference. Among them, the impact of environmental parameters on the sensor is an important aspect. The most common is a change in ambient temperature. The light source, the delivery fiber in the cable, and the photodiode all change with temperature. The light source and photodiode are generally located in the test room, and their temperature can be controlled within a certain range, and can be compensated by setting the reference fiber channel. Additional attenuation ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/44G01D5/26
Inventor 杜兵
Owner XIAN JINHE OPTICAL TECH
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