Optical fiber laser detector capable of being used on land and underwater

A fiber laser and fiber laser technology, applied in seismic signal receivers, etc., to eliminate the influence of hydrostatic pressure, reduce lateral sensitivity, and reduce volume

Inactive Publication Date: 2011-04-20
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of this, the main purpose of the present invention is to provide a fiber laser detector that can be used on

Method used

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  • Optical fiber laser detector capable of being used on land and underwater
  • Optical fiber laser detector capable of being used on land and underwater
  • Optical fiber laser detector capable of being used on land and underwater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Please refer to figure 1 , Figure 6-12 , the fiber laser detector that can be used on land and underwater includes: a main body tube 10 for installing a diaphragm 60 and a mass block 50; an extension tube 20 for reserving enough space for the fiber laser 40 and compressing the diaphragm 60; the end cap 30 is used to protect the inside of the sensor, draw out the laser 40, and fix one end of the fiber laser 40; the fiber laser 40 is used to detect seismic wave signals; two diaphragms 60 are used as limiting elements to control the detector Frequency response characteristics and sensitivity, and limit the lateral displacement of the mass block 50 to reduce the lateral sensitivity of the geophone; the mass block 50 installed between the diaphragms 60, as an inertial element, is used to increase the fiber laser 40 caused by the seismic wave signal axial strain, and fix the other end of the fiber laser 40; the hole 63 on the diaphragm 60 is used to communicate with various...

Embodiment 2

[0064] Please refer to figure 2 , Figure 6-12 , the fiber laser detector that can be used on land and underwater includes: a main body tube 10 for installing a diaphragm 60 and a mass block 50; an extension tube 20 for reserving enough space for the fiber laser 40 and compressing the diaphragm 60; the end cap 30 is used to protect the inside of the sensor, draw out the laser 40, and fix one end of the fiber laser 40; the fiber laser 40 is used to detect seismic wave signals; two diaphragms 60 are used as limiting elements to control the detector Frequency response characteristics and sensitivity, and limit the lateral displacement of the mass block 50 to reduce the lateral sensitivity of the geophone; the mass block 50 installed between the diaphragms 60, as an inertial element, is used to increase the fiber laser 40 caused by the seismic wave signal axial strain, and fix the other end of the fiber laser 40; the hole 63 on the diaphragm 60 is used to communicate with variou...

Embodiment 3

[0078] Please refer to Figure 4 , Figure 6-12 , the fiber laser detector that can be used on land and underwater includes: a main body tube 10 for installing a diaphragm 60 and a mass block 50; an extension tube 20 for reserving enough space for the fiber laser 40 and compressing the diaphragm 60; the end cap 30 is used to protect the inside of the sensor, draw out the laser 40, and fix one end of the fiber laser 40; the fiber laser 40 is used to detect seismic wave signals; two diaphragms 60 are used as limiting elements to control the detector Frequency response characteristics and sensitivity, and limit the lateral displacement of the mass block 50 to reduce the lateral sensitivity of the geophone; the mass block 50 installed between the diaphragms 60, as an inertial element, is used to increase the fiber laser 40 caused by the seismic wave signal axial strain, and fix the other end of the fiber laser 40; the hole 63 on the diaphragm 60 is used to communicate with variou...

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Abstract

The invention discloses an optical fiber laser detector capable of being used on land and under water, comprising a main body cylinder, a liner cylinder, an extended cylinder, a static vent, an end cover and an optical fiber laser; the main body cylinder is internally provided with at least two diaphragms and at least a mass block, and the mass block is arranged between the two diaphragms; the liner cylinder is arranged on the inner surface of the main body cylinder, which is used for supporting the diaphragms; the extended cylinder is connected with the main body cylinder, which is used for holding enough space for the optical fiber laser and for compacting the diaphragms; the static venti s opened on one side wall of the extended cylinder and is used for communicating the inside of the detector with the outside and for balancing static pressure; the end cover is arranged at the end part of the extended cylinder, and is used for protecting the inside of a sensor, extracting the laserand fixing one end of the optical fiber laser; one end of the optical fiber laser is fixed on the end cover, the other end passes through the extended cylinder, the diaphragms and the mass block to be fixed on one end of the mass block, and the optical fiber laser is used for detecting earthquake wave signals. Using the invention, the volume of the detector is reduced, the transverse sensitivity is reduced, and the influence of hydrostatic pressure is eliminated.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to an optical fiber laser detector that can be used on land and underwater. Background technique [0002] Compared with the corresponding conventional sensors, fiber optic sensors have obvious advantages in terms of sensitivity, dynamic range, and reliability. They are particularly prominent in the fields of national defense and military applications, and are listed as key national defense technologies by many countries. [0003] The optical fiber detector is an instrument that uses the light transmission characteristics of the optical fiber and various modulation effects generated by its interaction with the surrounding environment to detect seismic wave signals on the surface, underground, and in liquids. Compared with traditional piezoelectric sensors, it has the following main advantages: wide frequency band, high sound pressure sensitivity, no electromagnetic inte...

Claims

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Application Information

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IPC IPC(8): G01V1/18
Inventor 张文涛李学成张发祥李芳刘育梁
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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