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Optical fibre acceleration sensor based on ultra- short cavity optical fibre laser

A technology of acceleration sensor and fiber laser, which is applied to lasers, laser components, and acceleration measurement using inertial force, etc., can solve the problems that the sensitivity and dynamic range cannot reach a higher level, and the bandwidth of reflected light cannot be further reduced. Good effect of improving dynamic range, electrical insulation and safety

Inactive Publication Date: 2008-09-10
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

Since the reflected light bandwidth of the fiber grating cannot be further narrowed (about 0.1nm), the resolution of the matching wavelength detection is only sub-pm level. Although various sensitivity enhancement measures have been taken, the sensitivity and dynamic range cannot reach a higher level. high level

Method used

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  • Optical fibre acceleration sensor based on ultra- short cavity optical fibre laser
  • Optical fibre acceleration sensor based on ultra- short cavity optical fibre laser
  • Optical fibre acceleration sensor based on ultra- short cavity optical fibre laser

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Embodiment Construction

[0037] Taking the DBR fiber optic laser acceleration sensor as an example, the measurement principle, specific structure and implementation of the present invention will be further described in conjunction with the accompanying drawings.

[0038] see figure 1 , figure 2 Shown, a kind of fiber acceleration sensor based on ultrashort cavity fiber laser of the present invention comprises:

[0039] A cantilever beam of equal strength 5, the cantilever beam of equal strength 5 is an isosceles triangle, which converts the inertial force at the end into a uniform strain on the surface;

[0040] An inertial mass 6, which is fixed on the end of the equal-strength cantilever beam 5, for generating inertial force;

[0041] A fiber laser 8, the fiber laser 8 is fixed on the central axis above the equal-intensity cantilever beam 5, so as to convert the strain on the cantilever beam into the change of laser lasing wavelength.

[0042] Wherein said fiber laser is a DBR type fiber laser 8...

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Abstract

The invention relates to an optical fiber acceleration sensor based on an ultrashort cavity optical fiber laser, which is characterized by comprising: an equal strength socle beam which is an isoceles triangle and can convert an end inertia force into an even strain on the surface; an inertial quality block which is fixed on one end of the equal strength socle beam to produce inertia forces; and an optional fiber laser which is fixed on the central axis line above the equal strength socle beam to convert the strain into the change of the lasing wavelength of the laser.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, and specifically relates to an optical fiber acceleration sensor based on an ultra-short-cavity fiber laser as a core component, which is suitable for the measurement of micro-vibrations in the industrial and military fields, as well as high-speed sensors in the fields of earthquake monitoring and large-scale building monitoring. Accuracy testing and calibration, metrology. Background technique [0002] Acceleration sensor is an important sensor commonly used in anti-shock, anti-vibration measurement, earthquake monitoring, inertial navigation and guidance systems of ordnance, vehicles, ships, etc. The working principle of the inertial accelerometer is to set a mass block in the inertial space to sense the inertial force or displacement generated when the measured object is accelerated, and the corresponding acceleration can be measured by measuring the inertial force or displacement. Tradit...

Claims

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Application Information

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IPC IPC(8): G01P15/03H01S3/00H01S3/067
Inventor 王永杰李芳刘育梁
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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