ASE light source for three-axis optical fiber gyroscope

A fiber optic gyroscope and light source technology, applied in Sagnac effect gyroscopes, gyroscopes/steering sensing equipment, instruments, etc., can solve problems such as intensity noise suppression, achieve improved accuracy, strong adaptability, and convenient engineering implementation Effect

Active Publication Date: 2021-03-26
ZHEJIANG LAB +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to make up for the deficiencies of the prior art, to provide an ASE light

Method used

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  • ASE light source for three-axis optical fiber gyroscope

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Example Embodiment

[0039] Example one

[0040] Bonded below figure 1 The present invention will be described in detail.

[0041] Such as figure 1 As shown, a three-axis optical fiber gyroscope according to the present invention includes a 980 nm pump laser 1, 980 nm wavelength 3 × 3 coupler 2, a first wavelength division multiplexer 3, a second wavefront multiplexer 4, Third wavefront multiplexer 5, first erbium-doped fiber 6, a second doped fiber 7, a third doped fiber 8, a first isolator 9, a second isolator 10, a third isolator 11, 1550 nm wavelength 3 × 3 coupler 12 is connected to the fiber welding.

[0042] Among them, the 980 nm pump laser 1 is connected to the B port of the 980 nm wavelength 3 × 3 coupler 2,

[0043] 980 nm wavelength 3 × 3 X 3 X 3 × 3 × 3 A and C port doing folding treatment,

[0044] The D port of the 980nm wavelength 3 × 3 coupler 2 is connected to the B port of the first wavefront fixture 3,

[0045] The E-port of the 980 nm wavelength 3 × 3 coupler 2 is connected to t...

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Abstract

The invention discloses an ASE light source for a three-axis optical fiber gyroscope. A plurality of sections of independent erbium-doped optical fibers share a 980nm pump laser through a 980nm wavelength coupler, the erbium-doped optical fibers are divided into at least three sections, and at least 3 * 3ports are included in the coupler ; a b port of the multi-section independent erbium-doped optical fiber is subjected to fiber folding treatment, or is connected with a reflecting mirror to form a two-way ASE light source; a 1550nm wavelength coupler is adopted to carry out wave summation on light waves output by a plurality of sections of independent erbium-doped optical fibers and then divide the light waves into a plurality of beams of light waves, so that the spectral width of the output light waves is increased, the relative intensity noise of the optical fiber gyroscope is further inhibited, and the 1550nm wavelength coupler at least includes 3 * 3ports. The integration degree ofthe light source for the three-axis gyroscope can be improved, the cost can be reduced, multiple paths of independent erbium-doped optical fiber output light waves are subjected to wave summation through the coupler and then are divided into multiple beams of output light waves, the equivalent spectral width of the light waves of the input light source of the optical fiber gyroscope is increased,suppression of relative intensity noise of the optical fiber gyroscope is achieved, and the detection precision is improved.

Description

technical field [0001] The invention belongs to the technical field of fiber optic gyroscopes, and in particular relates to an ASE light source for a three-axis fiber optic gyroscope. Background technique [0002] In fiber optic gyroscopes, the use of erbium-doped fiber light sources based on amplified spontaneous emission (Amplified Spontaneous Emission, ASE) can suppress back reflection and scattering noise in the fiber ring, and optical Kerr effect noise. The main noise sources of fiber optic gyroscopes include shot noise, thermal noise, correlated intensity noise, signal sampling and quantization noise, etc. By increasing the optical power of the light source and the gain of the preamplifier, thermal noise and quantization noise can be greatly suppressed. [0003] In the fiber optic gyroscope, the amplitude of the useful signal is proportional to the power of the light source, the magnitude of the shot noise is proportional to the square root of the optical power of the...

Claims

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Application Information

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IPC IPC(8): G01C19/72
CPCG01C19/721G01C19/725
Inventor 杨志怀胡慧珠刘铭
Owner ZHEJIANG LAB
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