CN103697879A

CN103697879A - Fiber-optic gyroscope light path

Info

Publication number: CN103697879A
Application number: CN201310715026.XA
Authority: CN
Inventors: 耿一璠; 马西保
Original assignee: Hebei Hanguang Heavy Industry Ltd
Current assignee: Hebei Hanguang Heavy Industry Ltd
Priority date: 2013-12-20
Filing date: 2013-12-20
Publication date: 2014-04-02

Abstract

The invention relates to a fiber-optic gyroscope light path. The fiber-optic gyroscope light path is characterized in that a superfluorescence light source is coupled into a 1*3 optical fiber coupler after passing through an isolator, output superfluorescence is divided into three paths, each path of the output superfluorescence is coupled into first, second and third detectors and first, second and third Y waveguides by virtue of first, second and third 2*2 optical fiber couplers, and the two optical fiber emergent end surfaces of the first, second and third Y waveguides are coupled with two tail fibers of first, second and third optical fiber rings. The fiber-optic gyroscope light path provided by the invention has the advantages that the stability is good, the precision is high, and a fiber-optic gyroscope inertial navigation system has a miniaturization property.

Description

A kind of optical fibre gyro light path

Technical field

The light path that the present invention relates to a kind of optical fibre gyro, is applied to three axis optical fibre gyro.

Background technology

Development along with optical fibre gyro inertial navigation system, optical fibre gyro is widely used, but three single axis fiber gyros that three directions are mutually orthogonal in inertial navigation system, have been used, make like this cost of inertial navigation system higher, size is larger, and in each optical fibre gyro, super-fluorescence light source exists inevitable difference and makes the precision of each optical fibre gyro different, and then has limited the overall precision of optical fibre gyro inertial navigation system.

Summary of the invention

In order to overcome the shortcoming of prior art, the invention provides a kind of optical fibre gyro light path, its good stability, precision is high, can make the miniaturization of optical fibre gyro inertial navigation system.

The present invention solves the technical scheme that its technical matters takes: super-fluorescence light source is coupled into 1 * 3 fiber coupler by isolator, the superfluorescence of output is divided into three tunnels, each road is coupled with first, second, third detector and first, second, third Y waveguide respectively through 2 * 2 first, second, third fiber couplers, two optical fiber outgoing end faces of first, second, third Y waveguide and first, second, third fiber optic loop two pigtail couplings.

The invention enables three mutually orthogonal fiber optic loop to share a super-fluorescence light source, and after super-fluorescence light source, add an isolator, to improve stability and the precision of optical fibre gyro, thereby make the miniaturization of optical fibre gyro inertial navigation system.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 is index path of the present invention.

Embodiment

As shown in Figure 1, super-fluorescence light source 1 is coupled into 1 * 3 fiber coupler 2 by isolator 14, the superfluorescence of output is divided into three tunnels, each road is coupled with first, second,

third detector

3,12,13 and first, second,

third Y waveguide

5,9,10 respectively through 2 * 2 first, second,

third fiber couplers

4,11,15, two optical fiber outgoing end faces of first, second,

third Y waveguide

5,9,10 and 6,7,8 liang of pigtail couplings of first, second, third fiber optic loop.

The light emitting tail fiber of described isolator 14 should with 1 * 3 fiber coupler 2 coupled fiber pattern match.

First, second, third 2 * 2 described

fiber coupler

4,11,15 residue fiber end faces are cut oblique 45 °, in case swash, penetrate.

First, second, third 2 * 2 described

fiber coupler

4,11,15 should enter fine pattern match with first, second,

third Y waveguide

5,9,10.

First, second, third described

Y waveguide

5,9,10 tail optical fibers should with fiber optic loop first, second, third 6,7,8 tail optical fiber pattern match.

Claims

1. an optical fibre gyro light path, it is characterized in that: super-fluorescence light source (1) is coupled into 1 * 3 fiber coupler (2) by isolator (14), the superfluorescence of output is divided into three tunnels, each road is coupled with first, second, third detector (3,12,13) and first, second, third Y waveguide (5,9,10) respectively through 2 * 2 first, second, third fiber couplers (4,11,15), two optical fiber outgoing end faces of first, second, third Y waveguide (5,9,10) and first, second, third fiber optic loop (6,7,8), two pigtail couplings.

2. optical fibre gyro light path according to claim 1, is characterized in that: the light emitting tail fiber of described isolator (14) should with 1 * 3 fiber coupler (2) coupled fiber pattern match.

3. optical fibre gyro light path according to claim 1, is characterized in that: first, second, third 2 * 2 described fiber coupler (4,11,15) residue fiber end face is cut oblique 45 °.

4. optical fibre gyro light path according to claim 1, is characterized in that: first, second, third 2 * 2 described fiber coupler (4,11,15) should enter fine pattern match with first, second, third Y waveguide (5,9,1) 0.

5. optical fibre gyro light path according to claim 1, is characterized in that: first, second, third described Y waveguide (5,9,10) tail optical fiber should with fiber optic loop first, second, third (6,7,8) tail optical fiber pattern match.