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Photon infusion saturated absorption mode-locking type optical fiber laser peg-top

A fiber laser and optical fiber technology, applied in the field of optical gyroscope, can solve the problems of complex laser gyroscope technology and high cost

Inactive Publication Date: 2008-04-30
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the process of laser gyroscope is complicated and the cost is higher than that of fiber optic gyroscope.

Method used

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  • Photon infusion saturated absorption mode-locking type optical fiber laser peg-top
  • Photon infusion saturated absorption mode-locking type optical fiber laser peg-top
  • Photon infusion saturated absorption mode-locking type optical fiber laser peg-top

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The working process of the present invention is as figure 1 and image 3 Shown:

[0013] The erbium-doped gain fiber (8) is excited by the 980nm wavelength pump light input by the wavelength division multiplexer (2) to generate a broadband laser with a center wavelength of 1550nm and a spectral line width of 40nm. Clockwise (CW) direction and counterclockwise (CCW) direction transmission. When the object rotates at a certain angular rate Ω, the two laser beams transmitted clockwise and counterclockwise in the ring will produce a frequency shift Δv in the opposite direction under the action of the Sagnac effect, which is coupled by a polarization-maintaining fiber coupler (9) to make A beat frequency is generated between the two output laser signals, and the photodetector (10) is connected to detect the difference frequency signal, and the rotational angular rate value Ω of the object is calculated. The measurement accuracy of the fiber laser gyroscope angular rate is...

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Abstract

The invention relates to an optical gyroscope, in particular to a fiber laser gyroscope. It consists of an ultra-narrow linewidth fiber mode-locked laser, a wavelength division multiplexer, a fiber Sagnac loop, a circulator, a polarizer and a detector, and a difference frequency signal processing circuit. It is characterized in that it uses a semiconductor pump with a pigtail Active fiber ring laser with Sagnac effect composed of laser, isolator, wavelength division multiplexer and gain fiber; two sets of fiber coupler, circulator, ultra-narrow linewidth photon injection fiber mode-locking device, polarizer and detector The mode selection filter output system composed of the device forms the optical path scheme of the fiber laser gyroscope. The photon injection fiber mode-locking technology introduced in the present invention can make the gyroscope work stably in the ultra-narrow linewidth single longitudinal mode laser state, thereby obtaining the high-resolution detection result of the angular rate; The difference can automatically eliminate the zone-locking effect of the laser gyro. As a high-precision gyroscope, the invention can be applied to inertial measurement units of aviation, spaceflight, navigation and land weapons.

Description

Technical field: [0001] The invention relates to an optical gyroscope, in particular to a fiber laser gyroscope. Background technique: [0002] The inertial navigation unit (INS) is a key component to realize automatic navigation, positioning, orientation, and stabilization system, and the gyroscope is the core device for measuring angular rate. The optical gyroscope has no rotating parts, is not affected by the gravity of the earth, can achieve high precision or large dynamic range, has good anti-vibration performance, is less affected by electromagnetic fields, does not need to warm up, has short start-up time, and has the advantages of convenient strap-down. Small size, low cost, and its overall performance has more advantages than mechanical gyroscopes, electrostatic gyroscopes, and magnetoelectric gyroscopes. Optical gyroscopes, mainly represented by fiber optic gyroscopes and laser gyroscopes, have developed rapidly in the past ten years and have become mainstream pro...

Claims

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Application Information

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IPC IPC(8): G01C19/72G01C21/18
Inventor 陈淑芬李伟明付雷杜丽辉张明孟彦彬
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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