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Interference type optical fiber gyroscope based on MZ interference principle

A fiber optic gyroscope and interferometric technology, which is applied to steering sensing equipment and other directions, can solve problems such as low optical power utilization, low signal-to-noise ratio, and interference, and achieve the effects of high cost performance, high sensitivity, and stable performance

Inactive Publication Date: 2004-08-18
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the disadvantages of low optical power utilization rate of the traditional interference fiber optic gyroscope, interference caused by the transmission of interference light and forward light in the same optical path, and low signal-to-noise ratio, and to provide an MZ interference-based The principle of interferometric fiber optic gyroscope, the gyroscope adopts the MZ interference principle which is different from the Sagnac interference principle, its forward transmission light path and interference light path are independent, there is no interference between them, and there is no multiple optical branching. power loss

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  • Interference type optical fiber gyroscope based on MZ interference principle
  • Interference type optical fiber gyroscope based on MZ interference principle
  • Interference type optical fiber gyroscope based on MZ interference principle

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[0044] specific implementation

[0045] refer to figure 1 , is a schematic structural diagram of a single-axis MZ interferometric fiber optic gyroscope according to an embodiment of the present invention. The present invention adopts the principle of M-Z interference with two-arm symmetrical ring optical fiber (non-resonant type), which is completely different from the principle of Sagnac interference type fiber optic gyroscope and resonant type fiber optic gyroscope. Laser light 1 with a wavelength of 0.8 μm to 1.6 μm emitted from the LD semiconductor laser enters the single-mode fiber F 1 After being 3db beam splitter 2SB 1 After splitting, the beams are sent to two optical fiber signal arms S with exactly the same length 1 Ports 1, 1' and S 2 In ports 2 and 2′, the two optical fiber signal arms are wound into an optical fiber coil 3 with the same center of circle and the same diameter D in the same winding method, and the optical signals are respectively transmitted fr...

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Abstract

The invention relates to an interference type optical fiber gyro based on principle of MZ interference, wherein the gyroscopic instrument comprises an illuminating source, a beam divider, an optical supervisory instrument, and an optical fiber sensor coil composed of two optical fiber arms of MZ interference, wherein the light from the light source is connected to the starting terminal and ending terminal of the two optical fiber arms on the optical fiber coils after the beam divider. The forward conduction optical path is separate from the intervened optical path, thus no interference is resulted.

Description

technical field [0001] The invention relates to a fiber optic gyroscope, in particular to an interference fiber optic gyroscope based on the MZ interference principle. Background technique [0002] Fiber optic gyroscope is a new type of all-solid-state inertial instrument without mechanical rotor. It has broad application prospects in aerospace, aviation, navigation, vehicles, military and many civilian fields, and has been widely valued at home and abroad. The development of fiber optic gyroscope has a history of more than 20 years. There are many related articles and treatises published, and there are many patents. get applied. From a technical point of view, the current fiber optic gyroscopes mainly include interference fiber optic gyroscopes that apply the Sagnac interference effect and resonant fiber optic gyros. The other is the resonant fiber optic gyroscope under study and the newly developed Brillouin scattering fiber optic gyroscope. Among them, the technical re...

Claims

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Application Information

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IPC IPC(8): G01C19/58
Inventor 刘永智曾雪飞代志勇汤卫国彭增寿吴金谦张利勋
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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