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Y waveguide chip and device for high-precision modulation of fiber-optic gyroscope and manufacturing method

A technology of waveguide chips and fiber optic gyroscopes, applied in light guides, optical components, optics, etc., can solve problems such as the inability to achieve quantization error suppression, and achieve a universal effect

Active Publication Date: 2019-08-02
BEIHANG UNIV
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Problems solved by technology

However, this 1LSB voltage value is generally only on the order of microvolts or even smaller, which is easily overwhelmed by noise and interference in the circuit, and cannot achieve effective quantization error suppression.

Method used

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  • Y waveguide chip and device for high-precision modulation of fiber-optic gyroscope and manufacturing method
  • Y waveguide chip and device for high-precision modulation of fiber-optic gyroscope and manufacturing method
  • Y waveguide chip and device for high-precision modulation of fiber-optic gyroscope and manufacturing method

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Embodiment Construction

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only used as examples and are not intended to limit the present application.

[0047] The embodiment of the present invention provides a Y-waveguide chip for high-precision modulation of a fiber optic gyroscope, such as figure 1 As shown, it includes: a substrate 1, a Y-shaped branched waveguide 2 located on the substrate 1, and a Y-shaped branched waveguide 2 located on the Y-shaped branched waveguide 2 along the direction of the central axis of the Y-shaped branched waveguide 2 (such as figure 1 The first electrode 3 and the second electrode 4 arranged in the y-axis direction shown); wherein,

[0048] The length of the first electrode 3 along the central axis of the Y-shaped branch waveguide 2 is m times the length of the s...

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Abstract

The invention discloses a Y waveguide chip and a device for high-precision modulation of a fiber-optic gyroscope and a manufacturing method. Different modulation indexes are realized by designing a double-electrode structure, the length of the first electrode is m times of that of the second electrode, the phase change generated by the first electrode is m times of that of the second electrode. When the same phase modulation is realized by the double electrodes, the amplitude of the modulation voltage loaded on the second electrode is m times of that loaded on the first electrode, and therefore an effect of generating small phase modulation by larger modulation voltage can be realized, and a problem that a quantization voltage corresponding to 1 LSB is small due to increase of a digit of aDA converter is solved. By applying a modulation voltage signal to a first bonding pad in the first electrode and a fourth bonding pad in the second electrode, and grounding the second bonding pad inthe first electrode and the third bonding pad in the second electrode, a state of modulating the phase length can be realized. The scheme has universality, and the length proportional relation of thedouble electrodes can be adjusted according to the precision requirement of the fiber-optic gyroscope on a feedback phase

Description

technical field [0001] The invention relates to the technical field of integrated optical chips, in particular to a Y-waveguide chip, a device and a manufacturing method for high-precision modulation of an optical fiber gyroscope. Background technique [0002] Fiber optic gyroscope is an all-solid-state inertial instrument that is sensitive to the relative inertial space angular velocity of the carrier. Compared with the traditional electromechanical gyroscope, the fiber optic ring is used to replace the high-speed mechanical rotor, which can eliminate mechanical and motion wear, and has long life, good anti-interference performance, start-up With the characteristics of short time, large dynamic range, and high reliability, it is widely used in military and civilian fields such as sea, land, air, sky, and submarine. Moreover, inertial technology has military characteristics such as good concealment, strong anti-interference ability, and good information continuity, making in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/125G02B6/138G02B6/132G02F1/01G01C25/00
CPCG01C25/00G02B6/125G02B6/132G02B6/138G02F1/011G02F1/0121
Inventor 郑月刘嘉琪张春熹宋镜明孔令海
Owner BEIHANG UNIV
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