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Hybrid integrated photoelectric chip, optical modulator and optical fiber gyroscope

An optoelectronic chip, hybrid integration technology, applied in instruments, optics, nonlinear optics, etc., can solve the problems affecting the zero bias stability of the interferometric fiber optic gyroscope, and achieve a simple manufacturing process, high device reliability, and fewer fiber couplings. Effect

Pending Publication Date: 2021-05-28
天津领芯科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the parasitic phase difference is very sensitive to temperature changes, it will seriously affect the bias stability of the interferometric fiber optic gyroscope.

Method used

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  • Hybrid integrated photoelectric chip, optical modulator and optical fiber gyroscope
  • Hybrid integrated photoelectric chip, optical modulator and optical fiber gyroscope
  • Hybrid integrated photoelectric chip, optical modulator and optical fiber gyroscope

Examples

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Effect test

Embodiment 1

[0049] Such as image 3 Shown is a schematic structural diagram of an embodiment of the hybrid integrated optoelectronic chip of the present invention, which is a top view structure.

[0050] Specifically, the hybrid integrated optoelectronic chip provided in this embodiment includes: electro-optic crystal substrate 200, PLC optical waveguide substrate 300, first straight waveguide 201, second straight waveguide 202, third straight waveguide 203, fourth straight waveguide 204 . The first branch 211 of the modulation electrode, the second branch 212 of the modulation electrode, the first Y-branch waveguide 301 , the second Y-branch waveguide 302 , and the arc waveguide 311 .

[0051] Wherein, the electro-optic crystal substrate 200 is an optical crystal with linear electro-optic effect, such as lithium niobate (LiNbO3), lithium tantalate (LiTaO3), lead lanthanum zirconate titanate (PLZT) or potassium titanyl phosphate (KTP).

[0052] In a preferred embodiment, lithium niobate ...

Embodiment 2

[0086] Such as Figure 7 Shown is a second embodiment of the invention.

[0087] In this embodiment, the placement position of the modulation electrode and the structure of the second Y branch have been changed:

[0088] The first branch 211 of the second modulation electrode and the second branch 212 of the modulation electrode are respectively placed on both sides of the first straight waveguide 201 and the fourth straight waveguide 204 for transmission in the first straight waveguide 201 and the fourth straight waveguide 204 The phase of the light wave is modulated. No modulation electrodes are placed in the second straight waveguide 202 or the third straight waveguide 203, and are only used for the transmission of light waves. For example, the second straight waveguide 202 is connected with a laser light source for introducing incident light waves, and the third straight waveguide 203 is connected with a photodetector. The connection is used to introduce light waves into...

Embodiment 3

[0094] Such as Figure 8 and Figure 9 Shown is the third embodiment of the present invention.

[0095] In this embodiment, the electro-optic crystal substrate 200 adopts a Z-cut lithium niobate crystal. In order to utilize the maximum electro-optic coefficient r33 of the Z-cut lithium niobate crystal, one branch of the modulation electrode needs to be placed directly above the optical waveguide, and the other branch is placed on one side of the modulation electrode branch. exist Figure 8 Among them, the first branch 211 of the modulation electrode is placed directly above the third straight waveguide 203 and the fourth straight waveguide 204, and a second branch 212 of the modulation electrode is placed between the third straight waveguide 203 and the fourth straight waveguide 204, or it can also be placed The two second branches 212 of the modulation electrodes, of course, the second branches 212 of the modulation electrodes can also be placed on the other side of the th...

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Abstract

The invention discloses a hybrid integrated photoelectric chip, an optical modulator and an optical fiber gyroscope. The hybrid integrated photoelectric chip comprises an electro-optical crystal substrate with a linear electro-optical effect and a PLC optical waveguide substrate, wherein the optical waveguide end face of the electro-optical crystal substrate is connected with the optical waveguide end face of the PLC optical waveguide substrate; the electro-optical crystal substrate with the linear electro-optical effect is provided with a waveguide used for light wave transmission and phase modulation and a modulation electrode, and the position of the modulation electrode is matched with the position of the waveguide used for phase modulation; the PLC optical waveguide substrate is provided with a waveguide used for light wave beam splitting and beam combining functions. The hybrid integrated photoelectric chip and the optical modulator based on the hybrid integrated photoelectric chip provided by the invention can effectively reduce recoupling of asymmetric mode light waves generated at the first Y branch to the second Y branch and parasitic phase difference formed in a phase modulator in an electro-optical crystal, and are beneficial to improving the zero-bias stability of an interference type fiber-optic gyroscope.

Description

technical field [0001] The invention relates to the technical field of fiber optic gyroscopes, in particular to a hybrid integrated optoelectronic chip and an optical modulator. Background technique [0002] Inertial technology is the core technology for inertial navigation, guidance and control, positioning and orientation, and attitude stabilization of various moving objects. The gyroscope, as the core component of the inertial measurement system, is used to measure the angular displacement and angular velocity of the moving object. Performance plays a key role. The interferometric fiber optic gyro based on the Sagnac effect has the advantages of no moving parts, large dynamic range, high sensitivity, anti-electromagnetic interference, flexible structure, etc., as well as its strong compatibility with optical communication devices, so it can be mass-produced. Rapid development and wide engineering applications. [0003] figure 1 Shown is the basic structure of the optic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/03
CPCG02F1/0305G02F1/0311G02F1/0316G02F1/0327
Inventor 杨旭李萍刘丹刘昆雨
Owner 天津领芯科技发展有限公司
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