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Integrated optical path chip used for optical current sensor and optical current sensor thereof

A current sensor, integrated optical circuit technology, applied in the measurement of current/voltage, optics, optical components, etc., can solve problems such as difficulties

Inactive Publication Date: 2016-03-23
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to ensure the stability of the optical current sensor, it is very important to ensure the stability of each discrete device or the entire optical path in the sensor, so it is difficult to implement this scheme in the actual production process

Method used

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  • Integrated optical path chip used for optical current sensor and optical current sensor thereof
  • Integrated optical path chip used for optical current sensor and optical current sensor thereof
  • Integrated optical path chip used for optical current sensor and optical current sensor thereof

Examples

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Effect test

Embodiment 1

[0021] Example 1, such as Figure 5 As shown, an optical current sensor with an integrated optical circuit chip includes a light source, a photodetector (PD1 and PD2 in the figure), a signal processor, an integrated optical circuit chip, a 1 / 4 optical fiber wave plate, and a current sensing ring; The first port of the integrated optical circuit chip is connected to the signal processor through a photodetector (photodetector PD1 in the figure), and the third port of the integrated optical circuit chip is connected to the signal processor through another photodetector (photodetector PD1 in the figure). PD2) is connected to the signal processor, the second port of the integrated optical circuit chip is connected to the light source, the fourth port of the integrated optical circuit chip is vacant, and the fifth port of the integrated optical circuit chip is connected to the One end of the current sensing ring is provided, and the other end of the current sensing ring is provided ...

Embodiment 2

[0024] Embodiment 2, because in many applications, multiple optical current sensors or multiple redundant use are required at one current measurement point. In order to save space and improve efficiency, when cutting the chip, we can integrate multiple optical current sensor device units on the same chip according to requirements, which can also greatly reduce the volume of the current sensor array. As an example, such as Figure 6 As shown, it is a structure with 3 current sensors. in, Figure 6 The 3-way current sensor in the 3-way current sensor uses an integrated optical circuit chip such as Figure 4 As shown, the integrated optical circuit chip for the 3-way current sensor includes three integrated devices required by the integrated optical circuit chip in Embodiment 1, and its installation process is the same as that of the single integrated chip unit in Embodiment 1. For brevity, Figure 6 The optical circuit port of the integrated optical circuit chip for the 3-wa...

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Abstract

The invention discloses an integrated optical path chip used for an optical current sensor and the optical current sensor thereof. The integrated optical path chip comprises 3X3 optical fiber couplers and 2X2 optical fiber couplers. The 3X3 optical fiber couplers and the 2X2 optical fiber couplers are connected by two transmission arms, and a polarization converter is connected in series on one of the transmission arms. According to the integrated optical path chip, cost of the optical current sensor can be greatly reduced, temperature stability and mechanical vibration resistance can be enhanced, and more importantly the scale production capacity of the optical current sensor can be greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of optical current sensors, in particular to an integrated optical circuit chip for an optical current sensor and an optical current sensor with the integrated optical circuit chip. Background technique [0002] Optical current sensing is a key device in smart grids, especially UHV smart grids. After nearly 30 years of hard work, the technology of optical current sensors has become mature and has been widely used in high-voltage and ultra-high voltage transmission systems. However, the data acquisition system of this type of optical current sensor adopts a relatively high-cost optical phase closed-loop technology. In addition to using a broadband light source, it must also use an expensive optical phase modulator, an optical fiber delay line, and a high-speed optical signal receiving unit (usually called Pin-FIT), the specific structure is as figure 1 shown. Therefore, the cost of the current optical curr...

Claims

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Application Information

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IPC IPC(8): G01R19/00G02B6/12
CPCG01R19/00G02B6/12004
Inventor 杨芾藜黄勇李斌
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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