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Optical fiber current sensor based on ring cavity ring-down spectroscopy technology

A technology of ring-down spectroscopy and fiber optic current, applied in voltage/current isolation, measuring current/voltage, instruments, etc., can solve the problems that the accuracy and stability of current measurement cannot be determined or not considered, and achieve easy process manufacturing, overcoming The effect of excessive loss and small volume

Inactive Publication Date: 2015-09-30
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, the experimental system does not consider the influence of the temperature of the magnetic field generating device on the refractive index of the magnetic fluid, which will cause the accuracy and stability of the current measurement to be uncertain.

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  • Optical fiber current sensor based on ring cavity ring-down spectroscopy technology
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Embodiment Construction

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the specific structure, principle and structural optimization process of the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0026] The present invention proposes a fiber optic current sensor based on ring cavity ring-down spectroscopy technology and magnetic fluid. The sensor consists of a tunable laser 1, an electro-optical modulator 2, a waveform generator 3, a No. 1 optical isolator 4, and a No. 2 × 2 A coupler 5, a current sensing unit 6, a No. 2 optical isolator 7, a delay single-mode fiber 8, a No. 2 2×2 coupler 9, a high-speed photodetector 10 and a spectrometer 11. The No. 1 2×2 coupler 5, the current sensing unit 6, the No. 2 optical isolator 7, the delay single-mode fiber 8, and the No. 2 2×2 coupler 9 form a ring cavity; The spectrum light source enters the in...

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Abstract

The invention provides an optical fiber current sensor based on the ring cavity ring-down spectroscopy technology, and belongs to the field of optical fiber sensing and magnetic fluid materials. The sensor comprises a tunable laser, an electro-optical modulator, a waveform generator, an optical isolator No.1, a 2*2 coupler No.1, a current sensing unit, an optical isolator No.2, a time-delay single mode fiber, a 2*2 coupler No.2, a high-speed photoelectric detector and a spectrograph, wherein the 2*2 coupler No.1, the current sensing unit, the optical isolator No.2, the time-delay single mode fiber and the 2*2 coupler No.2 are combined to form a ring cavity. The sensor has the advantages of being practical, reliable, ingenious in design, high in measurement precision and convenient for tuning.

Description

technical field [0001] The invention relates to an optical fiber current sensor based on ring-cavity ring-down spectroscopy technology and magnetic fluid, and belongs to the field of optical fiber sensing and magnetic fluid materials. Background technique [0002] Optical fiber current sensor has many advantages such as good safety performance, anti-electromagnetic interference, non-contact measurement, real-time telemetry on site and wide dynamic measurement range. It attracts many scholars to study in current measurement and analysis, and will be widely used in the power detection industry. use. Compared with traditional current sensors, fiber optic current sensors are designed based on the principle of magneto-optic Faraday effect (document 1. Peng N, Yong Huang, et al, Fiber Optic Current Sensor Based on Special Spun Highly Birefringent Fiber[J] , IEEE Photonics Technology Letters, 25(17):1668-1671, 2013), Peng N et al proposed a current sensor based on a special high b...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R15/24
Inventor 罗洪夏霁王琦熊水东张振慧王建飞王付印曹春燕
Owner NAT UNIV OF DEFENSE TECH
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