Y-waveguide integrated optics phase modulator modulation factor measurement device and method

An optical phase and waveguide integration technology, applied in measurement devices, measuring electrical variables, and testing optical performance, etc., can solve problems such as transformation ratio errors, affecting the measurement accuracy of transformers, and achieve strong immunity and simple operation.

Active Publication Date: 2014-11-05
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

When the ambient temperature changes, the modulation coefficient will change, and the transformation ratio of the transformer will also change accordingly, resulting in a transformation ratio error and affecting the measurement accuracy of the transformer

Method used

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  • Y-waveguide integrated optics phase modulator modulation factor measurement device and method
  • Y-waveguide integrated optics phase modulator modulation factor measurement device and method
  • Y-waveguide integrated optics phase modulator modulation factor measurement device and method

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Embodiment

[0072] The wide-spectrum light source is a light source module with its own drive circuit, which can be a superluminescent light-emitting diode or an erbium-doped fiber light source; the circulator is a single-mode fiber circulator or a polarization-maintaining fiber circulator; the Y waveguide under test integrates an optical phase The input pigtail of the modulator is automatically fused to the output pigtail of the single-mode fiber circulator, or 0° to the axis of the output pigtail of the polarization-maintaining fiber circulator. The output pigtail of the modulator is connected to the input of the polarization beam splitter The pigtail is spliced ​​at 0° on the axis; the polarization beam splitter is a polarization maintaining fiber polarization beam splitter, and its input and output pigtails are Panda-type polarization-maintaining fiber; the polarization-maintaining delay fiber is a Panda-type polarization-maintaining fiber, and its length is about 100m, which determine...

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Abstract

The invention provides a Y-waveguide integrated optics phase modulator modulation factor measurement device and method. The device comprises a wide-spectrum light source, a circulator, a Y-waveguide integrated optics phase modulator, a polarization beam splitter, polarization-maintaining delay optical fibers, a Faraday optical rotation reflector, a signal generator, a photoelectric detector and an oscilloscope. The Y-waveguide integrated optics phase modulator modulation factor measurement device and method are of great significance in grasping the optical fiber current transformer transformation ratio temperature error production mechanism and inhibition method and improving temperature environmental suitability and long-term running stability of an optical fiber current transformer.

Description

technical field [0001] The invention relates to a device and a method, in particular to a device and a method for measuring the modulation coefficient of a Y waveguide integrated optical phase modulator. Background technique [0002] The Y-waveguide integrated optical phase modulator uses lithium niobate (LiNbO 3 ) as the base material, the waveguide is formed by the proton exchange process, which integrates the three functions of polarization, light splitting and phase modulation, which reduces the number of devices and enhances the reliability of the device. It is a digital closed-loop optical fiber current transformer to achieve high The core device for precision and large dynamic range measurement. [0003] The digital closed-loop fiber optic current transformer based on the Faraday effect uses the Y waveguide integrated optical phase modulator to realize bias modulation and feedback control, combined with digital lock-in amplification technology, by detecting two beams...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02G01R35/02
Inventor 李传生张朝阳孙海江崔虎宝舒开旗李俊
Owner STATE GRID CORP OF CHINA
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