Electrooptical phase regulation coefficient measing method for electrooptical phase regulator

An electro-optical phase modulation and phase modulator technology, applied in optical radiation measurement, measurement devices, measurement optics, etc., can solve problems such as poor accuracy and inability to meet high-precision sensor measurement applications.

Inactive Publication Date: 2007-10-03
ZHEJIANG UNIV
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Problems solved by technology

[0009] In view of the current research on optical fiber sensing technology, the accuracy of the original electro-optic phase modulation coefficient test method of integrated electro-optic modulator phase modulator is poor, which cannot meet the application in high-precision sensing measurement. It is necessary to measure the electro-optic phase modulation coefficient more accurately. A new measurement method to meet the current situation of application in high-precision sensor measurement. The purpose of the present invention is to provide a method for measuring the electro-optic phase modulation coefficient of an integrated electro-optic phase modulator, so as to realize the precise and fast measurement of the electro-optic phase modulation coefficient

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  • Electrooptical phase regulation coefficient measing method for electrooptical phase regulator
  • Electrooptical phase regulation coefficient measing method for electrooptical phase regulator
  • Electrooptical phase regulation coefficient measing method for electrooptical phase regulator

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Embodiment Construction

[0047] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0048] Fig. 1 is a schematic block diagram of a typical test system: the tested integrated electro-optic phase modulator 16, light source 11, photodetector 12, beam splitter 13 and 14, and optical fiber ring 17 constitute an optical Segyuk fiber interferometer; the light source The light emitted by 11 is divided into two beams by the first beam splitter 13 of the system, one of which reaches the second beam splitter 14 through the optical fiber, is divided into two again, and injected into the two ends of the optical fiber ring 17, They propagate along the clockwise and counterclockwise directions of the fiber ring 17 respectively, and are modulated by the time-delay differential modulation of the integrated electro-optical phase modulator 16 , and the modulated waveform is generated by the modulation signal generator 18 . The light modulated by the time dela...

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Abstract

The electro-optical phase modulation coefficient measuring method for integrated electro-optical phase modulator adopts one Sagnac fiber interferometer as the measuring device, and has the measured integrated electro-optical phase modulator phase modulating the signal to the fiber interferometer with one square wave signal in the period greater than 2 times transition time of the fiber interferometer. The electro-optical phase modulation coefficient is measured through adding modulated square waves to the fiber interferometer, sampling the square wave signal the fiber interferometer outputs with a sampling circuit and calculating.

Description

technical field [0001] The invention relates to a signal processing method in an optical fiber gyro sensor, in particular to a method for measuring electro-optic phase modulation coefficient of an integrated electro-optic phase modulator. Background technique [0002] The electro-optic phase modulation coefficient is a parameter used to measure the modulation performance of the integrated electro-optic phase modulator, which is defined as the ratio of the optical phase modulation generated by the phase modulator to the voltage applied to its electrodes. The voltage required to be loaded on the modulation electrode to make the integrated electro-optical phase modulator generate π phase is called the half-wave voltage, and the half-wave voltage and electro-optic phase modulation coefficient are equivalent parameters describing the phase modulation coefficient of the phase modulator. [0003] The working principle of the integrated electro-optic phase modulator is the first-ord...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J9/02
Inventor 刘承陈杏藩舒晓武
Owner ZHEJIANG UNIV
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