High resolution wavelength demodulation system and demodulation method thereof

A wavelength demodulation and high-resolution technology, applied in the high-resolution wavelength demodulation system and its demodulation field, can solve problems such as the influence of splitting ratio and stability demodulation results, increase the complexity of multiplexing networking, etc. The effect of eliminating the factor of optical power, fast response speed and high wavelength resolution

Inactive Publication Date: 2008-07-30
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

The disadvantage is that the splitting ratio and stability of the 3×3 coupler itself will affect the demodulation results, and because the 3×3 coupler scheme requires 3 detectors to receive at the same time for each channel, it increases the multiplexing network of the system Complexity

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  • High resolution wavelength demodulation system and demodulation method thereof
  • High resolution wavelength demodulation system and demodulation method thereof
  • High resolution wavelength demodulation system and demodulation method thereof

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Embodiment Construction

[0038] These and / or other aspects and advantages of the present invention will become clearer and more comprehensible by describing in detail preferred embodiments according to the present invention with reference to the accompanying drawings.

[0039] see figure 1 Shown, a kind of high-resolution wavelength demodulation system of the present invention is characterized in that, comprises:

[0040] A wavelength modulation sensor 1;

[0041] A first 1×2 coupler 2, the input end of the first 1×2 coupler 2 is connected to the output end of the wavelength modulation sensor 1 as the input end of the unbalanced fiber optic interferometer;

[0042] A second 1×2 coupler 3, the input end of the second 1×2 coupler 3 is connected to the output end of the first 1×2 coupler 2, as the output end of the unbalanced fiber optic interferometer;

[0043] Wherein the splitting ratio of the first 1×2 coupler 2 and the second 1×2 coupler 3 is 50:50;

[0044] A phase modulator 6, the input end of ...

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Abstract

A wavelength demodulation system with high resolution comprises a wavelength modulation sensor; a first 1 is multiplied by 2 coupler with the input end connected with the output end of the wavelength modulation sensor; a second 1 is multiplied by 2 coupler with the input end connected with the output end of the first 1 is multiplied by 2 coupler; a phase modulator with the input end connected with the output end of the first 1 is multiplied by 2 coupler and the output end connected with the input end of the second 1 is multiplied by 2 coupler; a photoelectric detector; a signal processing module connected between the second 1 is multiplied by 2 coupler and the photoelectric detector in series and used for demodulating a detected signal from an interference signal; and a sinusoidal signal generator with the output end connected with the phase modulator and the input end connected with the signal processing module and used for providing sinusoidal modulation signal from the phase modulator and the signal processing module.

Description

technical field [0001] The invention relates to a high-resolution wavelength demodulation system and a demodulation method thereof, which are mainly used for the wavelength demodulation of a wavelength modulation sensor and belong to the technical field of optical fiber sensing. Background technique [0002] Optical fiber sensing technology is a new type of sensing technology that senses and transmits external signals with light as the carrier and optical fiber as the medium. According to the different characteristic parameters of light waves that transmit external information, fiber optic sensors can be divided into types such as wavelength modulation, amplitude modulation, phase modulation, and polarization state modulation. Compared with other optical fiber sensors, wavelength-modulated optical fiber sensors have the advantages of strong anti-interference ability, simple sensor probe structure, small size, and easy networking and multiplexing. Therefore, wavelength-modula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/26G02F1/01G01J3/433
Inventor 肖浩李芳刘育梁
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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