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Multi-wavelength high-power modulation light source for optical fiber sensing network and use method thereof

An optical fiber sensing, multi-wavelength technology, applied in transmission systems, electromagnetic wave transmission systems, electrical components, etc., can solve the problems of non-universal light source, low light source power, low system capacity, etc., to achieve passive, spectral The effect of wide width and high output optical power

Active Publication Date: 2010-05-26
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, the light source used in the fiber grating sensor network is only a wide-spectrum light source composed of a single device. Not universal, difficult to use in other optical fiber sensing networks

Method used

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  • Multi-wavelength high-power modulation light source for optical fiber sensing network and use method thereof
  • Multi-wavelength high-power modulation light source for optical fiber sensing network and use method thereof

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Embodiment Construction

[0014] Aiming at the requirements of optical fiber sensing network for different modulation patterns, multi-wavelength and high power of light source, the present invention provides a method and device for realizing multi-wavelength high-power modulation light source for optical fiber sensing network. The present invention has good stability, Strong applicability, simple assembly and so on.

[0015] The invention uses a super-radiant diode, which has incomparable advantages over semiconductor lasers in the application of optical fiber sensor networks. The super-radiant diode works stably, and the output power changes little with temperature, which is especially suitable for the requirement of optical fiber sensing on the stability of the light source. Super-radiant diodes do not have cavity surface degradation like semiconductor lasers, and their working life can reach 109 hours. This is especially important for optical fiber sensing. The sensing field often requires long-term...

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Abstract

The invention provides a multi-wavelength high-power modulation light source for an optical fiber sensing network and a use method thereof. The light source comprises an intelligent signal generation module, a driving module, a superradiation diode, a multi-wavelength filter, a first Er-doped optical fiber amplifier, a wideband filter and a second Er-doped optical fiber amplifier which are connected in sequence. The use method comprises the steps of generating digital waveform, internally modulating the light source, segmenting wideband modulation light source and light spectrum and amplifying two-stage power. The invention is especially suitable for high-capacity optical fiber sensing network based on the wavelength division and time division multiplexing technology. Meanwhile, the invention has important significance on improving the cost performance of an optical fiber sensing network system and generalizing the optical fiber sensing network with lower realizing cost.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, and in particular proposes a novel light source aiming at the needs of optical fiber sensing networks with multiple wavelengths, high power and different modulation formats for different sensing applications. Background technique [0002] Optical fiber sensing is a brand-new sensing technology developed rapidly along with optical fiber communication in the 1970s. It uses light waves as the carrier and optical fiber as the medium to realize the perception and transmission of the measured signal. As an important branch of the modern sensing field, optical fiber sensing exhibits many excellent properties, such as thin diameter, light weight, flexibility, tensile strength; water resistance, corrosion resistance, high temperature resistance, radiation resistance, electromagnetic interference resistance, No interference; transmission frequency bandwidth, large information capacity, low t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H04B10/20H04B10/572
Inventor 孙琪真刘德明李晓磊孙志峰张旭
Owner HUAZHONG UNIV OF SCI & TECH
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