寬光譜混沌光源在光接入網(wǎng)及光纖傳感中的應(yīng)用
[Abstract]:In this paper, a wide spectrum chaotic light source is constructed by using the ring cavity of semiconductor optical amplifier (SOA) fiber. The 3dB bandwidth of the output spectrum is up to 60 nm, from 1500nm to 1560 nm, covering C band. At the same time, the time domain waveform of the output light has obvious noise characteristics, and the autocorrelation is good. In this paper, the SOA ring cavity light source is applied to the breakpoint detection and optical fiber sensing of optical access network. The correlation optical time domain reflectometer based on SOA ring cavity light source can detect the breakpoint of optical fiber and can be extended to wavelength division multiplexing passive optical network (WDM-PON). In addition, using the characteristics of correlation function, the correlation operation can be used in optical fiber sensing as a new sensing demodulation method. The main contents of this paper are as follows: (1) the basic characteristics of SOA ring cavity chaotic light source and the principle of combining with correlation function ranging are discussed in this paper. This paper mainly introduces the correlation optical time domain reflectometer based on SOA ring cavity and its application in WDM-PON breakpoint detection. Under the experimental conditions of this paper, the spatial resolution of 3cm is realized by the correlation optical time domain reflectometer, and the spatial resolution is independent of the measuring range. (2) the feasibility and uniqueness of correlation operation as a new sensing demodulation method are analyzed. The correlation peak value is used to reflect the change of the parameters to be measured. In this paper, the application of correlation demodulation in quasi-distributed fiber grating sensing network is verified by an example of axial stress and ambient temperature sensing experiments. (3) based on the correlation calculation, a piecewise correlation method is proposed. To make up for the deficiency of static measurement. The piecewise correlation method is used to segment the time series of a sensing process, which can reflect the sensing process dynamically and continuously through the waveform of the correlation peak. The application of piecewise correlation method in sensing demodulation is verified by a vibration sensing experiment.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:TN915.6;TN253
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