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引入复自相干度来度量同一脉冲产生的超连续谱的相干性,并对其进行了实验研究.采用Mach-Zehnder干涉仪,测量700 ps脉冲抽运光予晶体光纤产生的超连续谱的相干性.实验测得超连续谱不同波长成分的相干长度均大于40μm,在长波区可达225μm.超连续谱的整个光谱区域各谱成分的相干度有差异,但复自相干度的模平均值为0.461,相干性较好,可以满足如光测量、光学传感等很多应用.
The self-coherent degree is introduced to measure the coherence of the supercontinuum generated by the same pulse, and the experimental study is carried out.The Mach-Zehnder interferometer is used to measure the coherence of the supercontinuum generated by the 700 ps pulsed light to the crystal fiber The coherence lengths of different wavelength components in the supercontinuum spectrum are both larger than 40μm and up to 225μm in the long wavelength region.The coherence of each spectral component in the whole spectral region of the supercontinuum is different, 0.461, good coherence, to meet such as light measurement, optical sensing and many other applications.