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Spectral hole burning for wideband, high-resolution radio-frequency spectrum analysis

机译:光谱孔燃烧,用于宽带,高分辨率无线电频谱分析

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We present experimental results for what is to our knowledge the first spectral-hole-burning based rf spectrum analyzer to cover 10 GHz of rf analysis bandwidth. The rf signal of interest is modulated onto an optical carrier, and the resultant optical sidebands are burned into the inhomogeneously broadened absorption band of a Tm~(3+):YAG crystal. At the same time a second, frequency-swept laser reads out the absorption profile, which is a double-sideband replica of the rf spectrum, and thus the rf spectrum can be deduced after spectral calibration of the nonlinear readout chirp. This initial demonstration shows spectral analysis covering 10 GHz of bandwidth with >5500 spectral channels and provides 43 dB of dynamic range.
机译:我们提供的实验结果是我们所知道的第一款基于光谱孔燃烧的射频频谱分析仪,该频谱分析仪能够覆盖10 GHz的射频分析带宽。感兴趣的rf信号被调制到光学载波上,并且将所得的光学边带刻录到Tm〜(3 +):YAG晶体的不均匀加宽的吸收带中。同时,第二台扫频激光器读取了吸收曲线,该吸收曲线是rf光谱的双边复制品,因此可以在对非线性读出线性调频脉冲进行光谱校准后推导出rf光谱。最初的演示显示了频谱分析,涵盖了10 GHz带宽和5500多个频谱通道,并提供了43 dB的动态范围。

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