Abstract

We present experimental results for what is to our knowledge the first spectral-hole-burning based rf spectrum analyzer to cover $10\mathrm{GHz}$ 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 ${\mathrm{Tm}}^{3+}:\mathrm{YAG}$ 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 $10\mathrm{GHz}$ of bandwidth with $>5500$ spectral channels and provides $43\mathrm{dB}$ of dynamic range.

© 2005 Optical Society of America

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