RF spectrum analysis in spectral hole burning media

Max Colice; Friso Schlottau; Kelvin Wagner; R. Krishna Mohan; William Randall Babbitt; Ivan Lorgere; Jean-Louis Le Gouet

doi:10.1117/12.560074

22 October 2004 RF spectrum analysis in spectral hole burning media

Max Colice, Friso Schlottau, Kelvin Wagner, R. Krishna Mohan, William Randall Babbitt, Ivan Lorgere, Jean-Louis Le Gouet

Author Affiliations +

Proceedings Volume 5557, Optical Information Systems II; (2004) https://doi.org/10.1117/12.560074
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

We propose a novel, wideband spectrum analyzer based on spectral hole burning (SHB) technology. SHB crystals contain rare earth ions doped into a host lattice, and are cooled to cryogenic temperatures to allow sub-MHz hole burning linewidths. The signal spectrum is recorded in an SHB crystal by illuminating the crystal with an optical beam modulated by the RF signal of interest. The signal's spectral components excite those rare earth ions whose resonance frequencies coincide with the spectral component frequencies, engraving the RF spectrum into the crystal's absorption profile. Probing this altered absorption profile with a low power, chirped laser while measuring the transmitted intensity results in a time-domain readout of the accumulated RF signal spectrum. The resolution of the spectrum analyzer is limited only by the homogeneous linewidth of the rare earth ions (< 1 MHz when the SHB crystal is cooled to cryogenic temperatures). The spectrum analyzer bandwidth is limited by the inhomogeneous linewidth and by the electro-optic modulator bandwidth, both of which can be > 20 GHz.

Citation Download Citation

Max Colice, Friso Schlottau, Kelvin Wagner, R. Krishna Mohan, William Randall Babbitt, Ivan Lorgere, and Jean-Louis Le Gouet "RF spectrum analysis in spectral hole burning media", Proc. SPIE 5557, Optical Information Systems II, (22 October 2004); https://doi.org/10.1117/12.560074

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