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Proceedings Paper

RF spectrum analysis in spectral hole burning media
Author(s): Max Colice; Friso Schlottau; Kelvin Wagner; R. Krishna Mohan; William Randall Babbitt; Ivan Lorgere; Jean-Louis Le Gouet
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Paper 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.

Paper Details

Date Published: 22 October 2004
PDF: 8 pages
Proc. SPIE 5557, Optical Information Systems II, (22 October 2004); doi: 10.1117/12.560074
Show Author Affiliations
Max Colice, Univ. of Colorado/Boulder (United States)
Friso Schlottau, Univ. of Colorado/Boulder (United States)
Kelvin Wagner, Univ. of Colorado/Boulder (United States)
R. Krishna Mohan, Montana State Univ. (United States)
William Randall Babbitt, Montana State Univ. (United States)
Ivan Lorgere, Lab. Aime Cotton, CNRS (France)
Jean-Louis Le Gouet, Lab. Aime Cotton, CNRS (France)

Published in SPIE Proceedings Vol. 5557:
Optical Information Systems II
Bahram Javidi; Demetri Psaltis, Editor(s)

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