Lecture 3 - Continuous-Wave QR Spectroscopy Reviving an...

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EE 597E Spring 2007 Lecture 3 Continuous Continuous - - Wave QR Spectroscopy Wave QR Spectroscopy Reviving an Ancient Technique Absorption Spectra Robinson Marginal Oscillator Lock-in Detection Research Questions
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EE 597E Spring 2007 Lecture 3 CW versus Pulsed Spectroscopy CW versus Pulsed Spectroscopy Smaller excitation level affords several advantages – Simpler instrumentation – Smaller capital expense – Easier to search over large frequency ranges Low signal-to-noise ratio per unit time limits utility
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EE 597E Spring 2007 Lecture 3 Capitalizing on CW Strengths Capitalizing on CW Strengths Simple and low cost instrument for – Discovering QR transitions – Process quality monitor Improving the SNR per unit time expands applications – Process control sensor – Contraband detection
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EE 597E Spring 2007 Lecture 3 CW Contraband Detection CW Contraband Detection Large RF pulse amplitudes pose safety limitations Alternative detection methods have other disadvantages
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EE 597E Spring 2007 Lecture 3 QR Transition Frequencies for QR Transition Frequencies for I I = 1 = 1 2 2 31 1 43 1 2 d eqQ υ η υη ± ⎛⎞ ⎜⎟ ⎝⎠ =
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EE 597E Spring 2007 Lecture 3 QR Lineshape QR Lineshape [] * 2 1 FWHM
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This note was uploaded on 07/23/2008 for the course EE 597e taught by Professor Schiano during the Spring '07 term at Pennsylvania State University, University Park.

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Lecture 3 - Continuous-Wave QR Spectroscopy Reviving an...

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