Near-resonant holography.
Experimental results of a new technique for measuring species concentration by using two-wavelength holography are described. The refractive-index difference between two pulsed dye-laser wavelengths tuned to the nearresonant region of atomic sodium is recorded on a hologram. For small wavelength differences, the nonresonance aberrations are subtracted out.
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LF
Rubin
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Swain