Collimated atomic beam, saturated absorption and two-photon spectroscopy are three methods of Doppler-free laser spectroscopy. (i) In each...

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Physics

Collimated atomic beam, saturated absorption and two-photonspectroscopy are three methods of Doppler-free laserspectroscopy.

  1. (i) In each case summarize briefly the principle of how theDoppler width is reduced or eliminated ,

  2. (ii) Which method (methods) collects (collect) signal from allatoms illuminated by laser beams?

  3. (iii) In collimated beam spectroscopy the probe laser beam withthe wavelength of 0.5 μm intersects the atomic beam (velocity of300 m/s) at the angle of 70o (the angle between the wave vector andthe velocity direction). What is the value of the Doppler shift inMHz?

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