Sergei Zibrov, Leonid Sidorenkov, Peter Siushev, Vitaliy Vasil'ev, Vladimir Velichansky, Denis Brazhnikov, Alexey Taichenachev, Anatoliy Tumaikin, Valeriy Yudin
The resonance of saturated absorption in counterpropagating light fields is experimentally and theoretically studied. We
focus on a case of parallel and linearly polarized waves, driving an open dipole transition in rubidium vapor. A new
Doppler-free resonance within the saturated-absorption dip is revealed. The phenomenon can be gained only in
absorption of strong wave in presence of weak one. The effect can not be explained basing on the previously known
reasons. The results obtained can be found useful in metrology for the frequency and time standards.
The resonance of saturated absorption in counterpropagating light fields is experimentally and theoretically studied. We
focus on two cases: parallel and linearly polarized waves, driving an open dipole transition and the general case of
elliptically polarized waves, driving closed dipole transition. The former reveals a new Doppler-free resonance as a peak
within the saturated-absorption dip. The latter case reveals a new polarization effect, causing a shift and asymmetry of
the saturated-absorption resonance. The results obtained can be found useful in metrology.
The resonance of saturated absorption in counterpropagating light fields is experimentally and theoretically studied. We
focus on two cases: parallel and linearly polarized waves, driving an open dipole transition and the general case of
elliptically polarized waves, driving closed dipole transition. The former reveals a new Doppler-free resonance as a peak
within the saturated-absorption dip. The latter case reveals a new polarization effect, causing a shift and asymmetry of
the saturated-absorption resonance. The results obtained can be found useful in metrology.
Two different schemes of cascade excitation of the 7P3/2 level of Cs have been studied and compared. The dependence of efficiency of the two-state cascade excitation of 6D5/2 level of Cs on wavelengths and polarization of two pumping diode lasers will be presented. The dependencies of Cs efficiency of two-stage optical pumping with two diode lasers on their frequencies and polarizations will be presented. The results can be useful for development of a 455 nm Cs laser operating with and/or without inversion.
We present a theoretical and experimental investigation of some of the instabilities encountered when a laser diode is exposed to optical feedback. The main emphasis in the paper is on the low-frequency instability seen for strong feedback levels.
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