Raman polarization-selective feedback schemes for all-optical microwave frequency standards

Abstract

All-optical locking of the frequency difference between two laser diodes onto a Raman transition is demonstrated. The properties of Raman-type polarization spectroscopy are discussed and exemplified in the cases of the 3.036 GHz Raman resonance of the 85Rb D2 line. The generation of a polarization-selective Raman resonant optical feedback ensures the Raman optical locking of the slave diode laser onto the master oscillator.

Observation of Faraday resonances on theS−Dtwo-photon transition ofRbatoms

“…Presently there are many theoretical and experimental investigations about resonance polarization phenomena in gases for one-photon transitions [1][2][3][4]. For example, magneto-optical polarization techniques were used for investigation of coherent effects in transmission [5,6], selective reflection experiments [4,7] and were applied for laser frequency stabilization [8][9][10]. The physical mechanisms, experimental methods and application of magnetooptical effects in atomic vapors have been recently presented in a review paper [1].…”