Coherent population trapping resonances with linearly polarized light for all-optical miniature atomic clocks

摘要

We present a joint theoretical and experimental characterization of thecoherent population trapping (CPT) resonance excited on the D1 line of 87Rbatoms by bichromatic linearly polarized laser light. We observe high-contrasttransmission resonances (up to 25%), which makes this excitation schemepromising for miniature all-optical atomic clock applications. We alsodemonstrate cancellation of the first-order light shift by proper choice of thefrequencies and relative intensities of the two laser field components. Ourtheoretical predictions are in good agreement with the experimental results.