Abstract
We present an investigation of two-color polarization spectroscopy (TCPS) based on cesium 6S1/2–6P3/2–7S1/2 (852nm+1470nm) ladder-type system in a room-temperature vapor cell. The 1470nm laser can be offset locked by TCPS combining with frequency modulation sideband. This locking scheme offers a method of modulation-free and conveniently tunable the lock point of laser frequency relative to an excited state transition, and may have many applications such as in two-color magneto-optical trap, diamond-level structure four-wave mixing experiments.
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