FREQUENCY LOCKING OF A 1324 NM DFB LASER TO AN OPTICALLY PUMPED RUBIDIUM VAPOR

In this paper, we present some experimental results and a simple theoretical model on a dither-free frequency-locking technique of a DFB laser operating at 1324 nm. We use a resonance observed through absorption in an Rb-87 vapor optically pumped by a modulated 795 nm laser diode tuned to the D1 line. This approach has the advantage to produce sub-Doppler resonances. Such a technique could be used to generate an unmodulated 1324 nm wavelength reference.