LASER SOURCE FOR COLD ATOMIC INERTIAL SENSOR

摘要

The invention relates to a laser source assembly (10) configured to illuminate a vacuum chamber (E) comprising atoms in the gaseous state (At) so as to implement an inertial sensor with cold atoms, said atoms having at least two fundamental levels separated from a fundamental frequency difference (δf0) between 1 and a few Gigahertz, said set comprising: a master laser (Lm) emitting a beam having a master frequency (fm), a first servo loop (BA1) configured to slave the master frequency of the master laser at a frequency corresponding to half a given frequency of an atomic transition between a fundamental level and an excited level of said atoms, -a slave laser (Le) having a frequency slave (fe), a second servo-control loop (BA2) configured to slave the slave frequency of the slave laser with respect to the master frequency (fm), -the frequency uence slave (fe) being shifted with respect to the master frequency (fm) successively in the time of a first (δf1), second (δf2), and third (δf3) predetermined offset value, said offset values being included in an interval equal to half of the fundamental frequency difference (δf0) plus or minus a few hundred MHz.