| 摘要 |
The invention, which may be used in particular as a frequency standard, seeks to avoid disturbance in the control action in respect of the cavity 10 by a powerful parasite signal due to the line of stimulated emission. Control of the cavity and control of the oscillator 1 on the line of stimulated emission control in a shared-time mode. A control circuit 40 acts on the carrier by way of a programmable synthesizer 43, the carrier than assuming the successive values omega +, omega H, omega -, omega H, omega +, etc. in stages. omega His centered on the line of stimulated emission; omega + and omega - which are symmetrically shifted interrogate the flanks of the emission line. By means of a signal INH, the control circuit 40 periodically suppresses the output of an active filter 42 and thus interrupts the detection action used for controlling the cavity, during the periods in which omega Q is equal to omega + or omega -. This detection action occurs only when omega Q= omega H, and after a damping dead time.
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