Passive masers having alternately operated oscillator and cavity control loops
US4326174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1980 |
| Grant date | Apr 20, 1982 |
| Priority date | — |
| Expiry date | Feb 5, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S1/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
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..sub.+, .omega..sub.H, .omega..sub.-, .omega..sub.H, .omega..sub.+, etc. in stages. .omega..sub.H is centered on the line of stimulated emission; .omega..sub.+ and .omega..sub.- 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..sub.Q is equal to .omega..sub.+ or .omega..sub.-. This detection action occurs only when .omega..sub.Q =.omega..sub.H, and after a damping dead time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.