Synchronism systems which are needed to guarantee the global operation of current radiotelescopes formed by arrayed antennas require the use of high-precision clock signals. These signals, up to now generated by local RF oscillators, are suffering a growth in the operating frequency due to the evolution of new ADCs.
According to this, the generation of high precision reference signals by local oscillators is getting more usual. LOs allow a pulse generation much thinner and more pure than conventional electric oscillators, reducing the jitter noise and increasing the precision in antennas synchronization and the digitalization of high frequency signals.
Some of the most remarkable characteristics in DAS’ optical oscillators are:
- Frequency generation up to 1.5GHz
- Pulses length lower than 1ps
- Jitter lower than 30 fs
- Ruggedized option