抄録
Asynchronous operation of the live electrooptic imaging technique has been newly proposed and successfully demonstrated, which drastically untightens the severe restrictions regarding synchronization and modulation bandwidth in its conventional master-mode operations. The new operation mode is enabled by generation of an optical LO signal as a frequency-shifted replica of an RF signal to be visualized. Real-time visualizations of free-running MHz-class wide-band FM signals as well as Bluetooth waves carrying multi-Mb/s data emitted from an onboard module have been successfully demonstrated. Limiting factors for the bandwidth thus expanded by a factor of more than 106 have been clarified and systematically evaluated.
