Optical Link
A High Bandwidth Low Noise Optical VLF Link This is an article that I wrote which first appeared on Renato Romero’s website vlf.it.
It describes the design, characteristics and use of a high bandwidth, low noise optical system for connecting a VLF receiver to a data sampling system. This easy to build, inexpensive system has a flat response to over 200KHz, and a noise curve well below the VLF band.