The Tektronix P6702 is a 500 MHz optical/electrical converter for 1000 to 1700 nm input wavelengths.
It attaches to a scope or 1103 power supply through a Tekprobe BNC connector.
Sister model P6701 offers 700 MHz bandwidth for 450 to 1050 nm input wavelengths. The P6751 Spatial Input Head can be used to sample non-fibre input signals, e.g. on an optical bench.