I am looking at doing some phase-shift lidar experimentation. To get good accuracy, all the papers suggest that I need to be modulating the laser diode sinusoidally at ~200MHZ. I am finding virtually no laser diodes that have this sort of speed listed as a modulation capability. Does anyone know what the main drawbacks of driving a standard (cheap/plentiful) laser diode at that sort of speed would be? I think from memory that a DVD-R laser is modulated in the realm of 10MHZ, so I was thinking of starting with a laser like that, provided I can find a new one not sourced from a DVD Drive.