Very fast (100+ MHz) laser diode switching

[aishak_97]

im looking for a way to modulate a pen laser pointer of 635nm <1mW to high frequencies such as 350 to 500 MHz is it possible to create a circuit as such? if so pls guide me and my purpose is to make a phase difference method distance measurement system for long distance (upto 50m)

 

[Kripton2035]

you dont need such frequencies to make a laser distance finder...

**broken link removed**

or

http://letsmakerobots.com/node/2651

or also

http://sites.google.com/site/todddanko/home/webcam_laser_ranger