I have no idea on laser diodes, i wish to be convert that into the lasers 100m.

So then be very careful! Some of them are so strong, that eroneously putting your eyes into the beam can make you blind!!! Do never experiment with lasers emitting infra red light!!!

'Edmund Scientific' has some laser modules, which can be modulated. 'F53162' e.g. provides 0.95mW (Class II) at 670nm. Modulation bandwidth is up to 650kHz.

Be very careful when experimenting with lenses and such stuff. If you focuse the beam even low power lasers can be very dangerous!!!

Kai