I would suggest you start with a low value cap say 1nF, this will reduce the energy of the laser pulse, then increase the cap value until you reach the light pulse radiant power you require.
Use caps with a very low inductance.
The FD [fast diode] is essential for damping any reverse over voltage swing when the laser is pulsed.
I used the circuit to pulse LD130, 25Watt laser diodes, radiant energy was approx 5 to 10Watts...
REMEMBER. You MUST wear eye goggle protection for 905nM lasers at this radiant energy level and the instrument should have the correct Laser Warning labels attached.