Modulated Laser Driver with f > 300MHz and I p-p = 80mA

[DROBNJAK]

I am trying to make a voltage driven, modulated current laser driver, with frequency of 300MHz or more, that can vary the laser diode supply current 100mA peak-to-peak.

So far I succeeded "reaching" f = 30MHz, but current modulation was only approx. 20mA. I was driving it from DDS AD9850 frequency generator (limited to 70MHz), that produces sinusoidal signal 1  Vp-p. I used BC548C transistor, with f_T= 300MHz and Ic<= 100mA.

My circuit was redesign of this one: http://www.electronics-tutorials.ws/transistor/tran_2.html

My biggest limitation is that I am a noob an I do not know if I had chosen the right method.

Can you please throw in some ideas of how to achieve this?

[Thor-Arne]

Can you please throw in some ideas of how to achieve this?

You mean you want to modulate the laser with a analog signal?

If that's the case, I suggest you rethink your project using digital signals.
A laser isn't meant to be modulated by analog signals, but it can easily be modulated with a digital signal (on/off).