Measuring current output of a diode driver
I'm sorry but its not clear what you want. I'm assuming you want to measure the current coming out of the laser diode. 

If that's the case, Just connect a resistor across the diode and measure the voltage. With this you know know the current coming out of the laser diode. 

Your minimum resistance value should be high enough to withstand highest current of the diode (200mA).