I want to use the +LD -LD pads of this very short pulse driver for another laser diode whose pinout does not match to this driver.

Below shows pads/pins of the laser diode where I want to access two of them(anode and cathode to drive another laser diode):

enter image description here

I thought about soldering an SMA cable's wires to the driver's +LD -LD pads and then couple it to the laser I need to use.

Would that cause any sort of problems or are there any adapters for such purpose?

  • \$\begingroup\$ The added stray inductance of any wires or connector is likely to be a problem. \$\endgroup\$
    – John D
    Commented Jun 20, 2023 at 20:53

1 Answer 1


From the datasheet:

The maximum internal stray impedance must not exceed ~ 10 nH to achieve best performance

That's less than 1 cm, so you'll need to keep your leads extremely short, at least if you expect sub-nanosecond pulses.

Your best bet is probably to make an adapter PCB that reorders the laser diode pins and then solder that into the existing footprint.


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