[Laser] Mod Power to several lasers?

[Richard Burrows]

Hi

I wonder if anyone has an idea how to run six 5mw lasers from a circuit =
similar to K3PGP's Tx modulator. I can get one diode running fine but =
then as you add more diodes the current is shared unequaly between the =
diodes  (they take what they need)and then they blow!!!!!
I could build a seperate K3PGP's Tx modulator for each diode and run =
them in parallel, but driven from common mod source, but that  seems =
over complicated.
Has anyone any ideas or circuits they could point me to please.

To explain my application -  6 IR  ex-CD lasers each behind its own =
1inch collimator lens all driven from same modulator, this  setup to be =
used for cloud bounce comms. I got 4 working  all aligned to one spot , =
but current  was up very high and weakest one blew taking rest with it. =
Back to the drawing board!


                            Richard  G8BYI

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