Laser diode ML520G72 failed?

Hi

I try to drive a laser diode, ML520G72 (Mitsubishi) with an iC-HG integrated circuit
driver, setting the current at about 280mA. however i failed to see any light out of it.

when i soldered the laser diode i was grounded and connected the pins very fast. i
could not figure out what really went wrong.

has anybody any experience on that?

Thanks

Hope these help you............

read especially
Threshold Current and Threshold Current Density
Current Source Requirements for Laser Diodes

Laser Diode Technology