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Any doubts what L.D. and P.D. means?

[ATTACH=full]198545[/ATTACH]

Which laser driver are you considering?

Datasheet parameters suggest that this laser diode (L.D.) can't be safely operated without using feedback of built in photo diode (P.D.) because maximal threshold current and output power at minimal threshold overlap, you can't guarantee to keep maximum optical output (avoid breaking the laser) by only limiting current.