It's as stable as the driver the diode is supplied by. Normally it's "stable". What datasheet are you looking for?
There are multiple diodes if you meant "diode datasheet". Anyways datasheets for this diodes aren't OK for us, this diodes and their datasheets are meant for blu-ray disks writting, not for laser pointing. You should search on the forum for info on any specific diode.
PHR->120mW~
SF-AW->180mW
GGW->200mW
BDS03->300mW+
I suggest you to read the FAQS and guides on this forum before posting, also to use the serach button. I already answered 2 "very stupid" questions. I asume you really have no idea, so stop it and start using the already posted stuff or you'll get kicked soon. Not trying to be offensive, but you can't go to the maths class in the university asking what a number is
Yours,
Albert