Unstable Brightness?

[Flugufrelsarinn]

I recently bought a "5mW" green laser that is pretty overspec. The only problem is, it takes a while to warm up (I thought it was broken at first). However, even when it is warmed up, it'll be very bright (30mW) for maybe half a second then drop down to probably 15mW. The violet laser i bought from the same place is more constant.

Is there a reason for this inconsistency in power? Is it something I can fix?

 

[lasersbee]

Green Lasers are notorious for unstable outputs...
The cheaper the Laser the cheaper and less quality
the crystals....
As the crystals warm up they change characteristics
and therefor output...

Jerry

 

[Coherent Light]

Sorry, as Jerry said there is probably nothing You can do except try a new battery.

 

[Toke]

There is likely a good reason why laser modules vary so much in price.
(Roithner Lasertechnik charge $118 for a 30mW green module.)