Question about running laser at 2.2A

Hi

I am in the process of building my first build and I have a question about running a 9mm laser at 2.2A. According to a experiment performed by lazereer on the first thread of the 9mm lasers , he found that the lasers begin to dim out in the 2.2-2.3A region.

I was intending on running my laser at 2.1 A to be safe. But i would like to know from other users that have built their laser, if the laser's lifetime is significantly reduced to the point where the laser lasts a month before it dies?

I also would like to turn on my laser over a period of 4 minutes and was wondering if it would be fine to run it at 2.2A?( of course with heat sinking both the driver and the laser itself).

I have seen them pushed harder than that. It all depends on how efficient your diode is. Lifetime would depend on how hard its driven and how much its used. 4 minutes is a long time for it to be runni g unless you have a really good heat sink. What host is it going in?

well it will be driven at 2.2A. not sure how often i will use it. haven't decided on the host but it will have a good heat sink.

I suppose i just wanted to know from other forums members if their diode has died at 2.2A over a short period of time.

Greetings,

I have several here running at 2.4a-2.5a and with a good efficient diode at that current will give from 3w to 3.5w with a G2 or T2 lens.
I have 1 I use everyday and push it pretty hard and so far is working great.

cheers
Moe

Zak said:

well it will be driven at 2.2A. not sure how often i will use it. haven't decided on the host but it will have a good heat sink.

I suppose i just wanted to know from other forums members if their diode has died at 2.2A over a short period of time.

Click to expand...

My 9mm Diode is currently sitting at 2.25A .....only maybe 5 minutes runtime on it so far though...

ok interesting. I came across this video in which lazereer did a murder test for the 9mm diodes:

9mm 445nm diode Murder Test (MAX Currant POP.!!!) - YouTube

it looks like the diode die at around 2.8-3A while being chilled as shown in the video. it also begins to dim at 2.43A.

I am waiting on a high powered build and was also told by an experienced builder that 2.2A was a safe level if you want to avoid having a diode /w a shortened lifespan.

That doesn't necessarily mean you can't go higher and have a long lifespan, I'm just restating what I was told.

I hope to find the time to learn how to build these things myself one day

Personally, unless you could bin your diode I would not push it past 1.8A if you were like wanting to keep it for a really long time with of course moderate duty cycles and a good lens to keep the back splash off of it.