If anyone has any future issues with the PGL-III-C style lasers here is what i found to be also a fail.
First and for most what i share is more for those that are experience in Fixing lasers themselves. Dont expect to take the laser apart and then be able to ship it back to a company to pick up the pieces. So make sure you know what your doing and your end goal is for you yourself to fix it.
Some Info:
If you got the 80mW Version then the diode they are using is 3W rated and is run at 2.2A for ~ 2.5W or so of 808nm.
The 50mW version use a 2W diode that they run from 1.7A-1.8A with a power of ~ 1.8W-1.9W of 808nm.
IN MOST Cases.
I have repaired several PGL-III-C before. From Alignment issue with someone dropping the laser and the OC mirror got jerked or a total crystal replacement to someone putting the cell in wrong killing the entire unit
to me just putting a battery in getting a quick flash of blue then nothing.
This appears to be exactly what happened in your case.
This happened to a CNI-PGL-III-C 50mW 473nm version. It had little use before i bought it used from someone.
When it happened I turned the laser ON only for the second time and it happened. Quick Flash of Blue then fadded out.
In My case it was the pump diode. But the LED on the driver still worked and there was a light glow coming from the diode which means it LED and or just had a short life.
I have already fixed the repair on my own by replacing the diode and re-adjusting the Pump focus lens.
In your case it sounds like something else Ive noticed that seems to fail with either putting the cell in wrong or sometimes with out any explanation. At least from my experience.
Here is a Picture of the back end of the PGL-III-C Module:
In the middle i think its a fuse or diode and it is connected to both LD- & LD+ "Even though in my pic its not its because i already cut it". When it fails it shorts both LD- and LD+ Which then does not allow any currant to pass through to the laser diode to pump anymore.
In 4 repair cases all i did was cut it off and the lasers worked again.
The LED goes out too if that fails.
There is a few diffrent version of drivers so some might not behave this way.
Maybe someone can help and say what that component is. I think its a fuse.
I suspect that this is what happened and that Fuse/diode did its job and prevented more damage to the unit.
If that is it, Why it happened.? I dont have the slightest idea.
Maybe if you retrace your steps back it might make more sense but somethings that come to mind not that iam saying this is what happened its just what comes to mind.
-The cell got put in wrong. To be honest i think thats why that is there for.
-Over Voltage (These driver are LM358 basses so no more then 5v input IIRC)
-Cap Popped on the driver.
Alot of times putting the cell in wrong goes un noticed. Several times Ive had to ask someone if they remembered if they put the cell in correctly and in most cases one cant remember.
It has happend to the best of us.
Most common is you put the cell in. "Wrong" The laser does not work you pull the cell out look around then put the cell in again "Correct way" and laser still does not work. One then thinks they never put the cell in wrong.
Again not saying that happened but just trying to paint a picture.
Either way 5 months the laser should not fail with proper use.
So in your case it would be smart to send it back rather then try a repair.
But for those that have some Old PGL-III-C definitely take a look at what i said.
Just to put in a few more numbers just in case someone needs the info.
What i found in PGL-III-C 473nm,532nm,589nm & 594nm when it comes to diodes they use for pumping its pretty much all the same. (Other models are also very similar)
-500mA they are using a 500mW 808nm diode @ ~500mW
-900mA to 1.1A they are using a 1W 808nm diode @ ~1W
-1.3A they are using a 1.5W 808nm diode @ ~1.2W (I think its 1.5W if not then overdriving a 1W diode.)
-1.7A-1.8A they are using a 2W 808nm diode @ ~1.8W
-2.2A-2.3A they are using a 3W 808nm diode @ ~2.5W
Its very hard to tell with the power output. But for the rare colors <50mW you will expect 2W diode or less. More then 50mW "Rated" you can expect a 3W diode.
For 532nm 300mW-400mW is using a 2W diode. 400mW-600mW they are using a 3W diode.
Someone might find this useful.
The PGL-III-C is still one of my all time favorite designed hosts and laser bodies.