Why is my 445nm laser quickly shutting down on full power?

[borgqueenx]

I have set my 445nm to have a max intensity of 650mW, recently.
Although some days later, now...when i set the laser on full power the whole beam dies within 3 seconds.
If i set the intensity to like 0.8/1 It works again without dropping power.

Why is this happening. And what could be the reason?

[michelrietveld]

heat? Is it the 1w casio you are using with a flexmod?

[michelrietveld]

I use the easylase test program with my easylase dac, this gives valid values, if I use quickshow with a circle then this is way different because it is not a static beam so you better not use this way to measure the output, perhaps you can configure a static beam from quickshow and redo the measurement.
michel

[norty303]

What size PSU are you using? Voltage and current
Is the driver showing any lights when it cuts out?

[borgqueenx]

It is a crappy shit psu i salvaged from a universal wall charger. Putting out 11,59 volts and can give 2a max.
Its a 700mw diode. Its the one i got from you michel

And when it cuts out the flexmod doesnt give the error light.

[norty303]

And what mount/heatsink/cooling are you using?

700mW diode? So not a Casio harvest then?

[borgqueenx]

The diode is in a combine block...with a total room for 3 diodes.
With a lasorb behind it. No cooling besides the block.
I have no idea if its a casio harvest.

[michelrietveld]

yes it is a casio, if you got it from me, only needs 6V on the flexmod so now it is turning 6V into heat, could be heat problem if the flexmod has insufficient cooling.

[borgqueenx]

oh. someone told me from LPF that it needed more then 6v to be operating normally.

What about 5V? can it also run on 5?

[michelrietveld]

in my experience 5v is not enough I use a different driver for my blue at the moment so can't test it.
Using the flexmod I know it needs aprox 5.75 volt to operate so 6 v is I think better else you can run into problems.
Michel