Helping to run a green diode in the cold

Hello guys,

I have had a problem in the past with green laser diodes, they don't work in the cold. I've had a few cheap ones in the past, that once they are exposed to the cold, the beam output drops. I have a 50mW diode on the way. I don't know if the driver is made to be ACC or APC.

In the event that the diode dies in the cold, I had an idea to warm it up. I want to wire a 3 position switch into a custom host. First position is off, second is on, third is warming mode.

I want to take a resistor to limit the current to about half an amp. Then I want to run either magnet wire or hookup wire looped around the diode. When it gets too cold, I switch to warming mode, the wires heat up from the current, and warm the diode.

I'd like some feedback on my idea.

It would appear that you are talking about a green DPSS module and NOT a green diode

As the module heats up and cools down, the expansion and contraction of the metal in the module effect the alignment of the crystals

The crystals were originally aligned to lase at room temperature somewhere in a factory, in China

In order to control this, you will have to control the temperature of the module to stay within a certain range with a something like a TEC and thermistor.

Just heating it will probably not produce the results you are looking for

If the module gets too warm, the crystals will be out of alignment as badly as when it is too cold

Peace,
dave