I was wondering how fast the laser beam power is affected by varying the voltage to the power supply? If I'm running at 100%, then cut it to 50%, how soon will the beam reflect the change?
I was wondering how fast the laser beam power is affected by varying the voltage to the power supply? If I'm running at 100%, then cut it to 50%, how soon will the beam reflect the change?
A very good question. I know some laser manufacturers specifiy rise times (usually around 50 to 150usec for RF lasers) but I am not sure of the fall time. I suspect the laser gas will remain energized for some small amount of time after the stimulous (hv dc or rf energy) is removed. Maybe a few usec to 100usec? (total guess)
Hello !
I made some mesurements on my own CO2 laser that answer your question. I need to send you two .bmp diagrams ...
Are you able to give me an e-mail ?
Regards.
Philippe
Sure! it's [email protected]. Thanks again!
I sent you a message on your e-mail ... I hope the diagrams are not to big ...
Tell me if you received them ...
Thanks !
The diagrams are great! I have cable so I don't mind the size, but 2 and 3 megs would be a bit much to post on this site. I'm not sure how you'd size them down. But thanks again! :rainfro:
(Message copy)
See attach files
Hello !
I hope these diagrams may help you. My laser is a 10W max power, but I use it
at a lower power (6W RMS).
The laser is powered with a 14.4 kV (max) double-wave unfiltered generator
through a 680 kOhm ballast resistance.
I assume that :
- the triggering voltage is equal to the cutting voltage (to simplify)
- the laser efficiency is 10 % (I have no optical power mesurement device)
I believe you can extrapolate to a bigger laser.
On the diagrams, "eff" is RMS.
Best regards !
Philippe
In addition :
On the first diagram, the intensity seems to become negative. Of course not ! The automatic scale of the diagram software is the reason of that !