532nm modulation 4.1v > 5v difference?

[borgqueenx]

Well i got a power reading from lasever about my 2x 532nm units.
Weird enough they measure voltage under modulation and then mw.
But the weird thing is that they measured in the graph till 4.1v.
I asked why but he said 4.1v has desame power as 5v. Can that be true?
If its really at 4.1v modulation at its highest power, then they are overspec by only about 50mw or so

[depo]

WOW you've really stepped it up from drilling case fan holes.

[borgqueenx]

someone ?

[gottaluvlasers]

*most* lasers (im not sure about lasever in particular) will reach their maximum output at about 4V-4.5V

Reason being, most DAC plug into USB busses and are powered only by the bus itself. Therefore the maximum voltage output from a DAC (that isnt externally powered) is going to be about 4-4.5V. almost any laser manufacturer has almost no power increases past the ~4V range. Or very little increase.

If your laser read 1W at 4.1V i am pretty confident in saying that at 5V it will read 1W also. Or maybe 1.05W.

-Marc

[polishedball]

*most* lasers (im not sure about lasever in particular) will reach their maximum output at about 4V-4.5V

Reason being, most DAC plug into USB busses and are powered only by the bus itself. Therefore the maximum voltage output from a DAC (that isnt externally powered) is going to be about 4-4.5V. almost any laser manufacturer has almost no power increases past the ~4V range. Or very little increase.

If your laser read 1W at 4.1V i am pretty confident in saying that at 5V it will read 1W also. Or maybe 1.05W.

-Marc

So are you saying a Flexmod or any other diode driver should be setup for max power with a modulation input of 4.1V? This doesn't make sense to me since on a scope my DACs and ADAT's all hit 5V peaks.

[borgqueenx]

Ah thanks...guess my last lasever unit was rare overspec'd and these not at all.

[Xytrell]

The FB3 outputs a full 5V when powered from USB.

[norty303]

It makes sense to have max power at something less than optimal voltage, as the first thing to suffer on a long cable run is voltage.
My safety boards won't disengage unless they are getting about 3.7v, and I had the problem of long cable runs, cheap Chinese cables with higher than expected resistance, and all of a sudden no show as none of the lasers would turn on! So I would expect the laser voltages would be suffering the same way.