Thanks guys, I'm glad you like them
/Thomas
Can the two be cascaded?
405nm (500-750mW) , 445nm 500 to 2750mW) , 473nm DPSS, 532nm DPSS (80 to 3000mW) & 635nm (250mW) OEM Lasers
Visiblediodelasers.com
10% Off Website lasers for PL members - PM or E-mail me.
CW, TTL & Analog Modulation available
Custom / Turnkey OEM systems available
Laser Diode Power Supplies (CW & Modulated) to 4 Amps
Beam-shaping optics available (Prism Pairs)
NEW - Laser Diode / Heat sink Mounts
I am guessing he wondered if you could double the amperage to one diode, by cascading them. To push more current. Guessing he needs a driver capable of more current than these provide individually.
leading in trailing technology
Do you just run them in parellel to double current and tie the modulation inputs together? Cascading implies serial and that I am sure will not work.
My quad and dual drivers showed up today!!! YEA!!!!
I have some of the dual as well as the quads and while adjusting one for some Mitsu diodes and another for some 445 diodes I realized I didn't REALLY understand the gain vs bias. These diodes each have a threshold current and this is easy to measure, however in analog mode when software drives the color from 0% to 100% I would think you would want 10% laser output at 0.5V modulation input and 60% output at 3V and so on. However the laser first switched "on" at aprox. 0.3V and the output was not linear with modulation input. It wasn't very close. What is the optimal set up for bias vs. threshold and gain vs. modulation input?
Beam suppression is active when the mod input is below ~0.2V. (+-5%).
This threshold was chosen because most DACs won't go all the way down to 0V.
Above this threshold, the driver will "jump" to the bias current.
Bias sets the "zero" current to the point where the diode starts lasing.
Gain controls the amount of current per volt on the modulation input.
So, output = bias + Vmod x gain.
/Thomas