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Old 02-01-2009, 08:07 PM   #1
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Default 75W laser diode??

So I'm sure that this can't be what it sounds like, but I was flipping through a Jameco Electronics catalog and in the hobby section along with other laser parts is a 75W laser diode, 905nm??? And for $39.95, lol. Can anyone explain what this is? http://www.jameco.com/webapp/wcs/sto...gDrillDownView
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Old 02-01-2009, 08:17 PM   #2
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Default Re: 75W laser diode??

I think it is pulsed if it is able to emit at that power. I can't imagine 70W coming out of that tiny thing :
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Old 02-01-2009, 08:26 PM   #3
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Default Re: 75W laser diode??

Yeah it says it's pulsed, but still.... a 75W pulsed would still be a powerful diode to run at CW probably, right?
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Old 02-01-2009, 08:35 PM   #4
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Default Re: 75W laser diode??

Maybe it is the wrong data sheet : or possibly pulsed at very short times, allowing for lots of power but significant cooldown.
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Old 02-01-2009, 09:33 PM   #5
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Default Re: 75W laser diode??

One of the members here had a 3kW pulsed YAG laser... IIRC the CW equivalent was about 200-300mW.
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Old 02-01-2009, 10:23 PM   #6
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Default Re: 75W laser diode??

Would be hard to colmenate that thing, there are 3-4 emitters in that little thing. It takes 9-11 V and 1000 mA to run * : : Lol and if you can could get it running CW it MIGHT be able to put out 25-50 "safely". You have to take into the fact that we dont know what size it is, or at least i dont feel like looking. : :P
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Old 02-02-2009, 01:05 AM   #7
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Default Re: 75W laser diode??

It might have potential; it looks like it's pulsed, but pulsed in the kilohertz frequencies -basically CW to analog creatures like us.

It's used in Laser/Radar speed guns, rangefinders and point to point, open air communications.

Needs an advanced driver, see: http://www.opticsinfobase.org/Direct...TOKEN=49209552

Here's a quote that has some good information:
"Performance of the laser according to the invention can be further understood with reference to the following
example. The source of Laser emission used was the OSRAM SPL PL90_3 diode, having nanostack technology. The nanostack technology consists in the "vertical" or epitaxial integration of a number of discrete emitters on a semiconductor chip, and this produces a two to three times increase in maximum power. The specific diode exhibits an aperture of 200x10 microns, from three overlapping emitters that reach an optical output of approximately 75 W when limited to 100 ns pulse lengths. The diodes were pulsed by means of a DEI PCX 7410 diode laser driver, from Directed Energy Inc. capable of covering the regime 20 ns to 1 Ps at 10A, and 5A in CW mode. To access the regime above 10A, a DEIPCO 7120 hybrid OEM driver was employed. The pulse voltage and current was monitored by a Tektronix TDS2014 to reconstruct the electrical power onto the diode, and extrapolate its optical output on the basis of the diode specifications.
[0191] Both the condenser and the objective can be chosen among aspheric lenses (as those used in optical disks systems) and glass multiplets optimized to operate in the near infrared region (700-1100 nm)."

"The basic characteristics of the SPL PL90_3 when driven with a commercially available
avalanche transistor circuit [21] are shown in fig. 1. The output pulse duration could be
adjusted from ~15 180ns and the repetition frequency was variable over ~1-10kHz. In these
experiments, the pulse duration and frequency of ~180ns and 1kHz respectively were used
throughout."
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Old 02-02-2009, 01:17 AM   #8
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Default Re: 75W laser diode??

Would the FlexMod work?
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Old 02-02-2009, 02:10 AM   #9
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Default Re: 75W laser diode??

I recall discussing this product a while back. It seems it's a 70W peak that, as suggested, only averages in the 1s or 10s of milliwatts.
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