That device is horribly inefficient at 3.8 percent, if it really produced ten watts output it would require near 300 watts of power input.
Click thumbnail to see the specs for that NECSEL.
A lot of laser manufacturers put labels on their equipment like that, they too often have a one label fits many, such as put a max power 10 watt label on anything under 10 watts, a max power 20 watt label for more than 10, but under 20 watts etc. I see this quite frequently on ebay offerings and the sellers will parrot the sticker on their listing as a specification when far from accurate. Like the stickers which for example say something like 800-1000 nm, they will then often list the unit as a 800 to 1000 nm laser when it is really some specific wavelength within that range.
Take this listing for an example, the seller is clueless these are not 900-1000 nm lasers, but that is what the label on the side says when it is actually 976 nm, but is indeed a 20 watt module, that is the problem, some manufacturers list the real power rating on the device, others way off from reality.
P/N: 100406023. SEE PHOTOS. All images taken in house of the unit(s) being sold, except for multiple quantities where item received will be in similar or better condition. Our warranty excludes all consumable goods, eg.
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http://dilas.com/assets/media/products/DILAS_SE_Module-NLW_976nm-20W_HS1-PM3.pdf - Whether it is good or not is the question..... I don't like buying from surplus outfits who don't know this technology unless the price is so low I am willing to take a chance, and that's hobby dollars low, not compared to the original price low. This does allow a best offer, but I'm not interested in it, I already have some 30 watt 976 fiber coupled modules.
Here's another laser as an example, the sticker on the side says 6 watts maximum, it's rated for close to half that. I have one of these but didn't push the current high enough to see if it could really reach that for intermittent duty cycle, maybe this one can? Probably not a good idea to try but they do design them conservatively, within the normal operating cycle, but eye surgery lasers are only pulsed for short periods of times, which this unit (link below) was used in, so I just don't know if it can be pushed that high or not yet.
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