2011/10/22 Jon Elson <el...@pico-systems.com>:
> charles green wrote:
>> most diodes can actually hit 30%-50% electrical to optical efficiency.
>>
> 50%?  I think that is physically impossible, due to the nature of a
> population inversion.

Thanks, guys, for Your input!
I think that I found acceptable solution, this seller has reasonably
priced lasers and seems that they provide complete solution, which
just needs to be connected to 12 VDC power:
http://stores.ebay.com/electronictoysshop
Their webpage:
http://www.kalecnc.com/

With regards to laser efficiency, these are power consumption data for
their 0,7W laser:
Operating Current                              :  1100  mA
Operating Voltage                              :  10 - 12 Vdc
As You can see, it is below 10%.

Viesturs

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