Ebay Item

[rfourt]

Just saw this on ebay.

Might be of interest for some

http://cgi.ebay.com/HIGH-POWER-15W-G...1%7C240%3A1318

[allthatwhichis]

Another quality auction from our own renowned "heruursciences"...

[keeperx]

this is a better buy from the same user
http://cgi.ebay.com/Breathalyzer-TIN...|39:1|240:1318

[daedal]

this is a better buy from the same user
http://cgi.ebay.com/Breathalyzer-TINY-POLICE-APROVED-BAC-TESTER-Go-NO-GO-08_W0QQitemZ250359805218QQcmdZViewItemQQptZLH_Defa ultDomain_0?hash=item250359805218&_trksid=p3911.c0 .m14&_trkparms=72:570|66:2|65:12|39:1|240:1318

Check this out:
http://www.dealextreme.com/details.dx/sku.2254

Or maybe... any of these:
http://www.dealextreme.com/search.dx...h.Breathalyzer

If a better buy is what you're after

--DDL

[MechEng3]

Hey it only has a tiny burn. It must be good then?

[Zoof]

Another quality auction from our own renowned "heruursciences"...

he recommends pumping with 810nm ?????

[mixedgas]

he recommends pumping with 810nm ?????

from BrightCrystals.com

quote:

Laser Properties of Nd:YVO4

1. One of the most attractive characters of Nd:YVO4 is, compared with Nd:YAG, it has 5 times larger absorption coefficient in a broader absorption bandwidth around the 808 nm peak pump wavelength, which just matches the standard of high power laser diodes currently available. This means a smaller crystal that could be used for the laser, leading to a more compact laser system. For a given output power, this also means a lower power level at which the laser diode operates, thus extending the lifetime of the expensive laser diode. The broader absorption bandwidth of Nd:YVO4 which may reaches 2.4 to 6.3 times that of Nd:YAG, is also valuable. Besides more efficient pumping, it also means a broader range of selection of diode specifications. This will be helpful to laser system makers for wider tolerance and lower cost choice.

2. Nd:YVO4 crystal has larger stimulated emission cross-sections, both at 1064nm and 1342nm. When a-axis cut Nd:YVO4 crystal lasing at 1064m, it is about 4 times higher than that of Nd:YAG, while at 1340nm the stimulated cross-section is 18 times larger, which leads to a CW operation completely outperforming Nd:YAG at 1320nm. These make Nd:YVO4 laser be easy to maintain a strong single line emission at the two wavelengths.

3. Another important characters of Nd:YVO4 lasers is, because it is an uniaxial rather than a high symmetry of cubic as Nd:YAG, what it emits is only a linearly polarized, thus avoiding undesired birefringent effects on the frequency conversion. Although the lifetime of Nd:YVO4 is about 2.7 times shorter than that of Nd:YAG, its slope efficiency can be still quite high for a proper design of laser cavity, because of its high pump quantum efficiency.


End quote

Steve

[Zoof]

Nice, thanks.