Ebay greenies and IR

[clansley]

Wikipedia says 532nm DPSS is between 20%-35% efficient and that 200mW of IR would be needed to get 40mW of 532nm. BUT not all of that IR is going to leak out, if it did then no 532nm would be seen at all (I presume).

Based on the two 532nm's I have without filters, there doesn't seem to be any relationship between the 532nm output power and the IR output power (other than the IR is higher than the 532nm in my case); eg 6mW of 532nm + 10mW of IR, 13mW of 532nm + 34mW of IR.

 

[cncyana]

eg 6mW of 532nm + 10mW of IR, 13mW of 532nm + 34mW of IR.

Your measured values come out to 1.6 times more and 2.6 times more IR. Thank you for that info.

I also suspect the wikipedia efficiency numbers do not take into account shoddy manufacturing practices so are probably the highest efficiency numbers we would likely see at best.