[Ian, Torrey]
We tested how much the lab goggles are blocking light at 775 and 1550 nm. We did this by setting the power meter on the table in an existing path, recording the value, and then putting the goggles just before the power meter and recording the values. We also cleaned the goggles before testing. We did this with 5 different goggles randomly chosen from the box of goggles. For the "dark count" of the, we turned off the light and blocked the beam up stream. I think there was a large amount of scatter because the dark count was always higher than the goggled blocked measurement. The values were as follows:
| Wavelength | Input Power | Output Power | OD |
| 775 nm | 1.75 mW | 6 nW | ~5.5 |
| 1550 nm | 14 mW | 3 nW | ~6.66 |
The goggles claim to be OD 7+ @ 696-1550nm.
If you saw a previous version of this where we were claiming different numbers, we didn't account for the ambient room light being at uW levels. Turning out the room lights accounts for this.