Hello all,
greetings from China.
Recently I was asking one of my friend to do a tailor-made work for me. I wanted him to combine 2 green lasers (both polarized) into one beam so we could obtain almost double power(result will be 3 watts around). I want him to try combine the 2 flash light first then collimate later, so hopefully we don't need to bother with re-alignment in future by adjusting mechanics.
We both know how to combine 2 beams with different polarization.
But question keep bothering me is how much brightness boost can we expect by doing this?
Does the combining influence the coherency somehow? If what I heard was correct coherency do influence the brightness(human eye).
and, Is the beam polarization ratio related with perceptive brightness?
I had experience of combining 2x5watts 532nm into 10watts, I felt there was just little(15-20%) brightness boost....But at that moment both beams was quite tight so I don't know my eye was kind of saturated or what....
A single 10watts laser (not conbined) looks more brighter than a combined one, at least this is what I feel, or just my brain doesn't want to believe what I have seen?.
Please advise...
Sean