I am building an enclosure for my laser that emits at 1550nm. I need to integrate a window for the laser light to pass through. Anybody have any recommendations on what kind of glass would work best so that the optical losses are kept at a minimum? Ideally, it would be commercially available...
Does a light wave in air (n1 = 1) that is reflected off a glass surface (n2=1.5) experience a 180deg phase change? Looking at the Fresnel equations (theta = 0deg) I learn that:
according to http://en.wikipedia.org/wiki/Fresnel_equations
rp = (n2-n1)/(n1+n2) = 0.2 and rs = (n1-n2)/(n1+n2)...