I'm thinking about this situation:
Two plane polarized beams of light of equal intensity with polarizations that are mutually orthogonal are produced from a gas discharge lamp emitting nearly monochromatically at mean wavenumber ν and with bandwidth ∆ν using a polarizing beamsplitter.
I would like to create: 1) A circularly polarised beam 2) An unpolarised beam
I'm wondering are those 2 orthogonally polarised beam from the gas discharge lamp completely uncorrelated? In other words, just by combining them will give me "2) An unpolarised beam"?
and.. I got no idea how to create a circularly polarised beam. Any suggestions?