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Ahh yes refraction is a bear. That is why in all the waveguide demonstrations have the laser entering from the side. Solve for refraction by working with it and/or create more space for the laser to work is key. The diagram below is a waveguide example for Pyrex...

Hey everybody thanks for the feedback. I really appreciate everyone’s’ thoughts. Please keep it coming!!! Let me clarify what I am trying to do. I am taking advantage of the Total Internal Reflection a concept when a light source comes from a denser transparent medium to a less dense...

I have been working on a few other ways to combine multiple laser beams with the same wavelength. My goal is to make it simple so anybody with a few extra laser diodes laying around can make a more powerful laser. :eg: I had this idea a few years ago, but I did not do anything with it. The...