I would like to collimate a light beam stemming from a single-mode LED source. As the source is pretty big (a few millimeters), collimation with a single lens gives a bad result, i.e. a quite nonparallel beam.
I was wondering if a fiber optic taper could be used to create a smaller secondary source, for instance with the following setup:
My questions are:
- Would that work ?
- If yes, what are the limitations ? For instance with taping ratio, or the transmission rate.
If you are aware of some other way to reduce the size of a single-mode light source, I'd be happy to hear your suggestions.