Abstract
We show the possibility of a new kind of passive nonlinear-optical device: an optical power filter made of graded-index single-mode fiber (SMF) and a nonlinear medium (NLM). It is shown that, only for a particular power, the mode in the SMF matches the mode in the NLM. The transmission coefficient from the NLM to the SMF is determined, and it is shown that a laser beam with a particular power can be filtered out.
© 1996 Optical Society of America
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