Realization of All-fiber Tunable Filter & High Optical Power Blocker Using Thinned Fiber Bragg Gratings Coated with Carbon Nanotubes

Using thinned fiber Bragg gratings coated with carbon nanotubes, we demonstrate that the reflection band can be controlled by the in-line optical power. We use the structure to realize an all-fiber tunable filter and a high optical power blocker.