Acoustooptic attenuation filters based on tapered optical fibers

摘要

This paper studies the acoustooptic interaction induced by annacoustic flexural wave among the optical propagation modes supported byntapered optical fibers. We have investigated the evolution of thenacoustooptic resonance condition as the fiber is progressively tapered,nshowing that the taper radius can be regarded as a new degree of freedomnin the design of acoustooptic filters. Finally, we demonstrate a novelnacoustooptic filter based on nonuniform tapers for dynamic gainnflattening of optical fiber amplifiers