Single-mode fiber optic saturable absorber.

摘要

A fiber optic saturable absorber for processing optical signals is characterized by an optical fiber (20) from which a portion (40) of the cladding (36) is removed to form a facing surface (28). A light-absorbing substance (30) having non- linear light-absorbing characteristics is applied to the facing surface (28) such that a portion of the optical signal energy is transferred from the fiber (20) to the substance (30) where it is absorbed. The device selectively attenuates the optical signal and noise, and can be used to reduce pulse waveform distortion caused by pulse broadening and by amplification of system noise.