▎ 摘　　要

NOVELTY - Broadband optical limiter with an optical limiting response, comprises: many graphene nano-sheets; and a base material in which the graphene nano-sheets are distributed, where a limiting strength of the optical limiting response decreases as a wavelength of an incident light increases. USE - The broadband optical limiter is useful in devices used for protecting human eyes and optical sensors. ADVANTAGE - The broadband optical limiter: utilizes the pi conjugation, thus improves the optical limiting responses, and graphene suspensions in organic solvents which can work under 10 Hz laser pulses without losing the excellent limiting performance; does not exhibit turnover behaviors; has tunable dynamic and spectral responses ranging from the ultraviolet to the infrared; and are economical, can be obtained at low-cost.