▎ 摘　　要

NOVELTY - The device has a quartz cuvette (1) comprising an incident light emergent face, and another quartz cuvette (2) comprising a light incident face. The quartz cuvette is filled with a single-wall carbon nano-tube dispersion liquid, and the latter quartz cuvette is filled with a single layer graphene dispersion liquid. A light path of the quartz cuvettes is 2-5 mm, and the single layer of graphene dispersion liquid and the single-wall carbon nano-tube dispersion liquid are processed using an ultrasonic degradation process. USE - Composite optical limiting device. ADVANTAGE - The device has single-wall carbon nano-tube dispersion effect with high damage threshold limit to guarantee protection devices to play a limiting role in a wide dynamic range of energy. The sysrem uses graphene dispersion with a strong role in limiting the ability, and ensures the device by limiting the role of ultra-low levels. The device combines the single layer graphene amplitude limiting threshold and the single-wall carbon nano-tube with high damage threshold, with an amplitude limit threshold. The device has wide energy range and wide spectrum range. The device has simple structure and low cost. DETAILED DESCRIPTION - The single layer of graphene dispersion liquid is selected from toluene, chlorobenzene or alcohol, and the single-wall carbon nano-tube dispersion liquid is selected from N-methyl pyrrolidone, dimethyl formamide or N, N-dimethyl acetamide. DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a composite optical limiting device. Quartz cuvettes (1, 2)