为了提高光学干涉仪的灵敏度，从光速调控技术出发，理论上得到应用慢光以及超光速介质的光学干涉仪的灵敏度与介质群折射率的关系。该关系表明利用超光速介质的光学干涉仪可以获得很高的光学灵敏度，在慢光情况下对应材料的吸收区域对于弱信号的探测不利，而超光速情况下对于弱信号的探测更有优势。

In order to enhance the sensitivity of an optical interferometer, we deduce the relation between the group refractive index and the optical sensitivity of the interferometer by using slow or fast light material. The relation demonstrates that high optical sensitivity of an interferometer can be got by using fast light material. Under the condition of slow light, absorption area of corresponding material does harm to to weak signal detection, but the condition of fast light benefits weak signal detection.