Multi-mode interference measuring device and method

A multi-mode interferometry apparatus and a method for performing multi-mode interferometry are described. The apparatus comprises: at least one single-mode transmission input connectable to a light source for receiving single-mode light; a multimode output for emitting multimode light and collecting reflected multimode light; at least one photonic lantern operably connected between the at least one single-mode transmission input and the multimode output and designed to convert single-mode light into multimode light and to convert reflected multimode light into single-mode light; at least one single-mode reference input for generating at least one interference pattern between the reflected single-mode light and at least one single-mode reference signal; and at least one single-mode output connectable to the photodetector to detect the at least one interference pattern. 描述了多模干涉测量装置以及用于执行多模干涉测量的方法。装置包括：至少一个单模传输输入，其可连接至光源以用于接收单模光；多模输出，其用于发射多模光和收集反射的多模光；至少一个光子灯笼，其可操作地连接在至少一个单模传输输入与多模输出之间，并且被设计用于将单模光转换成多模光以及将反射的多模