A type of small-sized interferometer is reported, which makes use of the coupling of optical fiber and gradient index lens (GRIN) to form parallel light beams.

• 摘要介绍一种超小型光纤导光干涉仪，它利用光纤和自聚焦透镜的耦合来形成平行光路，利用半反和全反光学膜片分光。