The single-fiber collimator is formed by coupling and encapsulating a single-fiber pigtail and a lens. There are two commonly used packaging forms: glass tube and metal tube. The function of the fiber collimator is to transform the light output from the fiber into collimated light (parallel light), or to couple the external parallel light (approximately parallel) into the fiber for transmission. This product is widely used in optical devices or optical research and experimental fields. Our single fiber collimator has mature production technology, stable quality and complete specifications.