In basic research on optics, especially using lasers as light sources, it has been a long time since experimental systems using optical fibers have been adopted in many cases. Not only the research subjects for optical communication fields, but also for sensing, quantum computing, spectroscopy, measurement, and even high-end processing using lasers, it is very convenient to use optical fibers to handle them, and the transverse mode is also stable, therefor, good characteristics can be obtained. Optoquest manufactures high end optical fiber compact functional devices as research and experimental tools not only in the telecom field but also in various optical fields. Some of our recommended products are introduced in this paper.