A fiber loop mirror, or fiber loop reflector, is a simple reflecting device for fiber optics, made by connecting two ports of a fiber coupler with a fiber loop; it can be considered as a Sagnac interferometer. In the linear regime with a 50:50 coupler, it acts as a perfect. Thorlabs' Fiber Optic Reflective-Coated Patch Cables are designed to reflect light input through the connector backward through the fiber. They can be used to create a fiber interferometer or to build a low-power fiber laser. These retroreflectors are ideal for determining back reflection. We offer both retroreflectors and partial retroreflectors for various wavelengths and up to 5W optical power handling. For more information, please see the Alignment Procedure tab. Thorlabs' compact, ultrastable FiberPort micropositioners provide an easy-to-use platform for. 1310nm 1550nm Singlemode/Multimode In-line Fiber Optic Reflector SM Fiber Plane Reflector 1310, 1550nm fiber reflectors are very practical in various all-fiber devices and are often installed at the end of optical fibers; such as fiber interferometers, adjustable retroreflectors and fiber. It provides an expert-curated supplier directory, buyer-focused technical background information, and structured selection criteria to support professional procurement decisions.