The Department of Defense (DoD) is seeking proposals for a high energy, multi-component, optical isolator for 2 μm fiber lasers. This technology has potential applications in medicine, material processing, remote sensing, and other industrial fields. The objective is to develop an innovative fiber-coupled isolator that can handle high average and peak powers found in 2 μm pulsed fiber amplifiers. The isolator should have capabilities such as high optical isolation, low insertion loss, and maintain fundamental mode operation with near diffraction limited beam quality. The prototype package for the isolator should be no larger than 80 mm x 50 mm x 50 mm and support the inclusion of common fiber components. The project will have a Phase I to substantiate the technology, a Phase II to demonstrate the performance of a prototype, and a Phase III to make the design available to the DoD customer base and industrial partners. The solicitation is currently closed, and more information can be found on the DoD SBIR website.