Abstract: Herein is described a side firing optical device for minimal output reflections (scatter) in a one-piece lateral output assembly within which a transmitting optical fiber conduit is disposed providing redirected electromagnetic radiation with operator control of the output beam characteristics. The herein disclosed lateral redirecting device permits ergonomic free rotation of the lateral output beam with positive orientation, provides focus-control of the output beam spot size and/or focus, and provides resposable components, both intraoperatively and interoperatively.