Single mode to multimode media converter is used to conduct the transparent conversion between the media of single mode and multimode optical fiber. It is used in the applications where media conversion required between multimode segments separated by long distances. We supply different single mode to multimode media converters, which fulfill the conversion of single mode and multimode not only at 850nm/1310nm wavelength, but also at 850nm/1310nm/1550nm wavelengths. Our converters support transmission in single mode dual fiber, single mode single fiber, and multimode dual fiber.