Multimode Fiber (MMF) has a core diameter, typically 50–100 micrometers, has ability to transfer multiple modes of light through the fiber core, uses lower-cost electronics (LED, VCSEL) operates at the 850 nm and 1300 nm wavelength and is used for short distance interconnections. Multimode Fiber (MMF) has a core diameter, typically 50–100 micrometers, has ability to transfer multiple modes of light through the fiber core, uses lower-cost electronics (LED, VCSEL) operates at the 850 nm and 1300 nm wavelength and is used for short distance interconnections. Multimode Fiber (MMF) has a core diameter, typically 50–100 micrometers, has ability to transfer multiple modes of light through the fiber core, uses lower-cost electronics (LED, VCSEL) operates at the 850 nm and 1300 nm wavelength and is used for short distance interconnections (up to 550m). High Power Multimode Fiber Optic Patchcords are designed to enable high power light transmission by replacing energy-absorbing materials near the fiber end face such as epoxies, connector materials, and coatings with an air-gap-ferrule. These Patchcords are 2 meters in length and feature a 0. 22. a: Fiber Type; a=OM3 for OM3 50/125 micron multimode fiber; a=OM1 for 62. e: indicating simplex or duplex patchcord; e=S for simplex cable; e=D for duplex. Single-mode Fiber (SMF): suitable for long-distance transmission, typical specifications for OS2, can support from 10km to more than 80km.