Fiber optic transmitters consist of an interface circuit, a source drive circuit, and an optical source. The interface circuit receives electrical signals. The source drive circuit converts them to optical signals and triggers the LED or laser diode th. Fiber optic transmitters consist of an interface circuit, a source drive circuit, and an optical source. The interface circuit receives electrical signals. The source drive circuit converts them to optical signals and triggers the LED or laser diode that then sends the light signals to the fiber optic cable, where they travel to their destination. The GlobalSpec SpecSearch database characterizes fiber optic transmitters by their light source, cable type, and connector type.Buyers should consider their application requirements when specifying the light source. 1. LEDsare used mainly for short-to-moderate transmission distances because they have relatively large emitting areas. They cost less than laser diodes, but have a limited bandwidth. 2. Laser diodescan couple many times more power to optical fiber than LEDs. The. Fiber optic transmitters are designed for use with single mode and/or multi-mode cable. 1. Single-mode fibers (SMF)have small cores and are used withlaser sources for high speed, long distance links. They transmit infrared (IR) laser light at wavelength from 1,300 to 1,550 nm. 2. Multimode fibershave larger cores and are used mainly with LED source. Common connector types include Biconic, D4, ESCON, FC, FDDI, LC, Loopback, MTP, MT-RJ, MU, SC, SMA, and ST.
