Introduction about Fiber Optic Transceivers

Fiber optic transceivers include both a transmitter and a receiver in the same component. These are arranged in parallel so that they can operate independently of each other. Both the receiver and the transmitter have their own circuitry so that they can handle transmissions in both directions.

Fiber optic transceivers can interface with two types of cables, single mode and multimode.  Single mode is an optical fiber that will allow only one mode to propagate. The fiber has a very small core diameter of approximately 8 µm. It permits signal transmission at extremely high bandwidth and allows very long transmission distances.  Multimode describes a fiber optic cable, which supports the propagation of multiple modes. Multimode fiber may have a typical core diameter of 50 to 100 µm with a refractive index that is graded or stepped.

125M 1310nm 2km SGMII SFP Transceiver

It allows the use of inexpensive LED light sources and connector alignment and coupling is less critical than single mode fiber. Distances of transmission and transmission bandwidth are less than with single mode fiber due to dispersion.  Some fiber optic transceivers can be used for both single mode and multimode cables.  Common connector types for fiber optic transceivers include Biconic, D4, ESCON, FC, FDDI, LC, Loopback, MTP, MT-RJ, MU, SC, SMA, and ST.  General performance specifications to consider include wavelength, operating voltage, data rate, and bandwidth.

Important receiver performance parameters to consider when searching for fiber optic transceivers include sensitivity, responsibility, and receiver rise time.  The sensitivity specifies the weakest optical signal that can be received.  The minimum signal that can be received depends on the noise floor of the transceiver front end.  The measure of responsibility is the ratio of radiant energy expressed in watts incident on the device, to the resulting photocurrent expressed in amperes.

For more info, please browse our website. For purchasing more fiber optic transceivers, please contact a Sopto representative by calling 86-755-36946668, or by sending an email to info@sopto.com.

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