In the transmission of optical communications, we can often hear simplex, duplex and half-duplex, and single-core, dual-core; single-fiber and dual-fiber, so are there any links between the three, and what is the difference?
First of all, let's talk about single-core, dual-core; single-fiber and dual-fiber, on the optical module, both are the same, just called different, single-core optical module and single-fiber optical module are single-fiber bi-directional both BIDI optical module, dual-core optical module and dual-fiber optical module are dual-fiber bi-directional optical module.
What is simplex?
Simplex refers to the transmission of data in one direction only. In practical applications there are printers, radio stations, monitors, etc. Only signals or commands are accepted, no signals are sent.
What is half-duplex?
Half-duplex means that data transmission is supported in both directions, but not in both directions at the same time, and that only one end can transmit or receive at the same time.
What is duplex?
Duplexing is the simultaneous transmission of data in both directions and is a combination of two simplex communications, requiring both the transmitting and receiving devices to have independent receive and transmit capabilities.
In optical modules, half-duplex is a BIDI optical module that transmits over a channel that can both transmit and receive, but can only transmit data in one direction at a time, and can only receive data after it has been sent.
Duplex, on the other hand, is a normal two-fibre bi-directional optical module with two channels for transmission, which can both transmit and receive data at the same time.
