Almost all modern optical transceivers use two fibers to transmit data between switches, firewalls, servers, routers, etc. The first fiber is dedicated to receiving data from network equipment, and the second fiber is dedicated to the transmission of data to the network equipment.
A new optical transceiver technology is now available and allows us to transmit and receive data from / to the interconnected equipment through a single optical fiber. This technology first emerged about 5 years ago and has led to the development of bi-directional transceivers, or BIDI transceivers for short.
How do BIDI transceivers work?
The main difference between bi-directional transceivers and traditional two- fiber optic transceivers is that bi-directional transceivers are equipped with Wavelength Division Multiplexing (WDM) couplers, also known as diplexers, which combine and separate the data transmitted through a single fiber Depending on the wavelengths of light. For this reason, bi-directional transceivers are also known as WDM transceivers.
To work effectively, two-way transceivers must be deployed in pairs, with their diplexers set to match the expected wavelength of the transmitter and receiver.
For example: If bi-directional paired transceivers are used to connect an A (Upstream) device and a B (Downstream) device, with transmission wavelengths 1310nm and reception 1490nm and vice versa:
The BIDI A transceiver must have a wavelength of 1490nm of transmission and a wavelength of 1310nm of reception.
The BIDI transceiver B must have a wavelength of 1310nm of transmission and a wavelength of 1490nm of reception.
The obvious advantage of using bi-directional transceivers is to reduce fiber cabling infrastructure costs by reducing the number of ports on the patch panel, which reduces the amount of tray space dedicated to fiber management, we mainly have two results, double the capacity of our network or reduce by half the cost of implementing a new network.
Online stores usually provide a full range of optical transceiver for all kinds of networking needs.
Due to the development of microelectronic technology, the technology of active and passive optical devices, optical transceiver has become a major general optical module in recent years. Although the optical module of the package, the cost, the transmission distance is different, but its internal composition is essentially the same. The main function is that the transmitting terminal device converts the electrical signal into an optical signal.
Optical module structure
The optical module includes optoelectronic devices, functions of the circuit and an optical interface and so on, optoelectronic devices, including transmit and receive.
Optical classification module
Optical receiving module, an optical transmission module and an optical transceiver, etc., may be divided into an optical module. The main function of the optical transceiver is implemented photovoltaic/electro optical conversion, including optical power control, modulation and transmission, signal detection and regeneration limiting function amplification solution. SFP, SFP +, GBIC, XFP, 1 x 9, etc. They are common. Cozlink glc sx mmd is one of the most popular optical transceiver module used in networking industry.