What is a Fiber Optical Transceiver?
A fiber optical transceiver is a device that encodes and decodes data into light pulses for transfer via a fiber cable. It achieves this by simply having a transmitter on one end and a receiver on the other end, hence called a transceiver (a combination of transmitter and receiver). The reason for “optical” being in the name is because of the use of light signals created by an LED or laser diode to represent the data. There are many types of fiber optic transceivers so it is important that you make the right decision towards selecting a transceiver for your application.
1.25G SFP WDM Optical Transceiver
Speed and Distance
When using multimode fiber, it’s important to remember that as your speed increases, your allowable distances decrease. Since the need for faster speeds is a growing demand, it’s crucial that you choose a type of fiber cables that will support these faster speeds. You don’t want to run new fiber only to realize that after a short time, it doesn’t support the next generation of network speeds.
Single-mode vs Multi-mode
There are two basic types of fiber: multimode fiber and single-mode fiber. Multimode fiber will allow each signal to travel on more than one pathway at one time, which is best designed for short transmission distances, and is suited for use in LAN systems and video surveillance. Single-mode fiber is best designed for longer transmission distances, which is used in applications that need bandwidth that will travel over long distances.
Half-duplex vs Full-duplex
Some chips will only use full-duplex configuration. Selecting switches, HUBs, or transceivers with half-duplex mode may cause loss and conflict. Only choose full-duplex unless you think that your application can support half-duplex. Nowadays, Ethernet interfaces on the switch operate at 10, 100, or 1000 Mbps, or 10,000 Mbps and in either full- or half-duplex mode.
Light Sources
When selecting a light source, transmission distance is a key consideration.
LEDs are used mainly for short-to-moderate transmission distances. Their spectral output is very broad, but far less focused than a laser.
Laser diodes are more expensive than LEDs, but are required for long-distance transmissions. Typically, three types of laser are used: Fabry-Perot, DFB, or VCSEL
The relationship between power and wavelength for LEDs and lasers
the industrial optical transceiver is suitable for the temperature range of -40 ° C ~ 85 ° C.
Wavelength
The commonly used wavelength is the following wavelengths.
850nm (MM, multimode, low cost but short transmission distance, generally only transmit 500M);
1310nm (SM, single-mode, loss during transmission loss but small, generally used for transmission within 40KM);
1550nm (SM, single-mode, small loss during transmission but large dispersion, generally used for long-distance transmission over 40KM, the farthest non-relay direct transmission 160KM);
Temperature
The operating environment temperature of a transceiver should not be too high, if more than the operating temperature, it is likely to link failure. The temperature range of the normal commercial optical transceiver is 0 ° C ~ 70 ° C, while
Conclusion
The above tips must be taken into consideration when choosing a right optical transceiver module. In addition, you also need to consider the transceiver connector type and fiber type. We provide a variety of optical transceiver and fiber optic solutions to meet your different needs.
