Photoelectric conversion is the main function of the optical module
. The transmitting end converts the electrical signal into an optical signal, and the optical module signal is transmitted through the optical fiber. Then the receiving end converts the optical signal into an electrical signal. Someone will ask me, what is SFP (Small Pluggable)? I will tell him that it is an interface device that converts gigabit electrical signals into optical signals. Light Moore comprises several components combined, which are optoelectronic devices, functional circuits and optical interfaces. The optoelectronic device includes transmitting and receiving parts. SFP supports most communication standards such as Gigabit Ethernet, SONET and Fibre Channel. The standard is extended to SFP, which can support a transmission rate of 10.0 Gbit/s, including 8gb Fibre Channel and 10GbE. There are many different sending and receiving types of SFP transceivers.
To provide achievable "optical performance," users can select the appropriate transceiver for each link according to the available optical module fiber type (such as single-mode fiber or multi-mode fiber). The optical SFP modules in use today are generally divided into the following categories: 1550nm wavelength/40km distance XD, 1310nm wavelength/10km distance SMF (LX), 850nm wavelength/550m distance MMF (SX), 120 km distance EX or EZX, 80km Distance ZX and DWDM. The SFP transceiver also contains a copper cable interface. In addition to the host device used for optical fiber communication, the optical module can also communicate through the UTP network cable. There are also single fiber and wavelength division multiplexing (CWDM) "bidirectional" 1310/1490nm wavelength upstream/downstream SFP.
The transmitting part of the optical module processes the input electrical signal with a certain code rate through the internal drive chip, and then drives the semiconductor laser (LD) or light emitting diode (LED) to send out the modulated light signal with the corresponding code rate, and provides the internal optical power automatic control circuit to maintain the output The optical signal power is stable.
How does the optical module convert or transmit data? First, input the optical signal with a certain bit rate into the module and then pass it to the photodetection diode. Finally, the electrical signal of the corresponding code rate is output through the preamplifier, including an optical sensor module, an optical receiving module, an optical forwarding module, an optical forwarding module, etc.
The main function of the optical module is to realize photoelectric/electro-optical conversion, including modulation transmission, signal detection, optical power control, IV conversion, limiting amplification and judgment regeneration, as well as TX-disable, anti-counterfeiting information inquiry and other functions, such as SFP, SFF, SFP+
, GBIC, XFP, 1x9, etc. In addition to the photoelectric conversion function, the optical module also integrates multiple signal processing functions such as CDR, MUX/DEMUX, performance acquisition, function control, and monitoring. Common optical forwarding modules are XENPAK, 200/300pin, X2/XPAK, etc.
In the receiving part of the optical module, an optical signal with a certain code rate is input into the module and then converted into an electrical signal by a photodiode. After passing the preamplifier, the conversion device will output the electrical signal with the corresponding code rate. Photoelectric conversion is the main function of the optical module. The transmitting end converts the electrical signal into an optical signal, and the optical signal is transmitted through the optical fiber. Then the receiving end converts the optical signal into an electrical signal. Purpose: Simply put, there is an optical module where there is an optical fiber. Specific equipment: optical transceivers, fiber optic transceivers, switches, optical network cards, fiber-optic high-speed dome cameras, base stations, repeaters, etc. SFP is usually used for rates below 4G. XPK commonly used 10 Gigabit speed.