Letter meaning and parameter abbreviation of optical module Daquan

Package type

The package type of the optical module corresponds to the switch port type , Usually SFP The optical module is inserted into the switch SFP port ,SFP28 The optical module is inserted into the switch SFP28 port , So analogy

Package type	explain
SFP	10G The following package types of optical modules
SFP+/XFP	10G Package type of optical module
SFP28	25G/32G Package type of optical module
QSFP+	40G/56G Package type of optical module
QSFP28	100G Package type of optical module

name

name	explain	distance	other
LX	1.25G SFP Medium distance optical module	The transmission distance is 10KM	-
LR	10G SFP+ Medium distance optical module	The transmission distance is 10KM	If the rate is 40G、100G, The transmission distance is 10KM The optical module of , Referred to as LR4, refer to 410G LR/425G LR
EX	1.25G SFP Long distance optical module	The transmission distance is 40KM	-
ER	10G SFP+ Long distance optical module	The transmission distance is usually 40KM	If the rate is 40G、100G, The transmission distance is 40KM The optical module of , Referred to as ER4, refer to 410G ER/425G ER
ZX	1.25G SFP Ultra long distance optical module	The transmission distance is 80km above	-
ZR	10G SFP+ Ultra long distance optical module	The transmission distance is 80km above	-

BIDI Optical module refers to single fiber bidirectional optical module , The use of WDM technology , Transmit and receive central wavelengths in two different directions , Realize the bidirectional transmission of optical signals on an optical fiber . among TX It refers to the emission wavelength ,RX Refers to the receiving wavelength .

English letter parameters of optical module

1. The wavelength of the optical module is in nanometers , English abbreviation nm
2. The unit of transmitting and receiving optical power of optical module is dBm
3. The unit of extinction ratio is dB
4. MM Refers to multimode , The central wavelength of multimode optical module is mainly 850nm, Multimode optical modules need to be equipped with multimode optical fibers （MMF）OM1/OM2/OM3/OM4/OM5 Use it together .SM It refers to single mode , The central wavelength of a single-mode optical module is usually 1310nm、1330nm、1550nm, Single mode optical modules need to be equipped with single-mode optical fibers （SMF）OS2 Use it together
5. LC、SC、ST、MPO It refers to the interface type of the optical module , What interface type is the optical module , You need to buy the optical fiber jumper of the corresponding connector
6. DDM Refers to the digital diagnostic monitoring function ,DOM It refers to the digital optical monitoring function , Usually optical modules have DDM/DOM function , These two functions are similar , Have DDM/DOM function , The network management unit can monitor various parameters of the optical module in real time , Such as power supply voltage , temperature , Receive optical power and transmit optical power , Laser bias current
7. RoHS It is a mandatory environmental protection standard formulated by EU legislation , The content of lead should not exceed 0.1%
8. The operating temperature of the optical module can be divided into commercial grade 、 Industrial grade 、 Expansion level , The temperature range of commercial grade is 0℃-70℃, It is mainly used for indoor constant temperature scenes ; The temperature range of industrial grade is -40℃-85℃, The temperature range of the expansion stage is （-20℃-85℃）, It is mainly used in outdoor and other harsh environments （ Like a tunnel ）
9. CDR It refers to the clock data recovery function , It usually appears in optical modules with high-speed and long-distance transmission , Because when the optical signal is transmitted to a certain distance , Its waveform will be distorted to a certain extent , The signals received at the receiving end are pulse signals of different lengths , At this time, at the receiving end , We can't get the data we need . therefore , At this time, there is a need for signal regeneration , The regeneration function of the signal is re amplification 、 Reshaping and retiming , Retiming refers to CDR Clock data recovery
10. PN It refers to the manufacturer's model ,SN Is the serial number of the manufacturer