Optical module is the core accessory of fiber optic communication,nowadays there are many varieties of optical module market,what factors do we need to consider when purchasing optical module?How can we purchase the right optical module?Factors to consider when selecting optical modules.

Optical module purchase considerations

1,package rate

Optical module packages are

SFP:for 155M,1.25G,2.5G,6G optical modules

SFP+:the mainstream package of 10G optical module

SFP28:the package form of 25G optical module

QSFP+:Package form of 40G optical module

QSFP28:Package form of 100G optical module

In the selection of optical modules,the relevant master equipment will clearly lock the optical module package and rate supported.

2、Transmission distance www.fs-transceivers.com

Optical module transmission distance is divided into short distance,medium distance,long distance three,usually short distance transmission refers to the transmission distance below 2km,medium distance for 10-20km.≥30km is long distance transmission such as the common 40km,80km,120km,etc..We can choose the appropriate transmission distance of the optical module according to the actual a use situation,in addition,it should be noted that we choose the optical module transmission distance should be slightly larger than the actual application of the transmission distance,so as to ensure the quality of transmission.

3、Transmission mode

Optical modules can be divided into single-fiber optical modules and dual-fiber optical modules according to the transmission mode.Single-fiber optical module has only one fiber interface,an optical fiber for both transmitting and receiving optical signals;dual-fiber optical module has two fiber interfaces,connecting two optical fibers,transmitting and receiving one fiber each.In the selection of optical modules,pay attention to if the opposite end of the optical module is a single-fiber or dual-fiber module,to choose the same to be able to connect.

4、Interface

Common optical modules have LC interface,SC interface and MPO interface,electrical port module using RJ45 interface,optical modules to achieve information exchange between the two optical modules must be connected,the choice of optical modules to pay attention to and connect the patch connector match in order to insert for transmission.

5、Wavelength

Common optical module wavelengths are 850nm,1310nm,1550nm,CWDM,DWDM and so on.It should be noted that in the dual-fiber transmission mode,the wavelength of the two interconnected optical modules must be the same.Single-fiber optical modules need to be used in pairs,such as one end of the wavelength is:TX1310/RX1550nm(TX is the transmitting wavelength,RX is the receiving wavelength),then the opposite end must choose the transmitting and receiving wavelength is TX1550/RX1310nm optical modules.

6、Operating temperature

Optical module's according to the temperature can be divided into.

Commercial grade temperature(0-70℃):used in data centers,enterprise rooms.Because data centers,computer rooms will be installed inside the air conditioning to maintain the room temperature

Extended temperature(-20-85℃):If used in outdoor nodes in tropical areas,modules with extended temperature can be considered.

Industrial grade temperature(-40-85℃):used in outdoor,remote mountainous areas,tunnels and other environments with large temperature changes,industrial grade optical modules will import temperature compensation software,which is used to ensure that the Optical Transceiver has a stable operating current supply,when the temperature changes,the temperature compensation software will take effect.

Optical module in the work of the temperature is more affected by the temperature,if the working temperature of the optical module is too high or too low,there will generally be optical power will drop,sensitivity becomes lower,the eye diagram becomes worse,serious will make communication data errors or even lead to the optical module scrap,so be sure to choose the right temperature level optical module according to the actual use of the environment.

6、Compatibility

Optical module equipment manufacturers will encrypt their own equipment to varying degrees,which is what we call compatibility.Their own brand of modules can only be used in their own equipment,other brands of optical modules can not be matched with their own equipment.Compatibility manufacturers need different compatibility adaptations on Optic Transceiver,whether the perfect solution to the adaptation problem is particularly important.

7、Price

Now more and more suppliers have limited choice of compatible optical modules,whose quality is completely comparable to the original optical module,but the price is very competitive,which can help save a lot of costs.

8、Quality and service

Optical module in the first 1-2 years of use if the problem,then it can be ruled that the quality of the optical module problems.So we must choose a trustworthy optical module manufacturer in the purchase of compatible optical modules.

The above is a more comprehensive optical module purchase considerations,basically do the above points,to buy a suitable cost-effective optical module is not under discussion.