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100G goes to its complete wing to transportation into the traditional. There are 4 many usual sorts of 100G QSFP28 optical transceivers for information facility application currently, i.e. QSFP28 SR4, QSFP28 LR4, QSFP28 PSM4, as well as QSFP28 CWDM4. Contrasts in between the 3 last will certainly be reviewed in this flow to assist you choose your 100G application setting appropriately.

1. 100G QSFP28 CWDM4 VS QSFP28 LR4

● Functions

QSFP28 CWDM4 is certified with the qsfp28 specification typical particularly developed for the implementation of 100G information web links within 2km of the information facility. The user interface of the QSFP28 CWDM4 optical component adjusts to the duplex single-mode 2km 100G optical user interface requirements, as well as the transmission range can surely get to 2km. It's one of the most commonly made use of 100G QSFP28 collection optical component in information facilities.

Comparative, 100G QSFP28 LR4 has all the functions of QSFP28 CWDM as well as is more affordable as well as affordable in the application of 2km transmission.

● Running Concept

100G QSFP LR4 as well as CWDM4 are basically comparable in the means how they operate. Both of them manifold 4 identical 25G networks into a 100G fiber web link with optical gadgets MUX as well as DEMUX. QSFP LR4 sends 100G Ethernet signify over 4 facility wavelengths, i.e. 1295.56nm, 1300.05nm, 1304.58nm, as well as 1309.14nm. Both user interface versions are highlighted as complies with:

● Set you back Distinctions

Although both of them are the traditional 100G QSFP28 optical application for IDC, the set you back in between both components are various, which is shown in the adhering to facets:

◇ The optical MUX/DEMUX gadgets released by QSFP CWDM4 are less costly compared to that of the QSFP28 LR4.

◇ The laser in the LR4 component is more expensive as well as takes in more power.

◇ LR4 needs extra TEC (semiconductor thermoelectric cooler)

Based upon the over contrast, optical components certified with the QSFP28 LR4 typical are more expensive, while the 100G QSFP28 CWDM4 typical recommended by MSA has well complemented the void triggered by the high set you back of QSFP28 LR4 within 2km transmission.


● Functions for 100G PSM4 & CWDM4

Along with the QSFP28 CWDM4 transceiver, 100G QSFP28 PSM4 is just one of the option options in intermediate transmission range. However what are the advantages and disadvantages of PSM4 compared to CWDM4?

QSFP28 PSM4 optical transceiver is a four-channel 100G adjoin remedy over a identical SMF as well as it's mostly made use of for 500m web link application. 8-core SMF constructs 4 independent channels(4 for sending as well as 4 for receiving)for 100Gbps optical interconnects, as well as the transmission price of each network is 25 Gbps.

Each signify instructions utilizes 4 independent networks of the very same wavelength of 1310nm. Consequently, both transceivers typically interact through 8-fiber MTP/MPO single-mode optical fiber wire. The optimal transmission range of PSM4 is 500m.

● Running Concept for 100G PSM4

For 100G QSFP28 PSM4's useful concept, please describe the adhering to number to understand how it sends indicates.

● Set you back & Modern technology Distinctions

Quickly talking, the 100G QSFP28 CWDM4 optical component is made with an integrated wavelength department multiplexer, production it more expensive compared to QSFP28 PSM4 optical components. Nonetheless, CWDM4 transceivers need just 2 single-mode fibers for bidirectional transmission, which is much much less compared to the 8 single-mode fibers of PSM4. As well as QSFP28 CWDM4 sends 100G Ethernet signify 100g lr4 spec over 4 wavelengths of 1271nm, 1291nm, 1311nm, as well as 1331nm specifically.

As the web link range enhances, the 100gbase lr4 specifications complete set you back of the PSM4 remedy increases swiftly. Consequently, whether to choose a PSM4 or CWDM4 interconnection remedy must be selected your real require in the application. The adhering to graph programs several of the technical distinctions in between both components.


For optical component providers, broadband, reduced power usage, as well as affordable are the major requirements for future information facility optical component demands. There are various options qsfp 100g cwdm4 p in regards to transmission range, inflection setting, running temperature level, as well as develop element, which have to be chosen based upon variables such as application circumstances as well as set you back.

[ Modified: Thursday, 29 July 2021, 12:57 AM ]