Optical Transceiver
Optical Transceivers Introduction

100G ultra-long distance transmission optical module(QSFP28 ZR4)

  • January 23. 2024

As a core parameter of optical modules, the market demand for ultra-long distance transmission optical modules is also rising steadily, and ultra-long distance transmission solutions have become the development trend of the future communication industry. At the same time, with the rapid development of cloud computing, big data and Ethernet, operators will upgrade the data center to a higher data rate, which further increases the demand for 100G, 100G QSFP28 ZR4 optical module came into being. This article ETU-LINK will talk about the 100G QSFP28 ZR4 optical module.


100G ultra-long distance transmission optical modules include 100G QSFP28 ER4 and 100G QSFP28 ZR4 two optical modules, of which the farthest transmission distance of ER4 is 40KM, the farthest transmission distance of ZR4 is 80KM.


Product characteristics

100G QSFP28 ZR4 optical module small size, low power consumption, maximum power consumption of 6.5W, dual LC optical interface, using hot-swappable QSFP28 package, support 0-70commercial grade operating temperature, in line with the latest SFF-8665/8636 described in the QSFP28 industry standard and related MSA, And it can use the digital diagnostic function through the I2C interface, the maximum rate can be up to 103.125Gbps (4x25G NRZ), after cost optimization, support 100G Ethernet, can achieve up to 80KM transmission, when the system opens FEC, through a pair of single-mode fiber transmission distance up to 90KM.


The following table shows the types of ETU-LINK 100G QSFP28 optical modules:

Prodcut

ETU-LINK PN

Wavelengthnm

Distance

Connector

QSFP28 SR4

EQ28510X-3LCD01

850

100m

MPO

QSFP28 PSM4

EQ23110X-3LCD2

1310

2km/10km

MPO

QSFP28 CWDM4

EQ2xx10X-3LCD2

CWDM4

2km

LC

QSFP28 LR4

EQ2xx10X-3LCD10

LAN-WDM

10km/20km

LC

QSFP28 ER4

EQ2xx10X-3LCD30

LAN-WDM

30km

LC

QSFP28 ER4

EQ2xx10X-3LCD40

LAN-WDM

40km

LC

QSFP28 ZR4

EQ2xx10X-3LCD80

LAN-WDM

80km

LC


Transmission principle

At the transmitter end, 4-channel serial data (NRZ) is recovered by the CDR and passed to four laser drivers to control four lasers with central wavelengths of 1296nm, 1300nm, 1305nm and 1309nm. The optical signal is multiplexed to a single-mode fiber via a standard LC connector. At the receiving end, the optical signal of the four channels is amplified by SOA, and the optical signal is demultiplexed by an integrated photodemultiplexer. Each optical signal is recovered by a PIN detector and then passed to a CAU-4 compliant output driver via a transresistance amplifier and CDR.

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