100G QSFP28 ZR4 Optical transceiver


January 20, 2022
Fujitsu Optical Components

100G QSFP28 ZR4 Optical transceiver
~Realization of low-power 80-km optical networks~

Fujitsu Optical Components (FOC) announced today that it is launching a low-power 100G QSFP28 ZR4 optical transceiver that can achieve power savings in 80-km optical networks between data centers.
This new product enables direct connection between routers/switches without the use of optical amplifiers that are conventionally used in optical networks between data centers, thereby contributing to the reduction of overall network equipment costs and energy savings.
With these low-power components, FOC will promote the initiatives set forth in the Sustainable Development Goals "Industry, innovation and infrastructure", including Goal 9, towards the realization of SDGs.

【100G QSFP28 ZR4 Transceiver】


In recent years, communications traffic has been increasing due to the growth of video content services and remote work, leading to a higher demand for optical networks used for data centers interconnections. In the past, high-performance coherent technology and optical amplifiers, which are also used in metro networks for telecommunications carriers, have been used for 80-km connections but challenges with cost reduction and power saving have remained.
Our company has developed the 100G QSFP28 ZR4 transceiver which can now extend the ubiquitous 100G 40-km optical transceiver reach to 80 km using device technologies that FOC has cultivated over the years. This enables direct connection between routers/switches without the use of coherent technology and optical amplifiers, thereby reducing equipment costs and saving power throughout the network.

Key Features

・Supports high optical output power, accommodates OTU4 signal
To enable 80-km transmission, FOC not only improved optical reception performance but also increased the optical output power (Tx Power [OMA]) to + 2.5 dBm. In addition, while maintaining the same power consumption (5.5W), FOC added the high optical output power + 3.5 dBm specification to the product lineup, making it possible to support more optical networks.
FOC has also specified a 100G OTU4 signal (111.8 Gbps), which is faster than 100G Ethernet signals (103.1 Gbps transmission data rate), and added this dual-rate variant to the product lineup so as to enable the provisioning of services based on the OTN (Optical Transport Network) standard used in communications backbone networks.

  • QSFP28 ZR4 Transceiver Product Line-up

    ・Complies with standards for form factor, electrical interface, and support functions
    The 100G QSFP28 ZR4 transceiver has a common platform design with the 100G QSFP28 ER4 for 40 km transmission and conforms to the SFF-8661, 8679 (*1) and IEEE 100GBASE-ER4 standard (*2) for 40 km transmission and the ITU-T G. 959.1 OTU4 standard (4L1-9 C1F) (*3), making it easy to replace ER4 with ZR4.

    The Sustainable Development Goals (SDGs) adopted by the United Nations in 2015 represent a set of common goals to be achieved worldwide by 2030. Fujitsu’s purpose — “to make the world more sustainable by building trust in society through innovation”—is a promise to contribute to the vision of a better future empowered by the SDGs.


    (*1) SFF-8679, 8661 : https://www.snia.org/technology-communities/sff/specifications
    (*2) IEEE: Institute of Electrical and Electronics Engineers
    (*3) ITU-T: International Telecommunication Union Telecommunication Standardization Sector


    Company and product names used in this press release are protected as the trademarks and proprietary product names of their respective companies.


    Fujitsu Optical Components Limited.

    Marketing Department
    E-mail: foc-contact-pr@dl.jp.fujitsu.com