Finisar Begins Full Productin of 100Gbps SWDM Optical Transceiver

Finisar of Sunnyvale, California USA reported that it is in full production of its 100G shortwave wavelength division multiplexing (SWDM) optical transceiver. The company says that the new pluggable QSFP28 transceiver is the first mass-produced module that can transmit 100 Gbps over a single pair of multimode fibers.Finisar says that the device lets users upgrade from existing 10 Gbps data throughput to 100 Gbps without changing the existing fiber infrastructure.

The company also boasts that the transceiver is the first optical module on the market that is compliant with the 100G SWDM4 specification as defined by the SWDM multi-source agreement (MSA) (

Numerous data centers carry 10 Gbps optical signals over duplex multimode fiber (MMF). In such a configuration, one fiber is employed to transmit a signal and the other receives a signal. With such hardware, upgrading to 40 or 100 Gbps over MMF, data center operators have to quadruple the amount of fiber deployed (8-fibers).

However, the transceiver, system, and cabling suppliers that make up the SWDM MSA have agreed to follow specifications that do not require this additional fiber, and therefore allow data centers to extend their investment in their existing MMF plant.

Finisar Debuts both 40Gbps SWDM4 and 100Gbps SWDM4

Finisar asserts that it was the first vender of optical transceivers to complete reliability testing and introduce a 40 Gbps SWDM4 module earlier this year. Now, the company says it also the first vendor to complete reliability testing on and release a 100 Gbps SWDM4 module. The 40 and 100 Gbps modules comply with the “40G SWDM4” and “100G SWDM4” specifications of the SWDM MSA, respectively.

“The SWDM modules provide great value to our data center customers,” said James Wynia, director of network
product management at Dell EMC. “The ability to leverage existing 10G fiber infrastructure not only saves our customers
additional capital expenditure, but also provides operational savings by eliminating the need for new fiber installation and
associated facility upgrades.”