Kaiam launches CWDM4 100G QSFP28 transceiver

Optical subsystems developer Kaiam has announced availability of its 100Gb/s QSFP28 transceiver. The uncooled CWDM transceiver is aimed at optical modules based on the CWDM4 and CLR4 multi-source agreements (MSA) for low-cost data centre applications.

Both the transceiver and 4x25Gb/s transmitter and receiver optical sub-assemblies (TOSA/ROSAs) are now sampling to select customers with volume production expected later in the year.

“We are extremely pleased to see the power of an extensible platform proved out,” said Dr. Karen Liu, vice president of marketing at Kaiam. “The entire QSFP28, down to the construction of the TOSA and ROSA is very similar to our current 40G QSFP+ LR4 transceiver. This integration technology becomes even more useful as the number of lanes goes up, for example in 8x50G approaches, or even the 16x25G that we are demonstrating here.”

 “There is always a balance between optical and electronic complexity, and historically both advance to increase the overall bandwidth capacity. Our MEMS-based integration technology enables higher bandwidth links today using mature optical components simply by increasing the number of lanes,” said Dr. Bardia Pezeshki, CEO of Kaiam.

“This parallel integration technology has proven itself in our current 4x10Gb/s QSFPs that we deliver in high volume to data centre customers. But unlike other approaches that are limited to a small number of lanes, we can easily scale to much higher channel counts. This is vital for our customers that can’t wait for the higher performance electronics.”

Kaiam is also conducting a live demonstration at OFC 2015, booth #1751 in Los Angeles, California on 24 – 25 March. The demo will feature a breakout application where multiple 100G transceivers can be connected to-a single 400G module through optical fibre that is compatible with the PSM4 MSA. Customers can effectively get the performance of four standard 100G modules in a higher-density 400G unit that’s interoperable with MSA modules.


As data demand ramps ever higher, researchers are looking to innovative amplifier designs to help transport a broader light spectrum through optical fibres, finds Andy Extance


Duncan Ellis shares his views about the increased focus on automation from network operators, and how the physical layer has so far stubbornly resisted the move


Switching off copper networks where fibre has been deployed is the end game, so why are so few operators doing it, wonders Pauline Rigby


With demand for fibre to the premises increasing, Keely Portway looks at the role training plays in ensuring installation skills remain available to meet this growing demand

Analysis and opinion