Sunday, March 5, 2023

QSFP-DD MSA to extend module bandwidth to 1.6 Tbps

The QSFP-DD Multi Source Agreement (MSA) plans to develop a new specification extending the bandwidth of the form factor to 1.6 Tbps. The new specification will leverage 200 Gbps serial PAM4 SerDes technology currently under development.

The new specification will maintain the form factor’s eight lanes to provide an aggregate bandwidth capacity of 1.6 Tbps. The 1.6 Tbps module port will maintain backward compatibility with the entire family of QSFP and QSFP-DD modules and cables. This will provide the high degree of flexibility that end users and system designers have come to expect from QSFP and QSFP-DD, easing end user’s migration to the industry’s speed transitions. The new specification will also maintain the QSFP-DD’s riding heatsink feature that enables system designers the ability to efficiently cool higher power modules that may be required in next generation equipment.

The new QSFP-DD1600 specification will target the current port density enjoyed by systems utilizing QSFP-DD today and meet the faceplate bandwidth that is expected from next generation ASICs in the future.

“QSFP-DD’s backwards compatibility has been critical to our operational approach to upgrading the network,” says Jamie Gaudette, Partner Network Engineering Manager, from Microsoft, “We encourage the MSA’s work on QSFP-DD1600.”

“The system design flexibility that QSFP-DD enables greatly reduces the challenges in building systems with high-power modules,” says Mark Nowell, MSA co-chair, “the riding heatsink, besides enabling backwards compatibility, is an asset to system designers.”

InnoLight demos pluggable 1.6T OSFP-XD DR8+ and low power 800G transceivers

At this week's OFC 2023 conference in San Diego, InnoLight Technology will demonstrate its 1.6T OSFP-XD DR8+ pluggable optical transceiver. The OSFP-XD DR8+ module combines state-of-the-art 200G per lane optical technologies and industry-leading digital signal processing techniques. The module delivers up to 1.6 Tbps of transmission speed over 2km distance at a low power consumption of less than 23W over 0-70C temperature range.

"InnoLight's 1.6T OSFP-XD optical transceiver proves that the pluggable optics continues to deliver Moore's law in doubling bandwidth capacity without changing existing data center infrastructure. Our 1.6T optics enables 51.2T switch throughput capacity in a 1U rack configuration. It leverages the proven 100G serdes ecosystem with InnoLight's advanced 200G optical platform to deliver a low risk, easy to implement, and cost-effective solution to drive bandwidth expansion." said Osa Mok, the CMO of InnoLight.

In addition, in order to meet customer demand for low power 800G optical transmission, InnoLight will also demonstrate its 2nd generation 800G modules based on 5nm DSP and advanced silicon photonics technologies. At OFC 2023, InnoLight will showcase low power 800G OSFP DR8+ and 2xFR4 optical transceivers at less than 14W over 0-70C.

InnoLight also announced general availability of its 400G ZR and 400G ZR+ QSFP-DD coherent transceiver at OFC 2023. InnoLight's 400G ZR and ZR+ transceivers are fully compliant with QSFP-DD MSA, CMIS and OIF OpenZR plus standards, and can support transmission up to 500km.  The 400G ZR (+) QSFP-DD coherent transceiver will also be demonstrated at the OIF 400ZR Interoperability Lab at OFC 2023.

HyperLight ships its 110 GHz fiber-pigtailed electro-optic modulator

HyperLight announced commercial availability of it’d 110 GHz electro-optic modulators based on thin-film lithium niobate (TFLN) technology. These modulators are packaged with standard fiber and microwave connectors operating at the 1310nm (C), 1550nm (L) and 1600nm (O) wavelength bands. They feature low voltage drive, stable biasing, low insertion loss, proven reliability, and operating bandwidths over 110 GHz.

"We have developed and validated this product by working closely with industry leaders who have shown great demand for high bandwidth electro-optics technology." says Mian Zhang, CEO of HyperLight. "We have received overwhelmingly positive feedback from multiple customers on the impressive performance of our devices while they were in Beta. We are currently shipping the first release of these devices to our customers for field deployment, and we are excited to see them performing in our customers' systems!"

HyperLight demos Hybrid Transmitter with DFB Laser on Thin-Film Lithium Niobate

Casela's high-efficiency, high-power uncooled 1.31 um CW-DFB lasers

Casela Technologies introduced its 1310nm band high-power, continuous-wave (CW) distributed feedback (DFB) lasers .

Caselas claims record high power conversion efficiency and optical powers for silicon photonics-based transceivers.

Casela’s new 1 and 2 mm long DFB lasers achieve 125mW to 200mW optical power when uncooled and 300 to 400mW, respectively, when cooled, enabling the use of single laser for DR4 and DR8 transceivers. High optical powers are achieved at industry-leading power conversion efficiencies of 30% when cooled and 20% when uncooled operating at the maximum rated power. Key features include large modes with near-circular profiles that improve coupling efficiency to fibers or silicon-based waveguides and reliable operation proven during accelerated life testing. The same high-efficiency, high-power laser design is also available at other WDM, LAN-WDM and CWDM4 wavelengths. 

“Casela was founded by industry veterans to focus on an innovative path to higher laser powers and efficiency demanded by new requirements in datacenters and system-on-chip (SOC) applications,” said Dr. Bo Lu, CEO of Casela Technologies. “With the demonstration and publication of our industry-leading laser results at OFC 2023, we are announcing our new laser platform and products for transceiver and co-packaged optics applications. We are also pleased that Casela’s high-output laser performance has been validated by multiple customers and will be available in high-volume production in 2H2023.”