13 November 2017
Applied Optoelectronics announces 100Gbps per lambda PAM4 directly modulated lasers
Applied Optoelectronics Inc (AOI) of Sugar Land, near Houston, TX, USA – a manufacturer of optical components, modules and equipment for fiber access networks in the Internet data-center, cable broadband, fiber-to-the-home (FTTH) and telecom markets – has developed uncooled 100Gbps per lambda PAM4 directly modulated lasers (DMLs) for 400Gbps optical transceivers.
Transceivers based on DMLs are preferred in data-center applications due to their low power consumption and low cost compared with solutions based on silicon and other external modulators. The 1310nm 53Gbaud PAM4 100Gbps per wavelength lasers leverage AOI’s mature high-volume 25Gbps DML product platform, which was further optimized to achieve a high laser bandwidth of nearly 30GHz. At 100Gbps, the new lasers exhibit PAM4 eyes with a transmitter dispersion eye closure quaternary (TDECQ) value of 2.5dB, along with other performance metrics that make them suitable for use in 400G DR4, 400G FR4 and 100G DR1 transceivers that meet the IEEE 802.3 Ethernet transceiver standards.
“100Gbps directly modulated lasers are the key to next-generation 400G products for data-center applications,” says Dr Jun Zheng, vice president of R&D. “By building on our current PAM4 DML platform development, we are now able to achieve 100Gbps per lane,” he adds. “We believe that this solution is the best technical approach to extend the cost leadership AOI has engineered at 40G and 100G to 400G and beyond.”