Applied Optoelectronics, Inc. based in Sugar Land, TX near Houston, reported that the company developed uncooled 100 Gigabits per second (Gbps) per lambda PAM4 directly modulated lasers (DMLs) for 400 Gbps optical transceivers.
The low cost and low power consumption of transceivers based on DMLs compared to silicon-based solutions and other external modulators makes them perfect for datacenter applications. The company’s new 1310nm 53 Gbaud PAM4 100 Gbps per wavelength lasers leverage its 25 Gbps DML product platform, which the firm further optimized to attain a higher laser bandwidth of almost 30 GHz.
Applied Optoelectronics Laser Performance Suitable for Ethernet Transceivers
At 100 Gbps, the newly developed lasers show PAM4 eyes with a transmitter dispersion eye closure quaternary (TDECQ) value of 2.5dB. This TDECQ value along with other performance metrics make them suitable for use in 400G FR4, 400G DR4, and 100G DR1 transceivers that match the IEEE 802.3 Ethernet transceiver standards.
“100 Gbps directly modulated lasers are the key to next generation 400G products for datacenter applications. By building on our current PAM4 DML platform development, we are now able to achieve 100 Gbps per lane. 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,” commented Dr. Jun Zheng, Applied Optoelectronics, Inc. vice president of R&D.