 Technical Terms *1 Linear Amplifier: Amplifies input signal at fixed ratio *2 PAM4: Abbreviation for Pulse Amplitude Modulation used to increase transmission capacity by amplitude modulation using four voltage levels *3 Gain: Parameter indicating how many times input frequency sinusoidal amplitude multiplied at output; plotted as frequency on logarithmic x-axis and gain in dB relative units on y-axis *4 Jitter: Parameter indicating quality of digital signal as timing fluctuation; larger jitter causes errors in acquiring digital signal values *5 DSP: Abbreviation for Digital Signal Processor; specialized microprocessor for processing digital signals and generally used in real-time computing *6 Digital Coherent Data transmission method using light phase and polarization to transmit high-capacity signals over long distances due to low signal degradation *7 IM-DD: Abbreviation for Intensity Modulation-Direct Detection (IM-DD); data transmitting/receiving system using changes in light intensity |
Furthermore, the AH15199B can amplify 140 Gbaud PAM4 signals from various signal sources, such as DSP*5, and can directly drive modulators and other devices requiring high amplitude. Therefore, it is a suitable driver for evaluating optical modulators for 800GbE and 1.6TbE digital coherent*6 system, now the focus of attention as next-generation transmission systems, as well as for IM-DD*7 systems used widely in optical communications.
This wideband linear amplifier supports the growth and smooth operation of high-speed networks.
Development Background.
Mobile data traffic is increasing with the growth of AI, machine learning, and other services, but further increases in communication speeds for servers and network devices are a major challenge.
The next-generation Ethernet standard IEEE802.3 supporting high-speed networks will use digital coherent methods, such as 800GBASE-LR1 (for 10 km), 800GBASE-ER1-20 (for 20 km), and 800GBASE-ER1 (for 40 km), as well as the IM-DD method. The OIF (Optical Internetworking Forum) is studying specifications for optical transmission technologies, such as 800ZR, 1600ZR, as well as coherent technology to support increased optical network capacity and accelerate growth of “beyond 1 Terahertz” systems.
On the other hand, higher transmission speeds suffer larger signal attenuation, so a high-power linear driver is needed to amplify PAM signals faithfully and drive modulators directly.
The AH15199B high-power linear amplifier supports evaluation of 2.0 Vpp signals at 140 Gbaud PAM4 for high-speed, high-output data transmissions at a low maximum power consumption of 1.5 W. A 140 Gbaud data speed equals 140 billion signal changes per second.
The standard, small, dedicated power supply reduces the risk of damage from incorrect handling.
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