NeoPhotonics Corp. (NYSE: NPTN) says it has demonstrated a range of indium phosphide (InP) components that support 120-Gbaud operation. The company used its coherent receiver and coherent modulators, alongside its ultra-narrow-linewidth tunable lasers or distributed feedback lasers to demonstrate 120-Gbaud support of applications ranging from 800G LR to 400G long-haul transmission.
The company expects that DSP baud rates based on 120 Gbaud or more for such applications as 800LR (≤10 km), 800ZR for data center interconnect (≤100 km), 800ZR+ for metro-core (≤1000 km), and 400-Gbps ultra-long-haul transmission. NeoPhotonics says it has developed InP-based coherent driver modulator (CDM) and intradyne coherent receiver (ICR) technology with more than 60-GHz bandwidth for such requirements and demonstrated their performance as follows:
- Long haul: 400 Gbps over 1500-km standard single-mode fiber, using an EDFA-only transmission system with OSNR of 16.7 dB at OFEC threshold
- Regional/metro-core: 800 Gbps with probabilistic shaping over 1000 km of standard single-mode fiber, using an EDFA-only transmission system, with OSNR of 24.3 dB at OFEC threshold
- ZR DCI: 800ZR over a single-span EDFA-based 100-km standard single-mode fiber with an OSNR of 25 dB at OFEC threshold and a transmitter output power of -6 dBm
- Unamplified LR: 800LR over an unamplified 10-km link with a 9-dB link budget, and 800-Gbps “coherent lite” over an unamplified 1-km link with a budget of 5.2 dB, both using a low-latency FEC with a BER threshold at 4 x 10-3. The latter used self-homodyne coherent detection to simplify the DSP and remove wavelength locking between the transmitter and local oscillator.
“We are pleased to take this opportunity to highlight the progress we have made in pushing our high-performance indium phosphide integration technologies to even higher speeds and over longer distances to enable new potential applications in cloud and data center applications,” said Tim Jenks, chairman and CEO of NeoPhotonics (whose company is in the process of being acquired by Lumentum). “These 120-Gbaud components coupled with our ultra-narrow-linewidth external cavity “nano” tunable laser or our distributed feedback lasers, along with concurrent DSP advances, could enable pluggable modules to operate at 800G for applications within and between datacenters, as well as to extend the speed and reach of embedded telecom systems.”
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