NeoPhotonics 400G-capable CFP2-DCO coherent transceivers trialled

Created January 7, 2020
Technologies and Products

Hybrid photonic IC-based module and subsystem specialist NeoPhotonics Corp has shipped its new 400G-capable ClearLight™ CFP2-DCO transceiver for end-customer trials. The device is billed as the industry’s first transceiver module able to deliver as much as 32 Tbps of capacity per fibre – significantly higher than today’s 200G CFP2-DCO capacity, or the emerging 400G CFP2-DCO capacity. It achieves this capacity by using internal optics that can support 80 channels of 64 Gbaud data at 75 GHz wavelength channel spacing, combined with the latest generation of 7 nm node DSP technology for improved OSNR and power consumption. NeoPhotonics says this new product effectively increases the capacity of an optical fibre by as much as 50% over standard systems at comparable distances.

The ClearLight CFP2-DCO is the first in a series of coherent module solutions based on NeoPhotonics’ patented Photonic Integrated Circuit (PIC) platform. It is designed to enable cloud operators and carriers to create optical interconnects with significantly greater capacity and density with reduced complexity in the high-capacity DWDM optical networks used in hyper-scale cloud and telecom infrastructure applications.

The ClearLight CFP2-DCO module incorporates several industry leading coherent solutions in a pluggable module. Included is the new extended tuning range Ultra-Narrow Linewidth Tunable C++ LASER™ Micro-ITLA. It also features the company’s high bandwidth 64 Gbaud C++ ICRTM receiver and C++ CDMTM modulator. The module supports tuning across the full Super C-band.

The new module tunes to 75 GHz spaced wavelength channels when operating at 64 Gbaud and 16 QAM to support 400G transmission in 400ZR and 400ZR+ modes for cloud DCI and metro telecom applications. NeoPhotonics also provides arrayed waveguide gratings for multiplexing and de-multiplexing with 75 GHz channel spacings and filter responses optimised for 64 Gbaud coherent signals, including for Super C-band use.

For long haul and regional applications, the module utilises 64 Gbaud and QPSK modulation to deliver 200G per wavelength transmission. This is made possible by an OSNR of less than 14 dB and enhanced performance to enable substantially longer reaches than standard 32 Gbaud, 16 QAM systems.

If the application requires that a 50 GHz channel wavelength spacing be used, the CFP2-DCO module can tune over 120 channels and operate at 200G with an OSNR of less than 16 dB. The module is compliant with the OIF-CFP2-DCO-01.0-Implementation Agreement and has a superior Watt per Gigabit performance. The module will also be available in standard C-band tuning range for applications that do not require the significantly higher capacity per fibre that this module enables.

“This new module joins our ClearLight™ CFP-DCO transceiver line, which has been shipping since 2017, and is our first in a series of DCO modules for 400G transmission and providing the benefits of extended C++ tuning range,” said Tim Jenks, Chairman and CEO of NeoPhotonics (pictured). “This new series will utilise our leading 64 Gbaud Silicon Photonics or Indium Phosphide PICs, together with our new Tunable C++ LASER Micro-ITLA. This will increase the capacity and distance performance in a network well above that available in systems today.”

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This article was written
by John Williamson

John Williamson is a freelance telecommunications, IT and military communications journalist. He has also written for national and international media, and been a telecoms advisor to the World Bank.