NeoPhotonics 400G coherent transceivers undergoing customer trials

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NeoPhotonics has shipped its new 400G capable ClearLight CFP2-DCO transceiver for end customer trials. 

The component and subsystem developer describes the transceiver module as ‘the industry’s first’ able to deliver as much as 32Tb of capacity per fibre by using internal optics that can support 80 channels of 64GBd data at 75GHz wavelength channel spacing, combined with the latest generation of 7nm node digital signal processing (DSP) technology. It is the first in a series of coherent module solutions based on the company’s photonic integrated circuit (PIC) platform.

The module incorporates a number of coherent solutions in a pluggable module, including the new extended tuning range ultra-narrow linewidth tunable C++ laser, Micro-ITLA.  It also features the company’s high-bandwidth 64GBd C++ ICRTM receiver and C++ CDMTM modulator.  This module supports tuning across the full ‘Super C-band’ and provides more spectrum and resulting capacity.

The ClearLight CFP2-DCO module tunes to 75GHz spaced wavelength channels when operating at 64GBd and 16 QAM to support 400G transmission in 400ZR and 400ZR+ modes for cloud data centre interconnect and metro network applications. Waveguide gratings are available for multiplexing and de-multiplexing with 75GHz channel spacings and filter responses optimised for 64GBd coherent signals, including for ‘Super C-band’ use.

For long haul and regional applications, the module uses 64GBd and QPSK modulation to deliver 200Gb per wavelength transmission. This is made possible by an optical signal to noise ratio (OSNR) of less than 14dB and enhanced performance to enable longer reaches than standard 32Gbaud, 16 QAM systems. 

Tim Jenks, chairman and CEO at NeoPhotonics commented: ‘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. This new series will utilise our leading 64GBd 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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