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  3. Fujitsu Introduces World’s First Dual Carrier Integrated Coherent Receiver for 400G Optical Networks

Fujitsu Introduces World’s First Dual Carrier Integrated Coherent Receiver for 400G Optical Networks

February 01, 2016

- Dual Carrier ICR for compact, high performance, low power consumption 400G optical network equipment -

Kawasaki, Japan, February 1, 2016 - Fujitsu Optical Components Limited (FOC) announced today that on February, 2016 it will be releasing the world’s first Dual Carrier (*1) Integrated Coherent Receiver supporting 200G DP-QPSK (*2) and 400G DP-xQAM (*3) for beyond 100G optical networks. Twice the data detection capacity of conventional coherent receivers is achieved by integrating two compact sized integrated coherent receivers into one package. This is accomplished by using PLC (*4) along with micro-assembly technologies for high integration and high density mounting of 90° Hybrids (*5), Balanced Receivers (*6), Polarizing Beam Splitters and VOA's (*7). This product will help facilitate compact, high performance, low power consumption optical network equipment for 200G/400G optical networks.

Internet services such as cloud computing have led to a rapid increase in the volume of communications traffic. The arrival of the IoT (Internet of Things) age will further accelerate the volume of communications traffic in the future. This has led to the spread of 100G optical networks and increased demand for next-generation beyond 100G optical networks. The requirement for core networks and metro networks to handle larger capacity and longer distance on their links has resulted in the expansion of 100G optical networks using digital coherent transmission systems (*8). R&D activities related to the commercialization of next-generation beyond 100G optical networks has also gained significant momentum. For the receiver portion of these coherent optical transceivers, high performance compact coherent receivers supporting both 200G DP-QPSK and 400G DP-xQAM modulation format are required.

FOC has successfully commercialized a compact Dual Carrier Integrated Coherent Receiver supporting both the 200G DP-QPSK and 400G DP-xQAM transmission formats. It will be released in February, 2016. The Dual Carrier ICR provides twice the date detection capacity of conventional coherent receivers while maintaining a compact size. This is achieved through integrating dual carrier functionality into one package by using PLC and micro-assembly technologies for high integration and high density mounting for the 90° Hybrids, Balanced Receivers, Polarizing Beam Splitters, VOA and monitor functions. This product enables drastic size reduction for the receiving part of coherent transceivers. This product will help facilitate compact, high density, high performance, and low power consumption optical network equipment for use in ultra-high speed core and metro optical networks.

Key Features

  1. Double the data detection capacity of conventional receivers while maintaining a compact size 
    Doubled data detection capacity in a small size package is achieved by utilizing PLC technology to realize smaller 90° Hybrids and through the use of wideband photodiodes with high receiver sensitivity.
  2. 200G DP-QPSK and 400G DP-xQAM modulation format support
    Dual carrier functionality in one package was achieved by placing the balanced receivers in an array and using wideband TIA‘s with digital interfaces. This product supports both the 200G DP-QPSK and 400G DP-xQAM modulation formats used in next generation 400G optical networks.

FOC plans to display samples of this product at OFC 2016, which is scheduled to take place from March 22 to 24 in Anaheim, California, USA.

Additional Information

Glossary & Notes

(*1) The transmission method which bundles 2 carriers (wavelengths) modulated with different data.

(*2) Acronym for Dual-Polarization Quadrature Phase Shift Keying. A method of phase modulation for digital signals in which 2 bits of data are allocated to each of 4 modulated optical phases (0, 90, 180, 270°) for both P-polarized and S-polarized light.

(*3) Acronym for Dual Polarization-x Quadrature Amplitude Modulation. A method of phase modulation for digital signals where multiple bits of data are allocated to modulated optical amplitudes and modulated optical phases for both P-polarized and S-polarized light.

(*4) Acronym for Planar Lightwave Circuit. Optical circuit on a silicon chip or quartz substrate containing optical waveguides with accuracies on the order of an optical wavelength

(*5) Optical mixer component that is used for coherent signal demodulation purposes in heterodyne and intradyne detection systems. The hybrid mixes the incoming optical data signal with an optical reference source and guides the combined signal to the balanced receivers.

(*6) A receiver consisting of two photodiodes which receive differential optical output from 90° Hybrids. Improved receiver characteristics are achieved by using the difference between the two photodiode currents. 

(*7) Acronym for Variable Optical Attenuation function. Function to variably attenuate the optical signal strength. Adjusting the attenuation amount in accordance with the received optical signal strength allows for acceptance of a wide dynamic range of optical input power.

(*8) Converts the received optical signal to an electrical signal in the optical receiving section after combining the received optical signal with a local reference light. The waveform distortion that occurs in the optical transmission path is then compensated for by digital signal processing. This technique allows for significant reduction in system cost through the elimination of optical dispersion compensators and optical amplifiers for loss compensation.

Contacts

Fujitsu Optical Components Limited
Sales & Business Promotion Division
Sales Promotion Department
icon-mail E-mail: foc-contact-pr@dl.jp.fujitsu.com

About Fujitsu Optical Components

Fujitsu Optical Components is a global leading supplier of the most advanced, high performance optical component solutions for high-speed optical networking applications including backbone networks, metro networks and data center. Our product line-up includes 100G Coherent Transceivers, 100G CFP/CFP2/CFP4 Transceivers, 100G QSFP28 Transceivers, 100G/400G LN Modulators and 100G/400G Coherent Receivers. For additional information, visit http://www.fujitsu.com/jp/foc/en/.

All other company or product names mentioned herein are trademarks or registered trademarks of their respective owners. Information provided in this press release is accurate at time of publication and is subject to change without advance notice.

Date: 01 February, 2016