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Fujitsu Laboratories of America Announces Development of a Low Noise Phase Sensitive Amplifier

Amplifier addresses the limited reach of beyond 100 Gb/s high speed optical transmission

Fujitsu Laboratories of America Inc.

Los Angeles, CA, March 23, 2017 : At the Optical Fiber Communication Conference & Exhibition 2017 (OFC), Fujitsu Laboratories of AmericaOpen a new window in collaboration with University of Southern CaliforniaOpen a new window today announced the successful development of a low noise Phase Sensitive Amplifier (PSA), which resolves optical reach limitation in future higher speed transmission.
Greater modulation formats require higher Optical Signal to Noise Ratio (OSNR). This in turn limits the optical reach performance of future high speed transmission. In current optical networks, the accumulated amplified spontaneous emission (ASE) noise from Erbium Doped Fiber Amplifiers (EDFA) degrades OSNR thereby limiting the transmission reach and making it difficult to upgrade the data rates beyond 100 Gb/s.
Phase Sensitive Amplifier is expected to be the future low noise amplifier because of its ideal zero noise figure (NF) characteristics. However, there are challenges such as the need to use transmission fiber as a part of the optical amplifier and very high speed phase control for stable operation to realize a practical PSA as an effective EDFA replacement.
The developed PSA, employing Fujitsu’s original Raman amplifier assisted scheme, achieved better ASE noise performance compared to EDFAs. Our PSA configuration with dispersion stable highly nonlinear fiber (HNLF), provided by Furukawa Electric Co., LTD., addresses these technical challenges and experimentally achieved 1.5dB better ASE noise performance (equivalent to 2.5dB NF) compared to EDFA (4dB NF), which enables 1.4 times longer optical reach.  This novel Raman amplifier assisted PSA technology has strong potential to replace EDFAs in future optical networks thereby significantly extending reach of higher order modulation formats based high speed optical transmission.
“Fujitsu is a leader in optical communication systems” said Masayuki Kato, CEO of Fujitsu Laboratories of America. “By replacing current optical amplifiers, this new technology will enable our customers to easily upgrade existing networks to ultra-high-speed optical transmission networks”.

About Fujitsu

Fujitsu is the leading Japanese information and communication technology (ICT) company offering a full range of technology products, solutions and services. Approximately 155,000 Fujitsu people support customers in more than 100 countries. We use our experience and the power of ICT to shape the future of society with our customers. Fujitsu Limited (TSE: 6702) reported consolidated revenues of 4.5 trillion yen (US$40 billion) for the fiscal year ended March 31, 2017. For more information, please see

About Fujitsu Laboratories of America, Inc.

Fujitsu Laboratories of America, Inc. is a wholly owned subsidiary of Fujitsu Laboratories Ltd. (Japan), focusing on research in novel computing, networking technologies, software development and solutions for several industry verticals. Conducting research in an open environment, it contributes to the global research community and the IT industry. It is headquartered in Sunnyvale, CA.
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James Montantes

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Company:Fujitsu Laboratories of America, Inc.

Fujitsu, the Fujitsu logo and “shaping tomorrow with you” are trademarks or registered trademarks of Fujitsu Limited in the United States and other countries. 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: March 23, 2017
City: Los Angeles, CA
Company: Fujitsu Laboratories of America, Inc.