Yissum - Research Development Company of the Hebrew University

High-Speed OFDM-Based Passive Optical Access Network

Posted by Yissum - Research Development Company of the Hebrew UniversityResponsive · Innovative Products and Technologies · Israel

Summary of the technology

High-Speed OFDM-Based Passive Optical Access Network
Project ID : 14-2010-2430

Description of the technology

Moshe Nazarathy, Department of Electrical Engineering, Technion  

 

Background

There is an increasingly growing interest in cost-effective technology to improve spectral efficiency of optical networks while allowing flexible bandwidth allocation between users. Wavelength Division Multiplexing (WDM) and Orthogonal Frequency Division Multiplexing (OFDM) play key role in many of the proposed solutions.

Existing time-domain based PON solutions share the medium and are limited in throughput. WDM solutions are also based on direct detection and applying OFDM requires complex wideband coherent optical detectors which are expensive and inappropriate for mass deployment. In addition, splitting a wideband OFDM signal to many users using a regular passive power splitter results in low power efficiency.

Technology

 A novel system-wide concept, integrating WDM in the large scale with OFDM in a finer scale. Using a multi-band filter bank, the DS signal is split and associated to a group of ONUs or combined into an OFDM signal depending on the direction.

The use of field reconstruction techniques allows the ONU receiver to perform coherent detection without the need for a local oscillator. In particular this allows transmission of advanced modulation formats with high-spectral efficiency.

This novel signal/network architecture allows for multiple pilot tones to be transmitted simultaneously, and for multiple transmitters to modulate different pilot-tones, to be integrated into a single WDM channel, and detected as a single OFDM signal. Then, Integrated Optical Implementation of the ONU allows for low cost home premises equipment and enables high performance.

Advantages

  • Dramatically reduces the ONU sampling rate and complexity
  • Increases power efficiency and prevents backscattering crosstalk
  • Enables low cost home premises equipment at very high-performance, with flexible bandwidth allocation and many ONUs supported over long distances
  • Allows for doubling the data-rate and free of polarization fading
  • Enables the usage of low-bandwidth reception

 

Opportunity

  • Transmission format and standards
  • Optical access networks
  • OFDM-based optical links

Project manager

Matt Zarek
SCOUTING, IDEATION, AND TECHNOLOGY EVALUATION

Project researchers

Dan Marom
HUJI, School of Computer Science and Engineering
Applied Physics

Related keywords

  • Clean Industrial Technologies
  • Other (uncategorised)
  • Micro & Opto Electronics
  • Express Licensing

About Yissum - Research Development Company of the Hebrew University

Technology Transfer Office from Israel

Yissum Research Development Company of the Hebrew University of Jerusalem Ltd. Founded in 1964 to protect and commercialize the Hebrew University’s intellectual property. Ranked among the top technology transfer companies, Yissum has registered over 8,900 patents covering 2,500 inventions; has licensed out 800 technologies and has spun-off 90 companies. Products that are based on Hebrew University technologies and were commercialized by Yissum generate today over $2 Billion in annual sales.

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