Optical OFDM Transceiver Development and Commercialisation

Disgrifiad o Effaith

The strong growth of interest in OOFDM following research initiated by Tang in 2005 has led to OOFDM being extensively explored world-wide by major telecommunication equipment/system vendors, service/network providers, telecommunication research institutes and universities. In view of the large commercial potential of this technology, Bangor has identified three principal means to maximise the industrial and economic impact of its OOFDM research and expertise: 1) promoting OOFDM to standards bodies; 2) establishing the Bangor spin-off company Smarterlight 3) providing design services to international telecommunications vendors/ manufacturers. Since 2008, Bangor has used its research-based expertise to actively promote OOFDM technology to various standards bodies by: working closely with major international telecommunications companies; participating in and co-ordinating FP7 projects; delivering seminars at companies; hosting industrial visitors and working with companies involved in standards task groups. Since 2010 the Full Service Access Network (FSAN) Next-Generation PON (NGPON) task group consisting of leading network providers and vendors worldwide considered OOFDM as a strong candidate for NG-PON2 (ITU-T G989.1) standards [5.1]. However in 07/2012 the FSAN adopted time-wavelength division multiplexing (TWDM) as the primary technology for NG-PON2. In addition, since 2012 the IEEE 40Gb/s and 100Gb/s Fibre Optic Task Force group has also considered OOFDM as a candidate technology for high-speed Ethernet systems (IEEE802.3bm standards) [5.2]. In a group meeting in 05/2013 no consensus was reached concerning the candidate technologies and thus a new IEEE 802.3 400Gb/s Ethernet Study Group was subsequently formed, which recommends OOFDM as a candidate technology [5.2]. In order to further the impact of Bangor OOFDM research, the Bangor University spin-off company, Smarterlight Limited (07813373) was registered on 18 Oct 2011. Smarterlight is dedicated to using its protected OOFDM technology to develop portable, “future-proof”, cost-effective transceivers offering end-users with >20Gb/s symmetrical download/upload speeds with guaranteed quality of services at price levels currently applied to 20Mb/s services. Smarterlight is in receipt of a total of £1.1M first phase funding: In 07/2012, Smarterlight secured a £600k commercialisation grant plus a 5-year rental-free office space of 500m2 from Xiamen City Council, China [5.3], which has established a hi-tech incubation and innovation platform to promote technology transfer to address the central government strategy of “Broadband China and Optical City” announced in 2011. In 2013 Finance Wales agreed to make a first phase investment into Smarterlight of approximately £500k [5.4]. In addition, Xiamen City Council has agreed to provide total funding up to £2.3m when Smarterlight meets defined performance targets [5.3]. At present, 8 people are working on Smarterlight projects with a revenue stream of £200k having been identified in 2013 [5.5]. In 2012, Smartlight was engaged by Huawei (the biggest global telecommunication equipment vendor) 1) to develop OOFDM multiple access PON solutions for the Advanced Technologies Department of Access Optical Networks in Shenzhen, China [5.6], and 2) to investigate the feasibility of utilising OOFDM to upgrade installed 10Gb/s metropolitan networks to 40Gb/s for the Huawei’s R&D Centre in the US [5.7]. The successful completion of these projects will lead Huawei to develop corresponding commercial product lines. Since September 2012 we have impacted technological advancement in respect of Fujitsu Labs (Atsugi, Japan) new product lines addressing 400Gb/s data centre interconnections [5.8].

Crynodeb Effaith ar gyfer y Cyhoedd

Pioneering research at Bangor on the advanced communications technology termed Optical
Orthogonal Frequency Division Multiplexing (OOFDM) has enabled industrial impact with global
implications. OOFDM was a candidate technique for the ITU-T G989.1 NG-PON2 and the IEEE
802.3bm standards and is currently under consideration by the IEEE 802.3 400Gb/s Ethernet
Study Group. Supported by 8 patent families and first-phase funding of £1.1M, in 2013, the prerevenue
Bangor University spin-off company Smarterlight Limited, was established. Smarterlight
has deployed services to several international telecommunications companies to develop
advanced solutions for access optical networks and data centres.

Disgrifiad o'r ymchwil sylfaenol

Driven by emerging bandwidth-hungry services, end-users’ demand for bandwidth increases >70%
year-on-year. British Telecom has predicted that each subscriber will require >1Gb/s by 2016.
Existing copper cable-based access networks have become the main obstacles to providing the
ultra-wide bandwidths required. Passive optical networks (PONs) offer an attractive means for
meeting the defined requirements. Cost effectiveness and flexibility are the key challenges for wide
deployment of PONs. Great research and development effort has therefore been directed at
identifying effective, “future-proof” technologies to meet predicted end-user requirements.
On his appointment to a lectureship at Bangor on 01/01/2005, and following his world-first proposal
of OOFDM (OFC/NFOEC Paper OFP3, 2005), Tang initiated a vigorous research programme
which led to publications detailing investigations of the transmission performances of OOFDM
signals over Multi-Mode-Fibre-based Ethernet links and Single-Mode-Fibre-based PON systems
[3.1,3.2] This work established the strengths of OOFDM inherent advantages including highly
spectral efficiency, excellent cost-effectiveness, great system flexibility and performance
robustness, as well as digital signal processing (DSP)-enabled rich transceiver/network
intelligence. The area of research has grown rapidly since 2005 such that over the past five years,
OOFDM related research papers represent approximately 10% of the total number of
communications-related papers published in world-leading journals and major international
communications conferences.
Tang’s research group (currently having 15 full-time researchers) includes a key member of staff
Dr Roger Giddings (PhD student at Bangor since 05/2008, Lecturer since 2012) and has made
pioneering contributions to diverse aspects of OOFDM including fundamental operating principles
[3.1], cost-effective modulation/demodulation [3.1,3.2], high-speed DSP algorithms [3.3], highcapacity
and intelligent transceiver designs/implementations [3.3], simple, accurate, high-speed
and low-overhead system/network synchronization [3.4], effective linear/nonlinear
component/system impairment reduction], high-speed transmission over SMF and MMF-based
systems, as well as bidirectional, point-to-multipoint PON networks [3.5]. Since 2005 Bangor has
published more than 150 OOFDM papers including 3 invited papers in international-leading
journals, given more than 10 invited tutorials/presentations in major international communication
conferences, and secured 14 research grants of total value £4M.
Research at Bangor has, in particular, generated extensive “know-how” for addressing difficulties
associated with the implementation of highly complex, computationally intense and high-speed
DSP algorithms with sufficient precision. Using that know-how Bangor was able to make the world
first experimental demonstration of a series of end-to-end real-time intelligent OOFDM transceivers
at record-high speeds of up to 30Gb/s (ECOC2013, P.6.7.5) and corresponding networks, utilisinglow-cost and “off-the-shelf” optical/electrical components. Our recent investigations have indicated
that 4GS/s-enabled 40Gb/s real-time multi-band OOFDM transceivers are also achievable.
Since 2005, Bangor has filed eight patent families covering all core features of OOFDM ranging
from DSP algorithms, transceiver architectures, point-to-point systems and point-to-multipoint
networks [3.6]. Technical inventions which have been protected include high-speed/adaptive
transceiver designs, system/network synchronisation techniques, low-cost intensity modulatorbased
optical conversion, simplified network architectures and techniques for improving the
upstream network performance.
Three Bangor-patented synchronisation techniques and intelligent transceiver designs capable of
automatically adapting to component/system/network imperfections have been built into Bangor’s
world-only real-time test-beds of multiple access OOFDM PONs. The test-beds have also been
equipped with sufficient networking intelligence supporting fully end-user-controlled channel
add/drop functions, which are a revolutionary feature for realising future elastic optical networks.
Bangor’s extensive research has shown that OOFDM is feasible for mass deployment in costsensitive
application scenarios.
Bangor’s OOFDM work has received significant international interest from both the academic and
industrial sectors and has led to fruitful international research collaborations with major system
vendors, service providers, transceiver manufactures and universities European Commission
including the current €3.07M FP7 PIANO+ Project (2011-2014) , “Optical OFDM for Cost-Effective
Access Networks (OCEAN)” coordinated by Tang.

Buddiolwyr a cyrhaeddiad effaith ymchwil

low-cost and “off-the-shelf” optical/electrical components. Our recent investigations have indicated
that 4GS/s-enabled 40Gb/s real-time multi-band OOFDM transceivers are also achievable.
Since 2005, Bangor has filed eight patent families covering all core features of OOFDM ranging
from DSP algorithms, transceiver architectures, point-to-point systems and point-to-multipoint
networks [3.6]. Technical inventions which have been protected include high-speed/adaptive
transceiver designs, system/network synchronisation techniques, low-cost intensity modulatorbased
optical conversion, simplified network architectures and techniques for improving the
upstream network performance.
Three Bangor-patented synchronisation techniques and intelligent transceiver designs capable of
automatically adapting to component/system/network imperfections have been built into Bangor’s
world-only real-time test-beds of multiple access OOFDM PONs. The test-beds have also been
equipped with sufficient networking intelligence supporting fully end-user-controlled channel
add/drop functions, which are a revolutionary feature for realising future elastic optical networks.
Bangor’s extensive research has shown that OOFDM is feasible for mass deployment in costsensitive
application scenarios.
Bangor’s OOFDM work has received significant international interest from both the academic and
industrial sectors and has led to fruitful international research collaborations with major system
vendors, service providers, transceiver manufactures and universities European Commission
including the current €3.07M FP7 PIANO+ Project (2011-2014) , “Optical OFDM for Cost-Effective
Access Networks (OCEAN)” coordinated by Tang.

Statws effaith	Ar Gau
Dyddiad effaith	2008 → 2013
Lefel yr effaith	Budd