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公开(公告)号：US20220149967A1
公开(公告)日：2022-05-12
申请号：US17436570
申请日：2020-02-27
申请人： Cambridge Enterprise Limited , Consorzio Nazionale Interuniversitario per le Telecomunicazioni (CNIT)
IPC分类号： H04J14/02 , H04B10/548 , H04B10/2513
摘要： A Wavelength Division Multiplexing (WDM) for an optical fibre comprising a set of optical inputs, one for each wavelength of a WDM optical signal to be transmitted, a graphene electro-absorption modulator (EAM) for each optical input to modulate light from the optical input, and one or more drivers to drive each graphene electro-absorption modulator. The drivers have a data input, a low pass filter to low-pass filter data from the data input to provide low pass filtered data, and an output to drive each graphene electro-absorption modulator with a combination of the low pass filtered data and a bias voltage. The bias voltage is configured to bias the graphene EAM into a region in which, e.g., when the transmission of the graphene electro-absorption modulator increases the effective refractive index for the modulated light decreases and vice-versa to pre-chirp to the modulated light to compensate for dispersion in the fibre.
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公开(公告)号：US11695479B2
公开(公告)日：2023-07-04
申请号：US17436575
申请日：2020-02-27
申请人： Cambridge Enterprise Limited , Consorzio Nazionale Interuniversitario per le Telecomunicazioni (CNIT)
CPC分类号： H04B10/40 , H04B1/38 , H04B10/64 , H04B2210/006
摘要： An RF transmitter comprising an optical source configured to generate a pair of optical lines separated by an RF carrier frequency. The transmitter may comprise a graphene photodetector having at least two electrical contacts; a transmit antenna coupled to a first of the electrical contacts; and an electrical data signal input connected to a second of the electrical contacts. The graphene photodetector is illuminated by the optical source; it may comprise a graphene photo-thermal effect (PTE) photodetector or a bolometric photodetector. A corresponding receiver is also described.
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公开(公告)号：US20220149946A1
公开(公告)日：2022-05-12
申请号：US17436575
申请日：2020-02-27
申请人： Cambridge Enterprise Limited , Consorzio Nazionale Interuniversitario per le Telecomunicazioni (CNIT)
摘要： An RF transmitter comprising an optical source configured to generate a pair of optical lines separated by an RF carrier frequency. The transmitter may comprise a graphene photodetector having at least two electrical contacts; a transmit antenna coupled to a first of the electrical contacts; and an electrical data signal input connected to a second of the electrical contacts. The graphene photodetector is illuminated by the optical source; it may comprise a graphene photo-thermal effect (PTE) photodetector or a bolometric photodetector. A corresponding receiver is also described.
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公开(公告)号：US10061081B2
公开(公告)日：2018-08-28
申请号：US15524005
申请日：2015-11-03
发明人： Luciano Socci , Marco Romagnoli
CPC分类号： G02B6/126 , G02B6/1228 , G02B6/14 , G02B2006/12116
摘要： In an integrated polarization splitting and rotating photonic device comprising at least one first waveguide; a second waveguide, both said waveguides extending from an input section to an output section; a top cladding; a bottom cladding and a symmetry-breaking layer so as to form an optical guiding structure in a wafer chip, said top and bottom claddings extending throughout the whole optical guiding structure sandwiching said waveguides therebetween, said symmetry-breaking layer extends in the optical guiding structure at least over the whole guiding structure length, and, at the input section, the at least one first waveguide core has a predetermined width through the optical guiding structure to the output section, receiving an input light signal, and further, the second waveguide core, both at the input and the output section, has a width narrower than said predetermined width of the first waveguide core; so that the optical guiding structure guides a first mode substantially confined within said at least one first waveguide core and a second mode substantially confined within said second semiconductor waveguide core said first and said second modes having the same polarization at the output section.
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公开(公告)号：US12081319B2
公开(公告)日：2024-09-03
申请号：US17436570
申请日：2020-02-27
申请人： Cambridge Enterprise Limited , Consorzio Nazionale Interuniversitario per le Telecomunicazioni (CNIT)
IPC分类号： H04J14/02 , H04B10/2513 , H04B10/548
CPC分类号： H04J14/02 , H04B10/25137 , H04B10/548
摘要： A Wavelength Division Multiplexing (WDM) for an optical fibre comprising a set of optical inputs, one for each wavelength of a WDM optical signal to be transmitted, a graphene electro-absorption modulator (EAM) for each optical input to modulate light from the optical input, and one or more drivers to drive each graphene electro-absorption modulator. The drivers have a data input, a low pass filter to low-pass filter data from the data input to provide low pass filtered data, and an output to drive each graphene electro-absorption modulator with a combination of the low pass filtered data and a bias voltage. The bias voltage is configured to bias the graphene EAM into a region in which, e.g., when the transmission of the graphene electro-absorption modulator increases the effective refractive index for the modulated light decreases and vice-versa to pre-chirp to the modulated light to compensate for dispersion in the fibre.
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公开(公告)号：US20170315294A1
公开(公告)日：2017-11-02
申请号：US15524005
申请日：2015-11-03
发明人： Luciano SOCCI , Marco ROMAGNOLI
CPC分类号： G02B6/126 , G02B6/1228 , G02B6/14 , G02B2006/12116
摘要： In an integrated polarization splitting and rotating photonic device comprising at least one first waveguide; a second waveguide, both said waveguides extending from an input section to an output section; a top cladding; a bottom cladding and a symmetry-breaking layer so as to form an optical guiding structure in a wafer chip, said top and bottom claddings extending throughout the whole optical guiding structure sandwiching said waveguides therebetween, said symmetry-breaking layer extends in the optical guiding structure at least over the whole guiding structure length, and, at the input section, the at least one first waveguide core has a predetermined width through the optical guiding structure to the output section, receiving an input light signal, and further, the second waveguide core, both at the input and the output section, has a width narrower than said predetermined width of the first waveguide core; so that the optical guiding structure guides a first mode substantially confined within said at least one first waveguide core and a second mode substantially confined within said second semiconductor waveguide core said first and said second modes having the same polarization at the output section.
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公开(公告)号：US10708179B2
公开(公告)日：2020-07-07
申请号：US16091258
申请日：2017-03-27
发明人： Giuseppe Bianchi , Salvatore Pontarelli , Marco Bonola , Carmelo Cascone , Davide Sanvito , Antonio Capone
IPC分类号： G06F15/173 , H04L12/721 , H04L12/771 , H04L12/715 , H04L12/741
摘要： The apparatus (SW) has a plurality of input/output ports (P1, P2, P3, P4, P5) for receiving and transmitting data packets, and comprises a data packets handling circuitry (DPL) arranged to forward data packets between the input/output ports (P1, P2, P3, P4, P5) and an internal apparatus controller (CPL) arranged to control the data packet handling circuitry (DPL); the apparatus controller (CPL) is arranged to store (MEM) at least one state transition table (TT) to be used for controlling the forwarding of data packets by the data packets handling circuitry (DPL); the apparatus controller (CPL) is arranged to use the state transition table (TT) for implementing at least one finite state machine (FSM); the apparatus controller (CPL) is arranged to use the state transition table (TT) for handling separately distinct incoming data packets flows through corresponding distinct instances of finite state machine; the state transition table (TT) corresponds to the combination of a state table (ST), a condition table (CT) and a flow table (FT); the apparatus controller (CPL) is arranged to store (MEM) the state table (ST), the condition table (CT) and the flow table (FT); the apparatus controller (CPL) comprises a condition logic (CL) for calculating conditions stored in the condition table (CT) based on data from the state table (ST) in order to query the flow table (FT).
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