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1. 发明申请

US20230136924A1 Method of Operating a Bidirectional Optical Transmission Link and Corresponding Optical Transmission Link 有权
公开(公告)号：US20230136924A1
公开(公告)日：2023-05-04
申请号：US17980005
申请日：2022-11-03
申请人： ADVA Optical Networking SE
发明人： Sihuan Zou , Ross Saunders , Thang Hoang
IPC分类号： H04B10/524 , H04B10/40 , H04B10/50
摘要： The invention relates to a method and apparatus of operating a bidirectional optical transmission link. The optical transmission link includes a first and a second optical transceiver at a dedicated end of the optical transmission link and an optical path connecting the first and second optical transceiver. The optical transceivers apply the methods of converting an electrical digital transmit signal into an electrical PAM-n transmit signal, pre-emphasizing the electrical PAM-n transmit signal) by digital filtering and using the pre-emphasized electrical PAM-n signal2) as modulating signal for optically modulating an optical carrier signal. The optical modulation method deployed is configured to create an optical PAM-n transmit signal with a positive or negative chirp. For initializing the optical transmission link (100), an initialization process is performed in which at least one loop including the following steps is run through creating, in the first optical transceiver, an optical PAM-n training transmit signal and transmitting it to the second optical transceiver, the optical PAM-n training transmit signal being created using an electrical PAM-n training transmit signal including a binary training sequence. Initial values for filter parameters are used for pre-emphasizing the electrical PAM-n training transmit signal and an initial value is used for a chirp parameter that defines the positive or negative chirp of the optical PAM-n training transmit signal receiving, in the second optical transceiver, the optical PAM-n training transmit signal as an optical PAM-n training receive signal using direct detection. The optical PAM-n training receive signal is converted into an electrical PAM-n training receive signal. The method includes obtaining sampled values of the electrical PAM-n training receive signal (RPel,1) by sampling this signal at predetermined points in time; and using the sampled values obtained and corresponding sampled values of an ideal electrical PAM-n transmit signal to determine operating values for the filter parameters and an operating value for the chirp parameter.

2. 发明申请

US20230034936A1 OPTICAL TRANSMISSION DEVICE AND OPTICAL COMMUNICATION SYSTEM 有权
公开(公告)号：US20230034936A1
公开(公告)日：2023-02-02
申请号：US17784104
申请日：2020-12-18
申请人： Molex, LLC
发明人： Kuen-Ting TSAI , Wei-Hung CHEN , Zuon-Min CHUANG , Yao-Wen LIANG
IPC分类号： H04B10/2513 , G02F1/21 , H04B10/524 , H04B10/54 , H04B1/69
摘要： An optical transmission device includes: a control module generate a control signal output which includes a slope adjust signal and a bias voltage offset adjust signal according to an input signal indicating a dispersion amount an electrical level adjust signal; a multi-level pulse amplitude modulator; and an asymmetrical optical modulator which is controlled by the slope adjust signal to be operated at one of a positive slope and a negative slope of a transfer function of the asymmetrical optical modulator itself, and is controlled by the bias voltage offset adjust signal of the control signal output to offset a bias voltage point of the asymmetrical optical modulator itself from a quadrature point of the transfer function, and modulates the multi-level pulse amplitude modulation signal to an optical signal to generate an optical modulate signal having a chirp.

3. 发明申请

US20220231765A1 METHOD AND SYSTEM FOR A DISTRIBUTED OPTICAL TRANSMITTER WITH LOCAL DOMAIN SPLITTING 有权
公开(公告)号：US20220231765A1
公开(公告)日：2022-07-21
申请号：US17645678
申请日：2021-12-22
申请人： Luxtera LLC
发明人： Brian WELCH , Xuelin XU
IPC分类号： H04B10/516 , H04B10/524 , H04B10/50 , H04B10/54
摘要： Methods and systems for a distributed optical transmitter with local domain splitting are disclosed and may include, in an optical modulator integrated in a silicon photonics chip: receiving electrical signals, communicating the electrical signals to domain splitters along a length of waveguides of the optical modulator via one or more delay lines, and generating electrical signals in voltage domains utilizing the domain splitters for modulating the optical signals in the waveguides of the optical modulator by driving diodes with the electrical signals generated in the voltage domains. The delay lines may comprise one delay element per domain splitter, or may comprise a delay element per domain splitter for a first subset of the domain splitters and more than one delay element per domain splitter for a second subset of the domain splitters.

4. 发明申请

US20220190927A1 OPTICAL SIGNAL COMMUNICATION METHOD AND DEVICE 有权
公开(公告)号：US20220190927A1
公开(公告)日：2022-06-16
申请号：US17600780
申请日：2020-04-01
申请人： FOUNDATION FOR RESEARCH AND BUSINESS, Seoul National University of Science and Technology
发明人： Ill Soo Sohn
IPC分类号： H04B10/54 , H04B10/077 , H04B10/524 , H04B10/67
摘要： Disclosed are an optical signal communication method, and an optical signal transmission device and an optical signal reception device which perform the method. The optical signal communication method may comprise the steps of: receiving input data to be modulated into an optical signal, modulating the input data into the optical signal, and transmitting the optical signal to an optical signal reception device, wherein the optical signal includes a start pulse and an end pulse, and a time interval between the start pulse and the end pulse is determined on the basis of a data value of the input data.

5. 发明授权

US11323105B2 Method and system for arbitrary optical pulse generation 有权
公开(公告)号：US11323105B2
公开(公告)日：2022-05-03
申请号：US16440573
申请日：2019-06-13
申请人： Fermi Research Alliance, LLC
发明人： David Johnson , Todd Johnson
IPC分类号： H03K5/02 , H01S5/062 , H03K5/00 , H04B10/508 , H04B10/524 , H03K3/014
摘要： A system, method, and apparatus for continuous seed laser pulses supplied to a CW pumped pre-amplifier and/or power-amplifier chain comprises an optical modulator configured to impress pulse signals on an optical signal, a waveform generator configured to establish a structure of the optical signal, and a keep-alive circuit that generates a continuous electrical pulse pattern provided to the optical modulator, wherein the system provides a continuous seed laser pulse structure.

6. 发明申请

US20220006532A1 COMMUNICATING OVER A FREE-SPACE OPTICAL CHANNEL USING DISTRIBUTION MATCHING 有权
公开(公告)号：US20220006532A1
公开(公告)日：2022-01-06
申请号：US17357450
申请日：2021-06-24
申请人： KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
发明人： Ahmed Mohamed ELZANATY , Mohamed-Slim ALOUINI
IPC分类号： H04B10/524 , H04B10/11 , H04B10/50 , H04B10/40
摘要： A method for optical communication between first and second transceivers over a channel in a free-space medium involves receiving a binary string of uniformly distributed bits and converting them into probabilistically-shaped unipolar M-pulse amplitude modulated (M-PAM) symbols using distribution matching. The probabilistically-shaped unipolar M-PAM symbols are mapped into a binary bit stream, which are used to generate, at a forward error correction rate, parity bits. The parity bits are mapped to uniformly-distributed unipolar M-PAM parity symbols. The probabilistically-shaped unipolar M-PAM symbols and the uniformly-distributed unipolar M-PAM parity symbols are multiplexed to form a codeword that is used to modulate the intensity of a laser so as to transmit the codeword.

7. 发明授权

US11201678B2 System for achieving multiple bits per symbol in optical communications systems by combining spatial domain multiplexing and pulse amplitude modulation 有权
公开(公告)号：US11201678B2
公开(公告)日：2021-12-14
申请号：US17102735
申请日：2020-11-24
申请人： Florida Institute of Technology, Inc.
发明人： Syed H. Murshid , Greg Lovell , Bilas Chowdhury , Ce Su , Han Wang , Rayan Enaya , Engin Eyceyurt
IPC分类号： H04J14/04 , H04J14/02 , H04B10/54 , H04B10/524 , H04B10/25 , H04B10/69
摘要： A modified optical PAM communication system using multiple laser sources to generate each amplitude level. The systems can be applied separately or in conjunction with another modulation system such as SDM, MDM, WDM, TDM, or other communication systems. In an embodiment, a PAM-4 system will increase data rate by a factor of two, but more complicated schemes using more lasers can be utilized to generate higher efficiency schemes. For example, a 25 Gbps NRZ signal will give 50 Gbps PAM-4 signal and higher laser systems can generate PAM-8 or PAM-16 for 75 and 100 Gbps systems respectively. These can be further applied to SDM systems to generate higher data rates equivalent to the number of SDM channels multiplied by the PAM efficiency. In embodiments, the invention may combing PAM with WDM and SDM to achieve multiple bits per symbol.

8. 发明申请

US20210384979A1 INFORMATION COMMUNICATION USING EQUIPMENT INDICATOR LIGHTS 有权
公开(公告)号：US20210384979A1
公开(公告)日：2021-12-09
申请号：US16892022
申请日：2020-06-03
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Stefan DAHLFORT
IPC分类号： H04B10/50 , H04B10/116 , H04B10/524 , H04B10/61 , H04L12/24
摘要： A method by a mobile device for conveying information communicated via a plurality of discrete indicator lights of an electronic device. The method includes capturing, via an image capturing component of the mobile device, a light pattern emitted by the plurality of discrete indicator lights of the electronic device, where the light pattern communicates information related to the electronic device according to a pre-defined light pattern scheme, interpreting the light pattern in accordance with the pre-defined light pattern scheme to determine the information communicated by the light pattern, and conveying the information communicated by the light pattern to an end user.

9. 发明授权

US11153011B2 Intelligent visible light with a gallium and nitrogen containing laser source 有权
公开(公告)号：US11153011B2
公开(公告)日：2021-10-19
申请号：US16992029
申请日：2020-08-12
申请人： KYOCERA SLD Laser, Inc.
发明人： Melvin McLaurin , James W. Raring , Paul Rudy , Vlad Novotny
IPC分类号： H04B10/116 , H01S5/343 , G02B27/09 , H04B10/50 , H01S5/40 , H01S5/02251 , H01S5/00 , H01S5/22 , H04B10/572 , H01L33/00 , H04B10/564 , H04B10/524 , H04B10/60 , H01S5/02212 , H01S5/02 , H01S5/10 , H01S5/32 , H01S5/02216 , H01S5/20 , H01S5/026 , H01S5/042 , H04B10/114 , H01S5/02326 , H01S5/02345
摘要： A smart light source configured for visible light communication. The light source includes a controller comprising a modem configured to receive a data signal and generate a driving current and a modulation signal based on the data signal. Additionally, the light source includes a light emitter configured as a pump-light device to receive the driving current for producing a directional electromagnetic radiation with a first peak wavelength in the ultra-violet or blue wavelength regime modulated to carry the data signal using the modulation signal. Further, the light source includes a pathway configured to direct the directional electromagnetic radiation and a wavelength converter optically coupled to the pathway to receive the directional electromagnetic radiation and to output a white-color spectrum. Furthermore, the light source includes a beam shaper configured to direct the white-color spectrum for illuminating a target of interest and transmitting the data signal.

10. 发明申请

US20210273728A1 Network Security and Variable Pulse Wave Form with Continuous Communication 有权
公开(公告)号：US20210273728A1
公开(公告)日：2021-09-02
申请号：US17323601
申请日：2021-05-18
申请人： Federal Law Enforcement Development Services, Inc.
发明人： Felicity-John C. Pederson , Timothy J. Vogt
IPC分类号： H04B10/524 , H04B10/116 , H04B10/50 , H04B10/40
摘要： A pulsed light communication device has a plurality of indicator light emitting diodes emitting diodes emitting at least one of a plurality of wavelengths of colored light to correspond to a designated color assigned to a security level for a network. A continuous uninterrupted modulated pulsed light emitting diode light signal may be generated having a sensitivity threshold detection level exceeding minimal parameters of a photodetector.

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