公开(公告)号：US12034483B2

公开(公告)日：2024-07-09

申请号：US17834570

申请日：2022-06-07

申请人： WINGCOMM Co. Ltd.

发明人： Jianming Yu ,  Zuodong Wang ,  Wei Mao ,  Yun Bai

IPC分类号： H04B10/25 ,  H04B10/2581 ,  H04B10/50 ,  H04B10/524 ,  H04B10/54 ,  H04N7/22 ,  H04N21/4363

CPC分类号： H04B10/2581 ,  H04B10/25 ,  H04B10/503 ,  H04B10/524 ,  H04B10/541 ,  H04N7/22 ,  H04N21/43632

摘要： Systems and methods for optical transmission of one-or-more out-of-band signals associated with audio-video signal communication are described. In one aspect, an optical receiver receives a first out-of-band electrical signal and a second out-of-band electrical signal from a video sink. The first out-of-band electrical signal may correspond to an audio-video stream previously received or concurrently being received from a video source optical transmitter at the optical receiver. The second out-of-band electrical signal may also correspond to the audio-video stream. The optical receiver may combine the first out-of-band electrical signal and the second out-of-band electrical signal into a transmit electrical signal. In one aspect, the optical receiver converts the transmit electrical signal into an optical signal, and transmits the optical signal to an optical transmitter via an optical communication channel.

公开(公告)号：US12025862B2

公开(公告)日：2024-07-02

申请号：US17112369

申请日：2020-12-04

申请人： Lightelligence PTE. Ltd.

发明人： Yichen Shen ,  Huaiyu Meng ,  Arash Hosseinzadeh ,  Yelong Xu ,  Yanfei Bai ,  Ronald Gagnon ,  Cheng-Kuan Lu ,  Jonathan Terry ,  Jingdong Deng ,  Maurice Steinman

IPC分类号： G02F1/025 ,  G02F1/225 ,  H04B10/516 ,  H04B10/524 ,  H04B10/54

CPC分类号： G02F1/025 ,  G02F1/2257 ,  H04B10/5161 ,  H04B10/524 ,  H04B10/541

摘要： A system including at least one input optical waveguide configured to receive an optical wave, at least one digital input port configured to receive a series of digital input values, each digital input value including two or more bits, and an optical modulator coupled to the input optical waveguide. The optical modulator includes an optical waveguide portion that includes multiple optical waveguide segments associated with diode sections positioned along the optical waveguide segments, in which the diode sections are configured to apply different respective modulation contributions to an optical wave propagating through the optical waveguide portion.

公开(公告)号：US20240106543A1

公开(公告)日：2024-03-28

申请号：US18227260

申请日：2023-07-27

申请人： NEC Corporation

发明人： Hiroshi Imai

IPC分类号： H04B10/524 ,  H04B10/54 ,  H04L9/08

CPC分类号： H04B10/524 ,  H04B10/541 ,  H04L9/0852

摘要： An illustrative transmitter can achieve improvement in SN ratio and stability of the signal output under control at the transmission side, even in the case of an optical transmission line having the propagation characteristics susceptible to environmental changes. The transmitter includes: an optical transmission section configured to generate weak signal light and reference light from a transmission light pulse, and transmit the signal light and the reference light to the optical transmission line; and a controller configured to modulate pulse intensity and pulse width of the transmission light pulse according to a transmission line state of probe light having propagated through the optical transmission line.

公开(公告)号：US11942993B2

公开(公告)日：2024-03-26

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 ,  H04B1/69 ,  H04B10/524 ,  H04B10/54

CPC分类号： H04B10/25137 ,  G02F1/212 ,  H04B1/69 ,  H04B10/524 ,  H04B10/541 ,  H04B2001/6912

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.

公开(公告)号：US11838058B2

公开(公告)日：2023-12-05

申请号：US18127586

申请日：2023-03-28

申请人： MACOM Technology Solutions Holdings, Inc.

发明人： Daniel Draper ,  Merrick Brownlee

IPC分类号： H04B10/524 ,  H04B10/079 ,  H04B10/2581 ,  H04B10/50

CPC分类号： H04B10/524 ,  H04B10/0795 ,  H04B10/2581 ,  H04B10/50572

摘要： A multi-level optical signal is sampled to generate an eye diagram. The signal can be adjusted when eyes in the eye diagram have different heights. More specifically, a first value is determined, and the height of a first eye is adjusted using the first value. The first value is multiplied by a stored factor to produce a second value, and the height of a second eye is adjusted using the second value, and so on for other eyes. As a result, eye heights are the same. Similarly, optical power levels of the signal can be adjusted when the levels are not equally spaced. As a result, the optical power levels are equally spaced.

公开(公告)号：US11689293B2

公开(公告)日：2023-06-27

申请号：US17685043

申请日：2022-03-02

申请人： FUJITSU OPTICAL COMPONENTS LIMITED

发明人： Tomohisa Ishikawa

IPC分类号： H04B10/2507 ,  H04B10/524 ,  H04B10/54 ,  H04B10/293 ,  H04B10/80

CPC分类号： H04B10/54 ,  H04B10/2935 ,  H04B10/808 ,  H04B10/2507 ,  H04B10/524

摘要： A control device of modulating signal generates high-side signal and low-side signal. The high-side signal takes level in accordance with level of AC component of a monitor signal obtained by photoelectric conversion of modulated light, when the polarity of the AC component is positive, or its magnitude is zero. The high-side signal further takes constant level when the polarity of the AC component is negative. The low-side signal takes constant level when the polarity of the AC component is positive. The low-side signal further takes level in accordance with level of the AC component when the polarity of the AC component is negative, or its magnitude is zero. Then, the control device adjusts level of the modulating signal based on a greatest value of absolute values of levels taken by the high-side signal and a greatest value of absolute values of levels taken by the low-side signal.

公开(公告)号：US11671731B2

公开(公告)日：2023-06-06

申请号：US17510369

申请日：2021-10-25

申请人： City University of Hong Kong

发明人： Martin Garaj ,  Shu Hung Henry Chung

IPC分类号： H04Q11/00 ,  H04B10/524 ,  H04B10/11 ,  H04B10/69

CPC分类号： H04Q11/0005 ,  H04B10/11 ,  H04B10/524 ,  H04B10/69 ,  H04Q2011/0039 ,  H04Q2011/0041

摘要： The present invention provides an apparatus for facilitating a photovoltaic device to provide a wireless communication channel. The apparatus comprises a switch connected in parallel with the photovoltaic device and configured for driving the photovoltaic device to produce optical signals carrying sensed data to be transmitted; and a control module connected with the switch and configured for receiving electrical sensing signals and generate a control signal to control the switch. The apparatus provided by the present invention is extremely durable. Compared to existing communication technologies which require extra hardware, the apparatus provided by the present invention is simpler and can be integrated into a single component.

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.

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.

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.