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公开(公告)号：US20200014566A1
公开(公告)日：2020-01-09
申请号：US16576156
申请日：2019-09-19
摘要： An optical coherent receiver includes an optical hybrid (OH) configured to mix signal and reference light, and two back-end optical ports. An optical equalizing network interconnects two 180° OH output ports with the two back-end optical ports so that each back-end optical port receives light from each of the two OH output ports. Optical signals from each of the two back-end optical ports are converted to electrical signals that are fed to a differential amplifier. Adjusting coupling ratios and/or optical delays in the optical equalizing network reduces an OSNR penalty of a lower-bandwidth differential amplifier.
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公开(公告)号：US10451903B2
公开(公告)日：2019-10-22
申请号：US15864188
申请日：2018-01-08
发明人： Ran Ding , Thomas Wetteland Baehr-Jones , Peter D. Magill , Michael J. Hochberg , Alexander Rylyakov
摘要： An optical modulator apparatus may include a plurality of segment drivers, each segment driver having a unique offset voltage and driving but a portion or a segment of an electro-optical modulator. A modulating electrical signal may be applied to the segment drivers via a plurality of electrical delays. Parameters of the segment drivers may be selected so as to approximate a pre-defined transfer function, which may include a linear or a non-linear transfer function.
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公开(公告)号：US20190296706A1
公开(公告)日：2019-09-26
申请号：US16200852
申请日：2018-11-27
发明人： Mostafa Ahmed , Alexander Rylyakov
摘要： In conventional optical receivers the dynamic range is obtained by using variable gain amplifiers (VGA) with a fixed trans-impedance amplifier (TIA) gain. To overcome the SNR problems inherent in conventional receivers an improved optical receiver comprises an automatic gain control loop for generating at least one gain control signal for controlling gain of both the VGA and the TIA. Ideally, both the resistance and the gain of the TIA are controlled by a gain control signal.
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公开(公告)号：US20190253149A1
公开(公告)日：2019-08-15
申请号：US16398422
申请日：2019-04-30
IPC分类号： H04B10/556 , G02F1/225 , H04B10/50 , G02F1/01 , H04B10/54 , G02F1/025 , H04B10/516
CPC分类号： H04B10/5561 , G02F1/0123 , G02F1/025 , G02F1/2257 , G02F2001/212 , G02F2201/127 , H04B10/505 , H04B10/5161 , H04B10/541
摘要： A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.
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公开(公告)号：US20190109647A1
公开(公告)日：2019-04-11
申请号：US16220203
申请日：2018-12-14
IPC分类号： H04B10/556 , G02F1/225 , H04B10/50 , G02F1/01 , H04B10/54 , G02F1/025 , H04B10/516
摘要： A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.
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公开(公告)号：US20190094648A1
公开(公告)日：2019-03-28
申请号：US16202818
申请日：2018-11-28
发明人： Christopher Williams , Mostafa Ahmed , Alexander Rylyakov , Richard C. Younce , Yang Liu , Ran Ding , Abdelrahman Ahmed
IPC分类号： G02F1/225
CPC分类号： G02F1/2255 , G02F1/2257 , G02F2001/212 , G02F2201/122
摘要： A multi-section optical modulator and related method wherein two waveguide arms traverse a plurality of successive modulating sections. A differential drive signal is applied separately to each waveguide arm of each modulating sections in synchronism with the transmission of light along the waveguide arms, effecting a dual differential driving of each section. By suitably selecting the number of modulating sections and the section length, a high modulation bandwidth and a high modulation efficiency may be achieved simultaneously for a given peak-to-peak voltage swing of the drive signal.
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公开(公告)号：US20180341164A1
公开(公告)日：2018-11-29
申请号：US15602657
申请日：2017-05-23
发明人： Christopher Williams , Mostafa Ahmed , Alexander Rylyakov , Richard C. Younce , Yang Liu , Ran Ding , Abdelrahman Ahmed
IPC分类号： G02F1/225
CPC分类号： G02F1/2255 , G02F1/2257 , G02F2001/212 , G02F2201/122
摘要： A multi-section optical modulator and related method wherein two waveguide arms traverse a plurality of successive modulating sections. A differential drive signal is applied separately to each waveguide arm of each modulating sections in synchronism with the transmission of light along the waveguide arms, effecting a dual differential driving of each section. By suitably selecting the number of modulating sections and the section length, a high modulation bandwidth and a high modulation efficiency may be achieved simultaneously for a given peak-to-peak voltage swing of the drive signal.
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公开(公告)号：US20180198534A1
公开(公告)日：2018-07-12
申请号：US15916448
申请日：2018-03-09
发明人： Alexander Rylyakov , Richard Younce , Ran Ding , Peter D. Magill , Hao Li , Michael J. Hochberg
CPC分类号： H04B10/6971 , H04B10/524 , H04B10/541 , H04B10/58 , H04B10/69 , H04L25/03057 , H04L25/03885 , H04L27/06 , H04L2025/03369
摘要： A high data rate, high sensitivity, low power optical link using low-bandwidth components and low-bandwidth E/O drivers and receivers and method of building same. The method is based on the idea of making the optical part of the link look like a bandwidth limited lossy electrical channel, so that the powerful equalization methods used in the wireline electrical links can be applied to recover the transmitted data in a situation with low bandwidth and/or high loss and strong inter-symbol interference. Linear and non-linear optical channel components, E/O drivers and receivers can benefit from the apparatus and the methods of the invention.
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公开(公告)号：US20180083710A1
公开(公告)日：2018-03-22
申请号：US15830351
申请日：2017-12-04
IPC分类号： H04B10/556 , G02F1/025 , H04B10/516 , H04B10/54 , G02F1/01 , G02F1/225 , G02F1/21
CPC分类号： H04B10/5561 , G02F1/0123 , G02F1/025 , G02F1/2257 , G02F2001/212 , G02F2201/127 , H04B10/505 , H04B10/5161 , H04B10/541
摘要： A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.
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公开(公告)号：US11209674B2
公开(公告)日：2021-12-28
申请号：US16846885
申请日：2020-04-13
发明人： Ran Ding , Thomas Wetteland Baehr-Jones , Peter D. Magill , Michael J. Hochberg , Alexander Rylyakov
摘要： An optical modulator apparatus may include a plurality of segment drivers, each segment driver having a unique offset voltage and driving but a portion or a segment of an electro-optical modulator. A modulating electrical signal may be applied to the segment drivers via a plurality of electrical delays. Parameters of the segment drivers may be selected so as to approximate a pre-defined transfer function, which may include a linear or a non-linear transfer function.
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