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公开(公告)号：US20200213025A1
公开(公告)日：2020-07-02
申请号：US16813504
申请日：2020-03-09
Applicant: INPHI CORPORATION
Inventor： Radhakrishnan L. NAGARAJAN
Abstract: An integrated apparatus with optical/electrical interfaces and protocol converter on a single silicon substrate. The apparatus includes an optical module comprising one or more modulators respectively coupled with one or more laser devices for producing a first optical signal to an optical interface and one or more photodetectors for detecting a second optical signal from the optical interface to generate a current signal. Additionally, the apparatus includes a transmit lane module coupled between the optical module and an electrical interface to receive a first electric signal from the electrical interface and provide a framing protocol for driving the one or more modulators. Furthermore, the apparatus includes a receive lane module coupled between the optical module and the electrical interface to process the current signal to send a second electric signal to the electrical interface.
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公开(公告)号：US20190363799A1
公开(公告)日：2019-11-28
申请号：US16536162
申请日：2019-08-08
Applicant: INPHI CORPORATION
Inventor： Todd ROPE , Radhakrishnan L. NAGARAJAN , Hari SHANKAR
IPC: H04B10/516 , H04B10/556 , H04B10/50 , H04J14/02 , H01S5/14 , G02F1/01 , G02F1/225 , H01S5/0687 , H01S5/40
Abstract: The present invention relates to telecommunication techniques and integrated circuit (IC) devices. More specifically, embodiments of the present invention provide an off-quadrature modulation system. Once an off-quadrature modulation position is determined, a ratio between DC power transfer amplitude and dither tone amplitude for a modulator is as a control loop target to stabilize off-quadrature modulation. DC power transfer amplitude is obtained by measuring and sampling the output of an optical modulator. Dither tone amplitude is obtained by measuring and sampling the modulator output and performing calculation using the optical modulator output values and corresponding dither tone values. There are other embodiments as well.
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公开(公告)号：US20190288786A1
公开(公告)日：2019-09-19
申请号：US16431492
申请日：2019-06-04
Applicant: INPHI CORPORATION
Inventor： Radhakrishnan L. NAGARAJAN
Abstract: An integrated apparatus with optical/electrical interfaces and protocol converter on a single silicon substrate. The apparatus includes an optical module comprising one or more modulators respectively coupled with one or more laser devices for producing a first optical signal to an optical interface and one or more photodetectors for detecting a second optical signal from the optical interface to generate a current signal. Additionally, the apparatus includes a transmit lane module coupled between the optical module and an electrical interface to receive a first electric signal from the electrical interface and provide a framing protocol for driving the one or more modulators. Furthermore, the apparatus includes a receive lane module coupled between the optical module and the electrical interface to process the current signal to send a second electric signal to the electrical interface.
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公开(公告)号：US20180375587A1
公开(公告)日：2018-12-27
申请号：US15633353
申请日：2017-06-26
Applicant: INPHI CORPORATION
Inventor： Todd ROPE , Sung CHOI , James STEWART , Radhakrishnan L. NAGARAJAN , Paul YU , Ilya LYUBOMIRSKY
CPC classification number: H04B10/614 , G02B6/12007 , G02B6/29347 , H04B10/07953 , H04B10/675 , H04B10/677 , H04B10/69 , H04B17/20 , H04L27/06 , H04L27/18
Abstract: The present invention is directed to a communication signal tracking system comprising an optical receiver including one or more delay line interferometers (DLIs) configured to demultiplex incoming optical signals and a transimpedance amplifier configured to convert the incoming optical signals to incoming electrical signals. The communication signal tracking system further includes a control module configured to calculate a bit-error-rate (BER) of the incoming electrical signals before forward-error correction decoding, and use the BER as a parameter for optimizing settings of the one or more DLIs in one or more iterations in a control loop and generating a back-channel data.
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公开(公告)号：US20180329852A1
公开(公告)日：2018-11-15
申请号：US16040817
申请日：2018-07-20
Applicant: INPHI CORPORATION
Inventor： Siddharth SHETH , Radhakrishnan L. NAGARAJAN
IPC: G06F13/42
CPC classification number: G06F13/42 , G06F13/364 , G06F13/4072 , G06F13/4282 , G06F15/7807 , G06F15/7817 , H04L1/0003 , H04L25/03006 , H04L27/34
Abstract: The present invention provides an integrated system-on-chip device. The device is configured on a single silicon substrate member. The device has a data input/output interface provided on the substrate member. The device has an input/output block provided on the substrate member and coupled to the data input/output interface. The device has a signal processing block provided on the substrate member and coupled to the input/output block. The device has a driver module provided on the substrate member and coupled to the signal processing block. The device further includes a driver interface and coupled to the driver module and configured to be coupled to a silicon photonics device. In an example, a control block is configured to receive and send instruction(s) in a digital format to the communication block and is configured to receive and send signals in an analog format to communicate with the silicon photonics device.
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Patent Agency Ranking
公开(公告)号：US20180299629A1
公开(公告)日：2018-10-18
申请号：US16013737
申请日：2018-06-20
Applicant: INPHI CORPORATION
Inventor： Radhakrishnan L. NAGARAJAN , Peng-Chih LI , Masaki KATO
IPC: G02B6/42 , H04B10/516 , H04B10/40
CPC classification number: G02B6/4246 , G02B6/421 , G02B6/4215 , G02B6/4249 , G02B6/4256 , G02B6/4278 , G02B6/428 , G02B6/4292 , H04B10/40 , H04B10/516
Abstract: A photonic transceiver apparatus in QSFP package. The apparatus includes a case having a base member, two partial side members, and a lid member to provide a spatial volume with an opening at a back end of the base member. Additionally, the apparatus includes a PCB, installed inside the spatial volume over the base member having a pluggable electrical connector at the back end. Further, the apparatus includes multiple optical transmitting devices in mini-transmit-optical-sub-assembly package, each being mounted on a common support structure and having a laser output port in reversed orientation toward the back end. Furthermore, the apparatus includes a silicon photonics chip, including a fiber-to-silicon attachment module, mounted on the PCB and coupled to a modulation driver module and a trans-impedance amplifier module. Moreover, the apparatus includes a pair of optical input/output ports being back connected to the fiber-to-silicon attachment module.
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公开(公告)号：US20180262273A1
公开(公告)日：2018-09-13
申请号：US15976659
申请日：2018-05-10
Applicant: INPHI CORPORATION
Inventor： Radhakrishnan L. NAGARAJAN , Todd ROPE
IPC: H04B10/524 , H03M1/68 , G02F1/01 , G02F1/225 , G02F1/21
CPC classification number: H04B10/524 , G02F1/0123 , G02F1/2255 , G02F1/2257 , G02F2001/212 , H03M1/682 , H04B10/5161 , H04B10/541
Abstract: A single chip dual-channel driver for two independent traveling wave modulators. The driver includes two differential pairs inputs per channel respectively configured to receive two digital differential pair signals. The driver further includes a two-bit DAC per channel coupled to the two differential pairs inputs to produce a single analog differential pair PAM signal at a differential pair output for driving a traveling wave modulator. Additionally, the driver includes a control block having internal voltage/current signal generators respective coupled to each input and the 2-bit DAC for providing a bias voltage, a tail current, a dither signal to assist modulation control per channel. Furthermore, the driver includes an internal I2C communication block coupled to a high-speed clock generator to generate control signals to the control block and coupled to host via an I2C digital communication interface.
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公开(公告)号：US20180109324A1
公开(公告)日：2018-04-19
申请号：US15832296
申请日：2017-12-05
Applicant: INPHI CORPORATION
Inventor： Radhakrishnan L. NAGARAJAN , Todd ROPE
IPC: H04B10/524 , H03M1/68 , G02F1/01 , G02F1/225 , G02F1/21
CPC classification number: H04B10/5161 , G02F1/0123 , G02F1/2255 , G02F1/2257 , G02F2001/212 , H03M1/682 , H04B10/524 , H04B10/541
Abstract: A single chip dual-channel driver for two independent traveling wave modulators. The driver includes two differential pairs inputs per channel respectively configured to receive two digital differential pair signals. The driver further includes a two-bit DAC per channel coupled to the two differential pairs inputs to produce a single analog differential pair PAM signal at a differential pair output for driving a traveling wave modulator. Additionally, the driver includes a control block having internal voltage/current signal generators respective coupled to each input and the 2-bit DAC for providing a bias voltage, a tail current, a dither signal to assist modulation control per channel. Furthermore, the driver includes an internal I2C communication block coupled to a high-speed clock generator to generate control signals to the control block and coupled to host via an I2C digital communication interface.
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公开(公告)号：US20180039027A1
公开(公告)日：2018-02-08
申请号：US15786156
申请日：2017-10-17
Applicant: INPHI CORPORATION
Inventor： Masaki KATO , Radhakrishnan L. NAGARAJAN
CPC classification number: G02B6/305 , G02B6/1228 , G02B6/136 , G02B6/26 , G02B2006/12061
Abstract: An apparatus for converting fiber mode to waveguide mode. The apparatus includes a silicon substrate member and a dielectric member having an elongated body. Part of the elongated body from a back end overlies the silicon substrate member and remaining part of the elongated body up to a front end is separated from the silicon substrate member by a second dielectric material at an under region. The apparatus also includes a waveguide including a segment from the back end to a tail end formed on the dielectric member at least partially overlying the remaining part of the elongated body. The segment is buried in a cladding overlying entirely the dielectric member. The cladding has a refractive index that is less than the waveguide but includes an index-graded section with decreasing index that is formed at least over the segment from the tail end toward the back end.
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公开(公告)号：US20170093513A1
公开(公告)日：2017-03-30
申请号：US15375031
申请日：2016-12-09
Applicant: INPHI CORPORATION
Inventor： Radhakrishnan L. NAGARAJAN
Abstract: An integrated apparatus with optical/electrical interfaces and protocol converter on a single silicon substrate. The apparatus includes an optical module comprising one or more modulators respectively coupled with one or more laser devices for producing a first optical signal to an optical interface and one or more photodetectors for detecting a second optical signal from the optical interface to generate a current signal. Additionally, the apparatus includes a transmit lane module coupled between the optical module and an electrical interface to receive a first electric signal from the electrical interface and provide a framing protocol for driving the one or more modulators. Furthermore, the apparatus includes a receive lane module coupled between the optical module and the electrical interface to process the current signal to send a second electric signal to the electrical interface.
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