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    Automatic gain control loop
    1.
    发明授权
    Automatic gain control loop 有权

    公开(公告)号：US10756690B2

    公开(公告)日：2020-08-25

    申请号：US16807631

    申请日：2020-03-03

    申请人： Elenion Technologies, LLC

    发明人： Mostafa Ahmed ,  Alexander Rylyakov

    IPC分类号： H03F3/08 ,  H03G3/30 ,  H04B10/69 ,  H03G1/00 ,  H03F3/68 ,  H03F3/16

    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.

    GROUND CAGE FOR AN INTEGRATED OPTICAL DEVICE
    2.
    发明申请
    GROUND CAGE FOR AN INTEGRATED OPTICAL DEVICE 审中-公开

    公开(公告)号：US20200249540A1

    公开(公告)日：2020-08-06

    申请号：US16265496

    申请日：2019-02-01

    申请人： Elenion Technologies, LLC

    发明人： Daihyun Lim ,  Alexander Rylyakov ,  Yangjin Ma

    IPC分类号： G02F1/225

    摘要： A photonic chip including an integrated optoelectronic device is flip-chip mounted to a carrier. The optoelectronic device is provided with a 3D ground cage as a shield for stray EM radiation. The 3D ground cage is formed by a device ground electrode partially enclosing the optoelectronic device on a face of the chip, a carrier ground electrode disposed opposite to the device ground electrode, and a plurality of metal pillars therebetween at least partially surrounding the optoelectronic device. The optoelectronic device may be an OE converter of an integrated optical receiver. The optoelectronic device may also be an EO converter of an integrated optical transmitter.

    Dual loop bias circuit with offset compensation
    6.
    发明授权
    Dual loop bias circuit with offset compensation 有权

    公开(公告)号：US10955691B2

    公开(公告)日：2021-03-23

    申请号：US16439825

    申请日：2019-06-13

    申请人： Elenion Technologies, LLC

    发明人： Ariel Leonardo Vera Villarroel ,  Abdelrahman Ahmed ,  Daihyun Lim ,  Alexander Rylyakov

    IPC分类号： G02F1/01 ,  G02F1/225 ,  H03G3/30 ,  H03F3/45 ,  G02F1/21

    摘要： Within a modulator driver, different blocks are employed, e.g. a buffer, one or more variable gain amplifiers (VGA), and a final driver stage. Each of these blocks has an optimum bias point for best performance; however, interconnecting the blocks requires sharing the DC bias points in their interface, which does not necessarily match the optimum performance bias point of each block. Accordingly, a first offset feedback loop extending from reference points after a selected one of the blocks to an input of one of the blocks. The first offset feedback loop includes current sources capable of delivering a variable current to the input of the selected block in order to compensate any offset in an amplified differential input electrical signal measured at the reference points. A first bias feedback loop is also provided, including a current sinker for subtracting excess current introduced in the first offset compensation feedback loop.

    COHERENT OPTICAL RECEIVER
    7.
    发明申请
    COHERENT OPTICAL RECEIVER 审中-公开

    公开(公告)号：US20200382217A1

    公开(公告)日：2020-12-03

    申请号：US16424580

    申请日：2019-05-29

    申请人： Elenion Technologies, LLC

    发明人： Richard C. Younce ,  Alexander Rylyakov ,  Michael J. Hochberg

    IPC分类号： H04B10/61 ,  H04B10/532 ,  H04B10/67 ,  G02B6/293 ,  G02F1/225

    摘要： A coherent optical receiver for AM optical signals has a photonic integrated circuit (PIC) as an optical front-end. The PIC includes a polarization beam splitter followed by two optical hybrids each followed by an opto-electric (OE) converter. Each OE converter includes one or more differential detectors and one or more squaring circuits, which outputs may be summed. The PIC may further include integrated polarization controllers, wavelength demultiplexers, and/or tunable dispersion compensators.

    RECONFIGURABLE OPTICAL RECEIVERS WITH EXTENDED DYNAMIC RANGE
    8.
    发明申请
    RECONFIGURABLE OPTICAL RECEIVERS WITH EXTENDED DYNAMIC RANGE 审中-公开

    公开(公告)号：US20200083855A1

    公开(公告)日：2020-03-12

    申请号：US16126732

    申请日：2018-09-10

    申请人： Elenion Technologies, LLC

    发明人： Ariel Leonardo Vera Villarroel ,  Abdelrahman Ahmed ,  Alexander Rylyakov

    IPC分类号： H03G3/30 ,  H03F3/08 ,  H03F3/45

    摘要： In optical receivers, extending the transimpedance amplifier's (TIA) dynamic range is a key to increasing the receiver's dynamic range, and therefore increase the channel capacity. Ideally, the TIA requires controllable gain, whereby the receiver can modify the characteristics of the TIA and/or the VGA to process high power incoming signals with a defined maximum distortion, and low power incoming signals with a defined maximum noise. A solution to the problem is to provide TIA's and VGA's with reconfigurable sizes, which are adjustable based on the level of power, e.g. current, generated by the photodetector.