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公开(公告)号：US20170168233A1
公开(公告)日：2017-06-15
申请号：US14791187
申请日：2015-07-02
Applicant: California Institute of Technology
Inventor： Firooz Aflatouni , Behrooz Abiri , Seyed Ali Hajimiri
Abstract: An optical phased array includes, in part, a multitude of optical signal emitters and a multitude of optical signal phase/delay elements each associated with and disposed between a different pair of the optical signal emitters. Each optical signal phase/delay element is adapted to cause a phase/delay shift between the optical signals emitted from its associated pair of optical signal emitters. Each optical signal phase/delay element is optically a ring resonator that includes a p-i-n junction. By varying the bias applied to the p-i-n junction, the phase/delay generated by the ring resonator is varied. Furthermore, each optical signal emitter is optionally an optical grating having a multitude of grooves. The groove lengths of the optical gratings are optionally selected so as to increase along the direction of travel of the input optical signal through the optical phase array.
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公开(公告)号：US09482886B2
公开(公告)日：2016-11-01
申请号：US13684061
申请日：2012-11-21
Applicant: California Institute of Technology
Inventor： Firooz Aflatouni , Behrooz Abiri , Seyed Ali Hajimiri
IPC: G02F1/035 , G02F1/01 , H04B10/2507 , H04B10/67
CPC classification number: G02F1/011 , G02F1/0121 , H04B10/2507 , H04B10/671
Abstract: An integrated optical linewidth reduction system detects/estimates the phase noise of an incoming optical signal and subtracts the detected phase noise from the phase noise of the incoming signal. A first coupler/splitter of the linewidth reduction system may split the incoming signal into first and second optical signals travelling through first and second optical paths. A second coupler/splitter may split the second optical signal into third and fourth optical signals travelling through third and fourth optical paths. The third optical path has a longer propagation delay than the fourth optical path. Two different coupling ratios of the third and fourth optical signals are used to generate an electrical signal representative of the phase noise of the incoming signal. A phase detector/estimator estimates the phase noise from the electrical signal. A phase modulator subtracts the detected/estimated phase noise from the phase noise of the incoming signal.
Abstract translation: 集成光学线宽降低系统检测/估计输入光信号的相位噪声，并从输入信号的相位噪声中减去检测到的相位噪声。 线宽降低系统的第一耦合器/分离器可以将输入信号分离成通过第一和第二光路行进的第一和第二光信号。 第二耦合器/分离器可以将第二光信号分离成通过第三和第四光路行进的第三和第四光信号。 第三光路具有比第四光路更长的传播延迟。 使用第三和第四光信号的两种不同的耦合比来产生表示输入信号的相位噪声的电信号。 相位检测器/估计器从电信号估计相位噪声。 相位调制器从输入信号的相位噪声中减去检测/估计的相位噪声。
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公开(公告)号：US20180101083A1
公开(公告)日：2018-04-12
申请号：US15728245
申请日：2017-10-09
Applicant: California Institute of Technology
Inventor： Firooz Aflatouni , Seyed Ali Hajimiri
IPC: G02F1/29
CPC classification number: G02F1/292 , G02F1/293 , G02F2203/24
Abstract: An optical phase array, includes, in part, N optical signal emitting elements, and N lenses each associated with a different one of the N optical signal emitting elements and positioned to form an image of its associated signal emitting element, where N is an integer greater than 1. The optical signal emitting elements may be a grating coupler, an edge coupler, and the like. At least a number of the lenses may be formed from Silicon. The optical phased array may optionally include one or more concave or convex lenss positioned between the signal emitting elements and the N lenses. The optical signal emitting elements may be formed in a silicon dioxide layer formed above a semiconductor substrate and the lenses may be formed from Silicon disposed above the silicon dioxide layer. The optical signal emitting elements may receive an optical signal generated by the same source.
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4.发明授权Integrated wide target range optical coupling-based mach-zehnder sensor 有权集成的目标范围广泛的基于光耦合的马赫 - 泽德传感器公开(公告)号：US09523639B2
公开(公告)日：2016-12-20
申请号：US14690190
申请日：2015-04-17
Applicant: California Institute of Technology
Inventor： Behrooz Abiri , Firooz Aflatouni , Seyed Ali Hajimiri
CPC classification number: G01N21/45 , G01N2021/458 , G01N2201/08
Abstract: A sensor includes, in part, a multitude of splitters/couplers and optical couplers. One of the splitter/couplers splits an incoming optical signal into first and second optical signals. A first optical coupler includes, in part, a through path receiving the first signal, a coupled path, and an exposure window receiving a sample undergoing sensing by the sensor. The second optical coupler includes, in part, a through path receiving the second signal, and a coupled path. A first output port of the sensor supplies the optical signal travelling in the through path of the first optical coupler. A second splitter/coupler combines the optical signals travelling in the coupled paths of the first and second optical couplers to generate a second output signal delivered to a second output port. An optional third output port supplies the optical signal travelling in the through path of the second optical coupler.
Abstract translation: 传感器部分地包括多个分离器/耦合器和光耦合器。 一个分离器/耦合器将输入的光信号分成第一和第二光信号。 第一光耦合器部分地包括接收第一信号的通路，耦合路径和接收由传感器进行感测的样本的曝光窗口。 第二光耦合器部分地包括接收第二信号的通路和耦合路径。 传感器的第一输出端口提供在第一光耦合器的通路中行进的光信号。 第二分路器/耦合器组合在第一和第二光耦合器的耦合路径中行进的光信号，以产生传送到第二输出端口的第二输出信号。 可选的第三输出端口提供在第二光耦合器的通路中行进的光信号。
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公开(公告)号：US09124373B2
公开(公告)日：2015-09-01
申请号：US13684018
申请日：2012-11-21
Applicant: California Institute of Technology
Inventor： Firooz Aflatouni , Behrooz Abiri , Seyed Ali Hajimiri
IPC: H04B10/50 , H04B10/548 , H04B10/25 , H04B10/60
CPC classification number: H04B10/548 , H04B10/2504 , H04B10/501 , H04B10/50577 , H04B10/60
Abstract: An integrated optical phased array includes an input channel receiving an optical input signal, and a multitude of signal processing channels each adapted to supply an associated optical output signal along a first axis in response to the input signal. Each signal processing channel includes, in part, a phase modulator adapted to modulate the phase of the signal travelling through the channel, thereby to control or steer the output signal of the phased array. Each channel optionally includes first and second photo detection circuits respectively generating first and second detection signals. The first and second detection signals in each channel may be used to modulate the amplitude and/or phase of the output signal of that channel thereby to control and steer the output signal of the phased array.
Abstract translation: 集成的光学相控阵列包括接收光输入信号的输入通道和多个信号处理通道，每个信号处理通道适于响应输入信号沿第一轴提供相关的光输出信号。 每个信号处理通道部分地包括相位调制器，其适于调制通过通道传播的信号的相位，从而控制或引导相控阵列的输出信号。 每个通道可选地包括分别产生第一和第二检测信号的第一和第二光电检测电路。 每个通道中的第一和第二检测信号可以用于调制该通道的输出信号的幅度和/或相位，从而控制和引导相控阵列的输出信号。
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Patent Agency Ranking
公开(公告)号：US11249369B2
公开(公告)日：2022-02-15
申请号：US15728245
申请日：2017-10-09
Applicant: California Institute of Technology
Inventor： Firooz Aflatouni , Seyed Ali Hajimiri
IPC: G02F1/29
Abstract: An optical phased array includes, in part, N optical signal emitting elements, and N lenses each associated with a different one of the N optical signal emitting elements and positioned to form an image of its associated signal emitting element, where N is an integer greater than 1. The optical signal emitting elements may be a grating coupler, an edge coupler, and the like. At least a number of the lenses may be formed from Silicon. The optical phased array may optionally include one or more concave or convex lens positioned between the signal emitting elements and the N lenses. The optical signal emitting elements may be formed in a silicon dioxide layer formed above a semiconductor substrate and the lenses may be formed from Silicon disposed above the silicon dioxide layer. The optical signal emitting elements may receive an optical signal generated by the same source.
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公开(公告)号：US10795188B2
公开(公告)日：2020-10-06
申请号：US15728329
申请日：2017-10-09
Applicant: California Institute of Technology
Inventor： Firooz Aflatouni , Seyed Ali Hajimiri
Abstract: An optical phase shifter includes, in part, a waveguide, a heating element adapted to heat the waveguide, and a cooling element adapted to cool the waveguide. The heating element may be integrated within a substrate in which the waveguide is formed. The cooling element is biased to maintain the temperature of the waveguide within a predefined range characterized by a substantially high gradient of the thermal constant of the waveguide. The optical phase shifter may optionally include a substrate on which the waveguide is positioned. The substrate may include, in part, through substrate vias for supplying electrical signals to the cooling element. A control circuit supplies electrical signals to the heating and cooling elements. The control circuit may maintain the cooling element and heating element on concurrently. Alternatively, the control circuit may turn off the cooling element before turning on the heating element.
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公开(公告)号：US20170063460A1
公开(公告)日：2017-03-02
申请号：US14489354
申请日：2014-09-17
Applicant: California Institute of Technology
Inventor： Seyed Ali HAJIMIRI , Firooz Aflatouni , Behrooz Abiri
IPC: H04B10/25 , H04B10/516
CPC classification number: H04B10/2504 , H04B10/00 , H04B10/516 , H04B2210/006
Abstract: An electro-optical circuit, includes in part, a modulator, a signal splitter, N signal paths each having one or more signal processing components, N photo-diodes and a signal combiner. The modulator modulates an optical signal using an electrical input signal. The splitter splits the modulated optical signal into N optical signals each delivered to a different one of the N paths for processing by the associated signal processing component(s). Each photo-diode converts an optical signal it receives from its associated optical signal processing component(s) to a current signal. The signal combiner combines the N current signals it receives from the N photo-diodes to generate an output current signal. The signal processing component(s) may be a variable optical delay component, a variable optical gain/attenuation component, or both thus enabling the output current signal to represent a filtered version of the electrical input signal.
Abstract translation: 电光电路部分地包括调制器，信号分离器，每个具有一个或多个信号处理组件的N个信号路径，N个光电二极管和信号组合器。 调制器使用电输入信号调制光信号。 分离器将调制的光信号分离成N个光信号，每个光信号被递送到N个路径中的不同的一个，用于由相关联的信号处理组件进行处理。 每个光电二极管将其从相关联的光信号处理组件接收的光信号转换为电流信号。 信号组合器组合从N个光电二极管接收的N个电流信号以产生输出电流信号。 信号处理组件可以是可变光学延迟分量，可变光学增益/衰减分量，或两者都使得输出电流信号能够表示电输入信号的滤波版本。
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公开(公告)号：US20150331193A1
公开(公告)日：2015-11-19
申请号：US14716735
申请日：2015-05-19
Applicant: California Institute of Technology
Inventor： Behrooz Abiri , Seyed Ali Hajimiri , Firooz Aflatouni , Andy Zhou
IPC: G02B6/28 , H01L31/105 , G02B6/293
CPC classification number: H04B10/671 , G02B6/2861 , G02B6/2935 , G02B6/29352
Abstract: A self-equalizing photo-detector (SEPD) includes, in part, a multitude of optical splitters and photo detectors, and at least one optical delay element. The first optical splitter splits an optical signal into second and third optical signals. The optical delay element delays the second optical signal to generate a fourth optical signal. The second optical splitter splits a signal representative of the fourth optical signal to generate fifth and sixth optical signals. The first photo detector receives the third optical signal via a first optical path, has an anode terminal coupled to an output terminal of the detector and a cathode terminal coupled to a first supply voltage. The second photo detector receives the sixth optical signal via a second optical path, has an anode terminal coupled to a second supply voltage and a cathode terminal coupled to the output terminal of the detector.
Abstract translation: 自平衡光检测器（SEPD）部分包括多个光分路器和光电检测器以及至少一个光延迟元件。 第一光分路器将光信号分离成第二和第三光信号。 光延迟元件延迟第二光信号以产生第四光信号。 第二光分路器分离代表第四光信号的信号以产生第五和第六光信号。 第一光电检测器经由第一光路接收第三光信号，具有耦合到检测器的输出端的阳极端子和耦合到第一电源电压的阴极端子。 第二光电检测器经由第二光路接收第六光信号，具有耦合到第二电源电压的阳极端子和耦合到检测器的输出端子的阴极端子。
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公开(公告)号：US09081252B2
公开(公告)日：2015-07-14
申请号：US13770980
申请日：2013-02-19
Applicant: California Institute of Technology
Inventor： Firooz Aflatouni , Behrooz Abiri , Seyed Ali Hajimiri
Abstract: An optical phased array includes, in part, a multitude of optical signal emitters and a multitude of optical signal phase/delay elements each associated with and disposed between a different pair of the optical signal emitters. Each optical signal phase/delay element is adapted to cause a phase/delay shift between the optical signals emitted from its associated pair of optical signal emitters. Each optical signal phase/delay element is optically a ring resonator that includes a p-i-n junction. By varying the bias applied to the p-i-n junction, the phase/delay generated by the ring resonator is varied. Furthermore, each optical signal emitter is optionally an optical grating having a multitude of grooves. The groove lengths of the optical gratings are optionally selected so as to increase along the direction of travel of the input optical signal through the optical phase array.
Abstract translation: 光相位阵列部分地包括多个光信号发射器和多个光信号相位/延迟元件，每个光信号相位/延迟元件与不同的一对光信号发射器相关联并设置在不同的光信号发射器对之间。 每个光信号相位/延迟元件适于在从其相关联的光信号发射器对发射的光信号之间引起相位/延迟偏移。 每个光信号相位/延迟元件是光学上包括p-i-n结的环形谐振器。 通过改变施加到p-i-n结的偏置，环形谐振器产生的相位/延迟是变化的。 此外，每个光信号发射器可选地是具有多个凹槽的光栅。 可选地选择光栅的槽长度，以沿着输入光信号通过光相阵列的行进方向增加。
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