公开(公告)号：US20150104191A1

公开(公告)日：2015-04-16

申请号：US14489393

申请日：2014-09-17

Applicant: California Institute of Technology

Inventor： Seyed Ali HAJIMIRI ,  Firooz AFLATOUNI ,  Behrooz ABIRI

IPC: H04B10/564

CPC classification number: H04B10/50577 ,  H04B10/50 ,  H04B10/90 ,  H04B2210/006

Abstract: An electro-optical oscillator includes, in part, a modulator, a signal splitter, N photodiodes with N being an integer greater than one, a signal combiner, and a filter. The modulator modulates an optical signal in accordance with a feedback signal. The splitter splits the modulated optical signal into N optical signals each delivered to a different one of N photo-diodes. Each of the N photo-diodes converts the optical signal it receives to a current signal. The signal combiner combines the N current signals received from the N photo-diodes to generate a combined current signal. The filter filters the combined current signal and generates the feedback signal. The electro-optical oscillator optionally includes, in part, N variable optical gain/attenuation components each amplifying/attenuating a different one of the N optical signals generated by the splitter.

Abstract translation: 电光振荡器部分地包括调制器，信号分离器，N是大于1的整数的N个光电二极管，信号组合器和滤波器。 调制器根据反馈信号调制光信号。 分离器将调制的光信号分成N个光信号，每个光信号被传送到不同的一个N个光电二极管。 每个N个光电二极管将其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个电流信号以产生组合电流信号。 滤波器滤除组合电流信号并产生反馈信号。 电光振荡器部分地可选地包括N个可变光学增益/衰减分量，每个可变光增益/衰减分量放大/衰减由分路器产生的N个光信号中的不同一个。

公开(公告)号：US20160033766A1

公开(公告)日：2016-02-04

申请号：US14703737

申请日：2015-05-04

Applicant: California Institute of Technology

Inventor： Seyed Ali HAJIMIRI ,  Behrooz ABIRI

IPC: G02B27/00 ,  G02B5/18 ,  H04N5/378

CPC classification number: G02B27/0087 ,  G02B5/1842 ,  H04B10/116 ,  H04N5/378

Abstract: An optical phased array (OPA) receiver selectively detects, measures and differentiates between the amplitudes and directions of signals received from different directions. Because the OPA changes the direction that it looks toward electronically and without the use of any mechanical movements, the OPA is fast, has an enhanced sensitivity, and can be used in a wide variety applications, such as lens-free imaging systems. The OPA is adapted to dynamically control the array of optical elements and focus on the area of interest. The OPA achieves a higher numerical aperture compared to imaging systems that use conventional lens, thereby effectively maintaining a relatively large field of view and collection area concurrently. The OPA may be readily scaled by increasing its array size. Furthermore, because the OPA is relatively flat, it is ideally suited for small form factor applications such as cell phones and tablets.

Abstract translation: 光学相控阵（OPA）接收机选择性地检测，测量和区分从不同方向接收的信号的振幅和方向。 因为OPA改变了它的电子方向，并且没有使用任何机械运动，所以OPA是快速的，具有增强的灵敏度，并且可以用于各种应用中，例如无镜头的成像系统。 OPA适合于动态地控制光学元件的阵列并集中在感兴趣的区域上。 与使用常规透镜的成像系统相比，OPA实现了更高的数值孔径，从而有效地保持了相对较大的视野和收集区域。 通过增加其阵列大小可以轻松地缩放OPA。 此外，由于OPA相对平坦，因此非常适用于手机和平板电脑等小尺寸应用。

公开(公告)号：US20150145350A1

公开(公告)日：2015-05-28

申请号：US14552249

申请日：2014-11-24

Applicant: California Institute of Technology

Inventor： Seyed Ali HAJIMIRI ,  Behrooz ABIRI ,  Florian BOHN

IPC: H02M7/217 ,  H03H7/01 ,  H03H7/38 ,  H02J17/00 ,  H02J5/00

CPC classification number: H02M7/217 ,  H02J5/00 ,  H02J17/00 ,  H02J50/10 ,  H02M7/003 ,  H02M7/23 ,  H02M2001/123

Abstract: A rectifying circuit includes, in part, first and second NMOS transistors, an impedance matching network, and an RF block circuit. The source and gate terminals of the first NMOS transistor respectively receive the ground potential and a biasing voltage. The second NMOS transistor has a gate terminal coupled to the drain terminal of the first NMOS transistor, a drain terminal coupled to the gate terminal of the first NMOS transistor, and a source terminal receiving the ground potential. The impedance matching network is disposed between the antenna and the drain terminals of the first and second NMOS transistors. The RF block circuit is coupled between the drain terminals of the first and second NMOS transistors and the output terminal of the rectifying circuit. The RF block circuit is adapted to prevent the RF signal from flowing into the output terminal of the rectifying circuit.

Abstract translation: 整流电路部分地包括第一和第二NMOS晶体管，阻抗匹配网络和RF块电路。 第一NMOS晶体管的源极和栅极端子分别接收接地电位和偏置电压。 第二NMOS晶体管具有耦合到第一NMOS晶体管的漏极端子的栅极端子，耦合到第一NMOS晶体管的栅极端子的漏极端子和接收地电位的源极端子。 阻抗匹配网络设置在第一和第二NMOS晶体管的天线和漏极端子之间。 RF块电路耦合在第一和第二NMOS晶体管的漏极端与整流电路的输出端之间。 RF块电路适于防止RF信号流入整流电路的输出端。

公开(公告)号：US20160306201A1

公开(公告)日：2016-10-20

申请号：US15070665

申请日：2016-03-15

Applicant: California Institute of Technology

Inventor： Saman SAEEDI ,  Behrooz ABIRI ,  Azita EMAMI ,  Seyed Ali HAJIMIRI

IPC: G02F1/025 ,  H04B10/54

CPC classification number: G02F1/025 ,  G02F2203/50 ,  H04B10/541

Abstract: A differential optical modulator includes, in part, a splitter splitting an incoming optical signal into first and second input signals, a first variable coupler generating a first differential output signal in response to the first input signal, and a second variable coupler generating a second differential output signal in response to the second input signal. The first variable coupler includes, in part, first and second couplers and a phase shifter disposed therebetween. The first coupler generates a pair of internal signals in response to the first input signal. The second coupler generates the first differential output signal. The second variable coupler includes, in part, third and fourth couplers and a phase shifter disposed therebetween. The third coupler generates a pair of internal signals in response to the second input signal. The fourth coupler generates the second differential output signal.

Abstract translation: 差分光调制器部分地包括将入射光信号分为第一和第二输入信号的分路器，响应于第一输入信号产生第一差分输出信号的第一可变耦合器，以及产生第二差分 响应于第二输入信号的输出信号。 第一可变耦合器部分地包括第一和第二耦合器以及设置在它们之间的移相器。 第一耦合器响应于第一输入信号产生一对内部信号。 第二耦合器产生第一差分输出信号。 第二可变耦合器部分地包括第三和第四耦合器以及设置在它们之间的移相器。 第三耦合器响应于第二输入信号产生一对内部信号。 第四耦合器产生第二差分输出信号。

公开(公告)号：US20160097715A1

公开(公告)日：2016-04-07

申请号：US14690190

申请日：2015-04-17

Applicant: California Institute of Technology

Inventor： Behrooz ABIRI ,  Firooz Aflatouni ,  Seyed Ali Hajimiri

IPC: G01N21/45

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。

公开(公告)号：US20140161464A1

公开(公告)日：2014-06-12

申请号：US13952493

申请日：2013-07-26

Applicant: California Institute of Technology

Inventor： Steven BOWERS ,  Firooz AFLATOUNI ,  Behrooz ABIRI ,  Seyed Ali HAJIMIRI

IPC: H04B10/2575

CPC classification number: H04B10/2575 ,  H04B10/90 ,  H04B2210/006

Abstract: A multi-port radiator radiates electromagnetic signal in response to a beat frequency of a pair of optical signals. The radiator includes a multitude of optical paths each carrying an optical signal having first and second wavelengths. A multitude of frequency conversion elements convert the optical signals to electrical signals and deliver them to the radiator's multiple ports. The frequency of the electrical signals, and hence the frequency of the electromagnetic wave, is defined by the difference between the first and second wavelengths. The phases of the optical signals received by the frequency conversion elements are shifted with respect to one another. Optionally, the difference between the phases of the optical signals travelling through each pair of adjacent paths is 90°. The first and second wavelengths are generated by a pair of optical sources and are optionally modulated before being combined and delivered to the optical paths.

Abstract translation: 多端口辐射器响应于一对光信号的拍频而辐射电磁信号。 散热器包括多个光路，每个光路承载具有第一和第二波长的光信号。 多个频率转换元件将光信号转换为电信号并将其传送到散热器的多个端口。 电信号的频率以及电磁波的频率由第一和第二波长之间的差定义。 由频率转换元件接收的光信号的相位相对于彼此移位。 可选地，穿过每对相邻路径的光信号的相位差为90°。 第一和第二波长由一对光源产生，并且在被组合和传送到光路之前可选地被调制。