公开(公告)号：US06396051B1

公开(公告)日：2002-05-28

申请号：US09589942

申请日：2000-06-07

申请人： Jinghui Li ,  Eric Swanson ,  John Zyskind

发明人： Jinghui Li ,  Eric Swanson ,  John Zyskind

IPC分类号： G01J400

CPC分类号： G02B6/29322 ,  H04B10/07953

摘要： An apparatus for measuring the optical-signal-to-noise ratio (OSNR) of an optical system is adapted to function in single channel or in multi-channel wavelength division multiplexed optical communication systems. An optical signal spectrum and a center frequency characterize the optical signals. A narrow-band notch filter, realized by an in-fiber Bragg grating, is utilized to remove a component of the signal so the remaining signal can be measured. When multiple channels are present, a bandpass filter is used to select the part of the multiplexed signal to be measured. Both the narrow-band notch filter and the bandpass filter can be tunable to further extend the capabilities of the system. Two detectors are utilized with the power in the channel being measured by a low-gain detector and the power in the noise being measured by a high-gain detector. A processor receives the detector outputs, calculates OSNR, and controls the tunable components.

摘要翻译： 用于测量光学系统的光信噪比（OSNR）的装置适于在单通道或多通道波分复用光通信系统中起作用。 光信号频谱和中心频率表征光信号。 使用由光纤内布拉格光栅实现的窄带陷波滤波器来去除信号的分量，从而可以测量剩余的信号。 当存在多个通道时，使用带通滤波器来选择待测量的复用信号的一部分。 窄带陷波滤波器和带通滤波器都可以调节，以进一步扩展系统的功能。 利用两个检测器，通道中的功率由低增益检测器测量，噪声中的功率由高增益检测器测量。 处理器接收检测器输出，计算OSNR，并控制可调组件。

公开(公告)号：US11802759B2

公开(公告)日：2023-10-31

申请号：US17221835

申请日：2021-04-04

申请人： Eric Swanson

发明人： Eric Swanson

IPC分类号： G01B9/02 ,  G01B9/02091 ,  G01B9/02001 ,  G01B9/02055 ,  G06T11/00 ,  G01B9/02004 ,  G01B9/02015

CPC分类号： G01B9/02091 ,  G01B9/02004 ,  G01B9/02011 ,  G01B9/02015 ,  G01B9/02067 ,  G06T11/005 ,  G06T11/008

摘要： An interferometric measurement system includes ports configured to receive an optical signal from an optical source and an optical signal from a target. A photonic integrated circuit includes a variable delay configured to select between at least two optical paths from the input to an output such that the optical signal from the optical source passes to the output while experiencing an optical delay based on a selected one of the at least two optical paths where a loss of the optical signal from the optical source provided to the input that passes to the output is nominally the same for each of the at least two optical paths. An optical receiver is configured to receive the optical signal from the target and to receive the optical signal from the optical source that experiences the optical delay based on the selected one of the at least two optical paths and generates a corresponding electrical receive signal at an electrical output. A processor is configured to generate an interferometric measurement signal based on the receive signal.

公开(公告)号：US11681093B2

公开(公告)日：2023-06-20

申请号：US16865454

申请日：2020-05-04

申请人： Eric Swanson ,  Anthony Kam

发明人： Eric Swanson ,  Anthony Kam

IPC分类号： A61B1/00 ,  A61B1/07 ,  A61B3/10 ,  A61B5/00 ,  A61B5/02 ,  G02B6/02 ,  G01B9/02091

CPC分类号： G02B6/02042 ,  A61B1/0016 ,  A61B1/00096 ,  A61B1/00167 ,  A61B1/00172 ,  A61B1/00177 ,  A61B1/07 ,  A61B3/10 ,  A61B5/0066 ,  A61B5/0084 ,  A61B5/02007 ,  A61B5/6852 ,  G01B9/02091

摘要： An optical probe imaging system includes an optical probe having a multicore optical fiber. Distal optics image light propagating in the multicore optical fiber so as to generate a light pattern on a sample that is based on a relative position of the cores. A distal motor causes the light pattern to traverse a path across the sample. An optical receiver includes a first receiver receiving light that has traversed the path across the sample from one of the at least two cores and a second receiver receiving light that has traversed the path across the sample from the other of the cores, such that the first receiver and the second receiver detect light in parallel. A processor maps relative position of the cores at the distal facet based on signals generated by the receiver.

公开(公告)号：US11579356B2

公开(公告)日：2023-02-14

申请号：US17577062

申请日：2022-01-17

申请人： Eric Swanson

发明人： Eric Swanson

IPC分类号： G02B6/02 ,  G01N21/17 ,  G02B6/293 ,  A61B5/00 ,  G01B9/02004 ,  G01B9/02 ,  G01B9/02091 ,  G01B9/02055 ,  G01N21/39 ,  G01N21/47 ,  H04B10/61 ,  G01S7/481 ,  G01S17/89 ,  G02F1/29

摘要： An integrated optical system includes a wavelength tunable optical source and a photonic integrated circuit (PIC). The PIC includes a set of spatial waveguide switches having an input optically coupled to the wavelength tunable optical source and a plurality of outputs. The PIC also includes an optical emitter having a plurality of inputs, each being coupled to a respective one of the plurality of outputs of the set of spatial waveguide switches, the optical emitter configured to produce at an output an optical beam having a wavelength dependent emission direction that changes as light is switched by the set of spatial waveguide switches such that the optical beam may be steered in two dimensions.

公开(公告)号：US11243346B2

公开(公告)日：2022-02-08

申请号：US17019228

申请日：2020-09-12

申请人： Eric Swanson

发明人： Eric Swanson

IPC分类号： G01N21/17 ,  G02B6/02 ,  G02B6/293 ,  A61B5/00 ,  G01B9/02 ,  G01N21/39 ,  G01N21/47 ,  H04B10/61 ,  G01S7/481 ,  G01S17/89 ,  G02F1/29

摘要： An optical-fiber measurement system includes an optical transceiver comprising an optical transmitter and an optical receiver. A multi-core optical fiber has a proximal end with a first optical core coupled to the transceiver and a second optical core coupled to the transceiver, and a distal end with the first optical core coupled to a sample path that is configured to convey light collected from a sample positioned external to the multi-core optical fiber and the second optical core coupled to a reference path such that the sample path and the reference path experience mostly a same disturbance along the multi-core optical fiber. The optical receiver is configured to interferometrically detect light from the sample path and light from the reference path.

公开(公告)号：US20210278196A1

公开(公告)日：2021-09-09

申请号：US17327629

申请日：2021-05-21

申请人： Eric Swanson

发明人： Eric Swanson ,  Christopher Doerr

IPC分类号： G01B9/02 ,  H01S3/10

摘要： A wavelength tunable laser device includes a gain element positioned in an optical cavity that provides optical gain to an optical signal. A frequency shifter that generates a frequency shift as a function of time is positioned in the optical cavity. The optical cavity is configured so that a magnitude of the frequency shift as a function of time generated by the frequency shifter is substantially equal to a frequency separation of a cavity mode of the cavity such that an output of the cavity generates laser light having a wavelength that tunes as a function of time.

公开(公告)号：US10741910B2

公开(公告)日：2020-08-11

申请号：US16018537

申请日：2018-06-26

申请人： Eric Swanson

发明人： Eric Swanson

IPC分类号： G02F1/01 ,  H01Q3/26 ,  G02B27/00 ,  H01S3/067 ,  A61B1/00 ,  G01S17/89 ,  G01S7/481 ,  A61B5/00

摘要： An optical system for producing an optical probe beam includes an optical source that generates a free-space optical beam. An optical element is positioned in a path of the free-space optical beam to project the free-space optical beam to generate a projected free-space optical beam. A photonic integrated phased-array component positioned in a path of the projected free-space optical beam to reflect the projected free space optical beam, thereby generating the optical probe beam. The photonic integrated phased-array component comprises a plurality of antenna elements and a substrate positioned proximate to the plurality of antenna elements, wherein the substrate includes a plurality of fan-out electrical connections from at least some of the plurality of antenna elements such that a size of a region comprising the fan-out electrical connections is larger than a size of a region comprising the plurality of antenna elements.

公开(公告)号：US10132610B2

公开(公告)日：2018-11-20

申请号：US15244503

申请日：2016-08-23

申请人： Eric Swanson

发明人： Eric Swanson ,  Christopher Doerr

IPC分类号： G01B9/02

摘要： Disclosed herein are optical integration technologies, designs, systems and methods directed toward Optical Coherence Tomography (OCT) and other interferometric optical sensor, ranging, and imaging systems wherein such systems, methods and structures employ tunable optical sources, coherent detection and other structures on a single or multichip monolithic integration. In contrast to contemporary, prior-art OCT systems and structures that employ simple, miniature optical bench technology using small optical components positioned on a substrate, systems and methods according to the present disclosure employ one or more photonic integrated circuits (PICs), use swept-source techniques, and employ a widely tunable optical source(s).

公开(公告)号：US20170052015A1

公开(公告)日：2017-02-23

申请号：US15244503

申请日：2016-08-23

申请人： Eric Swanson

发明人： Eric Swanson ,  Christopher Doerr

IPC分类号： G01B9/02

CPC分类号： G01B9/02051 ,  G01B9/02004 ,  G01B9/02069 ,  G01B9/02091

摘要： Disclosed herein are optical integration technologies, designs, systems and methods directed toward Optical Coherence Tomography (OCT) and other interferometric optical sensor, ranging, and imaging systems wherein such systems, methods and structures employ tunable optical sources, coherent detection and other structures on a single or multichip monolithic integration. In contrast to contemporary, prior-art OCT systems and structures that employ simple, miniature optical bench technology using small optical components positioned on a substrate, systems and methods according to the present disclosure employ one or more photonic integrated circuits (PICs), use swept-source techniques, and employ a widely tunable optical source(s).

摘要翻译： 本文公开的是针对光学相干层析成像（OCT）和其他干涉光学传感器，范围和其中这样的系统，方法和结构采用可调谐光源，相干检测和其他结构的光学集成技术，设计，系统和方法 单芯片或多芯片单片集成。 与采用使用位于衬底上的小型光学组件的简单的微型光学平台技术的现代的现有技术的OCT系统和结构不同，根据本公开的系统和方法采用一个或多个光子集成电路（PIC），使用扫描 源技术，并采用广泛可调谐的光源。

公开(公告)号：US06369738B1

公开(公告)日：2002-04-09

申请号：US09404667

申请日：1999-09-23

申请人： Eric Swanson

发明人： Eric Swanson

IPC分类号： H03M112

CPC分类号： G01R23/167

摘要： A time domain data converter with output frequency domain conversion. A data conversion circuit is operable to receive a signal in the time domain and provide an output in the frequency domain. It includes a data converter for converting data from an analog format to a digital format in the time domain. It also includes a processor for processing the data in the digital format output from the data converter through a time domain/frequency domain transform to provide data in the digital format in the frequency domain. The output of the frequency domain operation or the time domain operation can be provided for output in response to the generation of a data ready signal.

摘要翻译： 具有输出频域转换的时域数据转换器。 数据转换电路可操作以在时域中接收信号并在频域中提供输出。 它包括一个数据转换器，用于在时域中将数据从模拟格式转换为数字格式。 它还包括一个处理器，用于通过时域/频域变换处理从数据转换器输出的数字格式的数据，以提供数字格式的频域数据。 可以响应于数据就绪信号的产生而提供频域操作或时域操作的输出用于输出。