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1. 发明授权

US11598848B2 Optical pulse clipper for lidar 有权
公开(公告)号：US11598848B2
公开(公告)日：2023-03-07
申请号：US16563336
申请日：2019-09-06
申请人： Dominic John Goodwill , Patrick Dumais
发明人： Dominic John Goodwill , Patrick Dumais
IPC分类号： G02F1/295 , G02F1/025 , G01S7/484 , G01S7/10 , G01S7/481 , H01S3/00 , G01S17/10 , G02F1/015
摘要： Aspects of the disclosure provide a system and method used for time-of-flight lidar applications. Such systems and methods include a laser and pulse clipper which produces a shuttering effect to reduce the instantaneous output power from the pulse clipper. Accordingly the output from the pulse clipper is more suitable for time-of-flight lidar applications than that initially produced by the laser. This can allow for lasers which may otherwise exceed eye safety limits to be used for time-of-flight lidar applications without exceeding the eye safety limits.

2. 发明申请

US20170293086A1 SWITCH MATRIX INCORPORATING POLARIZATION CONTROLLER 有权
公开(公告)号：US20170293086A1
公开(公告)日：2017-10-12
申请号：US15095746
申请日：2016-04-11
申请人： Chunshu Zhang , Dominic John Goodwill
发明人： Chunshu Zhang , Dominic John Goodwill
IPC分类号： G02B6/35 , G02F1/01 , G02B6/293
CPC分类号： G02B6/3594 , G02B6/2935 , G02B6/3546 , G02B6/355 , G02F1/011 , H04Q11/0005
摘要： Optical inputs to photonic switches may incorporate a polarization controller in order to change the polarization of the input signal to a pre-determined polarization for operation with the silicon photonics. A last stage of components of the polarization controller may overlap with a first input switching stage. A polarization controller that overlaps with the first stage of the switch input may provide lower insertion loss and power consumption for the photonic switch.

3. 发明授权

US09784921B1 Switch matrix incorporating polarization controller 有权
公开(公告)号：US09784921B1
公开(公告)日：2017-10-10
申请号：US15095746
申请日：2016-04-11
申请人： Chunshu Zhang , Dominic John Goodwill
发明人： Chunshu Zhang , Dominic John Goodwill
IPC分类号： G02F1/01 , G02B6/35 , G02B6/293
CPC分类号： G02B6/3594 , G02B6/2935 , G02B6/3546 , G02B6/355 , G02F1/011 , H04Q11/0005
摘要： Optical inputs to photonic switches may incorporate a polarization controller in order to change the polarization of the input signal to a pre-determined polarization for operation with the silicon photonics. A last stage of components of the polarization controller may overlap with a first input switching stage. A polarization controller that overlaps with the first stage of the switch input may provide lower insertion loss and power consumption for the photonic switch.

4. 发明申请

US20080181607A1 TECHNIQUE FOR PHOTONIC SWITCHING 失效
标题翻译：光电开关技术
公开(公告)号：US20080181607A1
公开(公告)日：2008-07-31
申请号：US12060616
申请日：2008-04-01
申请人： Dominic John Goodwill , Mirjana Vukovic
发明人： Dominic John Goodwill , Mirjana Vukovic
IPC分类号： H04J14/02
CPC分类号： H04Q11/0005 , H04B10/801 , H04J14/02 , H04Q2011/0016 , H04Q2011/0037
摘要： A technique for photonic switching is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for photonic switching. The method may comprise receiving at least one optical signal at a photonic line card, wherein the at least one optical signal comprises one or more wavelength channels and the photonic line card comprises at least one integrated optical switch. The method may also comprise routing at least one of the one or more wavelength channels through the at least one integrated optical switch to a photonic bus, wherein the photonic bus comprises a plurality of optical paths and each of the plurality of optical paths is capable of carrying multiple wavelength channels.
摘要翻译：公开了一种用于光子切换的技术。在一个特定的示例性实施例中，该技术可以被实现为用于光子切换的方法。该方法可以包括在光子线卡处接收至少一个光信号，其中所述至少一个光信号包括一个或多个波长信道，并且光子线卡包括至少一个集成光开关。该方法还可以包括将一个或多个波长信道中的至少一个通过至少一个集成光开关路由到光子总线，其中光子总线包括多个光路，并且多个光路中的每一个能够携带多个波长信道。

5. 发明授权

US11828829B2 Apparatus and method for scanning and ranging with eye-safe pattern 有权
公开(公告)号：US11828829B2
公开(公告)日：2023-11-28
申请号：US16562884
申请日：2019-09-06
申请人： Dominic John Goodwill
发明人： Dominic John Goodwill
IPC分类号： G01S17/89 , G01S17/90 , G01S17/04 , G01S7/481 , G01S7/484 , G01S7/497 , G01S7/483
CPC分类号： G01S17/89 , G01S7/484 , G01S7/4811 , G01S7/4814 , G01S7/4817 , G01S7/4972 , G01S17/04 , G01S17/90 , G01S7/483
摘要： An optical apparatus comprises: a light source configured to emit light composed of a sequence of shots; and a steering device optically coupled to the light source and configured to steer the shots emitted by the light source in accordance with a predefined scan pattern such that at least one intermediate shot is emitted by the light source between a first shot directed by the steering device within an aperture defined by an eye safety regulation and a subsequent, second shot directed by the steering device within the same aperture, each intermediate shot being directed by the steering device outside the aperture.

6. 发明申请

US20190391240A1 Optical Pulse Clipper for Lidar 审中-公开
公开(公告)号：US20190391240A1
公开(公告)日：2019-12-26
申请号：US16563336
申请日：2019-09-06
申请人： Dominic John GOODWILL , Patrick DUMAIS
发明人： Dominic John GOODWILL , Patrick DUMAIS
IPC分类号： G01S7/481 , G02F1/025 , G02F1/295 , G01S7/484
摘要： Aspects of the disclosure provide a system and method used for time-of-flight lidar applications. Such systems and methods include a laser and pulse clipper which produces a shuttering effect to reduce the instantaneous output power from the pulse clipper. Accordingly the output from the pulse clipper is more suitable for time-of-flight lidar applications than that initially produced by the laser. This can allow for lasers which may otherwise exceed eye safety limits to be used for time-of-flight lidar applications without exceeding the eye safety limits.

7. 发明授权

US10495794B2 Polarization insensitive optical phased array and associated method 有权
公开(公告)号：US10495794B2
公开(公告)日：2019-12-03
申请号：US15838498
申请日：2017-12-12
申请人： Chunshu Zhang , Eric Bernier , Dominic John Goodwill
发明人： Chunshu Zhang , Eric Bernier , Dominic John Goodwill
IPC分类号： H04B15/00 , G02B5/18 , G02F1/29 , G01S17/10
CPC分类号： G02B5/1885 , G01S17/10 , G02F1/292 , H04B15/00 , G02F2203/07 , G02F2203/50
摘要： A polarization insensitive optical phased array is provided, for LIDAR or other purposes. A polarization rotator splitter or two-dimensional grating coupler provides two components of co-polarized (e.g. TE-polarized) light. Each component can be routed to a separate optical phased array (OPA) component, and light output of one of the OPA components is rotated in polarization by use of a half wave plate. A polarization controller can receive and control the two components of co-polarized light and then passes the controlled light to the two OPA components. A single OPA component can also be used along with a controller which combines the two components of co-polarized light into a single output, passed to the single OPA component.

8. 发明申请

US20190324201A1 OPTICAL TRANSPOSER ASSEMBLY 审中-公开
公开(公告)号：US20190324201A1
公开(公告)日：2019-10-24
申请号：US15957492
申请日：2018-04-19
申请人： Dritan CELO , Dominic John GOODWILL , Eric BERNIER
发明人： Dritan CELO , Dominic John GOODWILL , Eric BERNIER
IPC分类号： G02B6/12 , G02B6/30 , G02B6/122 , H01S5/50
摘要： An assembly with optical gain assisted optical transposer is provided. The optical transposer which optically couples a fibre array unit and a photonic integrated circuit. The optical transposer includes one or more optical gain elements which are configured to provide optical compensation, for example optical gain to mitigate optical losses associated with multistage photonic integrated devices. According to some embodiments, the optical gain element is a semiconductor optical amplifier (SOA). According to some embodiments the photonic integrated circuit is a SiPh PIC.

9. 发明申请

US20190293794A1 COHERENT LIDAR METHOD AND APPARATUS 审中-公开
公开(公告)号：US20190293794A1
公开(公告)日：2019-09-26
申请号：US15936240
申请日：2018-03-26
申请人： Chunshu ZHANG , Patrick DUMAIS , Dominic John GOODWILL
发明人： Chunshu ZHANG , Patrick DUMAIS , Dominic John GOODWILL
IPC分类号： G01S17/58 , G01S7/481 , G01S7/486
摘要： A coherent LIDAR method and apparatus are provided, in which two optical signals having a first frequency difference are reflected by an object. A difference in frequency between the corresponding received and reflected signals is determined. The frequency difference between the reflected signals differs from the first frequency difference due to Doppler effects. The object velocity is determined based on a comparison between the first frequency difference and the frequency difference in the reflected signals. The emitted signals can be produced by modulating a common light source. The reflected signals are inherently mixed at the receiver and further processed. Distance to the object can be determined by pulsing the emitted signals and measuring a time of flight by detecting corresponding pulse edges in the reflected signals, or by using phase sweeping. The emitter can be implemented using an optical phased array.

10. 发明授权

US10386582B2 Method and apparatus for obtaining optical measurements at an optical coupler having two inputs and two outputs 有权
公开(公告)号：US10386582B2
公开(公告)日：2019-08-20
申请号：US15251782
申请日：2016-08-30
申请人： Mohammad Mehdi Mansouri Rad , Dominic John Goodwill , Jia Jiang
发明人： Mohammad Mehdi Mansouri Rad , Dominic John Goodwill , Jia Jiang
IPC分类号： G02B6/12 , G02B6/35 , G02B6/27 , G02B6/28 , G02F1/01
摘要： A photonic device such as a polarization controller includes a coupler, such as a 2×2 MMI coupler, or a series of such couplers. Couplers may be interspersed with other components such as phase shifters. Photodetectors such as photodiodes are coupled to input and output lines of the coupler or couplers, for example via taps. In various embodiments, all of the couplers include photodetectors monitoring light power for at least two of their inputs and outputs, and at least one of the couplers includes photodetectors monitoring at least three of its inputs and outputs. The arrangement of photodetectors can provide sufficient information for feedback control of the photonic device and/or determining the state of polarization of light within the photonic device. Signals from some photodetectors can be used to estimate light power at locations in the photonic device lacking photodetectors.

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