公开(公告)号：US11190293B1

公开(公告)日：2021-11-30

申请号：US16929436

申请日：2020-07-15

Applicant: COM DEV Ltd.

Inventor： Thomas Ducellier

IPC: H04J14/06 ,  H04B10/61 ,  H04B10/532 ,  H04J14/02

Abstract: Various embodiments for an optical system are described herein. Generally, the optical system may include an optical transmitter coupled to an optical signal transmission path, an optical receiver coupled to an optical signal reception path, and an external signal path extending between an external optical assembly and both the optical signal transmission path and the optical signal reception path. An optical polarization division multiplexer may be provided to couple the optical signal transmission path and the optical signal reception path to the external signal path. A first non-reciprocal polarization rotator may be also positioned along the external signal path between the optical polarization division multiplexer and the external optical assembly. Further, a quarter wave plate may be positioned along the external signal path between the non-reciprocal polarization rotator and the external optical assembly.

公开(公告)号：US20220350083A1

公开(公告)日：2022-11-03

申请号：US17243359

申请日：2021-04-28

Applicant: COM DEV LTD.

Inventor： Thomas Ducellier

IPC: G02B6/293 ,  H04B10/40 ,  H04B10/112 ,  H04B10/118

Abstract: An optical communication system that includes terminals that operate with different, widely separated wavelengths in which a terminal in the system may be configured to function in both a first operational mode and in a second operational mode. For example, a terminal according to the techniques of this disclosure may communicate with full duplex communication by transmitting a first optical wavelength and receiving a second optical wavelength while in the first operational mode. The same terminal may be reconfigured to transmit the second optical wavelength and receive the first optical wavelength while in the second operational mode. In some examples, the terminal may be located in a spacecraft, such as an orbiting satellite or other vehicle, and may communicate with other terminals such as airborne terminals, terminals located at ground station on the Earth's surface, or with terminals located in other spacecraft.

公开(公告)号：US11411647B2

公开(公告)日：2022-08-09

申请号：US17157544

申请日：2021-01-25

Applicant: COM DEV LTD.

Inventor： Thomas Ducellier ,  Sheng Hai Zheng ,  Brian MacKay

IPC: H04B10/00 ,  H04B10/118 ,  G02B23/02 ,  H04B7/185 ,  B64G1/10

Abstract: An apparatus for optical pointing is disclosed. The apparatus comprises a telescope, a transmission prism rotatably coupled to the telescope, and a rotatable mechanism operatively coupled to the telescope. The transmission prism is configured to rotate around a first rotation axis, and the rotatable mechanism is configured to rotate around a second rotation axis that is different than the first rotation axis.

公开(公告)号：US11128373B1

公开(公告)日：2021-09-21

申请号：US16945112

申请日：2020-07-31

Applicant: COM DEV LTD.

Inventor： Hugh Podmore ,  Alan Scott ,  Thomas Ducellier

IPC: H04B10/00 ,  H04B10/112 ,  H04B10/516 ,  H04B10/564 ,  H04J14/00

Abstract: Various embodiments for a system and method for a range-enhanced high-speed free-space optical communication are described herein. Generally, the optical communication system may include a first modulator, a second modulator and an average-power limited optical amplifier. The first modulator may receive an input optical signal and generate a modulated optical signal. The second modulator may receive the modulated signal and may be operable to turn-off a select number of pulses in each modulated pulse frame of the modulated signal to generate a low-duty cycle modulated signal. The average-power limited optical amplifier may then generate an amplified modulated signal from the low-duty cycle signal, wherein the amplified modulated signal comprises a plurality of amplified pulse frames with each amplified pulse frame defining an amplified version of a corresponding each low-duty cycle pulse frame.

公开(公告)号：US20210242939A1

公开(公告)日：2021-08-05

申请号：US17157544

申请日：2021-01-25

Applicant: COM DEV LTD.

Inventor： Thomas Ducellier ,  Sheng Hai Zheng ,  Brian MacKay

IPC: H04B10/118 ,  H04B7/185 ,  G02B23/02

Abstract: An apparatus for optical pointing is disclosed. The apparatus comprises a telescope, a transmission prism rotatably coupled to the telescope, and a rotatable mechanism operatively coupled to the telescope. The transmission prism is configured to rotate around a first rotation axis, and the rotatable mechanism is configured to rotate around a second rotation axis that is different than the first rotation axis.

公开(公告)号：US11567264B2

公开(公告)日：2023-01-31

申请号：US17243359

申请日：2021-04-28

Applicant: COM DEV LTD.

Inventor： Thomas Ducellier

IPC: G02B6/293 ,  H04B10/40 ,  H04B10/118 ,  H04B10/112

Abstract: An optical communication system that includes terminals that operate with different, widely separated wavelengths in which a terminal in the system may be configured to function in both a first operational mode and in a second operational mode. For example, a terminal according to the techniques of this disclosure may communicate with full duplex communication by transmitting a first optical wavelength and receiving a second optical wavelength while in the first operational mode. The same terminal may be reconfigured to transmit the second optical wavelength and receive the first optical wavelength while in the second operational mode. In some examples, the terminal may be located in a spacecraft, such as an orbiting satellite or other vehicle, and may communicate with other terminals such as airborne terminals, terminals located at ground station on the Earth's surface, or with terminals located in other spacecraft.

公开(公告)号：US20210263293A1

公开(公告)日：2021-08-26

申请号：US16881338

申请日：2020-05-22

Applicant: COM DEV Ltd.

Inventor： Thomas Ducellier ,  Alexander Beaton ,  Sheng Hai Zheng

IPC: G02B19/00 ,  H04B10/50

Abstract: An optical system includes a plurality of internal apertures, a plurality of external optical assemblies and a telescope assembly positioned between the plurality of internal apertures and the plurality of external optical assemblies. Each internal aperture is operable to receive a corresponding aperture-specific optical signal. Each external optical assembly corresponds to one of the internal apertures, and each external optical assembly is operable to direct the aperture-specific optical signal of the corresponding internal aperture in a corresponding external direction. The external direction for each external optical assembly is independently controllable and the telescope assembly defines a shared optical train arranged to direct the aperture-specific optical signals between each internal aperture and the corresponding external optical assembly.