公开(公告)号：US11841599B2

公开(公告)日：2023-12-12

申请号：US17451711

申请日：2021-10-21

Applicant: McMaster University

Inventor： Chang-qing Xu ,  Liam Flannigan ,  Joshua Kneller

IPC: G02F1/39 ,  G02F1/35 ,  H01S3/109 ,  H01S3/108

CPC classification number: G02F1/39 ,  G02F1/3534 ,  G02F1/3548 ,  H01S3/109 ,  H01S3/1083

Abstract: Optical transmitters and optical receivers utilizing long wave infrared light for use with an earth-orbiting satellite communication system, and a structure including an intracavity optical nonlinear process, are described herein. The transmitters include a pumping laser diode with a fast-axis collimating lens and a pumping wavelength λ0, operating in a continuous wavelength (CW) mode. The transmitters also include a laser cavity having a beam combiner or a dichroic mirror, a laser crystal with a lasing wavelength λ1 and a difference frequency generation orientation patterned semiconductor to generate long wave-IR light. The transmitters also include a second laser at a wavelength λ2, operating in a modulation mode. The receivers have a similar structure to the transmitters, utilizing a sum frequency generation orientation patterned semiconductor to convert long wave-IR light into the short wave-IR.

公开(公告)号：US20210141282A1

公开(公告)日：2021-05-13

申请号：US17091362

申请日：2020-11-06

Applicant: McMaster University

Inventor： Chang-qing Xu ,  Joshua Kneller ,  Liam Flannigan

IPC: G02F1/35 ,  H01S5/00 ,  G02B27/14 ,  H04B10/50 ,  H04B10/60

Abstract: A difference frequency generation optical transmitter and sum frequency generation optical receiver operating in the mid-infrared wavelength range for use in free space optical satellite communications are described. By using mid-infrared light, the transmitter/receiver can mitigate atmospheric scintillation, scattering, and other non-ideal optical effects in the communication channel. This is achieved through the use of nonlinear optical crystals designed for difference frequency generation in the case of the transmitter and sum frequency generation for the receiver. High-speed modulated communication signals can thus be frequency converted to the mid-infrared wavelength range by a relatively low cost, compact and high-power optical communication system.

公开(公告)号：US20230128226A1

公开(公告)日：2023-04-27

申请号：US17971042

申请日：2022-10-21

Applicant: McMaster University

Inventor： Chang-qing Xu ,  Liam Flannigan ,  Joshua Kneller

IPC: H01S5/06 ,  H01S5/00 ,  H01S5/028 ,  H01S5/04 ,  H01S5/042 ,  H01S5/183

Abstract: A narrow linewidth mid infrared laser, including a pumping laser diode with a fast-axis compressor and a pumping wavelength λo; and an optical resonator arranged to receive the pumping wavelength λo, the optical resonator including a laser crystal with a lasing wavelength λp, a dichroic mirror, and a nonlinear crystal to generate an idler wavelength λi.

公开(公告)号：US11815783B2

公开(公告)日：2023-11-14

申请号：US17091362

申请日：2020-11-06

Applicant: McMaster University

Inventor： Chang-qing Xu ,  Joshua Kneller ,  Liam Flannigan

IPC: G02F1/35 ,  H01S5/00 ,  H01S3/108 ,  G02B1/11 ,  G02B27/14 ,  H04B10/118

CPC classification number: G02F1/3534 ,  H01S3/1083 ,  H01S5/0092 ,  G02B1/11 ,  G02B27/141 ,  H04B10/118

Abstract: A difference frequency generation optical transmitter and sum frequency generation optical receiver operating in the mid-infrared wavelength range for use in free space optical satellite communications are described. By using mid-infrared light, the transmitter/receiver can mitigate atmospheric scintillation, scattering, and other non-ideal optical effects in the communication channel. This is achieved through the use of nonlinear optical crystals designed for difference frequency generation in the case of the transmitter and sum frequency generation for the receiver. High-speed modulated communication signals can thus be frequency converted to the mid-infrared wavelength range by a relatively low cost, compact and high-power optical communication system.

公开(公告)号：US20220197109A1

公开(公告)日：2022-06-23

申请号：US17451711

申请日：2021-10-21

Applicant: McMaster University

Inventor： Chang-qing Xu ,  Lima Flannigan ,  Joshua Kneller

IPC: G02F1/39 ,  G02F1/35 ,  H01S3/109 ,  H01S3/06 ,  H01S3/23 ,  H01S3/0941 ,  H01S3/00 ,  H04B10/50

Abstract: Optical transmitters and optical receivers utilizing long wave infrared light for use with an earth-orbiting satellite communication system, and a structure including an intracavity optical nonlinear process, are described herein. The transmitters include a pumping laser diode with a fast-axis collimating lens and a pumping wavelength λ0, operating in a continuous wavelength (CW) mode. The transmitters also include a laser cavity having a beam combiner or a dichroic mirror, a laser crystal with a lasing wavelength λ1 and a difference frequency generation orientation patterned semiconductor to generate long wave-IR light. The transmitters also include a second laser at a wavelength λ2, operating in a modulation mode. The receivers have a similar structure to the transmitters, utilizing a sum frequency generation orientation patterned semiconductor to convert long wave-IR light into the short wave-IR.