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.