公开(公告)号：US20190021087A1

公开(公告)日：2019-01-17

申请号：US16020357

申请日：2018-06-27

Applicant: X Development LLC

Inventor： Chiachi Wang ,  Sheng-Hui Yang ,  Romain Clement ,  Michael Sholl

IPC: H04W72/04 ,  H04B10/112 ,  H04B7/185

Abstract: A method includes receiving a first optical signal at a first communication terminal from a second communication terminal through a free space optical link. The received optical signal contains a modulated unique frequency tone. The method also includes mixing the modulated unique frequency tone with a reference signal to provide a mixed output signal and determining a signal strength of the modulated unique frequency tone based on the mixed output signal. The reference signal includes a same frequency as the modulated unique frequency tone. The method adjusts an optical head of the first communication terminal to establish acquisition and optical beam pointing with the second communication terminal based on the signal strength of the modulated unique frequency tone received from the second communication terminal.

公开(公告)号：US20180375575A1

公开(公告)日：2018-12-27

申请号：US16055801

申请日：2018-08-06

Applicant: X Development LLC

Inventor： Chiachi Wang

IPC: H04B10/11 ,  H04J14/02 ,  H04B10/112 ,  H04B10/2581 ,  H04B10/25

Abstract: A free space optical communication system transmits and receives optical signals in a colorless manner using an optical circulator. The system installs the optical circulator with a single mode (SM) fiber at port 1, a double clad (DC) fiber at port 2, and a multimode (MM) fiber at port 3. The system injects a first optical signal into a core of the SM fiber. The system then routes the first optical signal at port 1, using the optical circulator, into a SM core of the DC fiber via Port 2. Further, the system injects a second optical signal into a first cladding of the DC fiber. The system then routes the second optical signal at port 2, using the optical circulator, into the MM fiber via Port 3.