Communication device

Patent metadata

Field	Value
Publication number	US-10020883-B1
Application number	US-201715631244-A
Country	US
Kind code	B1
Filing date	Jun 23, 2017
Priority date	May 5, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A communication system includes a transparent refractive optical wedge, a steerable mirror, a position feedback device, and a transceiver. The transparent refractive optical wedge has first and second faces angled with respect to each other and receives first and second optical signals through both the first and second faces. The first and second optical signals travel along parallel or common paths through the first face and diverge at a deflection angle with respect to each other through the second face. The steerable mirror is in optical communication with the first face of the optical wedge, the position feedback device, and the transceiver. The position feedback device adjusts a position of the steerable mirror to maintain the alignment of the reflected signal with the position feedback device. The transceiver has an optical transmitter transmitting one of the optical signals and an optical receiver receiving the other optical signal.

First claim

What is claimed is:

1. A communication system of a first communication device, the communication system comprising:
an optical wedge having a first face and a second face, configured to receive a first optical signal through the optical wedge from the first face to the second face for transmission to a second communication device and a second optical signal transmitted from the second communication device through the optical wedge from the second face to the first face, the first face and the second face arranged so that:
the first optical signal exiting the second face of the optical wedge travels along a first path away from the second face of the optical wedge and toward the second communication device at a deflection angle with respect to a second path of the second optical signal travelling toward the second face of the optical wedge from the second communication device, wherein the first optical signal exiting the second face of the optical wedge deflects before the second optical signal passes through the optical wedge; and
the second optical signal exiting the first face of the optical wedge travels along a parallel or common path with respect to the first optical signal traveling toward the first face of the optical wedge; and

a mirror arranged relative to the optical wedge so that the first optical signal and the second optical signal travel along the parallel or common path between the mirror and the first face of the optical wedge.

2. The communication system of claim 1 , further comprising a transceiver arranged for optical communication with the mirror, wherein the parallel or common path for the first optical signal and the second optical signal extends between the mirror and the first face of the optical wedge and between the mirror and the transceiver.

3. The communication system of claim 1 , wherein the optical wedge has a refractive angle on both sides of up to about 20 degrees.

4. The communication system of claim 1 , wherein the deflection angle equals between 0 degrees and about 0.1 degrees.

5. The communication system of claim 1 , wherein the optical wedge comprises a fused silica wedge and the first face and the second face are angled with respect to each other by an angle of between about 12 degrees and about 16 degrees.

6. The communication system of claim 1 , wherein the optical wedge has an incidence angle on both surfaces of up to about 20 degrees.

7. The communication system of claim 1 , further comprising:
a position feedback device configured to sense an alignment of the second optical signal reflecting off the mirror and adjusting a position of the mirror to maintain the alignment of the reflected second optical signal; and
a signal splitter in optical communication with the mirror and a transceiver, the signal sputter arranged to split one of the first optical signal or the second optical signal travelling from the mirror to the signal splitter and direct a portion of the split signal to the position feedback device and direct a remaining portion of the split signal to the transceiver.

8. The communication system of claim 7 , further comprising an optical lens arranged to focus the portion of the split signal travelling from the signal splitter to the position feedback device.

9. The communication system of claim 7 , further comprising an optical lens arranged to focus optical signals travelling between the signal sputter and the transceiver.

10. The communication system of claim 9 , further comprising an optical fiber in optical communication with the transceiver, the optical lens directing the optical signals between a tip of the optical fiber and the signal splitter.

11. A method comprising:
receiving a first optical signal and a second optical signal through an optical wedge having a first face and a second face, the first optical signal received through the optical wedge from the first face to the second face for transmission to a communication device and the second optical signal transmitted by the communication device received through the optical wedge from the second face to the first face, the first face and the second arranged so that:
the first optical signal exiting the second face of the optical wedge travels along a first path away from the second face of the optical wedge and toward the communication device at a deflection angle with respect to a second path of the second optical signal travelling toward the second face of the optical wedge from the communication device, wherein the first optical signal exiting the second face of the optical wedge deflects before the second optical signal passes through the optical wedge; and
the second optical signal exiting the first face of the optical wedge travels along a parallel or common path with respect to the first optical signal traveling toward the first face of the optical wedge; and

directing the first optical signal and the second optical signal along the parallel or common paths relative to the first face of the optical wedge.

12. The method of claim 11 , wherein the optical wedge has a refractive angle on both sides of up to about 20 degrees.

13. The method of claim 11 , further comprising:
directing the first optical signal through an optical fiber optically coupled to a transmitter and to a signal splitter in optical communication with the optical fiber;
arranging the signal splitter to direct the first optical signal onto a steerable mirror in optical communication with the signal splitter and the first face of the optical wedge; and
arranging the steerable mirror to direct the first optical signal onto the first face of the optical wedge.

14. The method of claim 11 , further comprising:
arranging a steerable mirror to receive the second optical signal through the optical wedge and reflect the second optical signal to a signal splitter in optical communication with the steerable mirror; and
arranging the signal splitter to split the second optical signal travelling from the steerable mirror to the signal splitter and direct a portion of the split signal to a position feedback device and a remaining portion of the split signal to a transceiver.

15. The method of claim 14 , further comprising arranging the signal splitter to direct the remaining portion of the split signal into an optical fiber optically coupled to the transceiver.

16. The method of claim 14 , further comprising focusing the portion of the split signal travelling from the signal splitter to the position feedback device.

17. The method of claim 11 , further comprising:
adjusting a position of a steerable mirror in optical communication with the first face of the optical wedge to reflect the second optical signal received through the optical wedge onto a position feedback device;
sensing, using the position feedback device, an alignment of the reflected second optical signal with the position feedback device; and
readjusting the position of the steerable mirror based on the sensed alignment to maintain the alignment of the second optical signal with the position feedback device.

18. The method of claim 17 , wherein the deflection angle equals between 0 degrees and about 0.1 degrees.

19. The method of claim 17 , wherein the optical wedge comprises a fused silica wedge and the first face and the second face are angled with respect to each other by an angle of between about 12 degrees and about 16 degrees.

20. The method of claim 17 , wherein the optical wedge has an incidence angle on both surfaces of up to about 20 degrees.

Assignees

• X Dev Llc

Inventors

• Ni Melvin Sze-ming
• Wang Chiachi

Classifications

• H04B7/18513

  Transmission in a satellite or space-based system · CPC title

• H04B10/118 Primary

  specially adapted for satellite communication · CPC title

• H04B10/1129 Primary

  Arrangements for outdoor wireless networking of information · CPC title

• H04B10/1127

  using two distinct parallel optical paths · CPC title

• H04B10/1125

  using a single common optical path · CPC title