M-ARY frequency presence modulation communication system and method

Patent metadata

Field	Value
Publication number	US-10050715-B1
Application number	US-201715845379-A
Country	US
Kind code	B1
Filing date	Dec 18, 2017
Priority date	Dec 18, 2017
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

An optical communication system includes a data transmitter. The data transmitter includes at least one optical emission device to output light energy as an optical beam having an operating bandwidth; a beam dividing device arranged to divide the operating bandwidth of the optical beam into bandwidth portions of plural communication bands; an array of graphene switches to: spectrally segregate a bandwidth portion of at least one communication band into plural channels by adjusting at least one graphene switch, and modulate the bandwidth portion to selectively produce an optical output signal with wavelengths that correspond to one or more of the channels, wherein a presence and absence of energy within channels of the communication band will constitute an information packet for data communication. The system includes a focusing grating to receive and focus a first set of wavelengths of the optical output signal reflected by the array of graphene switches.

First claim

What is claimed is:

1. An optical communication system, comprising:
a data transmitter including:
at least one optical emission device configured to output light energy as an optical beam having an operating bandwidth;
a beam dividing device arranged to receive and divide the operating bandwidth of the optical beam into bandwidth portions of plural communication bands;
an array of graphene switches configured to:
spectrally segregate a bandwidth portion of at least one communication band into plural channels by adjusting at least one graphene switch in the array, and
modulate the bandwidth portion to selectively produce an optical output signal with wavelengths that correspond to one or more of the channels, wherein a presence and absence of energy within channels of the communication band will constitute an information packet for data communication; and

a focusing grating configured to receive and focus a first set of wavelengths of the optical output signal reflected by the array of graphene switches, wherein the first set of wavelengths is outputted to a telescope for transmission.

2. The optical communication system of claim 1 , comprising:
a detector configured to receive a second set of wavelengths from the array of graphene switches and convert the second set of wavelengths into electrical current, wherein the second set of wavelengths received by the detector is not transmitted by the telescope and is used for data verification.

3. The optical communication system of claim 1 , comprising:
a pin diode array configured to receive a second set of wavelengths from the array of graphene switches and convert the second set of wavelengths into electrical current, wherein the second set of wavelengths received by the pin diode array is not transmitted by the telescope and is used for data verification.

4. The optical communication system of claim 1 , comprising:
at least one Geiger-mode avalanche photodiode configured to receive a second set of wavelengths from the array of graphene switches and convert the second set of wavelengths into electrical current, wherein the second set of wavelengths received by the at least one Geiger-mode avalanche photodiode is not transmitted by the telescope and is used for data verification.

5. The optical communication system of claim 4 , wherein the at least one Geiger-mode avalanche photodiode is an array of Geiger-mode avalanche photodiodes.

6. The optical communication system of claim 1 , comprising:
a frequency presence modulation unit that includes the array of graphene switches and the focusing grating.

7. The optical communication system of claim 4 , comprising:
a frequency presence modulation unit that includes the array of graphene switches, the focusing grating, and the at least one Geiger-mode avalanche photodiode.

8. The optical communication system of claim 7 , comprising:
a controller for providing a control signal to the frequency presence modulation unit to spectrally segregate the bandwidth portion of the at least one communication band into the plural channels,
wherein the telescope transmits the optical output signal.

9. The optical communication system of claim 7 , wherein the frequency presence modulation unit comprises:
plural beam adjustment components that adjust the orientation of an input beam from the beam dividing device, and output an adjusted beam;
a grating that receives the adjusted beam from the plural beam adjustment components, disperses the spectral content of the adjusted beam, and redirects the dispersed spectral content; and
a focusing mirror that receives the dispersed spectral content from the grating and focuses the dispersed spectral content onto the array of graphene switches.

10. A transceiver comprising the data transmitter of claim 1 and a data receiver.

11. An optical communication system, comprising:
a data transmitter including:
at least one optical emission device configured to output light energy as an optical beam having an operating bandwidth;
a beam dividing device arranged to receive and divide the operating bandwidth of the optical beam into bandwidth portions of plural communication bands; and
an array of graphene switches configured to:
spectrally segregate a bandwidth portion of at least one communication band into plural channels, and
modulate the bandwidth portion to selectively produce an optical output signal with wavelengths that correspond to one or more of the channels, wherein a presence and absence of energy within channels of the communication band will constitute an information packet for data communication;

a focusing grating configured to receive and focus a first set of wavelengths of the optical output signal reflected by the array of graphene switches, wherein the first set of wavelengths is outputted to a telescope for transmission; and
at least one Geiger-mode avalanche photodiode configured to receive a second set of wavelengths from the array of graphene switches and convert the second set of wavelengths into electrical current, wherein the second set of wavelengths received by the at least one Geiger-mode avalanche photodiode is not transmitted by the telescope and is used for data verification.

12. The optical communication system of claim 11 , wherein the at least one Geiger-mode avalanche photodiode is an array of Geiger-mode avalanche photodiodes.

13. The optical communication system of claim 11 , comprising:
a frequency presence modulation unit that includes the array of graphene switches, the focusing grating, and the at least one Geiger-mode avalanche photodiode.

14. A transceiver comprising the data transmitter of claim 11 and a data receiver.

15. A method for optical communication, the method comprising:
outputting, by at least one optical emission device, light energy as an optical beam having an operating bandwidth on to a beam dividing device;
dividing, by the beam dividing device, the operating bandwidth of the optical beam into bandwidth portions of plural communication bands;
spectrally segregating, an array of graphene switches, a bandwidth portion of at least one communication band into plural channels by adjusting at least one graphene switch in the array of graphene switches;
modulating, by the array of graphene switches, the bandwidth portion to selectively produce an optical output signal with wavelengths that correspond to one or more of the channels, wherein a presence and absence of energy within channels of the communication band will constitute an information packet for data communication;
receiving, on a focusing grating, a first set of wavelengths of the optical output signal reflected by the array of graphene switches and focusing the first set of wavelengths by the focusing grating; and
outputting the first set of wavelengths to a telescope for transmission.

16. The method of claim 15 , comprising:
transmitting, by the telescope, the optical output signal to a data receiver.

17. The method of claim 15 , comprising:
receiving, on a detector, a second set of wavelengths from the array of graphene switches and converting the second set of wavelengths into electrical current, wherein the second set of wavelengths received by the detector is not transmitted by the telescope and is used for data verification.

18. The method of claim 15 , comprising:
receiving, on a pin diode array, a second set of wavelengths from the array of graphene switches and converting the second set of wavelengths into electrical current, wherein the second set of wavelengths received by

Assignees

• Booz Allen Hamilton Inc

Inventors

• Blanks Keith A
• Aspiotis Jason

Classifications

• H04B10/572

  Wavelength control · CPC title

• G01J3/0224

  using polarising or depolarising elements · CPC title

• H04B10/5563 Primary

  Digital frequency modulation · CPC title

• G01J2001/4466

  Avalanche · CPC title

• H01S3/10

  Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating · CPC title