System and method for transmissions using eliptical core fibers

• US 10,168,501 B2
• Filed: 05/30/2017
• Issued: 01/01/2019
• Est. Priority Date: 05/27/2016
• Status: Active Grant

• Current Assignee: Nxgen Partners Ip, LLC (NxGen Partners LLC)
• Original Assignee: Nxgen Partners Ip, LLC (NxGen Partners LLC)
• Inventors: Ashrafi, Solyman
• Primary Examiner(s): Liu, Li
• Application Number:
  US15/608,609
• Publication Number:
  US 20170343750A1
• Time in Patent Office: 581 Days
• Field of Search: None
• CPC Class Codes: G01M 11/085 the optical fiber being on or near the surface of the DUT
• CPC Class Codes: G02B 6/02042 Multicore optical fibres
• CPC Class Codes: G02B 6/024 with polarisation maintaining properties
• CPC Class Codes: G02B 6/14 Mode converters
• CPC Class Codes: G02B 6/262 Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
• CPC Class Codes: G02B 6/2726 in or on light guides, e.g. polarisation means assembled in a light guide
• CPC Class Codes: G02B 6/4246 Bidirectionally operating package structures
• CPC Class Codes: G02B 6/43 Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
• CPC Class Codes: H04B 10/25 Arrangements specific to fibre transmission
• CPC Class Codes: H04B 10/2507 for the reduction or elimination of distortion or dispersion
• CPC Class Codes: H04B 10/516 Details of coding or modulation
• CPC Class Codes: H04B 10/60 Receivers
• CPC Class Codes: H04J 14/02 Wavelength-division multiplex systems
• CPC Class Codes: H04J 14/04 Mode multiplex systems
• CPC Class Codes: H04J 14/06 Polarisation multiplex systems
• CPC Class Codes: H05K 999/99 dummy group

Abstract

A system for transmission of optical data signals has first optical processing circuitry for receiving a plurality of digital signals and applying at least one of a Hermite-Gaussian function, a Laguerre-Gaussian function or an Ince-Gaussian function to each of the received plurality of digital signals. The first optical processing circuitry also combines each of the at least one of the Hermite-Gaussian function, the Laguerre-Gaussian function or the Ince-Gaussian function applied plurality of digital signals into a single carrier signal. An optical transmitter transmits the single carrier signal. An optical receiver receives the transmitted single carrier signal. Second optical processing circuitry separates the at least one of the Hermite-Gaussian function, the Laguerre-Gaussian function or the Ince-Gaussian function applied digital signals of the single carries signal into separate signals and removes the at least one of the Hermite-Gaussian function, the Laguerre-Gaussian function or the Ince-Gaussian function applied to each of the plurality of digital signals. An elliptical core fiber transmits the single carrier signal from the optical transmitter to the optical receiver. The elliptical core fiber includes an elliptical core have a major axis and a minor axis.

Claims

1. A system for transmission of optical data signals, comprising:

first optical processing circuitry for receiving a plurality of digital signals and applying an Ince-Gaussian function to each of the received plurality of digital signals and combining the Ince-Gaussian function applied plurality of digital signals into a single carrier signal;

an optical transmitter for transmitting the single carrier signal;

an optical receiver for receiving the transmitted single carrier signal;

second optical processing circuitry for separating the Ince-Gaussian function applied plurality of digital signals of the single carries signal into separate signals and for removing the Ince-Gaussian function applied to each of the plurality of digital signals; and

an elliptical core fiber for transmitting the single carrier signal from the optical transmitter to the optical receiver, the elliptical core fiber including an elliptical core have a major axis and a minor axis, wherein the elliptical core fiber enables the Ince-Gaussian function applied digital signals to propagate further before coupling together within the elliptical core fiber.

2. The system of claim 1, wherein the elliptical core fiber further comprises a first stress rod located above the major axis along the minor axis and a second stress rod located below the major axis along the minor axis.

3. The system of claim 1, wherein the first optical processing circuitry further comprises a spatial light modulator for generating and applying the Ince-Gaussian function to each of the plurality of digital signals.

4. The system of claim 1, wherein the second optical processing circuitry further comprises a second spatial light modulator for imprinting an inverse phase front of each received mode component on each of the received mode components within the received single carrier signal to generate the single carrier signal having a planar phase front for each of the received mode components within the single carrier signal.

5. The system of claim 4 further including a spatial filter for filtering the single carrier signal from the second spatial light modulator, wherein the spatial filter passes plane wave components of the of the single carrier signal and blocks other output mode components of the single carrier signal.

6. The system of claim 5, wherein the second optical processing circuitry further measures a power output of each mode component from the spatial filter.

7. The system of claim 6, wherein the measured power output of each mode component is used to populate a mode crosstalk matrix.

8. The system of claim 1, wherein the optical transmitter launches the single carrier signal into the elliptical core fiber.

9. The system of claim 1, wherein the Ince-Gaussian function comprises the Ince-Gaussian function.

10. The system of claim 1, wherein the first optical processing circuitry further combines each of the Ince-Gaussian function applied plurality of digital signals into the single carrier signal using at least one of wavelength division multiplexing or dense wavelength division multiplexing.

11. The system of claim 1, wherein the first optical processing circuitry further combines each of the Ince-Gaussian function applied plurality of digital signals into the single carrier signal using a combination of polarization multiplexing, wavelength division multiplexing and mode division multiplexing.

12. A method for transmission of optical data signals, comprising:

receiving a plurality of digital signals;

applying an Ince-Gaussian function to each of the received plurality of digital signals;

combining each of the Ince-Gaussian function applied plurality of digital signals into a single carrier signal;

transmitting the single carrier signal over an elliptical core fiber, the elliptical core fiber including an elliptical core have a major axis and a minor axis;

receiving the transmitted single carrier signal over the elliptical core fiber;

separating the Ince-Gaussian function applied plurality of digital signals of the single carrier signal into separate signals; and

removing the Ince-Gaussian function applied to each of the plurality of digital signals.

13. The method of claim 12, wherein the step of transmitting further comprises transmitting the single carrier signal over an elliptical core fiber comprising a first stress rod located above the major axis of a core of the elliptical core fiber along the minor axis of the core of the elliptical core fiber and a second stress rod located below the major axis of the elliptical core fiber along the minor axis of the elliptical core fiber.

14. The method of claim 12 wherein the step of applying further comprises generating and applying the Ince-Gaussian function to each of the plurality of digital signals using a spatial light modulator.

15. The method of claim 12, wherein the step of removing further comprises imprinting an inverse phase front of each received mode component on each of the received mode components within the received single carrier signal to generate the single carrier signal having a planar phase front for each of the received mode components within the single carrier signal using a second spatial light modulator.

16. The method of claim 15 further including filtering the single carrier signal from the second spatial light modulator using a spatial filter.

17. The method of claim 16 wherein the step of filtering further comprises:

passing plane wave components of the of the single carrier signal; and

blocking other output mode components of the single carrier signal.

18. The method of claim 17 further comprising measuring a power output of each mode component passed from the spatial filter.

19. The method of claim 18 further including the step of populating a mode crosstalk matrix with the measured power output of each mode component.

20. The method of claim 12, wherein the step of transmitting further comprises launching the single carrier signal into the elliptical core fiber.

21. The method of claim 12, wherein the Ince-Gaussian function comprises the Ince-Gaussian function.

22. The method of claim 12, wherein the step of combining further comprises combining each of the Ince-Gaussian function applied plurality of digital signals into the single carrier signal using at least one of wavelength division multiplexing or dense wavelength division multiplexing.

23. The method of claim 12, wherein the step of combining further comprises combining each of the Ince-Gaussian function applied plurality of digital signals into the single carrier signal using a combination of polarization multiplexing, wavelength division multiplexing and mode division multiplexing.

24. A system for transmission of optical data signals, comprising:

first optical processing circuitry for receiving a plurality of digital signals and applying an Ince-Gaussian function to each of the received plurality of digital signals and combining the Ince-Gaussian function applied plurality of digital signals into a single carrier signal, wherein the first optical processing circuitry further comprises a spatial light modulator for generating and applying or the Ince-Gaussian function to each of the plurality of digital signals;

an optical transmitter for transmitting the single carrier signal;

an optical receiver for receiving the transmitted single carrier signal;

second optical processing circuitry for separating the Ince-Gaussian function applied plurality of digital signals of the single carries signal into separate signals and for removing the Ince-Gaussian function applied to each of the plurality of digital signals, wherein the second optical processing circuitry further comprises a second spatial light modulator for imprinting an inverse phase front of each received mode component on each of the received mode components within the received single carrier signal to generate the single carrier signal having a planar phase front for each of the received mode components within the single carrier signal; and

an elliptical core fiber for transmitting the single carrier signal from the optical transmitter to the optical receiver, the elliptical core fiber including an elliptical core have a major axis and a minor axis, wherein the elliptical core fiber further comprises a first stress rod located above the major axis along the minor axis and a second stress rod located below the major axis along the minor axis further wherein the elliptical core fiber enables the Ince-Gaussian function applied digital signals to propagate further before coupling together within the elliptical core fiber.

25. The system of claim 24 further including a spatial filter for filtering the single carrier signal from the second spatial light modulator, wherein the spatial filter passes plane wave components of the of the single carrier signal and blocks other output mode components of the single carrier signal.

26. The system of claim 25, wherein the second optical processing circuitry further measures a power output of each mode component from the spatial filter.

27. The system of claim 26, wherein the measured power output of each mode component is used to populate a mode crosstalk matrix.

28. The system of claim 27, wherein the optical transmitter launches the single carrier signal into the elliptical core fiber.

29. The system of claim 24, wherein the first optical processing circuitry further combines each of the Ince-Gaussian function applied plurality of digital signals into the single carrier signal using at least one of wavelength division multiplexing or dense wavelength division multiplexing.

30. The system of claim 24, wherein the first optical processing circuitry further combines each of the Ince-Gaussian function applied plurality of digital signals into the single carrier signal using a combination of polarization multiplexing, wavelength division multiplexing and mode division multiplexing.