Localization of an anomaly in an optical transmission system
In an example, a method may include a first optical signal and a second optical signal being obtained by a receiving device. The first optical signal may include a first wavelength and the second optical signal may include a second wavelength. The method may also include obtaining a determination that a dynamic anomaly may be present in the transmission medium. In response to the determination that a dynamic anomaly is present in the transmission medium, a relationship between the first optical signal and the second optical signal may be determined to obtain a time delay. The method may include using the time delay, the first wavelength, and the second wavelength to determine an anomaly location in the transmission medium.
1. A method comprising:
obtaining, by a receiving device, a first optical signal and a second optical signal propagating in a transmission medium, the first optical signal including a first wavelength, the second optical signal including a second wavelength;
obtaining a determination that an anomaly is present in the transmission medium; in response to the determination that the anomaly is present in the transmission medium, determining a relationship between the first optical signal and the second optical signal using a cross-correlation to obtain a time delay, wherein the cross-correlation comprises an integral of a first monitored power associated with the first optical signal multiplied by a second monitored power associated with the second optical signal as the second optical signal is shifted in time; and
determining an anomaly location in the transmission medium using the time delay, the first wavelength, and the second wavelength.
2. The method of claim 1 , further comprising:
obtaining a first received power of the first optical signal at the receiving device;
obtaining a second received power of the second optical signal at the receiving device; and
determining a presence of the anomaly in the transmission medium by comparing the first received power with a first expected power of the first optical signal and comparing the second received power with a second expected power of the second optical signal.
3. The method of claim 1 , wherein the transmission medium includes a dispersion factor, and the anomaly location is determined using the dispersion factor.
4. The method of claim 1 , wherein the anomaly comprises a micro-bend in the transmission medium.
5. The method of claim 1 , wherein the first wavelength is included in a first wavelength range and the second wavelength is included in a second wavelength range that does not overlap the first wavelength range.
6. The method of claim 1 , wherein the first optical signal includes encoded data, and the second optical signal includes shaped amplified spontaneous emission (ASE) noise.
7. The method of claim 1 , wherein the first optical signal and the second optical signal are multiplexed into a single transmission in the transmission medium.
8. The method of claim 1 , further comprising determining a difference between the first wavelength and the second wavelength, wherein the anomaly location is further determined based on the difference.
9. The method of claim 1 , further comprising in response to determining the anomaly location, automatically transmitting the anomaly location to a user device.
10. A system comprising:
one or more computer-readable storage media configured to store instructions; and
one or more processors communicatively coupled to the one or more computer-readable storage media and configured to, in response to execution of the instructions, cause the system to perform operations, the operations comprising:
obtaining, by a receiving device, a first optical signal and a second optical signal propagating in a transmission medium, the first optical signal including a first wavelength, the second optical signal including a second wavelength;
obtaining a determination that an anomaly is present in the transmission medium;
in response to the determination that the anomaly is present in the transmission medium, determining a relationship between the first optical signal and the second optical signal using a cross-correlation to obtain a time delay, wherein the cross-correlation comprises an integral of a first monitored power associated with the first optical signal multiplied by a second monitored power associated with the second optical signal as the second optical signal is shifted in time; and
determining an anomaly location in the transmission medium using the time delay, the first wavelength, and the second wavelength.
11. The system of claim 10 , further comprising:
obtaining a first received power of the first optical signal at the receiving device;
obtaining a second received power of the second optical signal at the receiving device; and
determining a presence of the anomaly in the transmission medium by comparing the first received power with a first expected power of the first optical signal and comparing the second received power with a second expected power of the second optical signal.
12. The system of claim 10 , wherein the transmission medium includes a dispersion factor, and the anomaly location is determined using the dispersion factor.
13. The system of claim 10 , wherein the anomaly comprises a micro-bend in the transmission medium.
14. The system of claim 10 , wherein the first wavelength is included in a first wavelength range and the second wavelength is included in a second wavelength range that does not overlap the first wavelength range.
15. The system of claim 10 , wherein the first optical signal includes encoded data, and the second optical signal includes shaped ASE noise.
16. The system of claim 10 , wherein the first optical signal and the second optical signal are multiplexed into a single transmission in the transmission medium.
17. The system of claim 10 , further comprising determining a difference between the first wavelength and the second wavelength, wherein the anomaly location is further determined based on the difference.
18. The method of claim 1 , wherein the anomaly is a dynamic anomaly.
19. The method of claim 3 , wherein the anomaly location is determined by dividing the time delay by a multiple of the dispersion factor with the difference between the first wavelength and the second wavelength.
20. The method of claim 5 , wherein the first wavelength is an L-band wavelength and the second wavelength is a C-band wavelength.