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CN-122027013-A - Measurement method, measurement device and optical fiber communication system

CN122027013ACN 122027013 ACN122027013 ACN 122027013ACN-122027013-A

Abstract

The embodiment of the application provides a measuring method, a measuring device and an optical fiber communication system, which can realize the measurement of a plurality of different modes of a measured optical fiber under the condition of reducing the structural complexity. The method comprises the steps of modulating a first electric signal and a first pulse signal on a first optical signal by a measuring device to obtain first pulse light, modulating a second electric signal and a second pulse signal on a second optical signal by the measuring device to obtain second pulse light, wherein the correlation of the first electric signal on two adjacent periods is larger than that of the second electric signal on two adjacent periods, and inputting the first pulse light and the second pulse light into an optical fiber by the measuring device, wherein the first pulse light and the second pulse light are respectively used for measuring different modes of the optical fiber.

Inventors

  • ZHAO YAN
  • SONG JIAJUN
  • ZHANG KAI

Assignees

  • 华为技术有限公司

Dates

Publication Date
20260512
Application Date
20241112

Claims (20)

  1. 1. A measurement method, characterized in that the method is applied to a measurement device, the method comprising: The measuring device modulates a first electric signal and a first pulse signal on a first optical signal to obtain first pulse light; The measuring device modulates a second electric signal and a second pulse signal on a second optical signal to obtain second pulse light, the correlation of the first electric signal on two adjacent periods is larger than that of the second electric signal on two adjacent periods, the modulation mode corresponding to the first electric signal is different from that corresponding to the first pulse signal, and the modulation mode corresponding to the second electric signal is different from that corresponding to the second pulse signal; The measuring device inputs the first pulse light and the second pulse light to an optical fiber, and the first pulse light and the second pulse light are respectively used for measuring different modes of the optical fiber.
  2. 2. The method of claim 1, wherein the first pulsed light is used to measure the optical fiber in a first mode and the second pulsed light is used to measure the optical fiber in a second mode, the first mode being a distributed acoustic sensing, DAS, mode and the second mode being an optical time domain reflectometer, OTDR, mode.
  3. 3. The method according to claim 1 or 2, wherein the measuring device modulates the first electrical signal and the first pulse signal on the first optical signal to obtain the first pulsed light, comprising: Modulating the first electric signal and the first pulse signal on the first optical signal by the measuring device in a first time period to obtain the first pulse light; the measuring device modulates a second electric signal and a second pulse signal on a second optical signal to obtain second pulse light, and the measuring device comprises: Modulating the second electric signal and the second pulse signal on the second optical signal by the measuring device in a second time period to obtain the second pulse light, wherein the first time period and the second time period are two time periods which are not overlapped with each other; The measuring device inputting the first pulse light to an optical fiber, the second pulse light including: The measuring device inputs the first pulse light and the second pulse light to the optical fiber in a time-sharing manner.
  4. 4. A method according to claim 3, wherein the measuring device comprises a first signal generator, a signal control module and a modulation module, the measuring device modulating a first electrical signal and a first pulse signal on a first optical signal to obtain a first pulsed light, comprising: during the first period of time, the signal control module turns on a first circuit between the first signal generator and the modulation module; The first signal generator sends the first electric signal to the modulation module through the first circuit; the modulation module modulates the first electric signal and the first pulse signal on the first optical signal to obtain the first pulse light.
  5. 5. The method of claim 3 or 4, wherein the measuring device further comprises a second signal generator, a signal control module, and a modulation module, the measuring device modulating a second electrical signal and a second pulse signal onto a second optical signal to obtain a second pulsed light, comprising: During the second period of time, the signal control module turns on a second circuit between the second signal generator and the modulation module; the second signal generator sends the second electric signal to the modulation module through the second circuit; The modulation module modulates the second electric signal and the second pulse signal on the second optical signal to obtain the second pulse light.
  6. 6. The method of any one of claims 3 to 5, wherein the measurement device further comprises a light source, the measurement device modulates a first electrical signal and a first pulse signal onto a first optical signal to obtain a first pulse light, and the measurement device modulates a second electrical signal and a second pulse signal onto a second optical signal to obtain a second pulse light, the method further comprising: the light source transmits the first optical signal and the second optical signal to the modulation module in a time sharing mode.
  7. 7. The method according to claim 1 or 2, characterized in that the frequency range of the first electrical signal and the frequency range of the second electrical signal do not coincide with each other.
  8. 8. The method according to claim 1 or 7, wherein the frequency range of the first optical signal and the frequency range of the second optical signal do not coincide with each other.
  9. 9. The method of any one of claims 1 to 8, wherein the correlation of the first pulsed light over two adjacent periods is greater than the correlation of the second pulsed light over two adjacent periods.
  10. 10. The method according to any one of claims 1 to 9, wherein the measuring device comprises a third signal generator and a modulation module, the measuring device modulates a first electrical signal and a first pulse signal on a first optical signal to obtain a first pulsed light, and the measuring device modulates a second electrical signal and a second pulse signal on a second optical signal to obtain a second pulsed light, the method further comprising: the third signal generator transmits the first pulse signal and the second pulse signal to the modulation module.
  11. 11. The method of any one of claims 1 to 10, wherein the measurement device comprises a modulation module and a coupling module, the measurement device inputting the first pulsed light and the second pulsed light to an optical fiber comprises: The modulation module sends the first pulse light and the second pulse light to the coupling module; the coupling module inputs the first pulse light and the second pulse light to the optical fiber.
  12. 12. The method according to any one of claims 1 to 11, wherein after the measuring device inputs the first pulsed light and the second pulsed light to an optical fiber, the method further comprises: the measuring device receives first reverse light, wherein the first reverse light is an optical signal returned by the optical fiber according to the first pulse light to the measuring device; The measuring device receives second reverse light, wherein the second reverse light is an optical signal returned by the optical fiber according to the second pulse light to the measuring device; the measuring device measures the first mode of the optical fiber according to the first reverse light; The measurement device performs a second mode of measurement of the optical fiber based on the second reverse light, the first mode being different from the second mode.
  13. 13. The method of any one of claims 1 to 12, wherein the modulation scheme corresponding to the first electrical signal is modulating a phase of the first optical signal, the modulation scheme corresponding to the first pulse signal is modulating an amplitude of the first optical signal, the modulation scheme corresponding to the second electrical signal is modulating a phase of the second optical signal, and the modulation scheme corresponding to the second pulse signal is modulating an amplitude of the second optical signal.
  14. 14. The measuring device is characterized by comprising a light source, a signal generator and a modulation module; the light source is used for sending a first optical signal and a second optical signal to the modulation module; the signal generator is configured to send a first electrical signal, a second electrical signal, a first pulse signal and a second pulse signal to the modulation module, where the correlation of the first electrical signal on two adjacent periods is greater than the correlation of the second electrical signal on two adjacent periods, the modulation mode corresponding to the first electrical signal is different from the modulation mode corresponding to the first pulse signal, and the modulation mode corresponding to the second electrical signal is different from the modulation mode corresponding to the second pulse signal; The modulation module is used for: modulating the first electric signal and the first pulse signal on the first optical signal to obtain first pulse light; Modulating the second electrical signal and the second pulse signal on the second optical signal to obtain the second pulse light; and inputting the first pulse light and the second pulse light into an optical fiber, wherein the first pulse light and the second pulse light are respectively used for measuring different modes of the optical fiber.
  15. 15. The measurement device of claim 14, wherein the modulation module is configured to modulate the first electrical signal and the first pulse signal on the first optical signal to obtain a first pulse light, and is specifically configured to: modulating the first electrical signal and the first pulse signal on the first optical signal in a first time period to obtain the first pulse light; the modulation module is configured to modulate the second electrical signal and the second pulse signal on the second optical signal, so as to obtain the second pulse light, and specifically configured to: Modulating the second electric signal and the second pulse signal on the second optical signal in a second time period to obtain the second pulse light, wherein the first time period and the second time period are two time periods which are not overlapped with each other; The modulation module is used for inputting the first pulse light and the second pulse light to the optical fiber, and is specifically used for: And inputting the first pulse light and the second pulse light to the optical fiber in a time sharing mode.
  16. 16. The measurement device of claim 15, wherein the signal generator comprises a first signal generator, the measurement device further comprising a signal control module coupled between the first signal generator and the modulation module, the signal control module configured to, during the first period of time, turn on a first circuit between the first signal generator and the modulation module; The first signal generator is specifically configured to send the first electrical signal to the modulation module through the first circuit.
  17. 17. The measurement device of claim 15 or 16, wherein the signal generator comprises a second signal generator, the measurement device further comprising a signal control module connected between the second signal generator and the modulation module, the signal control module for switching on a second circuit between the second signal generator and the modulation module during the second time period; The second signal generator is specifically configured to send the second electrical signal to the modulation module through the second circuit.
  18. 18. The measurement device according to any one of claims 15 to 17, wherein the light source is configured to, in the process of sending the first optical signal and the second optical signal to the modulation module, specifically: And sending the first optical signal and the second optical signal to the modulation module in a time sharing mode.
  19. 19. The measurement device of claim 14, wherein the frequency range of the first electrical signal and the frequency range of the second electrical signal do not coincide with each other.
  20. 20. The measurement device of claim 14 or 19, wherein the frequency range of the first optical signal and the frequency range of the second optical signal do not coincide with each other.

Description

Measurement method, measurement device and optical fiber communication system Technical Field The present application relates to the field of optical fiber communications technologies, and in particular, to a measurement method, a measurement device, and an optical fiber communication system. Background An optical time domain reflectometer (optical time domain reflectometry, OTDR) technique is used to measure the insertion loss of the measured optical fiber and to monitor the reflection point of the measured optical fiber. The distributed acoustic wave sensing (distributed acoustic sensing, DAS) technology is used for measuring vibration, temperature, strain and other information of the surrounding environment of the measured optical fiber. Fig. 1 is a diagram showing an example of a structure of a conventional measuring apparatus. The measuring device 100 comprises a light source 101, a signal modulation unit 102, an optical switch 103, a scrambler 104, a coupling unit 105 and a measuring unit 106. The light source 101 transmits first pulse light to the signal modulation unit 102, and the signal modulation unit 102 modulates the first pulse light to obtain second pulse light. The measurement device 100 is configured to implement two different modes of measurement, mode 1 is a mode for implementing OTDR, and mode 2 is a mode for implementing DAS. If the measurement device implements the ODTR mode, the optical switch 103 turns on the optical path between the signal modulation unit 102 and the scrambler 104, and the scrambler scrambles the polarization of the second pulse light to obtain a third pulse light, so as to reduce the correlation of the third pulse light, and the scrambler 104 sends the third pulse light to the coupling unit 105, and the coupling unit 105 inputs the third pulse light to the measured optical fiber. When the DAS mode is implemented in the measuring device, the optical switch 103 turns on the optical path between the signal modulation section 102 and the coupling section 105, and the coupling section 105 inputs the second pulse light to the optical fiber to be measured. The measured optical fiber returns a first reverse light to the coupling unit 105 according to the third pulse light, the measured optical fiber returns a second reverse light to the coupling unit 105 according to the second pulse light, the coupling unit 105 transmits the first reverse light and the second reverse light to the measuring unit 106, the measuring unit 106 measures the OTDR mode of the measured optical fiber according to the first reverse light, and the measuring unit 106 measures the DAS mode of the measured optical fiber according to the second reverse light. However, the measuring device 100 shown in fig. 1 requires an optical switch and a scrambler, which increases the complexity of the structure of the measuring device 100. Disclosure of Invention The application provides a measuring method, a measuring device and an optical fiber communication system, which can realize the measurement of a plurality of different modes of a measured optical fiber under the condition of reducing the structural complexity. In a first aspect, the application provides a measurement method applied to a measurement device, the method comprises the steps that the measurement device modulates a first electric signal and a first pulse signal on a first optical signal to obtain first pulse light, the measurement device modulates a second electric signal and a second pulse signal on the second optical signal to obtain second pulse light, the correlation of the first electric signal on two adjacent periods is larger than that of the second electric signal on two adjacent periods, the modulation mode corresponding to the first electric signal is different from that corresponding to the first pulse signal, the modulation mode corresponding to the second electric signal is different from that corresponding to the second pulse signal, and the measurement device inputs the first pulse light and the second pulse light to an optical fiber, and the first pulse light and the second pulse light are respectively used for measuring different modes of the optical fiber. By adopting the method, the measuring device inputs the first pulse light and the second pulse light for realizing different-mode measurement to the optical fiber, so that the multi-mode measurement of the optical fiber is realized, an optical device (such as an optical switch, a scrambler and the like) for switching different-mode measurement is not needed to be added to the measuring device, the measuring device has no extra dependence on the optical device, and only signal processing (such as obtaining a first electric signal and a second electric signal for realizing different-mode measurement) on an electric domain is needed, so that the measuring device can realize the measurement of different modes of the measured optical fiber, the structural complexity of the measurin