• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    System and method for monitoring power and temperature in fiber optic networks. System and method for monitoring remote power supply and the increase in temperature associated with fiber optic networks fed with a high-power light source (2) that emits an optical signal (11) to a multicore optical fiber (8) that it comprises a variety of nuclei through which the optical signal (11) circulates to a remote node (7), the optical signal being reflected in a semi-reflective pound mirror (5) embedded in one of the nuclei (4) of the multicore optical fiber (8), part of the optical signal (11) being diverted through the same core (4) in which the optical signal (11) is reflected or towards a control and monitoring core (10) different from said core (4), that guides it to a monitoring and processing unit (9). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2760798A1
    申请号:ES201931134
    申请日:2019-12-19
    公开日:2020-05-14
    发明作者:García Carmen Vázquez；Montero David Sánchez；Cardona Juan Dayron López；Madrigal Javier Madrigal；Vilar David Barrera；Maicas Salvador Sales
    申请人:Universidad Politecnica de Valencia；Universidad Carlos III de Madrid；
    IPC主号:
    专利说明:

    [0001]
    [0002]
    [0003]
    [0004] OBJECT OF THE INVENTION
    [0005]
    [0006] The object of the invention is a system and method for monitoring remote power supply and the increase in temperature associated with fiber optic networks with spatial multiplexing using semi-reflective fiber mirrors.
    [0007]
    [0008] BACKGROUND OF THE INVENTION
    [0009]
    [0010] In networks that support the distribution of high-capacity radio signals, such as future 5G networks, the high demand for bandwidth opens the door to the need for a high-capacity infrastructure such as fiber optics to be able to transmit said signals from a central booth to different remote nodes, such as a remote antenna unit.
    [0011]
    [0012] In this context, within the so-called fronthaul based on optical fibers, and to increase their capacity in a compact way, the use of networks with spatial multiplexing based on multicore fibers, MCF ( Multicore Fiber) is proposed, together with an optical redirection of the make.
    [0013]
    [0014] Multicore fibers with M-cores allow the introduction of more than one single-mode core in the same section through which to transmit information, as in the case of conventional SMF ( Single Mode Fiber) fibers , so that in the same fiber section it is possible to transmit M times more information. These MCF fibers also make it possible to reduce the effect of fiber fusion or fiber fuse, which limits the maximum amount of power that can be transmitted by an optical fiber and which is proportional to its effective area.
    [0015]
    [0016] As an example, an SMF-28 fiber has an effective area of 80 ^ m2 and a fiber with four cores with an effective area each of 50 ^ m2 has a total effective area of 200 ^ m2, then the second fiber (MCF ) will transmit a maximum power per fiber 2.5 times greater than the first fiber (SMF).
    [0017] In future 5G networks over fiber, with a smaller effective coverage area per cell (picocells and femtocells) but with a higher bandwidth compared to current networks, it will be necessary to install a high density of antennas to service a certain coverage area and that will have to be supplied with energy for its correct operation. As a possible solution, it is proposed to remotely supply energy in the form of light ( Power by light or Power over Fiber-PoF) since there will be ducts that allow the deployment of the optical fiber to transmit the data.
    [0018]
    [0019] Thus, the joint use of multicore fibers for data and power transmission has been proposed. For this, the same MCF fiber can be used to transmit data and energy through the same core (scenario that could be called shared) or in a dedicated way, with some cores to send power and others to send data (scenario that could be called dedicated). . Or even using one MCF just for data and another MCF just for power.
    [0020]
    [0021] In any case, it is necessary to have a system that allows monitoring if the energy delivery is taking place correctly or if there is any leakage or loss in it, since the optical power levels to be sent will be high compared to the levels of signal considered.
    [0022]
    [0023] It is also interesting that the technique does not suppose an additional consumption in the remote node to which the transmission is being carried out, since initially it is sought that its consumption requirements be as low as possible.
    [0024]
    [0025] In relation to the current state of the art, different techniques have been proposed in the literature that allow monitoring of the optical signal sent, and even optical power levels in other environments, as is the case in the systems used to send light to a zone or part of the body for therapeutic purposes (US 7009692 B2) or in high power laser systems that exceed 1 kW (EP 3173753 A1).
    [0026]
    [0027] In any case, there are no techniques for monitoring in the case of high-power MCF fiber-based systems, operating in the tens of W range. As already indicated, the technique does not imply additional consumption in the remote node, as is the case in RRH ( Remote Radio Heads), and with centralized network management. Using conventional monitoring techniques, it can be monitored at the remote node through a photodiode and using a filter that extracts part of said signal. It It supposes adding a minimum intelligence in the node that will increase its consumption and also the presence of a passive device with insertion losses resulting in a worsening in the resulting efficiency of the system.
    [0028]
    [0029] A fiber optic powered system has also been proposed to feed different sensors in a well (US 769901 B2) and information is sent to the central office but it does not have any technique to specifically monitor the level of optical power. The same occurs with the proposed system for feeding a powered element with light (WO 2013/052178 A3).
    [0030]
    [0031] Proposals have also been made to use spatial division multiplexing in optical fronthaul for mobile networks and its integration with PoF, but no specific monitoring techniques have been proposed. Likewise, it has been proposed to remotely feed antennas with high power levels, but without the use of Space Division Multiplexing (SDM ), limited to short distances of hundreds of meters and without any power monitoring technique. transmitted and / or temperature, or both simultaneously.
    [0032]
    [0033] Another additional problem that can arise when sending power in the form of light, depending on the power levels in question, is the increase in temperature in the cores of the MCF fiber that must be measured / monitored to ensure that it works. in safe conditions and sometimes, without dramatically affecting the signal quality of the data traffic transmitted over the network.
    [0034]
    [0035] Given the dimensions of the nuclei of the multicore fiber and the separation between them, it is difficult to be able to carry out an adequate spatial discrimination of the temperature by means of conventional non-invasive techniques, such as thermal imaging cameras, together with the cost They can have the same if the need for measuring temperatures in regions of tens of microns or less arises, and the need for proper positioning of the same.
    [0036]
    [0037] In other alternatives, FBGs ( Fiber Bragg Gratings) engraved on MCF fibers (FBG-MCF) have been proposed for the measurement of temperature (US 7379631), torsion and other parameters (US 2014/0029889 A1), or for decoupling temperature and deformation (US 8123400 B2). There are also systems for temperature control in optical amplifiers (US 7130110 B2) that use demultiplexers and photodiodes.
    [0038] On the other hand, it has recently been proposed to measure the physical parameters of Tilted Fiber Bragg Gratings ( TFBG) (US 9857290 B2) in general, but not to monitor the power distributed within the fiber and its influence on the network temperature due to its injection into the fiber core.
    [0039]
    [0040] In view of the technique, a solution is needed that allows monitoring and preventing failures (due to temperature variations) in fiber optic networks with spatial multiplexing due to the injection of high-power optical signals for the purpose of remote power supply by light ( PoF) that efficiently solves the drawbacks presented by the systems of the prior art, without affecting the existing data traffic in the network and with minimal penalty in power compared to the PoF signal itself sent for this purpose of remote supply.
    [0041]
    [0042] To this end, the present invention proposes a method and system for monitoring remote power solutions integrated in an optical distribution network, especially in optical networks based on multicore fibers, without the need to interfere or interrupt service data traffic ( in-service).
    [0043]
    [0044] DESCRIPTION OF THE INVENTION
    [0045]
    [0046] This document proposes a system and method for the simultaneous monitoring of the energy level of an optical signal with its energy mainly focused on a first wavelength that is sent from a central unit comprising a high power light source (HPL) a node remote through an optical fiber multicore (multicore fiber MCF) with multiple cores, as well as the temperature increase experienced in the optical fiber multicore as a result of sending an optical signal of high energy as light through Of the same.
    [0047]
    [0048] In the present invention, it is proposed that, through the proper use of some components of the optical spectrum of the high-power light source and the interaction of these with semi-reflective and wavelength-selective fiber mirrors embedded in at least one of the nuclei of the multicore optical fiber, it is possible to identify or monitor other aspects or physical parameters of interest in the remote node, with minimal loss of energy, as well as temperature variations suffered by the multicore optical fiber.
    [0049] The described system and method are also extrapolated to measure other parameters or physical phenomena of interest, such as deformation, bending, attenuation, etc. which could also be monitored.
    [0050]
    [0051] Specifically, in the system object of this invention, in order to carry out the monitoring, the proposed system comprises semi-reflective wavelength-selective mirrors recorded / inscribed in at least one of the nuclei of the multicore optical fiber in which it is to be produced. the high-power optical signal, taking advantage of the special transmission / reflection characteristics of these semi-reflective fiber mirrors in certain regions of the light spectrum.
    [0052]
    [0053] The optical signal generated by the high power light source is thus reflected in the semi-reflective fiber mirrors. By properly designing and arranging each semi-reflective fiber mirror within the nuclei of the multicore optical fiber, it is possible to control the propagation direction of the reflected optical signal.
    [0054]
    [0055] A possible type of semi-reflective fiber mirror to be inscribed in multicore fiber optics could be the one based on a Tilt Fiber Bragg Grating (TFGG ) network that works as a wavelength-selective and semi-reflective fiber mirror. .
    [0056]
    [0057] A part of the optical signal (in wavelength) is therefore reflected in the semi-reflective fiber mirror, obtaining a reflected optical signal, which is sensitive to the temperature variations suffered in the nuclei of the multicore optical fiber. The reflected optical signal can be addressed with two alternatives.
    [0058]
    [0059] The first alternative is that the reflected optical signal returns through the same nucleus through which the optical signal circulated. In this case, it is possible to adequately filter in the semi-reflective fiber mirror the optical signal provided by the high-power light source that is used for purposes of remote feeding through the fiber itself to the remote node.
    [0060]
    [0061] A second alternative is that the reflected optical signal is redirected by the semi-reflective fiber mirror to a control and monitoring core. This control and monitoring nucleus is a nucleus exclusively destined to collect the reflected optical signal and conduct it either to the central unit (central monitoring) or to the remote node (distributed monitoring).
    [0062] To complete the monitoring, the central unit includes, in addition to the high-power light source, a monitoring and processing unit responsible for detecting the optical signal reflected by the semi-reflective fiber mirror (s), embedded in the multicore optical fiber, and which as just indicated can be reached either by the multicore fiber optic cores or by the control and monitoring core.
    [0063]
    [0064] In an alternative embodiment of the invention, the monitoring and processing unit can be located in an external remote node, outside the central unit, achieving distributed monitoring. Furthermore, in this embodiment, semi-reflective fiber mirrors embedded in a fiber can be arranged at the input of the external remote node.
    [0065]
    [0066] The monitoring and processing unit, using appropriate data processing techniques and based on the reflected optical signal, will evaluate the optical power provided by the high-power light source, as well as the increase in temperature suffered in one or more nuclei of the multicore optical fiber as a result of the injection of high energy through the multicore optical fiber.
    [0067]
    [0068] You can integrate as many semi-reflective fiber mirrors as necessary if you want to monitor the energy level and / or temperature at different points of the multicore optical fiber.
    [0069]
    [0070] Once an appreciable temperature increase has been identified, the processing can be complemented with other distributed sensing techniques in the fiber to locate if there are hot spots in the multicore optical fiber.
    [0071]
    [0072] In one embodiment of the system, a light injection device, positioned between the central unit and the multicore fiber optic, and a light extraction device on the multicore fiber optic, positioned between the multicore fiber optic and the remote node, are employed. In this case, the semi-reflective fiber mirrors can be embedded in connectors positioned on single-mode fibers behind the extraction device.
    [0073]
    [0074] On the other hand, the method of monitoring power and temperature in fiber optic networks, associated with the described system, firstly comprises a stage of injection into the multicore optical fiber, specifically in one of the nuclei that constitute it, of a signal optics from the high-power light source, with an emission spectrum characteristic that allows to operate on it in an optical band for the purposes of simultaneous monitoring.
    [0075]
    [0076] The second step would be to reflect a part of the optical signal injected by the high-power source into a core of the multicore fiber optic, which may be the same or may be a different core to the one through which the optical signal is sent, the monitoring and control core, within a certain band, called monitoring band, by means of wavelength selective semi-reflective fiber mirrors in suitable arrangement on one or more cores of the multicore optical fiber.
    [0077]
    [0078] In the third step, the optical signal reflected by each semi-reflective fiber mirror is received in the monitoring unit and processed, which comes through the control and monitoring core.
    [0079]
    [0080] This third stage may include multiplexing the high power light source with customer service data on the network in a shared monitoring scenario, each operating in a different optical band, as well as demultiplexing the optical signals reflected by the semi-reflective fiber mirrors and the customer service data on the network, each operating in a different optical band. And deliver said reflected optical signals to the processing unit.
    [0081]
    [0082] Next, in the fourth step, the state of operation of the system is determined, as well as the temperature variations suffered in the multicore optical fiber by the injection of the high-energy optical signal by means of the analysis of the reflected optical signal received in the unit. monitoring and processing. In this step, the state of correct operation of the system can be determined from the analysis of the detected power intensity of the reflected signal while the temperature variations are determined by means of the spectral analysis of said reflected optical signal. At this stage, the reflected optical signal can also be analyzed in terms of intensity (optical power) and wavelength.
    [0083]
    [0084] Finally, in the fifth step, the energy transmitted at one or several points of the multicore optical fiber simultaneously is determined, and which may be different from the remote node.
    [0085] Therefore, and by way of summary, the system and method of monitoring power and temperature variation in fiber optic networks proposed in this document, allow to perform simultaneously:
    [0086] - the feeding by means of an optical signal, preferably high power HPL light guided on a multicore optical fiber, in any of the scenarios that could be foreseen indicated above, shared- and / or dedicated-, from a remote node, with minimal loss power,
    [0087] - the monitoring, preferably by means of a monitoring and processing unit located in a central unit or transmitter block, of the optical power sent by the high-power light source for remote supply purposes, said high-power light source located in the central unit,
    [0088] - monitoring, preferably through the implementation of a monitoring and processing unit located in the central unit or transmitter block, of the increase in temperature suffered by one or more multicore fiber optic cores due to the injection of an optical signal into a said multicore optical fiber,
    [0089] - monitoring, at different points in the network, preferably at the remote node and in the distribution areas in point-multipoint systems,
    [0090] - control of whether the energy sent in the form of light reaches the receiving node by having a footprint of it in the central unit,
    [0091] - obtaining the simultaneous measurement of the possible increase in temperature in the nuclei of the multicore optical fiber as a consequence of sending energy in the form of light,
    [0092] - monitoring of both parameters indicated above (power supplied by the light source and temperature variation) by receiving a single reflected optical signal,
    [0093] - obtaining minimum insertion losses and monitoring in a control channel different from that of the energy transmission, using techniques in the optical or all-optical domain, and
    [0094] - monitoring the distribution of energy by optical means at different points in the network.
    [0095]
    [0096] DESCRIPTION OF THE DRAWINGS
    [0097]
    [0098] To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical embodiment thereof, a set of drawings is included as an integral part of said description in where, by way of illustration and not limitation, the following has been represented: Figure 1.- Shows a schematic view of the power and temperature monitoring system in fiber optic networks.
    [0099]
    [0100] Figure 2.- Shows the operating principle of a wavelength selective and semi-reflective fiber mirror device inscribed in a multicore fiber.
    [0101]
    [0102] PREFERRED EMBODIMENT OF THE INVENTION
    [0103]
    [0104] Next, the system and method of monitoring power and temperature in fiber optic networks is described, with the help of Figures 1 and 2, referred to above.
    [0105]
    [0106] Figure 1 shows a schematic view of the system object of the present invention that comprises a central unit (1), which in turn comprises a high-power light source (2) that emits an optical signal (11) coupled to a multicore optical fiber (8) with a variety of cores (4), connected to a remote node (7). The central unit (1) also includes a unit for monitoring and processing (9) a reflected optical signal (12).
    [0107]
    [0108] The system also includes at least one semi-reflective fiber mirror (5) and wavelength selective, embedded or inscribed in one or more of the cores (4) of the multicore optical fiber (8) in which it is to be produced. the power distribution to feed the remote node (7). In this way, the optical signal (11) is reflected in the semi-reflective fiber mirrors (5) obtaining a reflected optical signal (12).
    [0109]
    [0110] These semi-reflective fiber mirrors (5) can be embedded in connectors positioned at different points on the multicore fiber (8).
    [0111]
    [0112] The reflex optical signal (12) is directed by the semi-reflective fiber mirrors towards a control and monitoring core (10), as shown in Figure 2, which is one of the cores (4) that make up the optical fiber multicore (8). Thus, the reflected optical signal (12) circulates through the control and monitoring core (10) to the monitoring and processing unit (9), where it is analyzed.
    [0113] Specifically, a minimum part of the optical signal (11) can be diverted to the control and monitoring core (10) or even part of the optical signal (11) can be diverted to the core (4) on which the monitoring, at a certain wavelength, or central wavelength of the mirror in semi-reflective fiber (5). The central reflection wavelength will be far enough from the wavelength at which the energy and / or data in the case of using a shared scenario in which service data is sent by the same core (4) in addition to the remote energy through the high-power light source (2) located in the central unit ( one).
    [0114]
    [0115] The proposed system or technique will allow monitoring, preferably centrally, of the reflected optical signal (12) by the semi-reflective fiber mirrors (5) taking advantage of their special transmission / reflection characteristics in certain regions of the light spectrum, so that they can adequately filter and sense the optical signal (11) coming from the high power light source (2) that is used for remote powering purposes, through the multi-core optical fiber (8) towards the remote node ( 7).
    [0116]
    [0117] The described system therefore allows the simultaneous monitoring of the supplied optical power and / or temperature variations in the multicore optical fiber (8) due to the sending of the optical signal (11), which is a high energy optical signal.
    [0118]
    [0119] As described, the system uses a single high-power light source (2) whose emission spectrum must be compatible with the implementation of remote power distribution techniques ( Power-over-Fiber, PoF) over This type of physical transmission medium (multicore optical fiber (8), MCF) for different applications of interest within the new generation optical networks, while allowing certain parameters of the multicore optical fiber (8) to be monitored, so In particular, the correct distribution of optical power from the high-power light source (2), as well as temperature variations as a consequence of sending high energy through the multicore optical fiber (8) (although it can be extrapolated to other parameters of interest such as deformation, bending, optical power, ...).
    [0120]
    [0121] All this is possible through the application of convenient monitoring and processing techniques, starting from the portion of the reflected / transmitted optical spectrum of the reflected optical signal (12) by the semi-reflective fiber mirrors (5) that also favor the transfer energy between the cores (4) of the multicore optical fiber (8), specifically towards the control and monitoring cores (10).
    [0122]
    [0123] The effect of using the semi-reflective fiber mirror (5) and wavelength selective on the energy transmission will be minimal and in accordance with the type of high power light source (2) used to send the energy.
    [0124] The reflected optical signal (12) from the semi-reflective fiber mirror (5) can be processed in the central unit (1), specifically in the monitoring and processing unit (9) to identify the correct operation of the system and by monitoring some of its characteristics can be determined simultaneously, by receiving a single reflected optical signal (12) in the monitoring and processing unit (9), the correct distribution of optical power from the high-power light source (2 ) to the remote node (7) (detected signal intensity) as well as the average temperature variation in the multicore optical fiber (8) due to the injection of the high energy optical signal (11) by the light source high power (2) (wavelength of the detected signal) or any other parameter of interest previously identified, compatible with some measurable characteristic capable of being measured and processed by said unit d and monitoring and processing (9).
    [0125]
    [0126] The bandwidth of this reflected optical signal (12) must be within a certain band, called the monitoring band. The reflected wavelength belongs to a different optical band from the optical band used to serve the clients of the fiber optic network (data traffic) as well as that used by the high power light source (2 ) for remote powering purposes.
    [0127]
    [0128] By means of the adequate design and arrangement of each semi-reflective fiber mirror (5) within the multicore optical fiber (8), it is possible to control the direction of propagation of said reflected optical signal (12) by it, which can be processed in the monitoring unit and processed (9) within the central unit (1) (centralized monitoring) or at the remote node (7) (distributed monitoring) as appropriate, to identify the correct operation of the system and monitor the parameter of interest.
    [0129]
    [0130] In the proposed multi-core fiber optic monitoring system (8), the semi-reflective fiber mirrors (5), suitably designed, will cause part of the light to:
    [0131] - transmitted forward in an adjacent core (4) due to crosstalk (XT), "forward coupled light", preferably in the control and monitoring core (10), - transmitted backwards in another core (4) adjacent due to back crosstalk (BTX), "back coupled light", preferably in the control and monitoring core (10).
    [0132]
    [0133] The reflected optical signal (12) will be received in the monitoring and processing unit (9) and, through the application of convenient monitoring techniques in the optical domain, said monitoring and processing unit (9) will be able to determine the characteristics of the correct power delivery, as well as the temperature variations associated with the multicore optical fiber (8) due to the injection of high-energy light on said multicore optical fiber ( 8).
    [0134]
    [0135] Likewise, the object of the present invention is a method of monitoring power and temperature in fiber optic networks, associated with the described system, comprising the steps of:
    [0136] - injection into the multicore optical fiber (8), specifically in one of the nuclei (4) that make it up, of an optical signal (11) from the high-power light source (2), with a characteristic emission spectrum that allows to operate on it in an optical band for the purposes of simultaneous monitoring,
    [0137] - reflection of part of the spectrum of the optical signal (11) injected by the high power source (2) into a core (4) of the multicore optical fiber, preferably in the control and monitoring core (10), within a certain band, called monitoring band, by means of the wavelength selective semi-reflective fiber mirrors (5) in suitable arrangement on one or more cores (4) of the multicore optical fiber (8),
    [0138] - reception in the monitoring and processing unit (9) of the reflected optical signal (12) for each semi-reflective fiber mirror (5),
    [0139] - determination of the operating state of the system, as well as the temperature variations suffered in the multicore optical fiber (8) by the injection of the high-energy optical signal (11) by means of the analysis of the reflected optical signal (12) received in the monitoring and processing unit (9), and
    [0140] - determination of the energy transmitted at one or more points of the multicore optical fiber (8) simultaneously, and which may be different from the remote node (7).
    权利要求:
    Claims (15)
    [1]
    1. - Power and temperature monitoring system in fiber optic networks, characterized by comprising:
    - a central unit (1),
    - a high power light source (2) emitting an optical signal (11) with its energy mainly centered on a first wavelength, located in the central unit (1),
    - a multicore optical fiber (8) associated with the central unit (1) and comprising a variety of cores (4) through which the optical signal (11) circulates to a remote node (7),
    - at least one wavelength selective semireflective fiber mirror (5), embedded in at least one of the cores (4) of the multicore optical fiber (8), intended to reflect a part of the optical signal (11) to a second wavelength different from the first wavelength, obtaining a reflected optical signal (12), and
    - a monitoring and processing unit (9) intended to monitor and process the reflected optical signal (12).
    [2]
    2. - The system of claim 1, further comprising a control and monitoring core (10) comprised in the multicore optical fiber (8), through which the reflected optical signal (12) circulates through the mirror in semi-reflective fiber ( 5) to the monitoring and processing unit (9).
    [3]
    3. - The system of claim 1, further comprising an injection device (3) for the optical signal (11), positioned between the central unit (1) and the multicore optical fiber (8), and an extraction device (6) of the optical signal (11), positioned between the multicore optical fiber (8) and the remote node (7).
    [4]
    4. - The system of claim 1, wherein the at least one semi-reflective fiber mirror (5) is embedded in the remote node (7).
    [5]
    5. - The system of claim 3, wherein the at least one semi-reflective fiber mirror (5) is embedded in the extraction device (6).
    [6]
    6. - The system of claim 1, wherein the semi-reflective fiber mirrors (5) are inclined Bragg grid filters.
    [7]
    7. - The system of claim 1, wherein the monitoring and processing unit (9) is located in the central unit (1).
    [8]
    8. - The system of claim 1, wherein the monitoring and processing unit (9) is located at an external remote node.
    [9]
    9. - The system of claim 1, wherein the semi-reflective fiber mirrors (5) are embedded in connectors positioned at different points on the multicore fiber (8).
    [10]
    10. - The system of claim 3, wherein the semi-reflective fiber mirrors (5) are embedded in connectors positioned in single-mode fibers after the extraction device (6).
    [11]
    11. - The system of claim 8, wherein the semi-reflective fiber mirrors (5) are embedded in single-mode input fibers to the external remote node.
    [12]
    12. - The system of claim 1, wherein the monitoring and processing unit (9) has the capacity to measure any other parameter of interest that can be extracted from the analysis of the intensity and spectrum of the reflected optical signal (12) .
    [13]
    13. - Method for monitoring power and temperature in fiber optic networks, which makes use of the system of claim 1, characterized in that it comprises the steps of:
    - injection into at least one of the cores (4) of the multicore optical fiber (8), of an optical signal (11) with its energy mainly focused on a first wavelength at a first wavelength,
    - reflection of a part of the optical signal (11) to a second wavelength different from the first wavelength, in at least one semi-reflective fiber mirror (5) obtaining a reflected optical signal (12),
    - reception and analysis in the monitoring and processing unit (9) of the reflected optical signal (12),
    - determination, in the monitoring and processing unit (9), of temperature variations in the multicore optical fiber (8) from the reflected optical signal (12), and
    - determination, in the monitoring and processing unit (9), of energy transmitted in one or more points of the multicore optical fiber (8) from the reflected optical signal (12).
    [14]
    14. - The method of claim 13, wherein the reflection of a part of the optical signal (11) to a second wavelength different from the first wavelength, in at least one semi-reflective fiber mirror (5) it is carried out on the core (4) in which the semi-reflective fiber mirror (5) is positioned.
    [15]
    15. - The method of claim 13, wherein the reflection of a part of the optical signal (11) to a second wavelength different from the first wavelength, in at least one semi-reflective fiber mirror (5) it is performed on a control and monitoring core (10) comprised in the multicore optical fiber (8).
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    同族专利:
    公开号 | 公开日
    ES2760798B2|2020-10-08|
    WO2021123471A1|2021-06-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2016112422A1|2015-01-14|2016-07-21|Adelaide Research & Innovation Pty Ltd|Temperature sensor|
    CN105444922A|2015-11-13|2016-03-30|济南大学|Optical fiber grating temperature sensor wavelength shift correction method and temperature measuring device|
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    PCT/ES2020/070732| WO2021123471A1|2019-12-19|2020-11-24|System and method for monitoring power and temperature in optical fibre networks|
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