A dual-clad fiber-based energy and information integrated device and a method of use

Abstract

The application provides a kind of energy and signal integration device based on double-clad optical fiber and use method, comprising: communication transmitting end, high-power laser transmitting end, double-clad optical fiber, photovoltaic converter, communication receiving end and sensing receiving end, wherein: communication transmitting end is connected with communication receiving end through the core of double-clad optical fiber, respectively for completing the transmission and receiving demodulation of communication optical signal;High-power laser transmitting end is connected with photovoltaic converter through the inner cladding of double-clad optical fiber, respectively for completing the sending and receiving conversion of energy optical signal;Sensing receiving end is used for detecting and demodulating the Rayleigh scattering light signal returned from the disturbance position of optical fiber, so as to obtain the disturbance position;Energy optical signal and communication optical signal are transmitted through inner cladding and core respectively, reducing the mutual interference between energy optical signal and communication optical signal, and sensing and positioning the disturbance of optical fiber, so as to realize the integration of energy optical signal transmission, communication optical signal transmission and sensing.

Description

Technical Field

[0001] This invention relates to the field of optical fiber communication transmission technology, and in particular to an integrated energy, signaling, and sensing device and its usage method based on double-clad optical fiber. Background Technology

[0002] With the development of 6G, high-capacity, multi-service, low-cost, and intelligent communication networks, the number of communication base stations and service terminals in these networks is gradually increasing, and they are developing towards miniaturization, intelligence, and passivity. This necessitates that fiber optic communication networks have more functions and greater intelligence. Furthermore, some substations, mines, and nuclear power plants require communication and power transmission equipment to be free from electromagnetic interference and strong electromagnetic fields. Therefore, fiber optic power-communication coexistence networks have emerged. However, most traditional fiber optic power-communication coexistence networks use single-mode fiber for power-communication co-transmission. The power optical signal and the communication optical signal interact, affecting the quality of the communication optical signal. In double-clad power-communication co-transmission systems, the transmitting end typically uses a tapered fiber combiner to couple the power optical signal and the communication optical signal into the fiber without separation optimization, resulting in a certain degree of mutual influence between the power optical signal and the communication optical signal.

[0003] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Summary of the Invention

[0004] The technical problem to be solved by this invention is how to reduce the mutual interference between power optical signals and communication optical signals when optical fiber and power optical signals coexist.

[0005] The present invention adopts the following technical solution:

[0006] In a first aspect, an integrated energy, information, and sensing device based on double-clad optical fiber is provided, comprising: a communication transmitter 1, a high-power laser transmitter 2, a double-clad optical fiber 3, a photovoltaic converter 4, and a communication receiver 5, wherein:

[0007] The double-clad optical fiber 3 includes a core 31, an outer cladding 32, and an inner cladding 33. The outer cladding 32 is located on the periphery of the core 31, and the inner cladding 33 is located between the outer cladding 32 and the core 31.

[0008] The communication transmitter 1 is connected to the communication receiver 5 through the fiber core 31. The communication transmitter 1 is used to send communication optical signals to the communication receiver 5 through the fiber core 31. The communication receiver 5 is used to demodulate the communication optical signals.

[0009] The high-power laser emitter 2 is used to send an energy light signal to the photovoltaic converter 4 through the inner cladding 33, and the photovoltaic converter 4 is used to convert the energy light signal into electrical energy.

[0010] Preferably, the integrated energy and information sensing device based on double-clad optical fiber further includes a sensing receiver 6 and a circulator 7, wherein:

[0011] The communication transmitter 1 is connected to one port of the circulator 7, the fiber core 31 is connected to two ports of the circulator 7, and the sensor receiver 6 is connected to three ports of the circulator 7.

[0012] The circulator 7 is used to transmit the communication optical signal input at one port to the fiber core 31 through the second port. The circulator 7 is also used to receive the Rayleigh scattered light signal in the fiber core 31 through the second port and transmit it to the sensing receiver 6 through the third port.

[0013] The sensing receiver 6 is used to demodulate the Rayleigh scattering light signal to obtain the disturbance position information on the double-clad optical fiber 3.

[0014] Preferably, the integrated energy, information, and sensing device based on double-clad optical fiber further includes a tapered bundler, wherein:

[0015] The high-power laser emitting end 2 is connected to the inner cladding 33 through the tapered beam combiner, and the energy light signal emitted by the high-power laser emitting end 2 forms a less than preset angle with the fiber core 31 of the double-clad optical fiber 3.

[0016] The preset angle is: ;

[0017] in, The refractive index of the inner cladding is... is the refractive index of the outer cladding layer.

[0018] Preferably, the communication transmitter 1 includes a narrow linewidth laser 11 and a modulator 12, wherein:

[0019] The input terminal of the modulator 12 is connected to the output terminal of the narrow linewidth laser 11, and the output terminal of the modulator 12 is connected to the input terminal of the circulator 7.

[0020] The modulator 12 is used to modulate the optical signal emitted by the narrow linewidth laser 11 to obtain a communication optical signal, and transmit the communication optical signal to the fiber core 31.

[0021] Preferably, the refractive index of the fiber core 31 is... The refractive index is greater than that of the inner cladding 33 The refractive index of the inner cladding 33 The refractive index is greater than that of the outer cladding layer 32. .

[0022] Preferably, the wavelength interval between the wavelength of the communication optical signal and the wavelength of the energy optical signal is greater than 5 nm.

[0023] Secondly, a method for using an integrated energy, information, and sensing device based on double-clad optical fiber is provided, for application in the aforementioned integrated energy, information, and sensing device based on double-clad optical fiber, comprising:

[0024] The communication transmitter 1 sends a communication optical signal to the communication receiver 5 through the fiber core 31 of the double-clad optical fiber 3, and the communication receiver 5 demodulates the received communication optical signal.

[0025] The high-power laser transmitter 2 sends an energy light signal to the photovoltaic converter 4 through the inner cladding 33 of the double-clad optical fiber 3, and the photovoltaic converter 4 converts the received energy light signal into electrical energy.

[0026] Preferably, the photovoltaic converter 4 converts the received light signal into electrical energy, specifically including:

[0027] The photovoltaic converter 4 converts the received light signal into electrical energy using the following formula:

[0028] ;

[0029] in, The current after the energy-optical signal is converted. The optical power of the energy optical signal. This refers to the loss factor of the energy optical signal transmitted within the inner cladding 33. This refers to the photoelectric responsivity of photovoltaic converter 4.

[0030] Preferably, the integrated energy, information, and sensing device based on double-clad optical fiber further includes a sensing receiver 6 and a circulator 7. The communication transmitter 1 is connected to one port of the circulator 7, the fiber core 31 of the double-clad optical fiber 3 is connected to two ports of the circulator 7, and the sensing receiver 6 is connected to three ports of the circulator 7.

[0031] The circulator 7 transmits the communication optical signal input at one port to the fiber core 31 of the double-clad optical fiber 3 through the second port. The circulator 7 also receives the Rayleigh scattered optical signal in the fiber core 31 through the second port and transmits it to the sensing receiver 6 through the third port.

[0032] The sensing receiver 6 demodulates the received Rayleigh scattering light signal to obtain the disturbance position information on the double-clad optical fiber 3.

[0033] Preferably, the sensing receiver 6 demodulates the received Rayleigh scattering light signal to obtain the disturbance position information on the double-clad optical fiber 3, specifically including:

[0034] The sensing receiver 6 performs photoelectric conversion on the received Rayleigh scattering light signal to obtain the current after Rayleigh scattering light signal conversion. The expression for the current after Rayleigh scattering light signal conversion is as follows:

[0035] ;

[0036] in, The current is the result of the Rayleigh scattered light signal being converted at sensor receiver 6. The optical power of the energy optical signal. The total loss factor of the energy optical signal from the input end of the inner cladding 33 to the perturbation position and from the perturbation position to the sensing receiver 6. The Rayleigh scattering coefficient is the energy light signal. The coupling coefficient for the Rayleigh-scattered energy light signal coupled to fiber core 31. The optical power of the communication optical signal. The total loss factor of the communication optical signal from the input end of the inner cladding 33 to the disturbance position and from the disturbance position to the sensor receiver 6. The Rayleigh scattering coefficient is the optical scattering coefficient of the communication signal. The photoelectric responsivity of the photoelectric converter at sensor receiver 6;

[0037] The current after Rayleigh scattering signal conversion was calculated. The relative time of the peak occurrence is used to obtain the disturbance position on the double-clad fiber 3, and the calculation formula is as follows:

[0038] ;

[0039] in, Let be the distance from the perturbation location on the double-clad fiber 3 to the communication transmitter 1, and let c be the speed of light in a vacuum. The refractive index of fiber core 31 is... The current after Rayleigh scattering light signal conversion The relative time when the peak occurs.

[0040] This invention provides an integrated energy, signal, and sensing device based on double-clad optical fiber, comprising: a communication transmitter 1, a high-power laser transmitter 2, a double-clad optical fiber 3, a photovoltaic converter 4, and a communication receiver 5. The communication transmitter 1 is connected to the communication receiver 5 via the core 31 of the double-clad optical fiber 3. The communication transmitter 1 transmits communication optical signals to the communication receiver 5 via the core 31 of the double-clad optical fiber 3. The communication receiver 5 demodulates the received communication optical signals. The high-power laser transmitter 2 is connected to the photovoltaic converter 4 via the inner cladding 33 of the double-clad optical fiber 3. The high-power laser emitter 2 is used to send energy optical signals to the photovoltaic converter 4 through the inner cladding 33 of the double-clad optical fiber 3. The photovoltaic converter 4 is used to convert the received energy optical signals into electrical energy. The sensing receiver 6 is used to demodulate the Rayleigh scattering light signal to obtain the disturbance position information on the double-clad optical fiber 3. The energy optical signal and the communication optical signal are transmitted through the inner cladding 33 and the fiber core 31 respectively, reducing the mutual interference between the energy optical signal and the communication optical signal, and sensing the fiber disturbance, thereby realizing the integration of energy optical signal transmission, communication optical signal transmission and sensing. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of an integrated energy, information, and sensing device based on double-clad optical fiber provided in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the structure of a double-clad optical fiber in an integrated energy, information, and sensing device based on a double-clad optical fiber, provided in an embodiment of the present invention.

[0044] Figure 3 This is a cross-section of the double-clad optical fiber and a cross-sectional view of the transmission of energy optical signals and communication optical signals in an integrated energy, information, and sensing device based on double-clad optical fiber, provided in an embodiment of the present invention.

[0045] Figure 4 This is a schematic diagram of another integrated energy, information, and sensing device based on double-clad optical fiber provided in an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of another integrated energy, information, and sensing device based on double-clad optical fiber provided in an embodiment of the present invention;

[0047] Figure 6This is a flowchart illustrating a method for using an integrated energy, information, and sensing device based on double-clad optical fiber, as provided in an embodiment of the present invention.

[0048] Figure 7 This is a flowchart of a method for obtaining the disturbance position on a double-clad optical fiber in a method of using an integrated energy, information, and sensing device based on a double-clad optical fiber, as provided in an embodiment of the present invention.

[0049] The attached figures are numbered as follows:

[0050] Communication transmitter 1; narrow linewidth laser 11; modulator 12; high-power laser transmitter 2; double-clad fiber 3; fiber core 31; outer cladding 32; inner cladding 33; photovoltaic converter 4; communication receiver 5; sensor receiver 6; circulator 7. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0052] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0053] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more. Furthermore, for example, the description may use the prefix "A" or "B" to describe the same type of nouns as two independent entities. In this case, the corresponding features defined with "A" and "B" are used only to distinguish between similar entities and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0054] As used in this invention, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from a particular value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the particular quantity, i.e., the limitations of the measurement system.

[0055] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as openly inclusive, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples; that is, although they may be incorporated into embodiments or examples using the above terms for reasons such as order and position, it does not limit them to be incorporated in combination by a single embodiment or example.

[0056] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0057] Example 1:

[0058] Embodiment 1 of the present invention provides an integrated energy, information, and sensing device based on double-clad optical fiber, such as... Figure 1 As shown, it includes: a communication transmitter 1, a high-power laser transmitter 2, a double-clad optical fiber 3, a photovoltaic converter 4, and a communication receiver 5, wherein:

[0059] like Figure 1 and Figure 2 As shown, the double-clad optical fiber 3 includes a core 31, an outer cladding 32, and an inner cladding 33. The outer cladding 32 is located on the periphery of the core 31, and the inner cladding 33 is located between the outer cladding 32 and the core 31.

[0060] In this embodiment, the fiber core 31 is located at the central axis of the double-clad optical fiber 3. The outer cladding 32 and the protective layer outside the outer cladding 32 serve as the outer protective layer of the entire double-clad optical fiber 3. The inner cladding 33 is located between the fiber core 31 and the outer cladding 32. The energy optical signal can be incident into the inner cladding 33 as an oblique ray and undergo multiple reflections on the inner sidewall of the inner cladding 33 in the form of an oblique ray, thereby realizing the transmission from one end of the double-clad optical fiber 3 to the other end of the double-clad optical fiber 3, thus effectively separating the optical signal transmitted in the inner cladding 33 from the optical signal transmitted in the fiber core 31.

[0061] The communication transmitter 1 is connected to the communication receiver 5 through the fiber core 31. The communication transmitter 1 is used to send communication optical signals to the communication receiver 5 through the fiber core 31. The communication receiver 5 is used to demodulate the communication optical signals.

[0062] Among them, the photovoltaic converter 4 is a ring-shaped photovoltaic converter. The ring-shaped photovoltaic converter 4 can receive almost all the energy light signals, which greatly increases the amount of energy light signals received and improves the energy conversion rate.

[0063] In this embodiment, the communication transmitter 1 is used to emit a narrow linewidth laser, and the narrow linewidth laser is modulated to obtain the communication optical signal, which is transmitted along the meridional ray in the fiber core 31.

[0064] The high-power laser emitter 2 is used to send an energy light signal to the photovoltaic converter 4 through the inner cladding 33, and the photovoltaic converter 4 is used to convert the energy light signal into electrical energy.

[0065] like Figures 1-3 As shown, in this embodiment, the high-power laser emitter 2 is connected to the inner cladding 33 of the double-clad optical fiber 3 via the tapered beam combiner. The energy light signal emitted from the high-power laser emitter 2 forms a less than preset angle with the core 31 of the double-clad optical fiber 3. The preset angle is... ,in, The refractive index of the inner cladding is... The refractive index of the outer cladding is [value missing]. The high-power laser emitter 2 directs the energy light signal as an oblique ray into the inner cladding 33 via the tapered beam combiner. This causes the energy light signal to undergo multiple reflections within the inner cladding 33 around the fiber core 31 in the form of an oblique ray, until it reaches the opposite end of the double-clad optical fiber 3 and is received by the photovoltaic converter 4. Figure 3The figure shows a cross-sectional view of the double-clad optical fiber 3. As can be seen from the figure, the energy optical signal undergoes multiple reflections in the form of oblique rays on the fiber core 31 side, meaning that most of the energy optical signal does not pass through the fiber core 31, greatly reducing the mutual interference between the energy optical signal and the communication optical signal. Furthermore, from... Figure 3 From the cross-sectional view, the inner cladding 33 has a circular cross-section, and the center of the inner cladding 33 is the fiber core 31. Therefore, in order to ensure that the photovoltaic converter 4 can fit the inner cladding 33, a circular photovoltaic converter 4 can be used to connect and match the cross-section of the inner cladding 33, thereby increasing the amount of energy light signal received and improving the energy conversion.

[0066] It should be noted that, in this embodiment, to achieve the transmission of energy optical signals by the inner cladding 33, the following requirements apply to the refractive index of the fiber core 31, the refractive index of the inner cladding 33, and the refractive index of the outer cladding 32: the refractive index of the fiber core 31... The refractive index is greater than that of the inner cladding 33 The refractive index of the inner cladding 33 The refractive index is greater than that of the outer cladding layer 32. Simultaneously, the communication optical signal and the energy optical signal need to be optical signals of different wavelengths, with a wavelength interval greater than 5 nm. This design enables the communication optical signal to undergo total internal reflection at the interface between the fiber core and the inner cladding, propagating along the fiber core, and the energy optical signal to undergo total internal reflection at the interface between the inner cladding and the outer cladding, propagating along the inner cladding.

[0067] In this embodiment, the inner cladding 33 and the fiber core 31 transmit energy optical signals and communication optical signals respectively, reducing mutual interference between energy optical signals and communication optical signals, thereby realizing the integration of energy optical signal transmission and communication optical signal transmission.

[0068] To further enhance the versatility and integration of the device's functions, sensing capabilities can be added to the integrated energy and information sensing device based on double-clad optical fiber. By receiving and demodulating Rayleigh scattering signals, the location of disturbances can be monitored and acquired. Therefore, this embodiment also involves the following design:

[0069] like Figure 4As shown, the integrated energy, communication, and sensing device based on double-clad optical fiber further includes a sensing receiver 6 and a circulator 7, wherein: the communication transmitter 1 is connected to one port of the circulator 7, the fiber core 31 is connected to two ports of the circulator 7, and the sensing receiver 6 is connected to three ports of the circulator 7; the circulator 7 is used to transmit the communication optical signal input from one port to the fiber core 31 through the two ports, and the circulator 7 is also used to receive the Rayleigh scattered light signal in the fiber core 31 through the two ports and transmit it to the sensing receiver 6 through the three ports; the sensing receiver 6 is used to demodulate the Rayleigh scattered light signal to obtain the disturbance position information on the double-clad optical fiber 3.

[0070] In this embodiment, when a disturbance occurs at a certain location in the double-clad optical fiber 3, strong Rayleigh scattering occurs at that location, reflecting the Rayleigh scattered light signal back in the opposite direction of the optical signal transmission. The sensor receiver 6 receives and demodulates the reflected Rayleigh scattered light signal, calculates the return time, and thus obtains the location of the disturbance in the double-clad optical fiber 3. This enables real-time monitoring of the double-clad optical fiber 3 and improves the intelligence of the link. The optical signal input at one port of the circulator 7 can only be output from port two; that is, the communication optical signal can only be input from port one and output from port two to the fiber core 31. The optical signal input at port two of the circulator 7 can only be output from port three, not port one. Therefore, the Rayleigh scattered light signal reflected from the fiber core 31, after being input from port two, will only be output from port three and received by the sensor optical signal. The circulator 7 enables the designated transmission and reception of different optical signals.

[0071] Furthermore, since the energy optical signal and the communication optical signal are transmitted in the same optical fiber, a portion of the backscattered light from the energy optical signal at the disturbance position of the double-clad optical fiber 3 will also couple into the fiber core 31 and be transmitted to the sensing receiver 6 as part of the Rayleigh scattering light signal. Compared with the Rayleigh scattering light signal generated separately by the communication optical signal, the intensity of the Rayleigh scattering light signal in this embodiment is higher, thereby improving the sensing sensitivity, reducing the sensitivity requirement of the photodetector in the sensing receiver 6, and saving the cost of accessories in the device.

[0072] Furthermore, since the communication optical signal needs to be obtained by modulating a narrow linewidth laser, the communication receiver 5 in this embodiment requires both a laser and a corresponding modulation device. Therefore, this embodiment also involves the following design:

[0073] like Figure 5As shown, the communication transmitter 1 includes a narrow linewidth laser 11 and a modulator 12, wherein: the input terminal of the modulator 12 is connected to the output terminal of the narrow linewidth laser 11, and the output terminal of the modulator 12 is connected to the input terminal of the circulator 7; the modulator 12 is used to modulate the optical signal emitted by the narrow linewidth laser 11 to obtain a communication optical signal, and transmit the communication optical signal to the fiber core 31.

[0074] In this embodiment, the modulator 12 can be a differential phase shift keying (DPSK) modulator, and the demodulation device in the communication receiver 5 can be a DPSK demodulator.

[0075] Example 2:

[0076] This embodiment, based on Embodiment 1, provides a method for using an integrated energy, information, and sensing device based on double-clad optical fiber, applicable to the integrated energy, information, and sensing device based on double-clad optical fiber as described in Embodiment 1. Figure 6 As shown, it includes:

[0077] In step 101, the communication transmitter 1 sends a communication optical signal to the communication receiver 5 through the fiber core 31 of the double-clad optical fiber 3, and the communication receiver 5 demodulates the received communication optical signal.

[0078] In this embodiment, the narrow linewidth laser 11 in the communication transmitter 1 emits an angular frequency of 11. The narrow linewidth laser, the expression for which is:

[0079] ;

[0080] in, The optical power of the communication optical signal. The initial phase of a narrow-linewidth laser. Let t be the mathematical expression for the emitted narrow-linewidth laser signal, where t is time.

[0081] The modulator 12 in the communication transmitter 1 modulates the narrow linewidth laser to obtain a communication optical signal, the expression of which is:

[0082] ;

[0083] in, This is the mathematical expression for the communication optical signal modulated from a narrow-linewidth laser signal, where t is time. The optical power of the communication optical signal. The initial phase of a narrow-linewidth laser. For the modulated phase, Each of these represents a different digital communication signal.

[0084] In step 102, the high-power laser emitting end 2 sends an energy light signal to the photovoltaic converter 4 through the inner cladding 33 of the double-clad optical fiber 3, and the photovoltaic converter 4 converts the received energy light signal into electrical energy.

[0085] The high-power laser emitter has an output radio frequency rate of 2. The energy light signal, the expression of which is:

[0086] y ;

[0087] Among them, y Let be the mathematical expression for the energy light signal, where t is time. The optical power of the energy optical signal. The initial phase of the energy light signal.

[0088] In this embodiment, the photovoltaic converter 4 is used to convert the received light energy signal into electrical energy, and store the electrical energy or use it to power a load. Specifically, the calculation formula for the photovoltaic converter 4 to convert the received light energy signal into electrical energy is as follows:

[0089] ;

[0090] in, The current after the energy-optical signal is converted. The optical power of the energy optical signal. This refers to the loss factor of the energy optical signal transmitted within the inner cladding 33. This refers to the photoelectric responsivity of photovoltaic converter 4.

[0091] Correspondingly, this embodiment also includes a corresponding sensing function, and the corresponding design is as follows: the integrated energy and information sensing device based on double-clad optical fiber also includes a sensing receiver 6 and a circulator 7. The communication transmitter 1 is connected to one port of the circulator 7, the fiber core 31 of the double-clad optical fiber 3 is connected to the second port of the circulator 7, and the sensing receiver 6 is connected to the third port of the circulator 7.

[0092] like Figure 7 As shown, the corresponding implementation method of the sensing function is as follows:

[0093] In step 201, the circulator 7 transmits the communication optical signal input at one port to the fiber core 31 of the double-clad optical fiber 3 through the second port. The circulator 7 also receives the Rayleigh scattered light signal in the fiber core 31 through the second port and transmits it to the sensing receiver 6 through the third port.

[0094] In step 202, the sensing receiver 6 demodulates the received Rayleigh scattering light signal to obtain the disturbance position information on the double-clad optical fiber 3.

[0095] The sensing receiver 6 performs photoelectric conversion on the received Rayleigh scattering light signal to obtain the current after Rayleigh scattering light signal conversion. The expression for the current after Rayleigh scattering light signal conversion is as follows:

[0096] ;

[0097] in, The current is the result of the Rayleigh scattered light signal being converted at sensor receiver 6. The optical power of the energy optical signal. The total loss factor of the energy optical signal from the input end of the inner cladding 33 to the perturbation position and from the perturbation position to the sensing receiver 6. The Rayleigh scattering coefficient is the energy light signal. The coupling coefficient for the Rayleigh-scattered energy light signal coupled to fiber core 31. The optical power of the communication optical signal. The total loss factor of the communication optical signal from the input end of the inner cladding 33 to the disturbance position and from the disturbance position to the sensor receiver 6. The Rayleigh scattering coefficient is the optical scattering coefficient of the communication signal. The photoelectric responsivity of the photoelectric converter at sensor receiver 6.

[0098] The current after Rayleigh scattering signal conversion was calculated. The relative time of the peak occurrence is used to obtain the disturbance position on the double-clad fiber 3, and the calculation formula is as follows:

[0099] ;

[0100] in, Let be the distance from the perturbation location on the double-clad fiber 3 to the communication transmitter 1, and let c be the speed of light in a vacuum. The refractive index of fiber core 31 is... The current after Rayleigh scattering light signal conversion The relative time when the peak occurs.

[0101] In summary, this embodiment, through the corresponding apparatus and method, can achieve the following beneficial effects:

[0102] 1. This invention provides an integrated power, communication and sensing device and method based on double-clad optical fiber. By integrating optical fiber power supply, communication and distributed sensing through double-clad optical fiber 3, the integration and intelligence of the optical fiber power and communication device are improved.

[0103] 2. A circular photovoltaic converter 4 is adopted. The shape of the circular photovoltaic converter 4 matches the interface of the inner cladding layer, so that the circular photovoltaic converter 4 can receive almost all the energy light signal, which greatly increases the amount of energy light signal received and improves the energy conversion.

[0104] 3. Since the energy optical signal and the communication optical signal are transmitted in the same optical fiber, a portion of the backscattered light of the energy optical signal at the disturbance position of the double-clad optical fiber 3 will be coupled into the fiber core 31 and transmitted to the sensing receiver 6 as part of the Rayleigh scattered light signal. This increases the intensity of the Rayleigh scattered light signal, improves the sensing sensitivity, reduces the requirements for high-sensitivity photodetectors, and saves the cost of components in the device.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated energy, information, and sensing device based on double-clad optical fiber, characterized in that, include: The communication transmitter (1), high-power laser transmitter (2), double-clad optical fiber (3), photovoltaic converter (4), and communication receiver (5) are as follows: The double-clad optical fiber (3) includes a core (31), an outer cladding (32) and an inner cladding (33). The outer cladding (32) is located on the periphery of the core (31), and the inner cladding (33) is located between the outer cladding (32) and the core (31). The communication transmitter (1) is connected to the communication receiver (5) through the fiber core (31). The communication transmitter (1) is used to send communication optical signals to the communication receiver (5) through the fiber core (31). The communication receiver (5) is used to demodulate the communication optical signals. The high-power laser emitter (2) is used to send an energy light signal to the photovoltaic converter (4) through the inner cladding (33), and the photovoltaic converter (4) is used to convert the energy light signal into electrical energy; The integrated energy and information sensing device based on double-clad optical fiber further includes a sensing receiver (6) and a circulator (7), wherein: the communication transmitter (1) is connected to one port of the circulator (7), the fiber core (31) is connected to two ports of the circulator (7), and the sensing receiver (6) is connected to three ports of the circulator (7); the circulator (7) is used to transmit the communication optical signal input from one port to the fiber core (31) through the two ports, and the circulator (7) is also used to receive the Rayleigh scattering light signal in the fiber core (31) through the two ports and transmit it to the sensing receiver (6) through the three ports; the sensing receiver (6) is used to demodulate the Rayleigh scattering light signal to obtain the disturbance position information on the double-clad optical fiber (3); The high-power laser emitter (2) is connected to the inner cladding (33) through a tapered beam combiner. The energy light signal emitted by the high-power laser emitter (2) forms a less than preset angle with the core (31) of the double-clad optical fiber (3). The sensing receiver (6) performs photoelectric conversion on the received Rayleigh scattering light signal to obtain the current after Rayleigh scattering light signal conversion. The expression for the current after Rayleigh scattering light signal conversion is: ； in, The current is the result of the Rayleigh scattered light signal being converted at the sensor receiver (6). The optical power of the energy optical signal. The total loss factor of the energy optical signal from the input end of the inner cladding (33) to the perturbation position and from the perturbation position to the sensing receiver (6) is given. The Rayleigh scattering coefficient is the energy light signal. The coupling coefficient for the Rayleigh-scattered energy light signal coupled to the fiber core (31) is given. The optical power of the communication optical signal. The total loss factor of the communication optical signal from the input end of the inner cladding (33) to the disturbance position and from the disturbance position to the sensing receiver (6) is given. The Rayleigh scattering coefficient is the optical scattering coefficient of the communication signal. The photoelectric responsivity of the photoelectric converter of the sensor receiver (6).

2. The integrated energy, information, and sensing device based on double-clad optical fiber according to claim 1, characterized in that, The integrated energy, information, and sensing device based on double-clad optical fiber also includes a tapered bundle combiner, wherein: The preset angle is: ; in, The refractive index of the inner cladding is... is the refractive index of the outer cladding layer.

3. The integrated energy, information, and sensing device based on double-clad optical fiber according to claim 1, characterized in that, The communication transmitter (1) includes a narrow linewidth laser (11) and a modulator (12), wherein: The input terminal of the modulator (12) is connected to the output terminal of the narrow linewidth laser (11), and the output terminal of the modulator (12) is connected to the input terminal of the circulator (7). The modulator (12) is used to modulate the optical signal emitted by the narrow linewidth laser (11) to obtain a communication optical signal and transmit the communication optical signal to the fiber core (31).

4. The integrated energy, information, and sensing device based on double-clad optical fiber according to claim 1, characterized in that, The refractive index of the fiber core (31) The refractive index is greater than that of the inner cladding (33). The refractive index of the inner cladding (33) The refractive index is greater than that of the outer cladding layer (32). .

5. The integrated energy, information, and sensing device based on double-clad optical fiber according to claim 1, characterized in that, The wavelength interval between the wavelength of the communication optical signal and the wavelength of the energy optical signal is greater than 5 nm.

6. A method of using an integrated energy, information, and sensing device based on double-clad optical fiber, for application in the integrated energy, information, and sensing device based on double-clad optical fiber as described in any one of claims 1-5, characterized in that, include: The communication transmitter (1) sends a communication optical signal to the communication receiver (5) through the fiber core (31) of the double-clad optical fiber (3), and the communication receiver (5) demodulates the received communication optical signal. The high-power laser emitter (2) sends an energy light signal to the photovoltaic converter (4) through the inner cladding (33) of the double-clad optical fiber (3), and the photovoltaic converter (4) converts the received energy light signal into electrical energy.

7. The method of using the integrated energy, information, and sensing device based on double-clad optical fiber according to claim 6, characterized in that, The photovoltaic converter (4) converts the received light energy signal into electrical energy, specifically including: The photovoltaic converter (4) converts the received light energy signal into electrical energy using the following formula: ； Among them, I ele The current after the energy-optical signal is converted. The optical power of the energy optical signal. The loss factor for the transmission of the energy optical signal in the inner cladding (33) is the loss factor. The photoelectric responsivity of the photovoltaic converter (4) is given.

8. The method of using the integrated energy, information, and sensing device based on double-clad optical fiber according to claim 6, characterized in that, The integrated energy and information sensing device based on double-clad optical fiber also includes a sensing receiver (6) and a circulator (7). The communication transmitter (1) is connected to one port of the circulator (7), the fiber core (31) of the double-clad optical fiber (3) is connected to the second port of the circulator (7), and the sensing receiver (6) is connected to the third port of the circulator (7). The circulator (7) transmits the communication optical signal input at one port to the fiber core (31) of the double-clad optical fiber (3) through the second port. The circulator (7) also receives the Rayleigh scattered optical signal in the fiber core (31) through the second port and transmits it to the sensing receiver (6) through the third port. The sensing receiver (6) demodulates the received Rayleigh scattering light signal to obtain the disturbance position information on the double-clad optical fiber (3).

9. The method of using the integrated energy, information, and sensing device based on double-clad optical fiber according to claim 8, characterized in that, The sensing receiver (6) demodulates the received Rayleigh scattering light signal to obtain the disturbance position information on the double-clad optical fiber (3), specifically including: The current after Rayleigh scattering signal conversion was calculated. The relative time of the peak occurrence is used to obtain the disturbance position on the double-clad fiber (3), and the calculation formula is as follows: ； in, Let c be the distance from the perturbation location on the double-clad optical fiber (3) to the communication transmitter (1), and let c be the speed of light in a vacuum. The refractive index of the fiber core (31) is... The current after Rayleigh scattering light signal conversion The relative time when the peak occurs.

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