Multi-light source self-heating modulation module, method and optical fiber coding recognition system, method

Abstract

A multi-light source self-heating modulation module, method, and optical fiber coding identification system and method. A light source selection unit is used to select a target pulse light source from multiple pulse light sources and start operation. Based on the relationship between the temperature rise of the light source and the wavelength, the main control unit accurately calculates the self-heating time required to achieve the target wavelength pulse light source, thereby determining the connection time between the target pulse light source and the pulse control unit to ensure the generation of a pulse light wave of the target wavelength. After the self-heating time has elapsed, the pulse control unit will further modulate to finally obtain a pulse light wave of the target wavelength and time. Therefore, the multi-light source self-heating modulation module of the embodiment of the present invention relies on the self-heating of the pulse light source to change the wavelength of the emitted pulse light wave, and the control unit accurately calculates to achieve temperature modulation of pulse light waves of different wavelengths. Compared with temperature modulation using a temperature modulation device, the cost of the device itself is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber communications, and in particular to a multi-light source self-heating modulation module and method, and an optical fiber coding recognition system and method. Background Art

[0002] In the field of fiber optic communications, fiber coding, a technical means of uniquely identifying optical fiber media, consists of multiple fiber Bragg gratings (FBGs) of varying wavelengths. Fiber coding identification systems are optical detection systems that accurately identify the wavelengths of these FBGs. Existing fiber coding identification systems primarily use wavelength detectors (AD acquisition cards), which have long acquisition times and primarily utilize non-communication wavelengths. The central wavelength lightwave bandwidth emitted by a single laser is too large, resulting in insufficient identification accuracy. These issues severely impact the application of fiber coding in PON networks, hindering the identification, management, and operation of PON networks.

[0003] At present, in order to improve the recognition accuracy of optical fiber coding, related technologies will use multiple tunable laser modules with different central wavelengths to emit light one by one in a patrol cycle, and cooperate with a fast recognition module composed of an APD photoelectric collector and an AD acquisition card, and can complete the reflection signal collection of a single central wavelength light source in the entire optical fiber link at one time, ultimately achieving rapid recognition of optical fiber coding. This technology will be combined with a temperature modulation device to act on the light-emitting chip to achieve multiple changes in the central wavelength of a single light source, and then achieve a single light source to send light waves with different central wavelengths to improve the recognition accuracy of optical fiber coding. Since a large number of tunable laser modules will be used as light sources, a corresponding number of temperature modulation devices, such as semiconductor coolers (TECs), will be equipped, resulting in relatively high costs. In addition, the semiconductor coolers are small in size, and the process of installing them on the light source device is relatively difficult, which indirectly increases the production cost of the entire device. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a multi-light source self-heating modulation module to solve the problem of high cost of temperature modulation devices used in current optical fiber code recognition devices.

[0005] The present invention also provides a multi-light source self-thermal modulation method, a computer-readable storage medium, a multi-light source self-thermal modulation optical fiber coding identification system and a multi-light source self-thermal modulation optical fiber coding identification system method.

[0006] A multi-light source self-heating modulation module according to an embodiment of the first aspect of the present invention includes:

[0007] A plurality of pulse light sources, each of which heats up to change wavelength as the operating time increases;

[0008] a light source selection unit, wherein the plurality of input ends thereof are respectively connected to the output ends of the plurality of pulse light sources, and the light source selection unit is used to select one of the plurality of pulse light sources for light wave output;

[0009] A pulse control unit, whose input end is connected to the output end of the light source selection unit, and whose output end is used to output a pulse light wave with a wavelength and a length corresponding to the optical fiber code to be identified;

[0010] The main control unit is electrically connected to the plurality of pulse light sources, the light source selection unit, and the pulse control unit respectively.

[0011] The multi-light source self-heating modulation module according to the embodiment of the present invention has at least the following beneficial effects:

[0012] By utilizing the light source selection unit to select one of the multiple pulse light sources, namely the target pulse light source, and start the operation, based on the relationship between the light source temperature rise and the wavelength, the main control unit accurately calculates the self-heating time required to achieve the target wavelength pulse light source, and determines the connection time between the target pulse light source and the pulse control unit based on the self-heating time to ensure the generation of the target wavelength pulse light wave. After the self-heating time, the pulse control unit will further modulate to finally obtain the target wavelength and time pulse light wave. Therefore, for the multi-light source self-heating modulation module of the embodiment of the present invention, it relies on the self-heating of the pulse light source to change the wavelength of the emitted pulse light wave, and the control unit accurately calculates to achieve the temperature modulation of the pulse light wave of different wavelengths. Compared with the use of a temperature modulation device for temperature modulation, the cost of the device itself is greatly reduced.

[0013] According to some embodiments of the present invention, the light source selection unit adopts an SOA optical switch, multiple input ends of the SOA optical switch are respectively connected to the output ends of multiple pulse light sources, and the output end of the SOA optical switch is connected to the input end of the pulse control unit.

[0014] According to some embodiments of the present invention, the light source selection unit adopts a wavelength division multiplexer, the multiple input ends of the wavelength division multiplexer are respectively connected to the output ends of the multiple pulse light sources, the output end of the wavelength division multiplexer is connected to the input end of the pulse control unit, and the wavelength division multiplexer is electrically connected to the main control unit.

[0015] According to some embodiments of the present invention, the pulse control unit adopts an electro-optical modulator, the input end of the electro-optical modulator is connected to the output end of the light source selection unit, the output end of the electro-optical modulator is used to output a pulse light wave with a wavelength and time length corresponding to the optical fiber code to be identified, and the electro-optical modulator is electrically connected to the main control unit.

[0016] According to some embodiments of the present invention, the pulse control unit adopts an SOA modulator, the input end of the SOA modulator is connected to the output end of the light source selection unit, the output end of the SOA modulator is used to output a pulse light wave with a wavelength and time length corresponding to the optical fiber code to be identified, and the SOA modulator is electrically connected to the main control unit.

[0017] A multi-light source self-heating modulation method according to an embodiment of the second aspect of the present invention is applied to a multi-light source self-heating modulation module as described in any one of the first method embodiments of the present invention, comprising the following steps:

[0018] Determining a target pulse light source from the plurality of pulse light sources, and connecting the pulse control module to the target pulse light source using the light source selection unit;

[0019] Turning on the target pulse light source and determining the self-heating time of the light source based on the relationship between the temperature rise and the wavelength of the target pulse light source;

[0020] Temperature modulation is performed on the target pulse light source during the self-heating time of the light source to obtain a target wavelength pulse light wave, which is output by the light source selection unit to the pulse control unit. The target wavelength pulse light wave represents a pulse light wave of a wavelength corresponding to the optical fiber code to be identified.

[0021] Turning on the pulse control unit to receive the target wavelength pulse lightwave and modulate it to output a target duration pulse lightwave, wherein the target duration pulse lightwave represents a pulse lightwave of a wavelength and duration corresponding to the optical fiber code to be identified;

[0022] Turn off the pulse control unit and the target pulse light source.

[0023] The multi-light source self-heating modulation method according to the embodiment of the present invention has at least the following beneficial effects:

[0024] By executing the multi-light source self-heating modulation method of the embodiment of the present invention on the multi-light source self-heating modulation module of the embodiment of the present invention, one of the multiple pulse light sources, namely the target pulse light source, is selected by utilizing the light source selection unit and the operation is started. Based on the relationship between the temperature rise of the light source and the wavelength, the main control unit accurately calculates the self-heating time required to achieve the target wavelength pulse light source, and determines the connection time between the target pulse light source and the pulse control unit based on the self-heating time to ensure the generation of the target wavelength pulse light wave. After the self-heating time, the pulse control unit will further modulate to finally obtain the target wavelength and time pulse light wave. Therefore, for the multi-light source self-heating modulation module of the embodiment of the present invention, it relies on the self-heating of the pulse light source to change the wavelength of the emitted pulse light wave, and realizes the temperature modulation of the pulse light wave of different wavelengths by accurately calculating through the control unit. Compared with the temperature modulation device, the cost of the device itself is greatly reduced.

[0025] According to the computer-readable storage medium of the third aspect embodiment of the present invention, the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the multi-light source self-heating modulation method as described in the second aspect embodiment of the present invention.

[0026] It can be understood that the beneficial effects of the third aspect compared with the relevant technology are the same as the beneficial effects of the second aspect compared with the relevant technology. Please refer to the relevant description in the first aspect and no further details will be given here.

[0027] According to a fourth aspect of the present invention, a multi-light source self-heating modulation optical fiber coding and identification system includes:

[0028] The multi-light source self-heating modulation module as described in any one of the embodiments of the first aspect of the present invention;

[0029] A circulator, comprising a first port, a second port, and a third port, wherein the first port is connected to an output end of a pulse control unit of the multi-light source self-heating modulation module;

[0030] an optical fiber encoder connected to the second port;

[0031] a photoelectric collection unit, whose input end is connected to the third port, and the photoelectric collection unit is used to process the pulse light wave and output an electrical signal;

[0032] The analog-to-digital conversion unit has an input end electrically connected to the output end of the spectrum acquisition unit, and an output end electrically connected to the main control unit of the multi-light source self-heating modulation module.

[0033] The optical fiber coding and identification system with multi-light source self-heating modulation according to the embodiment of the present invention has at least the following beneficial effects:

[0034] Under the control of the main control unit, the multi-light source self-thermal modulation module transmits a pulsed lightwave of the required specific wavelength to the fiber code. The fiber code reflects the pulsed lightwave of the specific wavelength and transmits it back to the photoelectric acquisition unit and analog-to-digital conversion unit. After processing, it can achieve rapid identification of the fiber code. Furthermore, the multi-light source self-thermal modulation fiber code identification system of the present invention utilizes a multi-light source self-thermal modulation module that relies on pulsed light sources for self-heating, thereby reducing the overall cost of the system.

[0035] The optical fiber coding identification method for self-thermal modulation of multiple light sources according to the fifth embodiment of the present invention is applied to the optical fiber coding identification system for self-thermal modulation of multiple light sources as described in the fourth embodiment of the present invention, comprising the following steps:

[0036] The multi-light source self-heating modulation module outputs a pulse light wave with a wavelength and time length corresponding to the optical fiber code to the circulator, and then continues to transmit it to the optical fiber code;

[0037] The photoelectric collection unit receives the reflected light wave after the optical fiber code reflects the pulse light wave and performs photoelectric conversion processing to obtain an analog electrical signal;

[0038] The analog-to-digital conversion unit receives the analog electrical signal and performs analog-to-digital conversion processing to obtain a digital signal;

[0039] The main control unit receives and processes the digital signal to complete the identification of the optical fiber code.

[0040] The optical fiber coding identification method using multi-light source self-heating modulation according to an embodiment of the present invention has at least the following beneficial effects:

[0041] The optical fiber coding identification method of multi-light source self-thermal modulation of an embodiment of the present invention is applied to the optical fiber coding identification system of multi-light source self-thermal modulation. Under the operation of the main control unit, the multi-light source self-thermal modulation module sends the required pulse light wave of the specific wavelength to the optical fiber coding. The optical fiber coding reflects the pulse light wave of the specific wavelength and transmits it back to the photoelectric collection unit and the analog-to-digital conversion unit. After processing, the optical fiber coding can be quickly identified.

[0042] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0044] Figure 1This is a structural diagram of a multi-light source self-heating modulation optical fiber coding and identification system according to an embodiment of the present invention;

[0045] Figure 2 1 is a timing diagram of a multi-light source self-heating modulation module according to an embodiment of the present invention;

[0046] Figure 3 is a flow chart of a multi-light source self-heating modulation method according to an embodiment of the present invention;

[0047] Figure 4 This is a flow chart of a method for optical fiber coding identification using multi-light source self-thermal modulation according to an embodiment of the present invention.

[0048] Reference numerals:

[0049] Multi-light source self-heating modulation module 100; pulse light source 110; light source selection unit 120; pulse control unit 130; main control unit 140;

[0050] Circulator 210; fiber encoding 220; photoelectric collection unit 230; analog-to-digital conversion unit 240. DETAILED DESCRIPTION

[0051] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0052] In the description of the present invention, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0053] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0055] The technical solutions of the present invention will be described clearly and completely below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments.

[0056] Reference Figure 1 As shown, the multi-light source self-heating modulation module 100 provided by the embodiment of the present invention includes multiple pulse light sources 110, a light source selection unit 120, a pulse control unit 130, and a main control unit 140. Each pulse light source 110 self-heats as the operating time increases to change the wavelength; the multiple input ends of the light source selection unit 120 are respectively connected to the output ends of the multiple pulse light sources 110, and the light source selection unit 120 is used to select one of the multiple pulse light sources 110 for light wave output; the input end of the pulse control unit 130 is connected to the output end of the light source selection unit 120, and the output end is used to output a pulse light wave with a wavelength and time corresponding to the optical fiber code 220 to be identified; the main control unit 140 is electrically connected to the multiple pulse light sources 110, the light source selection unit 120, and the pulse control unit 130.

[0057] Specifically, refer to Figure 1 As shown in the figure, the dotted box represents the multi-light source self-heating modulation module 100 of an embodiment of the present invention. The main control unit 140 controls the switching of the multiple pulse light sources 110, the switching of the light source selection unit 120, and the switching of the pulse control unit 130. To obtain a pulse light wave with a target wavelength and time duration, the light source selection unit 120 is first connected to the target pulse light source among the multiple pulse light sources 110. The target pulse light source is then turned on to begin temperature self-heating modulation. After the required modulation duration is completed, a pulse light wave with the target wavelength is output to the pulse control unit 130. After modulation by the pulse control unit 130, a pulse light wave with the target wavelength and time duration is finally obtained and output to the corresponding fiber code 220 to be identified.

[0058] Further, refer to Figure 2 , Figure 2 This is a timing diagram of the multi-light source self-heating modulation module 100. The light source selection unit 120 utilizes an optical switch that enables the selection and convergence of multiple light sources. Because current technology requires a certain amount of time to open and close the optical switch, and because, for example, switching port 16 to port 1 takes longer than switching port 1 to port 2, a maximum stabilization time is required to ensure stability. In practice, this is typically 100ms. Therefore, whenever the light source selection unit 120 is switched to connect with multiple pulse light sources 110, the corresponding target pulse light source must wait for the maximum stabilization time before being turned on.

[0059] Continue to refer Figure 2The target pulse light source continues to heat up, and its internal heat collection will modulate the wavelength. The change pattern of its temperature and wavelength is 0.1nm / degree, that is, for every 1 degree increase in temperature, the wavelength increases by 0.1nm. Further according to calculations and actual tests, the corresponding relationship between self-heating time and wavelength is roughly: a wavelength change of 4nm requires 60ms of heat collection time. Therefore, the pulse light wave can be transmitted to the optical fiber code 220 to be identified only after the temperature heat collection completes the required self-heating time. At the same time, when the target pulse light source is working and generating heat, pulse light waves are actually continuously output. Since the wavelength is constantly changing and the continuously output pulse light waves are not what we need, the pulse control unit 130 is used to control the duration of the output pulse light waves. In practice, the maximum duration is generally 1000ns. That is, when the target pulse light source is continuously self-heating modulated, the pulse wavelength will reach the pulse control unit 130, but the pulse control unit 130 will not be turned on to output the pulse light wave. After the required temperature modulation duration is completed, the pulse control unit 130 will be turned on for a maximum duration of 1000ns to output the pulse light wave of the target wavelength and duration. It should be noted that because the time of 1000ns is very short, the wavelength change of the target pulse light source under self-heating modulation during this period can be ignored.

[0060] It should also be noted that in the temperature modulation of the target pulse light source, the wavelength change corresponding to its working self-heating time is very stable, and its error is small, and the error can basically be controlled to be less than 0.05nm. That is, in some embodiments, when temperature modulation is performed, the pulse control unit 130 can be turned on for further processing when the wavelength of the pulse light wave reaches the target pulse wavelength minus 0.05nm.

[0061] In this embodiment, the light source selection unit 120 is used to select one of the multiple pulse light sources 110, namely the target pulse light source, and start the operation. Based on the relationship between the temperature rise of the light source and the wavelength, the main control unit 140 accurately calculates the self-heating time required for the pulse light source to reach the target wavelength, and determines the connection time between the target pulse light source and the pulse control unit 130 based on the self-heating time to ensure the generation of the pulse light wave of the target wavelength. After the self-heating time, the pulse control unit 130 will further modulate to finally obtain the pulse light wave of the target wavelength and time. Therefore, for the multi-light source self-heating modulation module 100 of the embodiment of the present invention, it relies on the self-heating of the pulse light source 110 to change the wavelength of the emitted pulse light wave, and the temperature modulation of the pulse light wave of different wavelengths is achieved by accurately calculating through the control unit. Compared with the temperature modulation device used for temperature modulation, the cost of the device itself is greatly reduced.

[0062] In some embodiments, the light source selection unit 120 uses an SOA optical switch, multiple input ends of the SOA optical switch are respectively connected to the output ends of the multiple pulse light sources 110 , and the output end of the SOA optical switch is connected to the input end of the pulse control unit 130 .

[0063] Specifically, SOA optical switches utilize semiconductor optical amplifiers (SOA) to achieve switching functionality by varying the SOA's bias voltage. When the bias is reduced, there's no population inversion, resulting in absorption of optical signals. When the bias is increased, the input signal is amplified. Consequently, when the SOA is in both the absorption and amplification states, the on-off extinction ratio is high. The SOA is also easy to integrate and offers fast switching speeds, but is polarization-sensitive. In some embodiments, the SOA optical switch utilizes an N×N configuration, with multiple inputs and corresponding outputs. By configuring the SOA's ports, it can connect to a target pulse light source and output the corresponding target pulse lightwave.

[0064] In some embodiments, the light source selection unit 120 uses a wavelength division multiplexer, and multiple input ends of the wavelength division multiplexer are respectively connected to the output ends of multiple pulse light sources 110, the output end of the wavelength division multiplexer is connected to the input end of the pulse control unit 130, and the wavelength division multiplexer is electrically connected to the main control unit 140.

[0065] Specifically, a wavelength division multiplexer (WDM) combines two or more optical carrier signals of different wavelengths carrying various information and couples them into the same optical fiber for transmission. Upon reaching the receiving end, the different wavelengths are separated using some method. By utilizing a WDM, multiple target pulse light sources can be connected and the coupled pulse light waves are output. At the receiving end, the demultiplexing process is performed to obtain the corresponding multiple target pulse light waves.

[0066] It can be understood that using an optical switch to connect a target pulse light source alone can better perform temperature modulation to obtain a pulse light wave of the corresponding target wavelength. Therefore, the wavelength division multiplexer used in this embodiment is relatively more difficult to operate in practice. Therefore, the light source selection unit 120 preferably uses an optical switch, such as an SOA optical switch.

[0067] In some embodiments, the pulse control unit 130 uses an electro-optical modulator, the input end of the electro-optical modulator is connected to the output end of the light source selection unit 120, the output end of the electro-optical modulator is used to output a pulse light wave with a wavelength and time length corresponding to the optical fiber code 220 to be identified, and the electro-optical modulator is electrically connected to the main control unit 140.

[0068] Specifically, since the pulse control unit 130 needs to control the output pulse light wave at the nanosecond level, the electro-optic modulator used is actually used as a Q switch. It should be noted that the Q switch can quickly switch between very small or very high losses to the laser beam. This device is usually used in the laser resonator to realize active Q switching of the laser, which is a method of generating short, intense pulses with a pulse length in the nanosecond range. Q switches include acousto-optic Q switches, electro-optic Q switches, and passive Q switches. Specifically, the electro-optic Q switch needs to adopt an electro-optic modulator, which controls the power, phase and polarization of the laser beam through an electronic control signal. It usually contains one or two Pockels cells, and sometimes may also contain some other optical elements, such as a polarizer. Its working principle is the linear electro-optic effect (also known as the Pockels effect), that is, the electric field causes the refractive index change in the nonlinear crystal to be proportional to the intensity of the field.

[0069] Furthermore, in some embodiments, the AOM (Acousto-Optic Q-Switch) requires the use of an acousto-optic modulator (AOM), a device that uses an electronic drive signal to control the power, frequency, or spatial direction of a laser beam. It exploits the acousto-optic effect, whereby the mechanical oscillation of pressure through acoustic waves changes the refractive index. The key component of an AOM is a transparent crystal (or glass) through which light propagates. A piezoelectric transducer in contact with the crystal excites acoustic waves, which have a frequency on the order of 100 MHz.

[0070] In some embodiments, the pulse control unit 130 uses an SOA modulator, the input end of the SOA modulator is connected to the output end of the light source selection unit 120, the output end of the SOA modulator is used to output a pulse light wave with a wavelength and time length corresponding to the optical fiber code 220 to be identified, and the SOA modulator is electrically connected to the main control unit 140.

[0071] Specifically, a semiconductor optical amplifier (SOA) can also be used to output nanosecond-level pulse light waves. Specifically, a nanosecond-level SOA pulse driver is used to ensure that the SOA can operate within nanoseconds.

[0072] In addition, reference Figure 3 The embodiment of the present invention further provides a multi-light source self-heating modulation method, which is applied to a multi-light source self-heating modulation module 100 as any one of the embodiments of the present invention, and includes the following steps:

[0073] Determine a target pulse light source from the plurality of pulse light sources 110, and connect the pulse control module to the target pulse light source using the light source selection unit 120;

[0074] Turn on the target pulse light source and determine the self-heating time of the light source based on the relationship between the temperature rise and wavelength of the target pulse light source;

[0075] The target pulse light source is temperature-modulated under the self-heating time of the light source to obtain a target wavelength pulse light wave and output it to the pulse control unit 130 by the light source selection unit 120. The target wavelength pulse light wave represents a pulse light wave with a wavelength corresponding to the optical fiber code 220 to be identified;

[0076] Turn on the pulse control unit 130 to receive a target wavelength pulse light wave and modulate it to output a target duration pulse light wave, where the target duration pulse light wave represents a pulse light wave with a wavelength and duration corresponding to the optical fiber code 220 to be identified;

[0077] The pulse control unit 130 and the target pulse light source are turned off.

[0078] Specifically, refer to Figure 3 , which is a flow chart of the multi-light source self-heating modulation method according to an embodiment of the present invention. It should be noted that the multi-light source self-heating modulation module 100 according to the embodiment of the present application is used to implement the aforementioned multi-light source self-heating modulation method. The multi-light source self-heating modulation method according to the embodiment of the present application corresponds to the aforementioned multi-light source self-heating modulation module 100. For the specific processing process, please refer to the aforementioned multi-light source self-heating modulation module 100 and will not be further described here.

[0079] It can be understood that by executing the multi-light source self-heating modulation method of the embodiment of the present invention on the multi-light source self-heating modulation module 100 of the embodiment of the present invention, one of the multiple pulse light sources 110, i.e., the target pulse light source, is selected by utilizing the light source selection unit 120, and the operation is started. Based on the relationship between the light source temperature rise and the wavelength, the main control unit 140 accurately calculates the self-heating time required for the pulse light source to reach the target wavelength, and determines the connection time between the target pulse light source and the pulse control unit 130 based on the self-heating time to ensure the generation of the pulse light wave of the target wavelength. After the self-heating time, the pulse control unit 130 will further modulate to finally obtain the pulse light wave of the target wavelength and time. Therefore, for the multi-light source self-heating modulation module 100 of the embodiment of the present invention, it relies on the self-heating of the pulse light source 110 to change the wavelength of the emitted pulse light wave, and the temperature modulation of the pulse light wave of different wavelengths is achieved by accurately calculating the control unit. Compared with temperature modulation using a temperature modulation device, the cost of the device itself is greatly reduced.

[0080] In addition, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. The computer-executable instructions are executed by one or more control processors, which can enable the one or more control processors to execute a multi-light source self-heating modulation method in the above method embodiment, for example, to execute the above-described Figure 3 The function of the method in .

[0081] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a general hardware platform. Those skilled in the art can understand that all or part of the processes in the above embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above method. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0082] In addition, if Figure 1 As shown, an optical fiber coding and identification system for multi-light source self-thermal modulation provided by an embodiment of the present invention includes a multi-light source self-thermal modulation module 100 as described in any embodiment of the present invention, a circulator 210, an optical fiber code 220, and a photoelectric collection unit 230. The circulator 210 includes a first port, a second port, and a third port. The first port is connected to the output of the pulse control unit 130 of the multi-light source self-thermal modulation module 100; the optical fiber code 220 is connected to the second port; the input of the photoelectric collection unit 230 is connected to the third port, and the photoelectric collection unit 230 is used to process the pulse light wave and output an electrical signal; the input of the analog-to-digital conversion unit 240 is electrically connected to the output of the spectrum collection unit, and the output of the analog-to-digital conversion unit 240 is electrically connected to the main control unit 140 of the multi-light source self-thermal modulation module 100.

[0083] Specifically, refer to Figure 1 The main control unit 140 is used to control the multi-light source self-heating modulation module 100 to output a pulse light wave of target wavelength and time length, which is transmitted to the optical fiber code 220 to be identified through the circulator 210. The optical fiber code 220 reflects the pulse light wave to generate a reflected light wave. The reflected light wave is transmitted back to the circulator 210 and continues to be transmitted to the photoelectric collection unit 230 for photoelectric conversion to obtain an analog electrical signal, which is further transmitted to the analog-to-digital conversion unit 240 for analog-to-digital conversion, thereby converting the analog electrical signal into a digital signal, and transmitting it to the main control unit 140 for processing to complete the identification of the optical fiber code 220.

[0084] It can be understood that multiple optical fiber codes 220 can be set, or a network structure with multiple optical fiber codes 220 can be adopted. By performing different temperature modulation on multiple pulse light sources 110 in the multi-light source self-heating modulation module 100, multiple target pulse light waves can be obtained, thereby completing the one-to-one identification of multiple optical fiber codes 220.

[0085] It is understood that under the operation of the main control unit 140, the multi-light source self-thermal modulation module 100 transmits the required pulse lightwave of the specific wavelength to the fiber code 220. The fiber code 220 reflects the pulse lightwave of the specific wavelength and transmits it back to the photoelectric collection unit 230 and the analog-to-digital conversion unit 240. After processing, the fiber code 220 can be quickly identified. At the same time, the multi-light source self-thermal modulation fiber code identification system of the embodiment of the present invention uses the multi-light source self-thermal modulation module 100 that relies on the self-heating of the pulse light source 110, thereby reducing the overall cost of the system.

[0086] In addition, if Figure 4 As shown, a fiber coding identification method for multi-light source self-thermal modulation provided by an embodiment of the present invention is applied to a fiber coding identification system for multi-light source self-thermal modulation as an embodiment of the present invention, comprising the following steps:

[0087] The multi-light source self-heating modulation module 100 outputs a pulse light wave with a wavelength and time duration corresponding to the optical fiber code 220 to the circulator 210, and then continues to transmit it to the optical fiber code 220;

[0088] The photoelectric collection unit 230 receives the reflected light waves after the pulse light waves are reflected by the fiber code 220 and performs photoelectric conversion processing to obtain an analog electrical signal;

[0089] The analog-to-digital conversion unit 240 receives the analog electrical signal and performs analog-to-digital conversion processing to obtain a digital signal;

[0090] The main control unit 140 receives the digital signal and processes it to complete the recognition of the optical fiber code 220 .

[0091] Specifically, refer to Figure 4 , which is a flow chart of the optical fiber coding identification method for multi-light source self-thermal modulation according to an embodiment of the present invention. It should be noted that the optical fiber coding identification system for multi-light source self-thermal modulation according to the embodiment of the present application is used to implement the aforementioned optical fiber coding identification method for multi-light source self-thermal modulation. The optical fiber coding identification method for multi-light source self-thermal modulation according to the embodiment of the present application corresponds to the aforementioned optical fiber coding identification system for multi-light source self-thermal modulation. For the specific processing process, please refer to the aforementioned optical fiber coding identification system for multi-light source self-thermal modulation, which will not be described in detail here.

[0092] It can be understood that the optical fiber coding identification method of multi-light source self-thermal modulation of the embodiment of the present invention is applied to the optical fiber coding identification system of multi-light source self-thermal modulation. Under the operation of the main control unit 140, the multi-light source self-thermal modulation module 100 sends the required pulse light wave of the specific wavelength to the optical fiber coding 220, and the optical fiber coding 220 reflects the pulse light wave of the specific wavelength and transmits it back to the photoelectric collection unit 230 and the analog-to-digital conversion unit 240. After processing, the optical fiber coding 220 can be quickly identified.

[0093] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0094] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

[0095] Those skilled in the art will appreciate that all or some of the steps and systems in the method disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, and the computer-readable medium can include computer storage media (or non-transitory media) and communication media (or temporary media). As known to those skilled in the art, the term computer storage media is included in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data) and is volatile and non-volatile, removable, and non-removable. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory, or other memory technology, CD-ROM, digital versatile disks (DVD), or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage, or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically embodies computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0096] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. A multi-light source self-heating modulation module, characterized in that: include: A plurality of pulse light sources, each of which heats up to change wavelength as the operating time increases; a light source selection unit, wherein the plurality of input ends thereof are respectively connected to the output ends of the plurality of pulse light sources, and the light source selection unit is used to select one of the plurality of pulse light sources for light wave output; a pulse control unit, the input end of which is connected to the output end of the light source selection unit, and the output end of which is used to output a pulse light wave with a wavelength and a length corresponding to the optical fiber code to be identified; when the selected pulse light source is continuously self-heating, the pulse light wave reaches the pulse control unit via the light source selection unit, and the pulse control unit will not be turned on to output the light wave pulse. When the selected pulse light source completes the self-heating time required to reach the corresponding wavelength, the pulse control unit is turned on to output the pulse light wave with the corresponding wavelength and a length; The main control unit is electrically connected to the plurality of pulse light sources, the light source selection unit, and the pulse control unit respectively.

2. The multi-light source self-heating modulation module according to claim 1, characterized in that: The light source selection unit adopts an SOA optical switch, a plurality of input ends of the SOA optical switch are respectively connected to the output ends of the plurality of pulse light sources, and the output end of the SOA optical switch is connected to the input end of the pulse control unit.

3. The multi-light source self-heating modulation module according to claim 1, characterized in that: The light source selection unit adopts a wavelength division multiplexer, and the multiple input ends of the wavelength division multiplexer are respectively connected to the output ends of the multiple pulse light sources. The output end of the wavelength division multiplexer is connected to the input end of the pulse control unit, and the wavelength division multiplexer is electrically connected to the main control unit.

4. The multi-light source self-heating modulation module according to claim 1, characterized in that: The pulse control unit adopts an electro-optical modulator, the input end of the electro-optical modulator is connected to the output end of the light source selection unit, the output end of the electro-optical modulator is used to output a pulse light wave with a wavelength and time length corresponding to the optical fiber code to be identified, and the electro-optical modulator is electrically connected to the main control unit.

5. The multi-light source self-heating modulation module according to claim 1, characterized in that: The pulse control unit adopts an SOA modulator, the input end of the SOA modulator is connected to the output end of the light source selection unit, the output end of the SOA modulator is used to output a pulse light wave with a wavelength and time length corresponding to the optical fiber code to be identified, and the SOA modulator is electrically connected to the main control unit.

6. A multi-light source self-heating modulation method, applied to the multi-light source self-heating modulation module according to any one of claims 1 to 5, characterized in that: The following steps are involved: Determining a target pulse light source from the plurality of pulse light sources, and connecting the pulse control unit to the target pulse light source using the light source selection unit; Turning on the target pulse light source and determining the self-heating time of the light source based on the relationship between the temperature rise and the wavelength of the target pulse light source; Temperature modulation is performed on the target pulse light source during the self-heating time of the light source to obtain a target wavelength pulse light wave, which is output by the light source selection unit to the pulse control unit. The target wavelength pulse light wave represents a pulse light wave of a wavelength corresponding to the optical fiber code to be identified. Turning on the pulse control unit to receive the target wavelength pulse lightwave and modulate it to output a target duration pulse lightwave, wherein the target duration pulse lightwave represents a pulse lightwave of a wavelength and duration corresponding to the optical fiber code to be identified; Turn off the pulse control unit and the target pulse light source.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the multi-light source self-heating modulation method according to claim 6.

8. A multi-light source self-heating modulation optical fiber coding recognition system, characterized in that: include: The multi-light source self-heating modulation module according to any one of claims 1 to 5; A circulator, comprising a first port, a second port, and a third port, wherein the first port is connected to an output end of a pulse control unit of the multi-light source self-heating modulation module; an optical fiber encoder connected to the second port; a photoelectric collection unit, whose input end is connected to the third port, and the photoelectric collection unit is used to process the pulse light wave and output an electrical signal; The analog-to-digital conversion unit has an input end electrically connected to the output end of the photoelectric collection unit, and an output end electrically connected to the main control unit of the multi-light source self-heating modulation module.

9. A method for optical fiber coding identification of multi-light source self-thermal modulation, applied to the optical fiber coding identification system of multi-light source self-thermal modulation as claimed in claim 8, characterized in that: The following steps are involved: The multi-light source self-heating modulation module outputs a pulse light wave with a wavelength and time length corresponding to the optical fiber code to the circulator, and then continues to transmit it to the optical fiber code; The photoelectric collection unit receives the reflected light wave after the optical fiber code reflects the pulse light wave and performs photoelectric conversion processing to obtain an analog electrical signal; The analog-to-digital conversion unit receives the analog electrical signal and performs analog-to-digital conversion processing to obtain a digital signal; The main control unit receives and processes the digital signal to complete the identification of the optical fiber code.

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