Wireless cascade optical fiber amplifier and control method

Abstract

The invention discloses a wireless cascade optical fiber amplifier and a control method, and belongs to the technical field of sensors, the wireless cascade optical fiber amplifier comprises a shell with a light transmitting window, a circuit board arranged in the shell, a light emitting unit arranged on the circuit board, a light receiving unit arranged on the circuit board, an optical fiber interface arranged on the shell and a controller arranged on the circuit board, the light-emitting surface of the light-emitting unit directly faces the light-transmitting window; the light receiving surface of the light receiving unit directly faces the light transmitting window, and the light receiving unit is used for receiving light signals outside the shell through the light transmitting window; the optical fiber interface is electrically connected with the circuit board; the controller is electrically connected with the light emitting unit, the light receiving unit and the optical fiber interface, and the controller is configured to control the light emitting unit to emit an optical signal which is the same as the optical pulse emitted by the optical fiber interface in a normal state; and after the optical receiving unit receives the external optical signal, the optical fiber interface is controlled to emit optical pulses after a preset time interval. The technical effects of improving the stability and reliability of the cascade optical fiber amplifier and reducing the cost are achieved.

Description

Technical Field

[0001] This invention belongs to the field of sensor technology, and specifically relates to a wireless cascaded fiber optic amplifier and its control method. Background Technology

[0002] Fiber optic amplifiers, as key components in optical communication, directly amplify optical signals, enabling stable power amplification with minimal distortion. In automated production line environments, multiple fiber optic amplifiers are often installed side-by-side to achieve cascading and configuration information transmission. Cascading fiber optic amplifiers refer to connecting multiple fiber optic amplifiers in a specific manner to form a multi-stage amplification system, thereby improving the system's overall gain and output power. Due to the complexity of industrial production environments, fiber optic amplifiers require higher waterproof ratings to ensure stable operation in harsh conditions. In existing technologies, cascading fiber optic amplifiers is typically achieved through exposed terminals, relying mainly on waterproof gaskets and fasteners for sealing. In addition to waterproof gaskets, the connection between fiber optic amplifier terminals also requires a fastening device to achieve a sealing effect. In industrial environments with vibration, humidity, or other harsh conditions, the fastening device is prone to loosening due to vibration, creating gaps that allow moisture to seep in. Furthermore, waterproof connections require precise drilling and tightening operations, demanding high installation skill, increasing installation difficulty, maintenance costs, and manufacturing and assembly costs. Cascading fiber optic amplifiers also require multiple ports, increasing equipment complexity and potential points of failure.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above-mentioned technical problems. Summary of the Invention

[0004] The technical problem to be solved by this invention is the poor stability and reliability, and high cost of cascaded fiber amplifiers.

[0005] To address the aforementioned technical problems, this invention provides a wireless cascaded fiber optic amplifier. The wireless cascaded fiber optic amplifier includes a housing with a light-transmitting window, a circuit board disposed within the housing, a light-emitting unit disposed on the circuit board, a light-receiving unit disposed on the circuit board, a fiber optic interface disposed on the housing, and a controller disposed on the circuit board. The light-emitting surface of the light-emitting unit faces the light-transmitting window, and the light-emitting unit is used to emit light signals to the outside of the housing through the light-transmitting window. The light-receiving surface of the light-receiving unit faces the light-transmitting window, and the light-receiving unit is used to receive light signals from outside the housing through the light-transmitting window. The fiber optic interface is electrically connected to the circuit board. The controller is electrically connected to the light-emitting unit, the light-receiving unit, and the fiber optic interface, respectively. The controller is configured to, under normal conditions, control the light-emitting unit to emit light signals with the same light pulses as those emitted by the fiber optic interface; and, after the light-receiving unit receives an external light signal, control the fiber optic interface to emit light pulses after a preset time interval, so that the fiber optic emission pulses of adjacent amplifiers are staggered to achieve cascading.

[0006] Optionally, the wireless cascaded fiber optic amplifier further includes a sealing element, which is affixed to the light-transmitting window and is made of a transparent material.

[0007] Optionally, the light-emitting unit includes a light-emitting diode (LED) and a driving circuit electrically connected to the LED, the driving circuit being electrically connected to the circuit board.

[0008] Optionally, the optical receiving unit includes a photodiode PD and a receiving circuit electrically connected to the photodiode PD, and the receiving circuit is electrically connected to the circuit board.

[0009] Optionally, the light-emitting diode (LED) and the photodiode (PD) are coaxial and parallel to the surface of the circuit board, and the light-transmitting window is a plane perpendicular to the optical axis.

[0010] Optionally, the light-emitting unit and the light-receiving unit are arranged side by side, and the light-emitting surface of the light-emitting unit and the light-receiving surface of the light-receiving unit both face the light-transmitting window.

[0011] Optionally, the light-transmitting window includes a first window facing the light-emitting surface of the light-emitting unit and a second window facing the light-receiving surface of the light-receiving unit.

[0012] According to another aspect of the present invention, the present invention also provides a control method for a wireless cascaded fiber optic amplifier. The control method includes: acquiring a housing with a light-transmitting window, wherein a circuit board is disposed inside the housing, the circuit board is disposed with a light-emitting unit, a light-receiving unit, and a controller, the housing is provided with a fiber optic interface, and the light-emitting unit emits a light signal to the outside of the housing through the light-transmitting window, and the light-receiving unit receives the light signal from the outside of the housing through the light-transmitting window; under normal conditions, the controller controls the light-emitting unit to emit a light signal to the outside of the housing through the light-transmitting window that is the same as the light pulse emitted by the fiber optic interface; the light-receiving unit receives the external light signal from the housing through the light-transmitting window; after receiving the external light signal, the controller controls the fiber optic interface to emit a light pulse after a preset time interval, so that the fiber optic emission pulses of adjacent amplifiers are staggered to achieve cascading.

[0013] Optionally, the control method further includes: in data transmission mode, controlling the light-emitting unit to continuously send a specific optical signal sequence to trigger the adjacent amplifier to enter the data receiving state; or after the light receiving unit receives the specific optical signal sequence, causing the controller to enter the data receiving state to receive data information.

[0014] Optionally, the specific optical signal sequence is three consecutive identical optical pulses; the preset time is greater than or equal to 1 microsecond; during data transmission, a low-level short and high-level long encoding method is used to represent data 0, and a low-level long and high-level short encoding method is used to represent data 1.

[0015] Beneficial effects: This invention provides a wireless cascaded fiber optic amplifier. A circuit board is mounted inside a housing. A light-emitting unit is mounted on the circuit board, with its emitting surface facing a light-transmitting window. The light-emitting unit emits light signals through the light-transmitting window to the outside of the housing. A light-receiving unit is mounted on the circuit board, with its receiving surface facing the light-transmitting window. The light-receiving unit receives light signals from outside the housing through the light-transmitting window. A fiber optic interface is mounted on the housing and electrically connected to the circuit board. A controller is mounted on the circuit board and electrically connected to the light-emitting unit, the light-receiving unit, and the fiber optic interface. The controller is configured to, under normal conditions, control the light-emitting unit to emit light signals with the same light pulses as those emitted by the fiber optic interface. Furthermore, after the light-receiving unit receives an external light signal, it controls the fiber optic interface to emit light pulses at preset intervals, thus staggering the fiber optic pulses emitted by adjacent amplifiers to achieve cascading. By configuring the light-transmitting window, the light-emitting unit, and the light-receiving unit, wireless optical signal communication between adjacent amplifiers can be achieved. When an adjacent amplifier emits a light signal through its light-emitting unit, the light-receiving unit of this amplifier can receive that light signal. Simultaneously, the controller, based on the received optical signal, controls the fiber optic interface to emit optical pulses at preset intervals. This delayed triggering of the fiber optic interface pulses staggers the pulses emitted by adjacent amplifiers, avoiding potential signal interference. Furthermore, the use of wireless communication simplifies the system structure, reduces connection costs, and consequently improves the stability and reliability of the cascaded fiber optic amplifiers, while simultaneously reducing system costs. This achieves the technical effect of improving the stability and reliability of the cascaded fiber optic amplifiers and reducing costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a wireless cascaded fiber optic amplifier provided in an embodiment of the present invention.

[0018] Figure 2 This is a structural block diagram of a controller, light-emitting unit, light-receiving unit, and fiber optic interface in a wireless cascaded fiber optic amplifier provided for an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the upper-level sensor pulse signal and the lower-level sensor pulse signal in a wireless cascaded fiber optic amplifier provided in an embodiment of the present invention.

[0020] Figure 4A flowchart of a control method for a wireless cascaded fiber optic amplifier provided in an embodiment of the present invention. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] To enable those skilled in the art to better understand the solutions of this application, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] In the embodiments of this application, "at least one" refers to one or more; "multiple" refers to two or more. In the description of this application, the terms "first," "second," "third," etc., are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0024] In this specification, references such as "one embodiment" or "some embodiments" mean that one or more embodiments of this application include the specific features, structures, or characteristics described in connection with that embodiment. Therefore, the terms "comprising," "including," "having," and variations thereof in this specification all mean "including but not limited to," unless otherwise specifically emphasized. It should be noted that in the embodiments of this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.

[0025] It should be noted that, in the embodiments of the present invention, when a component is referred to as being "fixed to" another component, it can be directly on the other component or an intervening component may be present. When a component is considered to be "connected to" another component, it can be directly connected to the other component or an intervening component may be present simultaneously. When a component is considered to be "set on" another component, it can be directly set on the other component or an intervening component may be present simultaneously. Furthermore, in the embodiments of this application, "connection" can also be understood as an electrical connection; the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical components. The terms "vertical," "horizontal," "left," "right," and similar expressions used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.

[0026] This invention provides a wireless cascaded fiber optic amplifier; please refer to [link to relevant documentation]. Figure 1 and Figure 3 As shown, Figure 1 This is a schematic diagram of the structure of a wireless cascaded fiber optic amplifier provided in an embodiment of the present invention. Figure 2 This is a structural block diagram of a controller, light-emitting unit, light-receiving unit, and fiber optic interface in a wireless cascaded fiber optic amplifier provided by an embodiment of the present invention. Figure 3 This is a schematic diagram of the upper-level sensor pulse signal and the lower-level sensor pulse signal in a wireless cascaded fiber optic amplifier provided in an embodiment of the present invention. This invention provides a wireless cascaded fiber optic amplifier comprising a housing 1, a circuit board, a light-emitting unit 3, a light-receiving unit 4, a fiber optic interface 12, and a controller 5. The housing 1 has a light-transmitting window 11. The circuit board is disposed inside the housing 1. The light-emitting unit 3 is disposed on the circuit board, with its light-emitting surface facing the light-transmitting window 11. The light-emitting unit 3 is used to emit light signals to the outside of the housing 1 through the light-transmitting window 11. The light-receiving unit 4 is disposed on the circuit board, with its light-receiving surface facing the light-transmitting window 11. The light-receiving unit 4 is used to receive light signals from outside the housing 1 through the light-transmitting window 11. The fiber optic interface 12 is disposed on the housing 1 and electrically connected to the circuit board. The controller 5 is disposed on the circuit board and electrically connected to the light-emitting unit 3, the light-receiving unit 4, and the fiber optic interface 12. The controller 5 is configured to, under normal conditions, control the light-emitting unit 3 to emit light signals with the same light pulses as those emitted by the fiber optic interface 12; and, after the light-receiving unit 4 receives external light signals, control the fiber optic interface 12 to emit light pulses at preset intervals, so that the fiber optic emission pulses of adjacent amplifiers are staggered to achieve cascading.

[0027] The light-transmitting window 11 on the housing 1 can be made of highly transparent, wear-resistant glass or plexiglass, enabling efficient transmission of light signals. The light-transmitting window 11 can be located on one or more sides of the housing 1 to achieve multi-directional light signal transmission and reception. A heat dissipation structure, such as a heat sink or cooling fan, can also be installed inside the housing 1 to keep the internal electronic components at normal operating temperatures. The circuit board can adopt a multi-layer PCB configuration, ensuring good electromagnetic compatibility and signal integrity. The light-emitting unit 3 and the light-receiving unit 4 can be arranged on the circuit board near the light-transmitting window 11, enabling efficient transmission and reception of light signals. The controller 5 can be located in the central area of ​​the circuit board, surrounded by matching peripheral circuits, such as power management circuits and signal conditioning circuits.

[0028] The light-emitting unit 3 can be an infrared LED or laser diode capable of emitting a specific wavelength. A focusing lens can also be configured at the front end of the light-emitting unit 3 to enhance the directionality and transmission distance of the optical signal. The optical receiving unit 4 can be a high-sensitivity PIN photodiode or avalanche photodiode, used in conjunction with a transimpedance amplifier circuit to detect weak optical signals and convert them into electrical signals. A filter can also be installed at the front end of the optical receiving unit 4 to filter ambient light interference and improve the signal-to-noise ratio of the received signal. The fiber optic interface 12 can be a standard interface type, supporting single-mode or multimode fiber connections. The fiber optic interface 12 can integrate a photoelectric conversion module to convert electrical signals into optical signals, or vice versa.

[0029] In normal operation, controller 5 controls the light-emitting unit 3 to emit an optical signal identical to the optical pulse emitted by the fiber optic interface 12, maintaining signal consistency. This allows adjacent amplifiers to determine their current operating status by observing the optical signal. When the optical receiving unit 4 receives an external optical signal, controller 5 starts a timer, controlling the fiber optic interface 12 to emit an optical pulse after a preset interval. The preset interval can be adjusted via a DIP switch or software configuration to adapt to different cascading requirements. Controller 5 can automatically adjust the emission power of the light-emitting unit 3 and the emission timing of the fiber optic interface 12 based on the intensity and frequency characteristics of the received optical signal to optimize cascading performance. Controller 5 can also monitor the operating status of the light-emitting unit 3, optical receiving unit 4, and fiber optic interface 12. When an anomaly is detected, it can switch to standby mode or issue an alarm signal. When multiple wirelessly cascaded fiber optic amplifiers are arranged at a certain interval, they can communicate and coordinate via wireless optical signals. For example, the first amplifier emits an optical pulse through fiber optic interface 12 and simultaneously emits the same optical signal through light-emitting unit 3. After receiving the optical signal emitted by the first amplifier, the optical receiving unit 4 of the second amplifier controls the fiber optic interface 12 to emit an optical pulse after a preset interval, and simultaneously emits the same optical signal through light-emitting unit 3. This process continues, with the third and fourth amplifiers operating according to the same logic to form a timing-staggered cascaded system. This avoids signal interference caused by adjacent amplifiers emitting optical pulses simultaneously, improving system stability and reliability. Furthermore, the use of wireless communication simplifies the physical connection structure of the system, reducing installation and maintenance costs.

[0030] In this embodiment, a circuit board is installed inside the housing 1. A light-emitting unit 3 is mounted on the circuit board, with its emitting surface facing the light-transmitting window 11. The light-emitting unit 3 emits light signals to the outside of the housing 1 through the light-transmitting window 11. A light-receiving unit 4 is mounted on the circuit board, with its receiving surface facing the light-transmitting window 11. The light-receiving unit 4 receives light signals from outside the housing 1 through the light-transmitting window 11. An optical fiber interface 12 is mounted on the housing 1 and electrically connected to the circuit board. A controller 5 is mounted on the circuit board and electrically connected to the light-emitting unit 3, the light-receiving unit 4, and the optical fiber interface 12. The controller 5 is configured to, under normal conditions, control the light-emitting unit 3 to emit light signals identical to the light pulse emitted by the optical fiber interface 12, and, after the light-receiving unit 4 receives an external light signal, control the optical fiber interface 12 to emit light pulses at preset intervals, thereby achieving cascading by staggering the optical fiber emission pulses of adjacent amplifiers. Thus, by setting up the light-transmitting window 11, the light-emitting unit 3, and the light-receiving unit 4, wireless optical signal communication between adjacent amplifiers can be achieved. When an adjacent amplifier emits an optical signal through the light-emitting unit 3, the optical receiving unit 4 of this amplifier can receive the optical signal. Simultaneously, the controller 5, based on the received optical signal, controls the fiber optic interface 12 to emit an optical pulse after a preset time interval. This delays the triggering of the fiber optic interface 12's pulse emission, staggering the fiber optic pulses emitted by adjacent amplifiers to avoid potential signal interference. Furthermore, the use of wireless communication simplifies the system structure, reduces connection costs, and consequently improves the stability and reliability of the cascaded fiber optic amplifiers, while also reducing system costs. This achieves the technical effect of improving the stability and reliability of the cascaded fiber optic amplifiers and reducing costs.

[0031] As one implementation method, the wireless cascaded fiber optic amplifier provided in this embodiment of the invention also includes a sealing element. The sealing element is disposed on the light-transmitting window 11 and is affixed to the light-transmitting window 11. The sealing element is made of a transparent material. For example, the transparent sealing element can be made of transparent silicone, transparent epoxy resin, or transparent plexiglass. The sealing element and the light-transmitting window 11 can be bonded together with a transparent adhesive to form a sealed structure. The transparent sealing element can improve the sealing performance of the housing 1, preventing external environmental factors such as dust and moisture from entering the interior of the housing 1, thereby protecting the internal electronic components such as the circuit board, light-emitting unit 3, light-receiving unit 4, and controller 5 from contamination and corrosion. Furthermore, the transparent sealing element can protect the light-transmitting window 11, preventing it from being scratched or damaged during use, and extending the service life of the light-transmitting window 11. By setting a transparent sealing element on the light-transmitting window 11, the protection level of the wireless cascaded fiber optic amplifier can be effectively improved, enabling it to work stably under harsher environmental conditions, thereby improving the reliability and service life of the device.

[0032] In some embodiments, the light-emitting unit 3 includes a light-emitting diode (LED) and a driving circuit. The driving circuit is electrically connected to the LED and to a circuit board. The LED can be an infrared LED of a certain wavelength, with its emitting surface facing the light-transmitting window 11. The driving circuit may include components such as a current-limiting resistor, a voltage regulator circuit, and a pulse modulation circuit to provide a stable operating current for the LED and control its light-emitting timing. The driving circuit is electrically connected to the controller 5 and receives control signals from the controller 5. When the controller 5 needs to send a light signal, it sends a corresponding control command to the driving circuit. The driving circuit controls the switching state and luminous intensity of the LED according to the command to generate a specific light pulse signal. The luminous intensity of the LED can be precisely adjusted by the driving circuit to adapt to different communication distance requirements. For example, in short-distance communication, the luminous intensity of the LED can be reduced to reduce power consumption; in long-distance communication, the luminous intensity of the LED can be increased so that the signal can be detected by a distant receiver. By using LEDs and driving circuits in combination, the light-emitting unit 3 can generate stable and reliable light signals, improving the quality of wireless communication links.

[0033] In some embodiments, the light receiving unit 4 includes a photodiode PD and a receiving circuit. The receiving circuit is electrically connected to the photodiode PD and to a circuit board. The light receiving unit 4 can be mounted on a circuit board and includes the photodiode PD and the receiving circuit. For example, the photodiode PD can be a silicon-based PIN photodiode or an avalanche photodiode, with its light-receiving surface facing the light-transmitting window 11. The receiving circuit includes components such as a transimpedance amplifier, a filter circuit, and a signal shaping circuit, used to convert the light signal received by the photodiode PD into an electrical signal, and amplify and process it. The receiving circuit is electrically connected to the controller 5 and transmits the processed electrical signal to the controller 5 for analysis and judgment. For example, when an external light signal shines on the photodiode PD through the light-transmitting window 11, the PD generates a photocurrent proportional to the light intensity. The weak photocurrent is amplified by the transimpedance amplifier of the receiving circuit and converted into a voltage signal. Then, the filter circuit filters out the interference of ambient light and circuit noise, and the signal shaping circuit converts the analog signal into a digital signal, which is finally output to the controller 5. The receiving circuit can possess high sensitivity and a wide dynamic range, enabling it to detect weak light signals without saturating under strong light. An optical filter can be installed at the front end of the photodiode (PD) to allow only light within a specific wavelength range to pass through, thereby improving the signal-to-noise ratio. This allows the optical receiving unit 4 to accurately identify signals from other amplifier light-emitting units 3 in complex lighting environments, reducing the possibility of false triggering. Through the coordinated use of the photodiode (PD) and the receiving circuit, the optical receiving unit 4 can efficiently and accurately receive external light signals, providing reliable information input to the controller 5 and improving the quality and stability of the wireless communication link.

[0034] In some embodiments, the optical axes of the light-emitting diode (LED) and the photodiode (PD) are coaxial, and both the optical axes of the LED and the PD are parallel to the surface of the circuit board. The light-transmitting window 11 is a plane perpendicular to the optical axis. The LED and the PD can be mounted on the circuit board respectively, with their optical axes coaxial and parallel to the surface of the circuit board. The light-transmitting window 11 being a plane perpendicular to the optical axis allows the light signal to pass perpendicularly through the light-transmitting window 11. That is, after the optical axes of the LED 31 and the photodiode PD 41 are set coaxially, the transmitting and receiving optical paths will coincide in space, forming a bidirectional optical channel. When two wireless cascaded fiber optic amplifiers are placed opposite each other, the optical channels of the two wireless cascaded fiber optic amplifiers can be naturally aligned without the need for complex optical alignment mechanisms, thus simplifying the system installation and debugging process. At the same time, the optical axis being parallel to the surface of the circuit board allows the LED and the PD to be surface-mount packaged, facilitating automated mounting on the circuit board, reducing manufacturing costs, and saving circuit board space, making the entire device more compact. Furthermore, by aligning the light-transmitting window 11 perpendicular to the optical axis, reflection and refraction losses of the optical signal as it passes through the window 11 can be minimized, thereby improving the transmission efficiency of the optical signal. In practical applications, when multiple wireless cascaded fiber optic amplifiers are arranged at a certain interval, the light-emitting units 3 and light-receiving units 4 of the multiple wireless cascaded fiber optic amplifiers can form a stable optical link.

[0035] In some embodiments, the light-emitting unit 3 and the light-receiving unit 4 are arranged side by side, with the light-emitting surface of the light-emitting unit 3 and the light-receiving surface of the light-receiving unit 4 both facing the light-transmitting window 11. This allows the light-emitting unit 3 and the light-receiving unit 4 to share a single light-transmitting window 11, simplifying the structure of the housing 1 and reducing manufacturing difficulty and cost. It also facilitates the separate configuration of a focusing lens for the light-emitting unit 3 to enhance the directionality of the light signal, and the configuration of a filter for the light-receiving unit 4 to improve the signal-to-noise ratio. Furthermore, since the light-emitting unit 3 generates heat during operation, separating it from the light-receiving unit 4 can prevent the heat from affecting the light-receiving unit 4, thus improving the stability of the system.

[0036] In some embodiments, the light-transmitting window 11 includes a first window and a second window. The first window faces the light-emitting surface of the light-emitting unit 3, and the second window faces the light-receiving surface of the light-receiving unit 4. The first window, facing the light-emitting surface of the light-emitting unit 3, can be used to emit light signals; the second window, facing the light-receiving surface of the light-receiving unit 4, can be used to receive light signals. For example, the first window can be made of a material with high light transmittance and treated with anti-reflection to maximize the emission efficiency of the light signal; the second window can be made of a material with specific wavelength selectivity or configured with a filter to improve the signal-to-noise ratio of the received signal. The separation of the first and second windows can effectively reduce the possibility of the light signal emitted by the light-emitting unit 3 directly entering the light-receiving unit 4, avoiding self-interference. At the same time, the independent first and second windows allow the light-emitting unit 3 and the light-receiving unit 4 to optimize their respective positions and angles to obtain the best emission and reception effects. For example, the light-emitting unit 3 can be slightly tilted to emit the light signal in a specific direction; the light-receiving unit 4 can also adjust its angle to receive the light signal from the specific direction in the best way.

[0037] To provide a detailed description of the control method for a wireless cascaded fiber optic amplifier provided by the present invention, the above embodiment 1 provides a detailed description of a wireless cascaded fiber optic amplifier. Based on the same inventive concept, this application also provides a control method for a wireless cascaded fiber optic amplifier.

[0038] Please see Figure 4 , Figure 4 This is a flowchart illustrating a control method for a wireless cascaded fiber optic amplifier according to an embodiment of the present invention. The control method for a wireless cascaded fiber optic amplifier provided by this embodiment of the present invention includes the following steps: Step S100: Obtain a housing 1 with a light-transmitting window 11. The housing 1 is equipped with a circuit board, and the circuit board is equipped with a light-emitting unit 3, a light-receiving unit 4 and a controller 5. The housing 1 is equipped with an optical fiber interface 12, and the light-emitting unit 3 emits light signals to the outside of the housing 1 through the light-transmitting window 11, and the light-receiving unit 4 receives light signals from the outside of the housing 1 through the light-transmitting window 11. Specifically, the light-transmitting window 11 allows light signals to be freely transmitted between the inside and outside of the housing 1, providing a channel for wireless optical communication. The arrangement of the light-emitting unit 3 and the light-receiving unit 4 enables the amplifier to transmit and receive light signals. The arrangement of the controller 5 enables the amplifier to make corresponding control according to the received signals. The arrangement of the fiber optic interface 12 enables the amplifier to connect to an external fiber optic network.

[0039] Step S200: Under normal conditions, the controller 5 controls the light-emitting unit 3 to emit a light signal that is the same as the light pulse emitted by the optical fiber interface 12 through the light-transmitting window 11 to the outside of the housing 1. Specifically, the controller 5 can be connected to the driving circuit of the light-emitting unit 3 and the control circuit of the fiber optic interface 12 via digital output ports. When an optical signal needs to be emitted, the controller 5 simultaneously outputs the same digital signal to both ports, driving the light-emitting unit 3 and the fiber optic interface 12 to generate the same optical pulse. To ensure complete synchronization of the optical signals of the two channels, the controller 5 can use a unified clock source and signal generation circuit to eliminate possible timing differences. By emitting the same optical signal as the fiber optic interface 12 through the light-emitting unit 3, adjacent amplifiers can obtain the internal state of their amplifier, such as the operating state of the fiber optic interface 12, through their optical receiving units 4. Furthermore, the synchronous emission method helps improve the consistency and predictability of the system state. When multiple amplifiers form a cascaded network, each amplifier can obtain the operating state of its adjacent amplifiers and make corresponding control decisions. Since the light-emitting unit 3 and the fiber optic interface 12 emit the exact same signal, adjacent amplifiers only need to monitor one signal mode, eliminating the need for complex signal analysis and state judgment, which also helps reduce the complexity and error probability of the system.

[0040] Step S300: The light receiving unit 4 receives the external light signal of the housing 1 through the light-transmitting window 11; Specifically, the optical receiving unit 4 receives optical signals from outside the housing 1 through the light-transmitting window 11. The optical receiving unit 4 converts the received optical signals into electrical signals and transmits them to the controller 5 for processing and analysis. Compared to traditional wired connections, wireless optical communication simplifies the system structure and reduces connection costs. For example, optical signals can directly penetrate the air for transmission, eliminating the need for complex physical connections and reducing components such as connectors, cables, and interface circuits, thus lowering system complexity and cost.

[0041] In step S400, after receiving the external optical signal, the controller 5 controls the optical fiber interface 12 to emit optical pulses after a preset time interval, so that the optical fiber emission pulses of adjacent amplifiers are staggered to achieve cascading.

[0042] Specifically, based on the external optical signal received by the optical receiving unit 4, the controller 5 controls the fiber optic interface 12 to delay the transmission of optical pulses by a preset time. This causes the fiber optic transmission pulses of adjacent amplifiers to be staggered in time, avoiding signal interference and conflicts that may occur due to simultaneous transmission, thus achieving a stable and reliable cascading effect. Please refer to [link to relevant documentation]. Figure 3A trigger delay 72 exists between the upper-level sensor pulse signal 7 and the lower-level sensor pulse signal 71. That is, after the optical receiving unit 4 receives an external optical signal and converts it into an electrical signal, the controller 5 first verifies the signal to determine if it is a valid control signal rather than interference or noise. Verification can be based on the signal's waveform characteristics, encoding format, or a specific sequence pattern. After determining the signal is valid, the controller 5 can start an internal timer to time a preset delay. The preset time can be set according to actual requirements, such as within a few microseconds to a few milliseconds. During the delay, the controller 5 can perform tasks such as status monitoring, data processing, or preparing transmission parameters. After the delay time is reached, the controller 5 can send a control signal to the fiber optic interface 12 to trigger its transmission of an optical pulse. The parameters of the optical pulse, such as wavelength, power, pulse width, and encoding method, can be specifically configured according to actual application requirements. Simultaneously, the controller 5 can also control the emitting unit 3 to emit the same optical signal, improving the consistency of the system state. By controlling the fiber optic transmission pulses of adjacent amplifiers to be staggered in time, signal interference and collisions can be effectively avoided. In fiber optic networks, simultaneous transmission of optical pulses by multiple amplifiers can lead to signal overlap, excessive power, or waveform distortion, affecting system operation. Delay control mechanisms, using time-division multiplexing, provide each amplifier with an independent transmission time window, reducing the possibility of interference. Furthermore, this delay control mechanism enables collaborative operation between amplifiers; each amplifier can automatically adjust its transmission timing based on received external signals, forming an ordered cascaded system that can adapt to different network topologies and operating conditions, improving system flexibility and adaptability. Wireless communication further simplifies system structure and reduces connection costs.

[0043] The control method for a wireless cascaded fiber optic amplifier provided in this embodiment of the invention further includes, in data transmission mode, controlling the light-emitting unit 3 to continuously send a specific optical signal sequence via the controller 5 to trigger adjacent amplifiers to enter a data receiving state; or, after the optical receiving unit 4 receives the specific optical signal sequence, causing the controller 5 to enter a data receiving state to receive data information. The specific optical signal sequence is three consecutive identical optical pulses; the preset time is greater than or equal to 1 microsecond; during data transmission, a low-level short, high-level long encoding method is used to represent data 0, and a low-level long, high-level short encoding method is used to represent data 1.

[0044] Specifically, when data needs to be transmitted, controller 5 can control the light-emitting unit 3 to continuously send three identical light pulses as a specific trigger sequence. After the adjacent amplifier's optical receiving unit 4 receives this sequence, its controller 5 will recognize it as the start signal of data transmission and automatically enter the data receiving state, ready to receive subsequent data information. During data transmission, specific encoding methods can be used to represent binary data, such as using a low-level short, high-level long encoding method for data 0, and a low-level long, high-level short encoding method for data 1. This provides high self-synchronization capability and good anti-interference performance, making it suitable for use in optical communication environments. A preset time of greater than or equal to 1 microsecond ensures sufficient time interval between the fiber optic pulses emitted by adjacent amplifiers to avoid signal interference. That is, the specific optical signal sequence consists of three identical light pulses, such as each pulse width of 1 microsecond, a pulse interval of 2 microseconds, and a total sequence duration of 7 microseconds, improving recognizability and anti-interference performance, and making it less likely to be confused with normal control signals or environmental interference. When the sequence is detected, controller 5 can automatically switch to data receiving mode, ready to receive subsequent data information. The data encoding method is as follows: the low level of data 0 lasts for 1 microsecond and the high level lasts for 3 microseconds; the low level of data 1 lasts for 3 microseconds and the high level lasts for 1 microsecond, so that the total duration of each bit is the same, which is convenient for synchronization and decoding.

[0045] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A wireless cascaded fiber optic amplifier, characterized in that, The wireless cascaded fiber optic amplifier includes a housing with a light-transmitting window, a circuit board disposed within the housing, a light-emitting unit disposed on the circuit board, a light-receiving unit disposed on the circuit board, a fiber optic interface disposed on the housing, and a controller disposed on the circuit board. The light-emitting surface of the light-emitting unit faces the light-transmitting window, and the light-emitting unit is used to emit light signals to the outside of the housing through the light-transmitting window; the light-receiving surface of the light-receiving unit faces the light-transmitting window, and the light-receiving unit is used to receive light signals from outside the housing through the light-transmitting window. The optical fiber interface is electrically connected to the circuit board; the controller is electrically connected to the light-emitting unit, the light-receiving unit and the optical fiber interface respectively, and the controller is configured to control the light-emitting unit to emit an optical signal that is the same as the optical pulse emitted by the optical fiber interface under normal conditions; And after the optical receiving unit receives an external optical signal, it controls the optical fiber interface to emit optical pulses after a preset time interval, so that the optical fiber emission pulses of adjacent amplifiers are staggered to achieve cascading.

2. The wireless cascaded fiber optic amplifier according to claim 1, characterized in that, The wireless cascaded fiber optic amplifier also includes a sealing element, which is affixed to the light-transmitting window and is made of a transparent material.

3. The wireless cascaded fiber optic amplifier according to claim 1, characterized in that, The light-emitting unit includes a light-emitting diode (LED) and a driving circuit electrically connected to the LED, and the driving circuit is electrically connected to the circuit board.

4. The wireless cascaded fiber optic amplifier according to claim 3, characterized in that, The optical receiving unit includes a photodiode PD and a receiving circuit electrically connected to the photodiode PD, and the receiving circuit is electrically connected to the circuit board.

5. The wireless cascaded fiber optic amplifier according to claim 4, characterized in that, The light-emitting diode (LED) and the photodiode (PD) are coaxial and parallel to the surface of the circuit board, and the light-transmitting window is a plane perpendicular to the optical axis.

6. The wireless cascaded fiber optic amplifier according to claim 1, characterized in that, The light-emitting unit and the light-receiving unit are arranged side by side, and the light-emitting surface of the light-emitting unit and the light-receiving surface of the light-receiving unit both face the light-transmitting window.

7. The wireless cascaded fiber optic amplifier according to claim 1, characterized in that, The light-transmitting window includes a first window facing the light-emitting surface of the light-emitting unit and a second window facing the light-receiving surface of the light-receiving unit.

8. A control method for a wireless cascaded fiber optic amplifier, characterized in that, The control method includes: A housing with a light-transmitting window is obtained. A circuit board is provided inside the housing. The circuit board is provided with a light-emitting unit, a light-receiving unit and a controller. The housing is provided with an optical fiber interface. The light-emitting unit emits light signals to the outside of the housing through the light-transmitting window, and the light-receiving unit receives light signals from the outside of the housing through the light-transmitting window. Under normal conditions, the controller controls the light-emitting unit to emit a light signal that is the same as the light pulse emitted by the optical fiber interface through the light-transmitting window to the outside of the housing. The light receiving unit receives external light signals from the housing through the light-transmitting window; Upon receiving the external optical signal, the controller controls the optical fiber interface to emit optical pulses at preset intervals, thereby staggering the optical fiber emission pulses of adjacent amplifiers to achieve cascading.

9. The control method for the wireless cascaded fiber optic amplifier according to claim 8, characterized in that, The control method further includes: in data transmission mode, controlling the light-emitting unit to continuously send a specific optical signal sequence to trigger the adjacent amplifier to enter the data receiving state; or after the light receiving unit receives the specific optical signal sequence, causing the controller to enter the data receiving state to receive data information.

10. The control method for the wireless cascaded fiber optic amplifier according to claim 9, characterized in that, The specific optical signal sequence consists of three consecutive identical optical pulses; the preset time is greater than or equal to 1 microsecond; during data transmission, a low-level short and high-level long encoding method is used to represent data 0, and a low-level long and high-level short encoding method is used to represent data 1.

Images