Optical fiber performance detection system

Abstract

To provide an optical fiber performance detection system including a first optical fiber detection device and a second optical fiber detection device. [Solution] An optical fiber performance detection system 100 includes a first optical fiber detection device 110 and a second optical fiber detection device 120, wherein the first optical fiber detection device 110 is externally connected to a first position of the main optical fiber 11 and provides a first optical signal OS1 having a first wavelength to be transmitted on the main optical fiber 11. The first wavelength is different from the wavelength of the main optical signal SS transmitted on the main optical fiber 11. The second optical fiber detection device 120 is externally connected to a second position of the main optical fiber 11 and detects the first optical signal OS1 transmitted on the main optical fiber, and in response to the determination that the first optical signal OS1 transmitted on the main optical fiber 11 is not detected, it determines that the main optical fiber 11 is faulty.

Description

Technical Field

[0001] The present invention relates to an optical fiber detection system, and particularly to an optical fiber performance detection system.

Background Art

[0002] Conventional optical switches detect the optical path by backward scattered light. This method not only requires consuming a part of the output of the communication transmission signal (for example, 5%) to detect the state of the optical path (for example, due to the occurrence of a failure, the signal cannot be used for transmission), but may also cause misjudgment of monitoring data in the case of the dropout of the optical fiber connector plug or the like.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In the prior art, if the light intensity is sufficiently large, there may be a false recognition and the optical path switching may not be executed.

Means for Solving the Problems

[0004] In view of this, the present invention provides an optical fiber performance detection system that can be used to solve the above technical problems.

[0005] In an embodiment of the present invention, an optical fiber performance detection system including a first optical fiber detection device and a second optical fiber detection device is provided. The first optical fiber detection device is externally connected to a first position of the main optical fiber and provided to transmit a first optical signal having a first wavelength onto the main optical fiber, and the first wavelength is different from the wavelength of the main optical signal transmitted on the main optical fiber. The second optical fiber detection device is externally connected to a second position of the main optical fiber and detects the first optical signal transmitted on the main optical fiber. The second optical fiber detection device is configured to determine that the main optical fiber is faulty in response to a determination that the first optical signal transmitted on the main optical fiber has not been detected. [Effects of the Invention]

[0006] Based on the above, the optical fiber performance detection system provided in the embodiment of the present invention detects the state of the main optical fiber by connecting a first optical fiber detection device and a second optical fiber detection device by external connection to the first and second positions of the main optical fiber, respectively. [Brief explanation of the drawing]

[0007] [Figure 1] This is a schematic diagram of an optical fiber performance detection system drawn based on the first embodiment of the present invention. [Figure 2] This is a schematic diagram of the optical fiber performance detection system, drawn based on Figure 1. [Figure 3] This is a schematic diagram of an optical fiber performance detection system drawn based on a second embodiment of the present invention. [Figure 4] This is a schematic diagram, based on Figure 3, showing how the network management center manages multiple network structures. [Modes for carrying out the invention]

[0008] Referring to Figure 1, this is a schematic diagram of an optical fiber performance detection system drawn according to a first embodiment of the present invention. In Figure 1, the optical fiber performance detection system 100 includes a first optical fiber detection device 110 and a second optical fiber detection device 120.

[0009] In this embodiment, the first optical fiber detection device 110 is externally connected to a first position of the main optical fiber 11 and provides a first optical signal OS1 having a first wavelength to be transmitted over the main optical fiber 11, the first wavelength being different from the wavelength of the main optical signal SS transmitted over the main optical fiber 11.

[0010] In one embodiment, the first optical fiber detection device 110 includes a light source 112 and a demultiplexer 111. The light source 112 emits a first optical signal OS1 having a first wavelength. The demultiplexer 111 is coupled to the light source 112 and the main optical fiber 11 and is used to guide the first optical signal OS1 emitted by the light source 112 to be transmitted into the main optical fiber 11.

[0011] In embodiments of the present invention, each light source mentioned below can be, for example, an element that provides various optical signals, and is not limited to, a laser light source (e.g., a laser diode) capable of providing laser light. Furthermore, each optical sensor mentioned below can be, for example, any detection element capable of detecting optical signals, and is not limited to, a photodetector capable of detecting the above-mentioned laser light.

[0012] In embodiments of the present invention, the first optical fiber detection device 110 may incorporate a power supply (e.g., a battery) to provide the power necessary for transmitting the first optical signal OS1. In other words, when the first optical fiber detection device 110 is externally connected to a first position of the main optical fiber 11, the first optical fiber detection device 110 can transmit the first optical signal OS1 without requiring external power, but is not limited to this.

[0013] In Figure 1, the second optical fiber detection device 120 is externally connected to the second position of the main optical fiber 11 and is configured to detect the first optical signal OS1 transmitted over the main optical fiber 11. The second optical fiber detection device 120 is configured to determine that the main optical fiber 11 is faulty in response to a determination that the first optical signal OS1 transmitted over the main optical fiber 11 has not been detected.

[0014] In one embodiment, the second optical fiber detection device 120 includes a demultiplexer 121 and an optical sensor 122. The demultiplexer 121 is coupled to the main optical fiber 11 and is used to guide the first optical signal OS1 transmitted within the main optical fiber 11 to the optical sensor 122. The optical sensor 122 is also coupled to the demultiplexer 121 and is used to detect the first optical signal OS1 guided by the demultiplexer.

[0015] In embodiments of the present invention, the second optical fiber detection device 120 may incorporate a power supply (e.g., a battery) to provide the power necessary for detecting the first optical signal OS1. In other words, when the second optical fiber detection device 120 is externally connected to the second position of the main optical fiber 11, the second optical fiber detection device 120 can detect the first optical signal OS1 without requiring external power, but is not limited to this.

[0016] In different embodiments, the first and second positions of the main optical fiber 11 are, for example, any two positions on the main optical fiber 11, but are not limited thereto.

[0017] In embodiments of the present invention, the main optical signal SS is, for example, an optical signal that enables substantial data exchange between the client and the machine room. In a series of embodiments, the first optical signal OS1 may be, but is not limited to, a detection signal used solely to detect the state of the main optical fiber 11.

[0018] In Figure 1, one end of the first optical fiber detection device 110 can be connected to the main optical fiber 11, and the other end of the first optical fiber detection device 110 can be connected to a wavelength division multiplexing (WDM) device corresponding to a client, but is not limited to this.

[0019] In this embodiment, the WDM corresponding to the client can be connected to a plurality of sets of transceivers belonging to the client. Each set of transceivers is represented as a corresponding transmitter (denoted as TX) and receiver (denoted as RX), but is not limited thereto.

[0020] Similarly, one end of the second optical fiber detection device 120 can be connected to the main optical fiber 11, and the other end of the second optical fiber detection device 120 can be connected to the WDM corresponding to the machine room. In that case, the WDM corresponding to the machine room can be connected to a plurality of sets of transceivers belonging to the machine room, and those transceivers are also represented as corresponding TX and RX respectively, but are not limited thereto.

[0021] As can be seen from FIG. 1, the main optical signal SS can be transmitted between the WDM corresponding to the client and the WDM corresponding to the machine room via the main optical fiber 11. In that case, the first optical fiber detection device 110 externally connected to the main optical fiber 11 can separately emit the first optical signal OS1 on the main optical fiber 11 towards the second optical fiber detection device 120 and / or the machine room.

[0022] In one embodiment, when the main optical fiber 11 is not faulty due to being blocked or other similar reasons, the first optical signal OS1 transmitted on the main optical fiber 11 should be smoothly guided to the optical sensor 122 via the demultiplexing filter 121 and detected by the optical sensor 122.

[0023] In that case, the second optical fiber detection device 120 can determine that the first optical signal OS1 transmitted on the main optical fiber 11 has been detected, and based on this, determine that the main optical fiber 11 is not faulty.

[0024] On the other hand, when the main optical fiber 11 is faulty due to being blocked or other similar reasons, the first optical signal OS1 transmitted on the main optical fiber 11 cannot be smoothly detected by the optical sensor 122.

[0025] In that case, the second optical fiber detection device 120 can determine that the first optical signal OS1 transmitted over the main optical fiber 11 has not been detected, and based on that, it can determine that the main optical fiber 11 is faulty.

[0026] As can be seen from the above, in the embodiment of the present invention, the state of the main optical fiber 11 (for example, whether or not the circuit portion interposed between the first position and the second position on the main optical fiber 11 is faulty) can be detected by connecting the first optical fiber detection device 110 and the second optical fiber detection device 120 in a manner that connects them externally to the first and second positions of the main optical fiber 11, respectively.

[0027] Based on this, compared to a method in known technology that detects the state of the main optical fiber 11 based on the output of a portion of the main optical signal SS, the means in the embodiment of the present invention can detect the state of the main optical signal SS without introducing it and without affecting its transmission state. Furthermore, since the first optical fiber detection device 110 and the second optical fiber detection device 120 can emit and detect optical signals using their built-in power supplies, the concept of the present invention can be realized without requiring a fixed power supply point. Accordingly, the technical solution in the embodiment of the present invention not only solves the problem of data misjudgment due to the detachment of the optical fiber connector plug, but also solves the problems of high cost and difficulty in maintenance caused by the fact that existing optical switches must be built into the equipment.

[0028] Referring to Figure 2, it is a schematic diagram of the optical fiber performance detection system drawn based on Figure 1. In Figure 2, the structure and operation method of the optical fiber performance detection system 100 can be largely explained by referring to the related explanation in Figure 1, so it will not be described in detail again here.

[0029] The differences from Figure 1 are as follows: In Figure 2, the second optical fiber detection device 120 can separately provide an alarm W to the network management center 299 if it determines that the main optical fiber 11 is faulty. Therefore, personnel at the network management center 299 can immediately grasp the status of the main optical fiber 11 and take appropriate action (for example, dispatching personnel to repair it), but are not limited to that.

[0030] In the first embodiment shown in Figures 1 and 2, the concept can be understood as follows: the first optical fiber detection device 110 transmits a first optical signal OS1 in one direction to the second optical fiber detection device 120, and the state of the main optical fiber 11 is determined based on whether or not the second optical fiber detection device 120 has detected the first optical signal OS1.

[0031] In other embodiments, the second optical fiber detection device can transmit a second optical signal to the first optical fiber detection device, and the state of the main optical fiber 11 can be determined based on whether or not the first optical fiber detection device has detected the second optical signal. Furthermore, if a spare optical fiber exists between the client and the machine room, and the first and second optical fiber detection devices can individually detect a failure in the main optical fiber, they can immediately switch to using the spare optical fiber to transmit the main optical signal. Thus, it is possible to avoid situations where a failure in the main optical fiber affects communication between the client and the machine room. Further explanation will be given below based on the second embodiment.

[0032] Referring to Figure 3, this is a schematic diagram of an optical fiber performance detection system drawn based on a second embodiment of the present invention.

[0033] In Figure 3, the optical fiber performance detection system 300 includes a first optical fiber detection device 310 and a second optical fiber detection device 320.

[0034] The first optical fiber detection device 310 is externally connected to a first position of the main optical fiber 31 and provides a first optical signal OS1 having a first wavelength to be transmitted over the main optical fiber 31, the first wavelength being different from the wavelength of the main optical signal SS transmitted over the main optical fiber 31.

[0035] The second optical fiber detection device 320 is externally connected to the second position of the main optical fiber 31 and is configured to detect the first optical signal OS1 transmitted over the main optical fiber 31. In response to the determination that the first optical signal OS1 transmitted over the main optical fiber 31 is not detected, the second optical fiber detection device 320 determines that the main optical fiber 31 is faulty.

[0036] In this embodiment, the method by which the first optical fiber detection device 310 and the second optical fiber detection device 320 perform the above operations can be found in the related explanation in Figure 1. Furthermore, the devices and structures corresponding to the client and machine room can also be found in the related explanation in Figure 1.

[0037] The differences from Figure 1 are as follows: the first optical fiber detection device 310 in Figure 3 is further externally connected to a first position of the spare optical fiber 32, and the second optical fiber detection device 320 is further externally connected to a second position of the spare optical fiber 32. The first and second positions of the spare optical fiber 32 are, for example, any two positions on the spare optical fiber 32, but are not limited thereto.

[0038] Furthermore, the second optical fiber detection device 320 is configured such that a second optical signal OS2 having a second wavelength is transmitted over the main optical fiber 31, and the second wavelength is different from the wavelength of the first wavelength and the main optical signal SS.

[0039] In a series of embodiments, the first optical signal OS1 and the second optical signal OS2 may be, but are not limited to, two different detection signals used solely for detecting the state of the main optical fiber 11.

[0040] In that case, the first optical fiber detection device 310 can further detect the second optical signal OS2 transmitted over the main optical fiber 31, and in response to the determination that the second optical signal OS2 transmitted over the main optical fiber 31 has not been detected, it determines that the main optical fiber 31 is faulty and switches to use the backup optical fiber 32 to transmit and receive the main optical signal SS. Furthermore, in response to the determination by the second optical fiber detection device 320 that the main optical fiber 1 is faulty, the second optical fiber detection device 320 switches to use the backup optical fiber 32 to transmit and receive the main optical signal SS.

[0041] In other words, the first optical fiber detection device 310 and the second optical fiber detection device 320 can each transmit the first optical signal OS1 and the second optical signal OS2 to the other party via the main optical fiber 31. Furthermore, the first optical fiber detection device 310 and the second optical fiber detection device 320 can each detect whether or not the second optical signal OS2 and the first optical signal OS1 transmitted by the other party have been detected on the main optical fiber 31.

[0042] In one embodiment, if no fault occurs in the main optical fiber 31 (for example, if the circuit between the first and second positions on the main optical fiber 31 is not interrupted), the first optical fiber detection device 310 can detect the second optical signal OS2 emitted by the second optical fiber detection device 320 on the main optical fiber 31, and the second optical fiber detection device 320 can detect the first optical signal OS1 emitted by the first optical fiber detection device 310 on the main optical fiber 31. In this case, the first optical fiber detection device 310 and the second optical fiber detection device 320 can each determine that no fault occurs in the main optical fiber 31.

[0043] On the other hand, if a fault occurs in the main optical fiber 31 (for example, if the circuit between the first and second positions on the main optical fiber 31 is interrupted), the first optical fiber detection device 310 will not be able to detect the second optical signal OS2 emitted by the second optical fiber detection device 320 on the main optical fiber 31, and the second optical fiber detection device 320 will not be able to detect the first optical signal OS1 emitted by the first optical fiber detection device 310 on the main optical fiber 31. In that case, the first optical fiber detection device 310 and the second optical fiber detection device 320 can each determine that a fault has occurred in the main optical fiber 31.

[0044] In Figure 3, the first optical fiber detection device 310 and the second optical fiber detection device 320 are further connected to the first and second positions of the backup optical fiber 32, respectively. Therefore, if the first optical fiber detection device 310 and the second optical fiber detection device 320 determine that the main optical fiber 31 has failed, they can immediately switch to using the backup optical fiber 32 to transmit the main optical signal SS and maintain communication between the client and the machine room.

[0045] In one embodiment, the first optical fiber detection device 310 includes a first light source 312, a first demultiplexer 311, a second demultiplexer 313, a first optical sensor 314, and a first optical switching circuit 315. The first light source 312 emits a first optical signal OS1 having a first wavelength. The first demultiplexer 311 is coupled to the first light source 312 and the main optical fiber 31 and is used to guide the first optical signal OS1 emitted by the first light source 312 so that it is transmitted within the main optical fiber 31. The second demultiplexer 313 is coupled to the main optical fiber 31 and is used to guide the second optical signal OS2 transmitted within the main optical fiber 31 to the first optical sensor 314. The first optical sensor 314 is coupled to the second demultiplexer 313 and is used to detect the second optical signal OS2 guided by the second demultiplexer 313. The first optical switching circuit 315 is coupled to the first position of the main optical fiber 31 and the first position of the auxiliary optical fiber 32, and is used to switch between transmitting and receiving the main optical signal SS using the main optical fiber 31 or the auxiliary optical fiber 32.

[0046] In one embodiment, the first optical switching circuit 315 can be, for example, an optical switch that is simultaneously coupled to the optical fiber 31 and the backup optical fiber 32 and switches the optical path.

[0047] In an embodiment of the present invention, the first optical switching circuit 315 can transmit the main optical signal SS to the second optical fiber detection device 320 and / or the machine room via the main optical fiber 31 when the main optical fiber 31 is not faulty. On the other hand, the first optical switching circuit 315 can switch to using the backup optical fiber 32 when the main optical fiber 31 is faulty, and transmit the main optical signal SS to the second optical fiber detection device 320 and / or the machine room via the backup optical fiber 32, but is not limited to this.

[0048] In embodiments of the present invention, the first optical fiber detection device 310 can incorporate a power supply (e.g., a battery) to provide the power necessary for transmitting the first optical signal OS1 and detecting the second optical signal OS2. In other words, if the first optical fiber detection device 310 is externally connected to a first position of the main optical fiber 31, the first optical fiber detection device 310 can transmit the first optical signal OS1 and detect the second optical signal OS2 without requiring external power, but is not limited to this.

[0049] The second optical fiber detection device 320 also includes a second light source 324, a third demultiplexer 323, a fourth demultiplexer 321, a second optical sensor 322, and a second optical switching circuit 325. The second light source 324 emits a second optical signal OS2 having a second wavelength. The third demultiplexer 323 is coupled to the second light source 324 and the main optical fiber 31 and is used to guide the second optical signal OS2 emitted by the second light source 324 so that it is transmitted within the main optical fiber 31. The fourth demultiplexer 321 is coupled to the main optical fiber 31 and is used to guide the first optical signal OS1 transmitted within the main optical fiber 31 to the second optical sensor 322. The second optical sensor 322 is coupled to the fourth demultiplexer 321 and is used to detect the first optical signal OS1 guided by the fourth demultiplexer 321. The second optical switching circuit 325 is coupled to the second position of the main optical fiber 31 and the second position of the auxiliary optical fiber 32, and is used to switch between transmitting and receiving the main optical signal SS using either the main optical fiber 31 or the auxiliary optical fiber 32.

[0050] In one embodiment, the second optical switching circuit 325 can be, for example, an optical switch that is simultaneously coupled to the main optical fiber 31 and the backup optical fiber 32 and switches the optical path.

[0051] In an embodiment of the present invention, the second optical switching circuit 325 can transmit the main optical signal SS to the first optical fiber detection device 310 and / or client via the main optical fiber 31 when the main optical fiber 31 is not faulty. On the other hand, the second optical switching circuit 325 can switch to using the backup optical fiber 32 when the main optical fiber 31 is faulty, and transmit the main optical signal SS to the first optical fiber detection device 310 and / or client via the backup optical fiber 32, but is not limited to this.

[0052] In embodiments of the present invention, the second optical fiber detection device 320 can incorporate a power supply (e.g., a battery) to provide the power necessary for transmitting the second optical signal OS2 and detecting the first optical signal OS1. In other words, if the second optical fiber detection device 320 is externally connected to the second position of the main optical fiber 31, the second optical fiber detection device 320 can transmit the second optical signal OS2 and detect the first optical signal OS1 without requiring external power, but is not limited to this.

[0053] Furthermore, similar to the concept described in Figure 2, the first optical fiber detection device 310 and / or the second optical fiber detection device 320 in Figure 3 can also separately provide an alarm to the network management center if it is determined that the main optical fiber 31 is faulty. Therefore, personnel at the network management center can immediately grasp the status of the main optical fiber 31 and take appropriate action (for example, dispatching personnel to repair it), but are not limited to this.

[0054] In a series of embodiments, if the overall structure shown in Figure 3 is considered as a single network structure, the network management center can manage multiple network structures simultaneously. In this case, the personnel of the network management center can immediately grasp the status of the main optical fiber in each network structure based on the alarms provided by each network structure and take appropriate action (for example, dispatching personnel to repair it), but are not limited to this.

[0055] Referring to Figure 4, it is a schematic diagram of a network management center, based on Figure 3, that manages multiple network structures.

[0056] In Figure 4, the network shown may include, for example, multiple network structures 41-43 shown in Figure 3, and each of the network structures 41-43 (including the second optical fiber detection device) can be individually connected to the network management center 499. In this case, each network structure 41-43 is operated in the manner taught in the previous embodiment and transmits a corresponding alarm W to the network management center 499 in a timely manner according to the status of the corresponding main optical fiber (e.g., whether it is faulty or not), but is not limited to this.

[0057] In summary, the optical fiber performance detection system provided in the embodiment of the present invention can detect the state of the main optical fiber (for example, whether or not the circuit portion interposed between the first and second positions on the main optical fiber is faulty) by connecting the first optical fiber detection device and the second optical fiber detection device in a manner that connects them externally to the first and second positions of the main optical fiber, respectively.

[0058] Based on this, the means in the embodiments of the present invention can detect signals non-introduced without affecting the existing transmission state of the main optical signal. Furthermore, since the first optical fiber detection device and the second optical fiber detection device can emit and detect optical signals using their built-in power supplies, the concept of the present invention can be realized without requiring a fixed power supply point.

[0059] Furthermore, if a backup optical fiber is available, the first and second optical fiber detection devices in the embodiment of the present invention can immediately switch to using the backup optical fiber to transmit the main optical signal when a failure in the main optical fiber is detected. Therefore, communication between the client and the machine room can be maintained relatively well.

[0060] As can be seen from the above, the technical solution in the embodiment of the present invention not only solves the problem of data misjudgment due to the detachment of the optical fiber connector plug, but also solves the problems of high cost and difficulty in maintenance that arise from the fact that existing optical switches must be built into the equipment.

[0061] Although the present invention has already been disclosed as examples above, this does not limit the invention, and a series of modifications and alterations can be made without deviating from the spirit and scope of the invention by those skilled in the art. Therefore, the scope of protection of the present invention is based on the scope defined by the claims of this application. [Industrial applicability]

[0062] The optical fiber performance detection system proposed in this invention can be applied to optical fiber systems. [Explanation of symbols]

[0063] 100, 300 Fiber Optic Performance Detection System 110 First Optical Fiber Detection Device 120, 320 Second Optical Fiber Detection Device OS1 First Optical Signal SS main optical signal 112 Light source 111, 121 Splitter Filter 122 Light Sensor 299, 499 Network Management Center W Alarm 310 Fiber Optic Detection Device OS2 Second Optical Signal 312 1st light source 311 First Demultiplexer Filter 313 Second demultiplexer filter 314 First Optical Sensor 315 First Optical Switching Circuit 324 2nd light source 323 Third demultiplexer filter 321 Fourth Demultiplexer Filter 322 Second Optical Sensor 325 Second Optical Switching Circuit 11, 31 Main optical fiber 32 Spare optical fiber 41-43 Network Structure

Claims

1. A first optical fiber detection device is externally connected to a first position of a main optical fiber and provides a first optical signal having a first wavelength to be transmitted on the main optical fiber, wherein the first wavelength is different from the wavelength of the main optical signal transmitted on the main optical fiber. An optical fiber performance detection system including a second optical fiber detection device which is externally connected to a second position of the main optical fiber and detects the first optical signal transmitted on the main optical fiber, and is configured to determine that the main optical fiber is faulty in response to a determination that the first optical signal transmitted on the main optical fiber is not detected.

2. The first optical fiber detection device is A first light source that emits the first optical signal having the first wavelength, The optical fiber performance detection system according to claim 1, comprising: a first light source and a first demultiplexer filter coupled to the main optical fiber, which guides the first optical signal emitted by the first light source to be transmitted into the main optical fiber.

3. The second optical fiber detection device is A second demultiplexer is coupled to the main optical fiber and guides the first optical signal transmitted within the main optical fiber to the first optical sensor. The optical fiber performance detection system according to claim 2, further comprising: a first optical sensor coupled to the second demultiplexer and used to detect the first optical signal guided by the second demultiplexer.

4. The second optical fiber detection device further, The optical fiber performance detection system according to claim 1, configured to provide an alarm to a network management center in response to a determination that the main optical fiber is faulty.

5. The first optical fiber detection device is further externally connected to a first position of the spare optical fiber, and the second optical fiber detection device is further externally connected to a second position of the spare optical fiber. The second optical fiber detection device is further configured to provide and transmit a second optical signal having a second wavelength onto the main optical fiber, wherein the second wavelength is different from the first wavelength and the wavelength of the main optical signal. The first optical fiber detection device further detects the second optical signal transmitted on the main optical fiber, In response to the determination that the second optical signal transmitted on the main optical fiber is not detected, the system determines that the main optical fiber is faulty and switches to using the backup optical fiber to transmit and receive the main optical signal. The optical fiber performance detection system according to claim 1, wherein, in response to the second optical fiber detection device's determination that the main optical fiber is faulty, the second optical fiber detection device switches to using the backup optical fiber and transmits and receives the main optical signal.

6. The first optical fiber detection device is A first light source that emits the first optical signal having the first wavelength, A first demultiplexer is coupled to the first light source and the main optical fiber, and guides the first optical signal emitted by the first light source so that it is transmitted through the main optical fiber. A second demultiplexer is coupled to the main optical fiber and guides the second optical signal transmitted within the main optical fiber to the first optical sensor. The first optical sensor is coupled to the second demultiplexer and is used to detect the second optical signal guided by the second demultiplexer, The optical fiber performance detection system according to claim 4, comprising: a first optical switching circuit coupled to the first position of the main optical fiber and the first position of the auxiliary optical fiber, and for switching to transmit and receive the main optical signal using the main optical fiber or the auxiliary optical fiber.

7. The second optical fiber detection device is A second light source that emits the second optical signal having the second wavelength, A third demultiplexer is coupled to the second light source and the main optical fiber, and guides the second optical signal emitted by the second light source so that it is transmitted through the main optical fiber. A fourth demultiplexer is coupled to the main optical fiber and guides the first optical signal transmitted within the main optical fiber to the second optical sensor. The second optical sensor is coupled to the fourth demultiplexer and is used to detect the first optical signal guided by the fourth demultiplexer, The optical fiber performance detection system according to claim 5, comprising: a second optical switching circuit coupled to the second position of the main optical fiber and the second position of the auxiliary optical fiber, and for switching to transmit and receive the main optical signal using the main optical fiber or the auxiliary optical fiber.

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