TWM491845U - Optical fiber line switching control device - Google Patents

Description

Optical fiber line switching control device

The present invention relates to an optical fiber line switching control device, and more particularly to a switching control device for detecting the state of an optical fiber line.

The communication field can be divided into wireless data transmission and wired data transmission. For wired data transmission, optical fiber communication has the advantages of long communication distance, low loss, wide frequency, low electromagnetic wave interference, etc., so the optical fiber communication has a tendency to become popular.

Referring to FIG. 5, it is assumed that a near-end fiber device 61 and a remote fiber device 62 are respectively disposed in the two separated spaces, and a first main fiber line is connected between the near-end fiber device 61 and the remote fiber device 62. 631, a first backup fiber line 632, a second main fiber line 633 and a second spare fiber line 634, the fiber lines 631~634 are only for data one-way transmission, that is, the near-end fiber device 61 can pass through the The first primary fiber line 631 or the first backup fiber line 632 transmits data to the remote fiber device 62, and the remote fiber device 62 can transmit data through the second primary fiber line 633 or the second backup fiber line 634. To the near end fiber optic device 61.

In the general case, the near-end fiber device 61 and the remote fiber device 62 are mainly used for data transmission by the first main fiber line 631 and the second main fiber line 633. During the data transmission, for example, the near-end fiber optic device 61 transmits an optical data to the remote fiber device 62 through the first main fiber line 631. After receiving the optical data, the remote fiber device 62 When it is determined that the optical power of the optical data is too low or abnormal, if the first primary optical fiber line 631 has a problem, the remote optical fiber device 62 and the near-end optical fiber device 61 automatically switch to the first and second backup optical fibers simultaneously. Lines 632, 634. In this way, the near-end fiber device 61 and the remote fiber device 62 can transmit data through the first backup fiber line 632 and the second backup fiber line 634. Since the first main optical fiber line 631 has not transmitted data, the worker can perform maintenance work on the first main optical fiber line 631.

Although the foregoing optical fiber device can automatically switch to the backup optical fiber line when an abnormality occurs in the main optical fiber line to ensure smooth data transmission, the worker cannot know the abnormal position of the main optical fiber line when the main optical fiber line is inspected, thereby It takes time and effort to check the location of the abnormality of the fiber-optic line, causing troubles for staff maintenance.

Therefore, the main purpose of the present invention is to provide an optical fiber line switching control device, which can be used for an external test device for detecting an abnormal position of the optical fiber line, thereby avoiding troubles caused by the worker detecting the position of the optical fiber line.

The optical fiber line switching control device of the present invention comprises: a signal input port, a first detecting port, a signal output port, a second detecting port, a first line port, a second line port, and a third line. The first detecting port and the second detecting port are respectively connected to the test instrument to receive a detecting optical signal, and the first to fourth line connecting ports are respectively connected to the optical fiber line; The optical switch has a first connection end, a second connection end, a third connection end and a fourth connection end, the first connection end is connected to the signal input port, and the second connection end is connected to the first line a first connection end connected to the second line connection port; a detection signal transceiver having a first end and a second end; a first split multiplexer comprising a first end, a second The first end is connected to the first detecting port, the second end is connected to the first end of the detecting signal transceiver, and the third end is connected to the third end of the first optical switch. Transmitting the detected light signal to light a second optical switch having a first connecting end, a second connecting end, a third connecting end and a fourth connecting end, wherein the first connecting end is connected to the signal output port, the second connection The second connection port is connected to the third line connection port, and the fourth connection end is connected to the fourth line connection port; a second branching multiplexer includes a first end, a second end and a third end, the first end Connected to the second end of the detection signal transceiver, the second end of the second demultiplexing multiplexer is connected to the second detecting port, and the third end is connected to the third connecting end of the second optical switch; a controller, The first optical switch, the second optical switch, and the detection signal transceiver are electrically connected to switch the connections of the connection ends of the first and second optical switches.

In use, a near-end network device and a remote network device can be respectively connected to the authoring optical fiber line switching control device to connect to each other via the authoring connection to the optical fiber line, because the creation has detection port for connecting the external device. a test instrument, such as an optical time domain reflectometer (OTDR), such that the optical time domain reflectometer can transmit a detected optical signal to the failed optical fiber line and based on the reflected light signal in the optical fiber line The scattered feedback energy is used to generate a feedback signal, and the staff can determine the position of the fault point according to the waveform of the feedback signal, so the worker does not have to spend time and heart to check the abnormal position of the optical fiber line, and improve the optical line maintenance efficiency.

Referring to FIG. 1 and FIG. 2, the optical fiber line switching control apparatus includes a plurality of ports, a first optical switch 11, and a first wavelength multiplexer (WDM) 12, one. a detection signal transceiver 13, a second wavelength division multiplexer 14, a second optical switcher 15 and a controller 16, the ports 一 including a signal input 埠In, a first detection 埠M1, and a signal output 埠Out, a second detection 埠M2, a first line connection 埠Pout, a second line connection 埠Sout, a third line connection 埠Pin and a fourth line connection 埠Sin. The creations can be integrated into a control box that is exposed to the control box for connection to an external signal generating device or fiber optic line.

The first optical switch 11 has a first connecting end A, a second connecting end B, a third connecting end C and a fourth connecting end D. The first connecting end A is connected to the signal input port In, The second connection end B is connected to the first line connection port Pout, and the fourth connection end D is connected to the second line connection port Sout, wherein the first coupler 21 is connected between the signal input port In and the first connection end A. A second coupler 22 is connected between the second connection terminal B and the first line connection port Pout, and a third coupler 23 is connected between the fourth connection terminal D and the second line connection port Sout.

The first splitter multiplexer 12 includes a first end 121, a second end 122 and a third end 123. The first end 121 is connected to the first detecting port M1, and the third end 123 is connected to the first light. The third connection end C of the switcher 11.

The detection signal transceiver 13 has a first end 131 and a second end 132. The first end 131 is connected to the second end 122 of the first split multiplexer 12.

The second optical switch 15 has a first connecting end E, a second connecting end F, a third connecting end G and a fourth connecting end H, and the first connecting end E is connected to the signal output 埠Out, The second connection end F is connected to the third line connection port Pin, and the fourth connection end H is connected to the fourth line connection port Sin. A fourth coupler 24 is connected between the signal output 埠Out and the first connecting end E, and a fifth coupler 25 is connected between the second connecting end F and the third line connecting port Pin. The fourth connecting end H is connected. A sixth coupler 26 is connected between the fourth line connection 埠Sin.

The second splitter multiplexer 14 includes a first end 141, a second end 142 and a third end 143. The first end 141 is connected to a second end 132 of the detection signal transceiver 13. The second end 142 is connected to the second detecting port M2, and the third end 143 is connected to the third connecting end G of the second optical switcher 15.

As shown in FIG. 2, the controller 16 is electrically connected to the first optical switch 11, the second optical switch 15, and the detection signal transceiver 13, and the plurality of inputs of the controller 16 are respectively coupled to a first light detecting device. The device is electrically connected to the first coupler 21, electrically connected to the second coupler 22 via a second photodetector 220, and electrically connected to the third coupler 23 via a third photodetector 230. The fourth photodetector 240 is electrically connected to the fourth coupler 24, electrically connected to the fifth coupler 25 via a fifth photodetector 250, and electrically connected to the sixth coupler via a sixth photodetector 260. 26, the detectors 210-260 are used to detect the optical power in the optical fiber line, and the controller 16 obtains the optical power information of the optical fiber line through the optical detectors 210-260.

Referring to FIG. 3, it is assumed that a near-end fiber optic device 31 and a remote fiber optic device 32 are respectively disposed in the two separated spaces. The near-end fiber optic device 31 and the remote fiber optic device 32 are respectively connected as shown in FIG. The optical fiber line switching control device is hereinafter referred to as a near-end optical fiber line switching control device 33 and a remote optical fiber line switching control device 34. Taking the near end as an example, the near-end fiber optic device 31 includes an optical data output port P1, a first optical time domain reflectometer connection port OTDR1, an optical data receiving port P2, and a second optical time domain reflectometer port OTDR2. The optical data output 埠P1 is electrically connected to the signal input 埠In of the near-end optical fiber line switching control device 33, and the first optical time domain reflectometer connection 埠OTDR1 is electrically connected to the first detection 埠M1, and the optical data is received. The P2 is electrically connected to the signal output 埠Out, the second optical time domain reflectometer is connected to the OTDR2 to be electrically connected to the second detection 埠M2; and the connection relationship between the remote optical fiber device 32 and the remote optical fiber switching control device 34 Reference may be made to the foregoing analogy with FIG. 3, and details are not described herein.

The first line port 埠Pout of the near-end fiber line switching control device 33 is connected to the third line port 埠Pin of the far-end fiber line switching control device 34 through a first main fiber line 41, and the near-end fiber line switching The second line port 埠Sout of the control device 33 is connected to the fourth line port 埠Sin of the far-end fiber line switching control device 34 via a first spare fiber line 42, the third of the near-end fiber line switching control device 33 The line port 埠Pin is connected to the first line port 埠Pout of the far-end fiber line switching control device 34 via a second main fiber line 43, and the fourth line connection 埠Sin of the near-end fiber line switching control device 33 passes through The second spare fiber line 44 is connected to the second line port 埠Sout of the far end fiber line switching control device 34. The optical fiber lines 41-44 are only for one-way transmission of data, that is, the first main optical fiber line 41 and the first backup optical fiber line 42 are for transmitting data from the near end to the far end, and the second main optical line 43 and the second are The spare fiber line 44 is for data transfer from the far end to the near end.

Referring to FIG. 1 to FIG. 3, in the normal case, the first optical fiber line switching control device 33 and the first optical switch 11 of the remote optical fiber line switching control device 34 are connected to the first connection end A. The connecting end B, in the second optical switch 15, the first connecting end E is also connected to the second connecting end F. In this way, the optical data outputted by the near-end optical fiber device 31 from the optical data output port P1 is transmitted to the remote optical fiber line switching control device 34 and the remote optical fiber device 32 through the first main optical fiber line 41. Similarly, the optical data outputted by the remote optical fiber device 32 from the optical data output port P1 is transmitted to the near-end optical fiber line switching control device 33 and the near-end optical fiber device 31 through the second main optical fiber line 43. In addition, in the first optical switch 11 of the near-end and far-end optical fiber line switching control devices 33, 34, the third connection end C is connected to the fourth connection end D, and the third connection end of the second optical switch 15 G is connected to the fourth connection end H, and the detection signal transceiver 13 at the near end can transmit a detection signal, and is received by the detection signal transceiver 13 of the remote optical fiber line switching control device 34 via the first backup optical fiber line 42 for the The remote optical fiber line switching control device 34 determines whether the first backup optical fiber line 42 is normal. Similarly, the remote detection signal transceiver 13 can transmit a detection signal, and the near-end optical fiber line 44 is switched to the near-end optical fiber line. The detection signal transceiver 13 of the control unit 34 receives the near-end fiber line switching control unit 34 to determine whether the second spare fiber line 44 is normal.

For example, the near-end fiber optic equipment 31 transmits an optical data to the first main fiber line 41 through the near-end fiber line switching control device 33 when the remote fiber line switching control device 34 is from the first main fiber line 41. After receiving the optical data, the fifth photodetector 250 detects the optical power, and the controller 16 receives the detection result. When the controller 16 determines that the optical power is too low or abnormal according to the detection result, if the first main optical fiber line 41 has a problem, the detection signal transceiver 13 determines that the first and second backup optical fiber lines 42 are Under the premise of normal operation, the following actions are simultaneously performed: (a) the remote optical fiber line switching control device 34 transmits a control signal to the controller 16 of the near-end optical fiber line switching control device 33 via the second main optical fiber line 43, And causing the near-end controller 16 to switch the first connection ends A and E of the first optical switch 11 and the second optical switch 15 to the fourth connection ends D, H respectively according to the control signal, and to first The third switch terminals C, G of the optical switch 11 and the second optical switch 15 are respectively switched and connected to the second connection terminals B, F; (b) the remote optical fiber line switching control device 34 has its first optical switch 11 and the first connection ends A, E of the second optical switch 15 are respectively switched and connected to the fourth connection ends D, H, and the first optical switch 11 and the third connection end C of the second optical switch 15 G switches to the second connection terminals B, F, respectively. In this way, the near-end fiber optic equipment 31 and the remote fiber optic equipment 32 can utilize the first and second spare fiber optic lines 42, 44 for data transmission.

The first detection time 埠M1 of the near-end optical fiber line switching control device 33 is electrically connected to the first optical time domain reflectometer connection 埠OTDR1, so that a detection optical signal from the near-end optical fiber device 31 can be received, and the detection light is received. The signal enters the first main fiber line 41 through the first split multiplexer 12 and the first optical switch 11 , and the density and the composition of the optical fiber line are uneven, causing a slight change in the refractive index, so that the detection optical signal The first main fiber line 41 generates reflection and scattering, and the reflected and scattered feedback energy is returned to the first light via the first optical switch 11, the first split multiplexer 12 and the first detecting 埠M1. When the domain reflector is connected to the OTDR1, the near-end fiber device 31 detects the feedback energy, and generates a feedback signal 50 as shown in FIG. 4 according to the feedback energy. Referring to FIG. 4, the feedback signal 50 is at different distances. A plurality of glitch A, B, C, and D are displayed, and the glitch A, B, C, and D respectively represent a fiber event occurrence position, so the feedback signal 50 can provide a failure point of the first main fiber line 41. Location information.

In summary, the creation can switch to the spare fiber line for data transmission immediately after detecting the abnormality of the main fiber line. For the faulty fiber line, the creation also provides detection of 埠M1 and M2 for external use. The fiber optic equipment or the test equipment is connected, so that the external fiber optic equipment or the test equipment transmits the detection optical signal to the faulty optical fiber line through the creation, and enables the external optical fiber device or the test equipment to receive the feedback energy of the detection optical signal on the optical fiber line. After that, the feedback signal waveform of the optical fiber line including the information of the fault point is obtained, so the staff can directly repair the optical fiber line according to the information displayed by the feedback signal waveform, thereby greatly improving the line maintenance efficiency.

11‧‧‧First optical switcher
12‧‧‧First Split-Wave Multiplexer
121‧‧‧ first end
122‧‧‧ second end
123‧‧‧ third end
13‧‧‧Detection Signal Transceiver
131‧‧‧ first end
132‧‧‧ second end
14‧‧‧Second-wavelength multiplexer
141‧‧‧ first end
142‧‧‧ second end
143‧‧‧ third end
15‧‧‧Second optical switcher
16‧‧‧ Controller
21‧‧‧First coupler
210‧‧‧First Detector
22‧‧‧Second coupler
220‧‧‧Second Detector
23‧‧‧ Third coupler
230‧‧‧ Third Detector
24‧‧‧fourth coupler
240‧‧‧Four Detector
25‧‧‧ fifth coupler
250‧‧‧ Fifth Detector
26‧‧‧ sixth coupler
260‧‧‧Sixth Detector
31‧‧‧ Near-end fiber optic equipment
32‧‧‧Remote fiber optic equipment
33‧‧‧ Near-end optical line switching control device
34‧‧‧Remote fiber line switching control device
41‧‧‧First main fiber line
42‧‧‧First spare fiber line
43‧‧‧Second main fiber line
44‧‧‧second spare fiber line
50‧‧‧ feedback signal
61‧‧‧ Near-end fiber optic equipment
62‧‧‧Remote fiber optic equipment
631‧‧‧First main fiber line
632‧‧‧First spare fiber line
633‧‧‧second main fiber line
634‧‧‧second spare fiber line

Figure 1: Schematic diagram of a circuit block (1) of the preferred embodiment of the present invention. Figure 2 is a block diagram showing the circuit of the preferred embodiment of the present invention. (2) Figure 3: Reference diagram of the use of the optical fiber line switching control device of the present invention. Figure 4: Schematic diagram of the OTDR feedback signal waveform. Figure 5: Schematic diagram of the connection of the fiber optic equipment.

11‧‧‧First optical switcher

12‧‧‧First Split-Wave Multiplexer

121‧‧‧ first end

122‧‧‧ second end

123‧‧‧ third end

13‧‧‧Detection Signal Transceiver

131‧‧‧ first end

132‧‧‧ second end

14‧‧‧Second-wavelength multiplexer

141‧‧‧ first end

142‧‧‧ second end

143‧‧‧ third end

15‧‧‧Second optical switcher

21‧‧‧First coupler

210‧‧‧First Detector

22‧‧‧Second coupler

220‧‧‧Second Detector

23‧‧‧ Third coupler

230‧‧‧ Third Detector

24‧‧‧fourth coupler

240‧‧‧Four Detector

25‧‧‧ fifth coupler

250‧‧‧ Fifth Detector

26‧‧‧ sixth coupler

260‧‧‧Sixth Detector

Claims (5)

An optical fiber line switching control device includes: a signal input port, a first detecting port, a signal output port, a second detecting port, a first line port, a second line port, and a third line The first detecting port and the second detecting port are respectively connected to the test instrument to receive a detecting optical signal, and the first to fourth line connecting ports are respectively connected to the optical fiber line; The optical switch has a first connection end, a second connection end, a third connection end and a fourth connection end, the first connection end is connected to the signal input port, and the second connection end is connected to the first line a first connection end connected to the second line connection port; a detection signal transceiver having a first end and a second end; a first split multiplexer comprising a first end, a second The first end is connected to the first detecting port, the second end is connected to the first end of the detecting signal transceiver, and the third end is connected to the third end of the first optical switch. Transmitting the detected light signal to light a second optical switch having a first connecting end, a second connecting end, a third connecting end and a fourth connecting end, wherein the first connecting end is connected to the signal output port, the second connection The second connection port is connected to the third line connection port, and the fourth connection end is connected to the fourth line connection port; a second branching multiplexer includes a first end, a second end and a third end, the first end Connected to the second end of the detection signal transceiver, the second end of the second demultiplexing multiplexer is connected to the second detecting port, and the third end is connected to the third connecting end of the second optical switch; a controller, The first optical switch, the second optical switch, and the detection signal transceiver are electrically connected to switch the connections of the connection ends of the first and second optical switches. The optical fiber line switching control device of claim 1, wherein a first coupler is connected between the signal input port and the first connection end of the first optical switch, and the second connection end of the first optical switch is A second coupler is connected between the first line connection port, and a third coupler is connected between the fourth connection end of the first optical switch and the second line connection port, and the signal output port and the second light switch A fourth coupler is connected between the first connection end of the second connection end, and a fifth coupler is connected between the second connection end of the second optical switch and the third line connection port, and the fourth optical switcher is connected to the fourth A sixth coupler is connected between the connection end and the fourth line connection port; the plurality of input ends of the controller are electrically connected to the first coupler via a first photodetector, and electrically connected via a second photodetector The second coupler is electrically connected to the second coupler, electrically connected to the third coupler via a third optical detector, electrically connected to the fourth coupler via a fourth optical detector, and electrically connected via a fifth optical detector. The fifth coupler is electrically connected to the sixth coupling via a sixth photodetector Device, the plurality of optical detector for detecting optical power in the optical fiber line, the optical power control information acquired through the plurality of optical fiber line optical detector. The optical fiber line switching control device according to claim 1 or 2, wherein the optical fiber line switching control device is integrated in a control box, the signal input port, the first detecting port, the signal output port, the second detecting port, and the first line The connection port, the second line connection port, the third line connection port, and the fourth line connection port are exposed to the control box. The optical fiber line switching control device according to claim 1 or 2, wherein the test instrument to which the first detecting port and the second detecting port are connected is an optical time domain reflectometer (OTDR). The optical fiber line switching control device of claim 3, wherein the test instrument to which the first detecting port and the second detecting port are connected is an optical time domain reflectometer (OTDR).