WO2021161724A1 - 光ファイバの融着接続機及び光ファイバを融着接続する方法 - Google Patents
光ファイバの融着接続機及び光ファイバを融着接続する方法 Download PDFInfo
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- WO2021161724A1 WO2021161724A1 PCT/JP2021/001470 JP2021001470W WO2021161724A1 WO 2021161724 A1 WO2021161724 A1 WO 2021161724A1 JP 2021001470 W JP2021001470 W JP 2021001470W WO 2021161724 A1 WO2021161724 A1 WO 2021161724A1
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- end faces
- optical fiber
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- optical fibers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2553—Splicing machines, e.g. optical fibre fusion splicer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2552—Splicing of light guides, e.g. by fusion or bonding reshaping or reforming of light guides for coupling using thermal heating, e.g. tapering, forming of a lens on light guide ends
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2555—Alignment or adjustment devices for aligning prior to splicing
Definitions
- the present disclosure relates to an optical fiber fusion splicer and a method of fusion splicing an optical fiber.
- Patent Document 1 discloses a technique relating to an optical fiber fusion splicer.
- the fusion splicer described in this document is a device for fusion splicing two optical fibers to each other.
- This device includes imaging means, information extraction means, storage means, selection means, discharge means, and control means.
- the imaging means obtains a transmitted light image by transmitted light at the ends of the two optical fibers.
- the information extraction means extracts end face information of each of the two optical fibers by using the brightness distribution of the transmitted light image.
- the storage means stores a plurality of connection conditions in advance.
- the selection means selects the connection condition corresponding to the end face information from the plurality of connection conditions.
- the discharge means generates an arc discharge that is applied to the connecting end faces of the two optical fibers.
- the control means controls the amount of discharge energy of the arc discharge according to the connection conditions selected by the selection means.
- the optical fiber fusion splicer includes an image acquisition unit, a condition setting unit, and a fusion splicing unit.
- the image acquisition unit acquires an image including each end face of the first and second optical fibers in a state where the end faces of the first and second optical fibers to be connected are arranged to face each other.
- the condition setting unit grasps the state of each end face based on the image and sets the connection condition according to the state of each end face.
- the fusion splicing unit fuses and connects the first and second optical fibers to each other by electric discharge between the pair of electrode rods according to the connection conditions set by the condition setting unit.
- connection conditions are the position of each end face before the start of discharge, the distance between each end face before the start of discharge, the preliminary discharge time, the main discharge time, the amount of pushing after each end face comes into contact with each other, and each end face pushed together. Includes at least one of the later pullback amounts.
- the method of fusion-bonding the optical fibers includes an image acquisition step, a condition setting step, and a fusion-bonding connection step.
- the image acquisition step acquires an image including each end face of the first and second optical fibers in a state where the end faces of the first and second optical fibers to be connected are arranged to face each other.
- the condition setting step grasps the state of each end face based on the image, and sets the connection condition according to the state of each end face.
- the first and second optical fibers are fused and spliced to each other by electric discharge between the pair of electrode rods according to the connection conditions set by the condition setting step.
- connection conditions are the position of each end face before the start of discharge, the distance between each end face before the start of discharge, the preliminary discharge time, the main discharge time, the amount of pushing after each end face comes into contact with each other, and each end face pushed together. Includes at least one of the later pullback amounts.
- FIG. 1 is a perspective view showing the appearance of the optical fiber fusion splicer according to the embodiment.
- FIG. 1 shows the appearance of the windshield cover in a closed state.
- FIG. 2 is a perspective view showing the appearance of the optical fiber fusion splicer according to the embodiment.
- FIG. 2 shows the appearance of the fusion splicer with the windshield cover opened so that the internal structure of the fusion splicer can be seen.
- FIG. 3 is a functional block diagram showing a configuration of an internal system included in the fusion splicer.
- FIG. 4 is a block diagram showing an example of the hardware configuration of the fusion control unit.
- FIG. 5 is a diagram showing the operation of the fusion splicer of one embodiment.
- FIG. 6 is a diagram showing the operation of the fusion splicer of one embodiment.
- FIG. 7 is a diagram showing the operation of the fusion splicer of one embodiment.
- FIG. 8 is a view of the end face of the optical fiber viewed from the optical axis direction.
- FIG. 9 is a diagram schematically showing an image obtained by a camera that captures an image from a certain direction.
- FIG. 10 is a view of the end face of the optical fiber viewed from the optical axis direction.
- FIG. 11 is a diagram schematically showing an image obtained by a camera that captures an image from a certain direction.
- FIG. 12 is a view of the end face of the optical fiber viewed from the optical axis direction.
- FIG. 13 is a diagram schematically showing an image obtained by a camera that captures images from another direction.
- FIG. 14 is a diagram schematically showing the position of each end face before the start of discharge.
- FIG. 15 is a flowchart showing a fusion splicing method according to an embodiment.
- connection conditions such as discharge power and the position of the tip of the optical fiber are set.
- the quality of the fusion splicing changes, and the amount of increase in transmission loss (connection loss) in the splicing portion increases or decreases.
- Suitable connection conditions vary depending on the condition of the end face of the optical fiber.
- the optical fiber fusion splicer includes an image acquisition unit, a condition setting unit, and a fusion splicer.
- the image acquisition unit acquires an image including each end face of the first and second optical fibers in a state where the end faces of the first and second optical fibers to be connected are arranged to face each other.
- the condition setting unit grasps the state of each end face based on the image and sets the connection condition according to the state of each end face.
- the fusion splicing unit fuses and connects the first and second optical fibers to each other by electric discharge between the pair of electrode rods according to the connection conditions set by the condition setting unit.
- connection conditions are the position of each end face before the start of discharge, the distance between each end face before the start of discharge, the preliminary discharge time, the main discharge time, the amount of pushing after each end face comes into contact with each other, and each end face pushed together. Includes at least one of the later pullback amounts.
- the "image including the end face” is not limited to the image obtained by directly capturing the end face, and also includes an image obtained by capturing the portion including the end portion of the optical fiber from the side surface without the end face directly appearing in the image.
- the method of fusion-bonding the optical fibers includes an image acquisition step, a condition setting step, and a fusion-bonding connection step.
- the image acquisition step acquires an image including each end face of the first and second optical fibers in a state where the end faces of the first and second optical fibers to be connected are arranged to face each other.
- the condition setting step grasps the state of each end face based on the image, and sets the connection condition according to the state of each end face.
- the first and second optical fibers are fused and spliced to each other by electric discharge between the pair of electrode rods according to the connection conditions set by the condition setting step.
- connection conditions are the position of each end face before the start of discharge, the distance between each end face before the start of discharge, the preliminary discharge time, the main discharge time, the amount of pushing after each end face comes into contact with each other, and each end face pushed together. Includes at least one of the later pullback amounts.
- the "image including the end face” is not limited to the image obtained by directly capturing the end face, and also includes an image obtained by capturing the portion including the end portion of the optical fiber from the side surface without the end face directly appearing in the image.
- the connection conditions set according to the state of each end face are the position of each end face before the start of discharge, the distance between each end face before the start of discharge, the preliminary discharge time, and so on. It includes at least one of the main discharge time, the amount of pushing after the end faces are in contact with each other, and the amount of pulling back after pushing each of the end faces.
- more suitable connection conditions are set according to the state of the end face of the optical fiber. Can be done. Therefore, the quality of the fusion spliced connection can be further improved and the connection loss can be reduced.
- connection conditions are at least three of the above position, the above interval, the preliminary discharge time, the main discharge time, the push-in amount, and the pull-back amount. May include one.
- the quality of the fusion splicing can be further improved and the connection loss can be further reduced.
- the above positions are the positions of the end faces with respect to the line connecting the central axes of the pair of electrode rods at the start of the preliminary discharge.
- the pre-discharge time may be the time from the start of the arc discharge to the start of the relative movement of the first and second optical fibers in order to bring the end faces into contact with each other.
- the main discharge time may be the time from when the end faces come into contact with each other until the application of the voltage to the pair of electrode rods is stopped.
- the pushing amount may be the moving distance when the first and second optical fibers are relatively moved in the same direction during discharging after the end faces are brought into contact with each other.
- the pull-back amount is the movement when the first and second optical fibers are relatively moved in the direction in which the end faces are separated from each other during the fusion splicing after the end faces are brought into contact with each other and the end faces are further pushed. It may be a distance.
- the state of each end face may include the position and depth of dents on each end face.
- the state of each end face may include the position and height of the protrusion at the edge of each end face.
- the state of each end face may include the direction and angle of inclination of each end face.
- FIGS. 1 and 2 are perspective views showing the appearance of the optical fiber fusion splicer (hereinafter, simply referred to as a fusion splicer) 10 according to the present embodiment.
- FIG. 1 shows the appearance of the windshield cover in the closed state.
- FIG. 2 shows the appearance of the fusion splicer 10 in a state where the windshield cover is opened and the internal structure of the fusion splicer 10 can be seen.
- the fusion splicer 10 is a device for fusion splicing optical fibers to each other by electric discharge.
- the fusion splicer 10 includes a box-shaped housing 2.
- a fusion splicing portion 3 for fusing the optical fibers to each other and a heater 4 are provided on the upper portion of the housing 2.
- the heater 4 heats and contracts the fiber reinforcing sleeve that covers the fused portion of the optical fiber.
- the fusion splicer 10 further includes a monitor 5, a windshield cover 6, a power switch 7, and a connection start switch 8.
- the monitor 5 displays various information.
- the various information includes, for example, the fusion connection status of the optical fibers captured by the camera arranged inside the housing 2.
- the windshield cover 6 prevents wind from entering the fusion splicing portion 3.
- the power switch 7 is a push button for switching the power on / off of the fusion splicer 10 according to the operation of the user.
- the connection start switch 8 is a push button for starting an operation for fusing the optical fibers to each other according to the operation of the user.
- the fusion splicer 3 has a pair of fiber positioning portions 3a, a pair of electrode rods 3b, and a holder mounting portion on which a pair of optical fiber holders 3c can be mounted. There is.
- Each of the optical fibers to be fused is held and fixed to the optical fiber holder 3c, and each of the optical fiber holders 3c is placed and fixed to the holder mounting portion.
- the fiber positioning portion 3a is arranged between the pair of optical fiber holders 3c, and positions the tip end portion of the optical fiber held in each of the optical fiber holders 3c.
- the electrode rods 3b are arranged between the pair of fiber positioning portions 3a, and the tip of each optical fiber is softened by arc discharge.
- FIG. 3 is a functional block diagram showing the configuration of the internal system included in the fusion splicer 10.
- the fusion splicer 10 includes a fusion control unit 12, a camera 9, and a monitor 5 in addition to the fusion splicing unit 3 described above.
- the camera 9 is an example of the image acquisition unit in the present embodiment.
- the camera 9 is arranged inside the housing 2.
- the camera 9 acquires an image including each end face in a state where the end faces of the two optical fibers to be connected are opposed to each other, and generates image data.
- FIG. 4 is a block diagram showing an example of the hardware configuration of the fusion control unit 12.
- the fusion control unit 12 may be configured as a computer including a CPU 12a, a RAM 12b, and a ROM 12c.
- the fusion control unit 12 reads and writes data to the RAM 12b and the ROM 12c under the control of the CPU 12a while reading and executing the program stored in the ROM 12c in advance.
- the fusion control unit 12 can realize each function of the fusion control unit 12 by this.
- the operating status of the fusion control unit 12 is always displayed on the monitor 5 during the operation of the fusion connector 10.
- the fusion control unit 12 is electrically connected to the connection start switch 8.
- the fusion control unit 12 receives an electric signal from the connection start switch 8.
- the fusion control unit 12 includes a basic control unit 13 and a condition setting unit 14.
- the basic control unit 13 controls the operation of the fusion splicer unit 3.
- the basic control unit 13 receives an operation of the connection start switch 8 by the user and controls the contact operation between the tips of the optical fibers and the arc discharge in the fusion splicing unit 3.
- the contact operation between the tips of the optical fibers includes the positioning process of the optical fibers by the fiber positioning unit 3a, that is, the control of the tip position of each optical fiber.
- Control of arc discharge includes control of discharge power, discharge start timing and discharge end timing.
- Various connection conditions such as the tip position of the optical fiber and the discharge power are stored in, for example, the ROM 12c.
- connection condition is set by the condition setting unit 14.
- the condition setting unit 14 grasps the state of each end face of the two optical fibers based on the image acquired by the camera 9, and sets the connection condition according to the state of each end face.
- a plurality of connection conditions may be prepared in advance, and one of the connection conditions may be selected according to the state of each end face.
- the connection condition may be set by calculating from a predetermined approximate expression set in advance using a specific numerical value obtained according to the state of each end face.
- both may be combined. That is, the reference connection condition prepared in advance is set, and the amount to be changed from the reference connection condition is calculated from a predetermined approximate expression using a specific numerical value obtained according to the state of each end face. It may be set.
- the operation of the fusion splicer 10 of the present embodiment having the above configuration is as follows. First, as shown in FIG. 5, the user holds the optical fiber F1 (first optical fiber) and the optical fiber F2 (second optical fiber) to be connected in the optical fiber holder 3c, respectively. .. Then, the optical fiber holder 3c is placed on the holder mounting portion. At this time, the end face F1a of the optical fiber F1 and the end face F2a of the optical fiber F2 are arranged so as to face each other. Next, the user instructs the fusion splicer 10 to start the fusion splicing. This instruction is given via the connection start switch 8. In response to this instruction, as shown in FIG.
- the basic control unit 13 positions the optical fibers F1 and F2 based on the positions of the end faces F1a and F2a set as the connection conditions. After that, as shown in FIG. 7, the basic control unit 13 starts an arc discharge between the pair of electrode rods 3b.
- the end faces F1a and F2a are separated from each other.
- the arc discharge corresponds to a preliminary discharge for pre-softening the end faces F1a and F2a before fusion.
- the basic control unit 13 controls the position of the fiber positioning unit 3a to bring the end faces F1a and F2a closer to each other and bring them into contact with each other. Then, by continuing the arc discharge (main discharge), the end faces F1a and F2a are further softened and fused to each other.
- FIG. 8 is a view of the end surface F2a of one of the optical fibers F2 as viewed from the front (in the optical axis direction).
- the arrows MSX and MSY in the figure indicate the observation directions by the camera 9, respectively. That is, in this example, at least two cameras 9 are installed, and the two cameras 9 image the end faces F1a and F2a from the directions MSX and MSY that are orthogonal to each other.
- the directions MSX and MSY intersect the optical axis directions of the optical fibers F1 and F2, and are orthogonal to each other in one example.
- a light source 11 for illuminating the optical fibers F1 and F2 is arranged at a position facing the camera 9 with the optical fibers F1 and F2 interposed therebetween.
- a chip (dent) A is generated at the position shown in FIG. 8 on the end face F2a.
- the chip A of the end face F2a clearly appears in the image PY obtained by the camera 9 imaged from the direction MSY.
- the position and size (depth) of the chip A on the end face F2a can be analyzed based on two images obtained from the two cameras 9 taken from the directions MSX and MSY, respectively.
- the positions and shapes of the optical fibers F1 and F2 are confirmed by the contours of at least one of the core CR and the clad CL.
- the core CR is brightened by the illumination light from the light source 11
- the clad CL is darkened by the refraction of the illumination light from the light source 11.
- FIG. 10 is a view of the end surface F2a of one of the optical fibers F2 as viewed from the front (optical axis direction). It is assumed that a protrusion (lip) B at the edge is generated at the position shown in FIG. 10 on the end surface F2a. Then, as shown in FIG. 11, the lip B protruding from the edge of the end face F2a clearly appears in the image PY obtained by the camera 9 imaged from the direction MSY. The position and size (height) of the lip B on the end face F2a can be analyzed based on two images obtained from the two cameras 9 taken from the directions MSX and MSY, respectively.
- FIG. 12 is a view of the end surface F2a of one of the optical fibers F2 as viewed from the front (optical axis direction), and the inclination of the end surface F2a in the optical axis direction is represented by shades of color. That is, the darker the color, the farther it is from the opposite end face F1a, and the lighter the color, the closer it is to the opposite end face F1a. In this way, it is assumed that the end face F2a is inclined in the direction shown in FIG. Then, as shown in FIG. 13, the inclination of the end face F2a clearly appears in the image PX obtained by the camera 9 imaged from the direction MSX.
- the direction and magnitude (angle) of the inclination of the end face F2a can be analyzed based on two images obtained from the two cameras 9 imaged from the directions MSX and MSY, respectively.
- connection conditions set according to the states of the end faces F1a and F2a of the optical fibers F1 and F2 will be described in detail.
- the connection conditions set according to the states of the end faces F1a and F2a are (1) the positions of the end faces F1a and F2a before the start of discharge, and (2) the end faces F1a and F2a before the start of discharge.
- Interval (3) Preliminary discharge time, (4) Main discharge time, (5) Pushing amount after each end face F1a, F2a is in contact, and (6) After pushing each end face F1a, F2a. It contains at least one, more preferably three or more, of the withdrawal amounts.
- Positions of the end faces F1a and F2a before the start of discharge are the states shown in FIG. 14, that is, the positions of the pair of electrode rods 3b at the start of pre-discharge.
- the amount of heating increases or decreases as the distance between the discharge center and each of the end faces F1a and F2a changes according to the end face positions X1 and X2.
- the time required for movement until the end faces F1a and F2a come into contact with each other changes according to the end face positions X1 and X2.
- the end face positions X1 are predetermined so that there is no abnormality in the predetermined end face reference positions, that is, the end faces F1a and F2a.
- the end face F1a or F2a having the chip A is brought closer to the discharge center axis E as compared with the optimum value of X2.
- the end face position X1 or X2 with respect to the discharge center axis E is reduced.
- the end face position X1 or X2 is set to, for example, about 70% of the end face reference position. Thereby, the connection loss can be reduced.
- the condition setting unit 14 calculates the end face positions X1 and X2 with respect to the discharge center axis E by a predetermined calculation formula based on the depth of the chip A obtained from the image.
- the maximum value of the end surface position X1 or X2 of the lip B or the end surface F1a or F2a having an inclination is made to match a predetermined end face reference position. Thereby, the connection loss can be reduced.
- the condition setting unit 14 calculates the end face position X1 or X2 by a predetermined calculation formula based on the maximum value Xa and the minimum value Xb obtained from the image.
- the end face spacing reference value is an optimum value of the spacing D, which is predetermined so that there is no abnormality in the end faces F1a and F2a.
- the interval D is, for example, about 70% of the end face interval reference value.
- the condition setting unit 14 calculates the interval D by a predetermined calculation formula based on the depth of the chip A obtained from the image.
- the median value of the difference between the maximum distance Da and the minimum distance Db between the end faces F1a and F2a is determined. Match the end face spacing reference value. Thereby, the connection loss can be reduced.
- the condition setting unit 14 calculates the interval D by a predetermined formula based on the difference between the maximum interval Da and the minimum interval Db obtained from the image.
- the pre-discharge time is the relative movement of the optical fibers F1 and F2 in order to bring the end faces F1a and F2a into contact with each other after starting the arc discharge in the state shown in FIG. The time to start.
- the depth of the chip A shown in FIG. 9 is a predetermined value (for example, 10 ⁇ m) or more, for example, by making the preliminary discharge time longer than the predetermined reference time, the end faces F1a and F2a are chipped when they come into contact with each other.
- the connection loss can be reduced by making A small (shallow).
- the reference time is an optimum length of the preliminary discharge time, which is predetermined as assuming that there is no abnormality in the end faces F1a and F2a.
- the pre-discharge time is, for example, 1.3 times or more and twice or less the reference time.
- the condition setting unit 14 calculates the preliminary discharge time by a predetermined calculation formula based on the depth of the chip A obtained from the image.
- the pre-discharge time is made longer than the predetermined reference time.
- the preliminary discharge time is, for example, 1.3 times or more and 2 times or less the reference time.
- the condition setting unit 14 calculates the preliminary discharge time by a predetermined calculation formula based on the protrusion amount or the inclination angle of the lip B obtained from the image.
- the main discharge time is the time from when the end faces F1a and F2a come into contact with each other until the end of the arc discharge.
- the present discharge time is the time from when the end faces F1a and F2a come into contact with each other until the application of the voltage to the pair of electrode rods 3b is stopped.
- the pre-discharge and the main discharge are performed continuously in time.
- the chip A shown in FIG. 9 is present on the end faces F1a or F2a, the axial deviation progresses during the fusion splicing starting from the chip A. Therefore, for example, by making the main discharge time shorter than the predetermined reference time, the amount of shaft misalignment can be reduced and the connection loss can be reduced.
- the reference time is the optimum length of the main discharge time, which is predetermined as assuming that there is no abnormality in the end faces F1a and F2a.
- the main discharge time is, for example, 30% or more and 70% or less of the reference time.
- the condition setting unit 14 calculates the main discharge time by a predetermined calculation formula based on the depth of the chip A obtained from the image. Even when either the lip B shown in FIG. 11 or the end face F2a shown in FIG. 13 is inclined, the outer edge portion farthest from the end face on the other side, in other words, the most retracted outer edge portion on the end face is used as the starting point. Axis misalignment progresses during fusion splicing.
- the condition setting unit 14 calculates the main discharge time by a predetermined calculation formula based on the protrusion amount or the inclination angle of the lip B obtained from the image.
- Push-in amount after the end faces F1a and F2a are in contact with each other means that the optical fibers F1 and F2 are relatively moved from the state shown in FIG. It refers to the moving distance when the optical fibers F1 and F2 are relatively moved in the same direction during discharging after the end faces F1a and F2a are brought into contact with each other.
- the chip A shown in FIG. 9 is present on the end faces F1a or F2a, the axial deviation progresses during the fusion splicing starting from the chip A.
- the reference push-in amount is an optimum value of the push-in amount, which is predetermined as assuming that there is no abnormality in the end faces F1a and F2a.
- the pushing amount is, for example, 150% or more of the reference time.
- the condition setting unit 14 calculates the pushing amount by a predetermined calculation formula based on the depth of the chip A obtained from the image. When either the lip B shown in FIG. 11 or the inclination of the end face F2a shown in FIG. 13 is present, there is a variation in the interval D within the end face.
- the condition setting unit 14 calculates the pushing amount by a predetermined calculation formula based on the protrusion amount or the inclination angle of the lip B obtained from the image.
- the calculated push-in amount includes the case where the push-in amount is zero, that is, the case where the push-in is not performed.
- the pullback amount after pushing the end faces F1a and F2a together is the pullback amount after the end faces F1a and F2a are brought into contact with each other and then the end faces F1a and F2a are further pressed. It refers to the moving distance when the optical fibers F1 and F2 are relatively moved in the opposite direction during the fusion splicing after being pushed in, that is, in the direction in which the end faces F1a and F2a are separated from each other.
- the above-mentioned pushing amount may become non-uniform in the cross section orthogonal to the central axis of the optical fibers F1 and F2. If it becomes non-uniform, the core portion may be deformed and the connection loss may increase. Therefore, for example, the connection loss can be reduced by pulling back 20% or more of the pushing amount.
- the condition setting unit 14 calculates the pullback amount by a predetermined calculation formula based on the depth of the chip A obtained from the image. Even when either the lip B shown in FIG. 11 or the end face F2a shown in FIG. 13 is inclined, the above-mentioned pushing amount may be non-uniform in the end face.
- the condition setting unit 14 calculates the pullback amount by a predetermined calculation formula based on the protrusion amount or the inclination angle of the lip B obtained from the image.
- the calculated pullback amount includes the case where the pullback amount is zero, that is, the case where the pullback is not performed.
- connection conditions set according to the states of the end faces F1a and F2a may include the following (7) preliminary discharge power.
- (7) Preliminary discharge power The pre-discharge power is the relative movement of the optical fibers F1 and F2 in order to bring the end faces F1a and F2a into contact with each other after starting the arc discharge in the state shown in FIG. The arc discharge power in the period until the start.
- the depth of the chip A shown in FIG. 9 is a predetermined value (for example, 10 ⁇ m) or more, for example, the preliminary discharge power is made larger than the reference value of the predetermined preliminary discharge power.
- the reference value of the preliminary discharge power is an optimum value of the preliminary discharge power, which is predetermined as assuming that there is no abnormality in the end faces F1a and F2a.
- the condition setting unit 14 calculates the preliminary discharge power by a predetermined calculation formula based on the depth of the chip A obtained from the image. When either the lip B shown in FIG. 11 or the end face F2a shown in FIG. 13 is inclined, for example, the preliminary discharge power is made larger than the reference value.
- the condition setting unit 14 calculates the preliminary discharge power by a predetermined calculation formula based on the protrusion amount or the inclination angle of the lip B obtained from the image.
- the states of the end faces F1a and F2a of the two optical fibers F1 and F2 are analyzed and grasped based on the respective observation images. ..
- the connection conditions are set according to the states of the end faces F1a and F2a. That is, as a result of analyzing the states of the end faces F1a and F2a, if there is no abnormality in any of the end faces F1a and F2a, a predetermined connection condition as a reference is set.
- FIG. 15 is a flowchart showing a fusion splicing method according to the present embodiment.
- This fusion splicing method can be suitably realized by using the fusion splicing machine 10 described above.
- the image acquisition step S1 in a state where the end faces F1a and F2a of the optical fibers F1 and F2 to be connected are arranged to face each other (see FIG. 6), an image including the end faces F1a and F2a is acquired by the camera 9. do.
- each end face After grasping the state of each end face F1a, F2a, for example, the presence / absence of at least one of the chipped A, the lip B, and the end face inclination and the size thereof based on the acquired image, each end face
- the connection conditions are set according to the states of F1a and F2a.
- the connection conditions set according to the states of the end faces F1a and F2a are (1) the positions of the end faces F1a and F2a before the start of discharge, and (2) the end faces F1a and F2a before the start of discharge.
- connection condition may further include the above-mentioned (7) preliminary discharge power.
- the states of the end faces F1a and F2a of the two optical fibers F1 and F2 are analyzed and grasped based on the respective observation images. Then, the connection conditions are set according to the states of the end faces F1a and F2a. That is, as a result of analyzing the states of the end faces F1a and F2a, if there is no abnormality in any of the end faces F1a and F2a, a predetermined connection condition as a reference is set.
- connection condition is different from the standard predetermined connection condition depending on the state of the end face having the abnormality.
- connection conditions set according to the states of the end faces F1a and F2a are (1) the positions of the end faces F1a and F2a before the start of discharge, and (2). ) The distance between the end faces F1a and F2a before the start of discharge, (3) the preliminary discharge time, (4) the main discharge time, (5) the amount of pushing after the end faces F1a and F2a are in contact with each other, and (6). It includes at least one of the pull-back amounts after pushing the end faces F1a and F2a into each other.
- connection conditions set according to the states of the end faces F1a and F2a may include at least three of the above (1) to (6). In this case, the quality of the fusion splicing can be further improved and the connection loss can be further reduced.
- optical fiber fusion splicer and the method for fusion-connecting optical fibers according to the present disclosure are not limited to the above-described embodiment, and various other modifications are possible.
- three states of chipping, lip, and inclination are exemplified as the end face state of the optical fiber, but various states other than these are used as the end face state of the optical fiber which is a judgment material when setting the connection condition. May be included.
- the connection conditions set according to the states of the end faces F1a and F2a may include other conditions in addition to at least one of the above (1) to (6).
- connection conditions include, for example, the relative amount of misalignment of the optical fibers F1 and F2, the time interval between each discharge when intermittently discharging, and the like.
- This discharge power may be included in the connection conditions, or may be constant regardless of the end face state of the optical fiber.
- the connection conditions set according to the states of the end faces F1a and F2a of the optical fibers F1 and F2 are the amount of change from the reference connection conditions according to the states of the end faces F1a and F2a together with the reference connection conditions. Including those that set.
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Abstract
Description
光ファイバの融着接続を行う際には、放電パワー及び光ファイバの先端の位置といった接続条件を設定する。この接続条件次第で、融着接続の品質が変化し、融着部分における伝送損失の増加量(接続損失)が増減する。好適な接続条件は、光ファイバの端面の状態に応じて変化する。
本開示によれば、融着接続の品質を高めることができる光ファイバの融着接続機及び光ファイバを融着接続する方法を提供することが可能となる。
最初に、本開示の実施形態を列記して説明する。一実施形態に係る光ファイバの融着接続機は、画像取得部と、条件設定部と、融着接続部と、を備える。画像取得部は、接続対象である第1及び第2の光ファイバの端面同士が対向配置された状態において、第1及び第2の光ファイバの各端面を含む画像を取得する。条件設定部は、画像に基づいて各端面の状態を把握し、各端面の状態に応じて接続条件を設定する。融着接続部は、条件設定部により設定された接続条件に従って、一対の電極棒間の放電によって第1及び第2の光ファイバを互いに融着接続する。接続条件は、放電開始前における各端面の位置、放電開始前における各端面同士の間隔、予備放電時間、本放電時間、各端面同士が接した後の押し込み量、及び、各端面同士を押し込んだ後の引き戻し量のうち少なくとも一つを含む。ここで「端面を含む画像」は、端面を直接撮像した画像に限られるものではなく、端面が直接画像に現れておらず光ファイバの端部を含む部分を側面から撮像した画像も含む。
本開示の光ファイバの融着接続機及び光ファイバを融着接続する方法の具体例を、以下に図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。以下の説明では、図面の説明において同一の要素には同一の符号を付し、重複する説明を省略する。
放電開始前における各端面F1a,F2aの位置とは、図14に示された状態、すなわち予備放電の開始時点における、一対の電極棒3bの中心軸を結ぶ線(放電中心軸)Eを基準とした各端面F1a,F2aの位置X1,X2をいう。これらの端面位置X1,X2に応じて、放電中心と各端面F1a,F2aとの距離が変わることにより加熱量(溶融量)が増減する。加えて、これらの端面位置X1,X2に応じて、端面F1a,F2a同士が当接するまでの移動に要する時間が変化する。
放電開始前における各端面F1a,F2a同士の間隔とは、図6に示された状態、すなわち予備放電の開始時点における端面F1a,F2a同士の間隔Dをいう。この間隔Dに応じて、端面F1a,F2a同士が当接するまでの移動に要する時間が変化する。図9に示す欠けAの深さが所定値(例えば10μm)以上の場合には、例えば、所定の端面間隔基準値よりも間隔Dを小さくすることにより、接続損失を低減することができる。端面間隔基準値とは、端面F1a,F2aに異常が無いものとして予め定められた、間隔Dの最適値である。間隔Dは、例えば端面間隔基準値の7割程度とされる。この場合、条件設定部14は、画像から求められる欠けAの深さに基づいて、所定の計算式により間隔Dを算出する。図11に示すリップB、及び図13に示す端面F2aの傾斜のいずれかが存在する場合には、例えば、端面F1a,F2a同士の最大間隔Daと最小間隔Dbとの差の中央値を所定の端面間隔基準値と一致させる。これにより、接続損失を低減することができる。この場合、条件設定部14は、画像から求められる最大間隔Daと最小間隔Dbとの差に基づいて、所定の計算式により間隔Dを算出する。
予備放電時間とは、図6に示された状態でアーク放電を開始してから、端面F1a,F2a同士を当接させるために光ファイバF1,F2の相対的な移動を開始するまでの時間をいう。図9に示す欠けAの深さが所定値(例えば10μm)以上の場合には、例えば、所定の基準時間よりも予備放電時間を長くすることにより、端面F1a,F2aが互いに当接する際に欠けAを小さく(浅く)して、接続損失を低減することができる。基準時間とは、端面F1a,F2aに異常が無いものとして予め定められた、予備放電時間の最適長さである。予備放電時間は、例えば基準時間の1.3倍以上2倍以下とされる。この場合、条件設定部14は、画像から求められる欠けAの深さに基づいて、所定の計算式により予備放電時間を算出する。図11に示すリップB、及び図13に示す端面F2aの傾斜のいずれかが存在する場合にも、例えば、所定の基準時間よりも予備放電時間を長くする。これにより、端面F1a,F2aが互いに当接する際にリップB若しくは傾斜を小さくして、接続損失を低減することができる。このとき、予備放電時間は例えば基準時間の1.3倍以上2倍以下とされる。この場合、条件設定部14は、画像から求められるリップBの突出量又は傾斜の角度に基づいて、所定の計算式により予備放電時間を算出する。
本放電時間とは、端面F1a,F2a同士が当接してから、アーク放電を終了するまでの時間をいう。言い換えると、本放電時間とは、端面F1a,F2a同士が当接してから、一対の電極棒3bへの電圧の印加を停止するまでの時間である。予備放電と本放電とは、時間的に連続して行われる。図9に示す欠けAが端面F1a又はF2aに存在する場合、欠けAを起点として融着接続中に軸ずれが進行する。したがって、例えば、所定の基準時間よりも本放電時間を短くすることにより、軸ずれ量を小さくして、接続損失を低減することができる。基準時間とは、端面F1a,F2aに異常が無いものとして予め定められた、本放電時間の最適長さである。本放電時間は、例えば基準時間の30%以上70%以下とされる。この場合、条件設定部14は、画像から求められる欠けAの深さに基づいて、所定の計算式により本放電時間を算出する。図11に示すリップB、及び図13に示す端面F2aの傾斜のいずれかが存在する場合にも、相手側の端面から最も離れた、言い換えると、その端面において最も後退した外縁部を起点として、融着接続中に軸ずれが進行する。したがって、例えば、所定の基準時間よりも本放電時間を短くすることにより、軸ずれ量を小さくして、接続損失を低減することができる。本放電時間は、例えば基準時間の30%以上70%以下とされる。この場合、条件設定部14は、画像から求められるリップBの突出量又は傾斜の角度に基づいて、所定の計算式により本放電時間を算出する。
各端面F1a,F2a同士が接した後の押し込み量とは、図6に示された状態から光ファイバF1,F2を相対的に移動させて端面F1a,F2a同士を当接させてから、放電中において更に同じ向きに光ファイバF1,F2を相対的に移動させる際の移動距離をいう。図9に示す欠けAが端面F1a又はF2aに存在する場合、欠けAを起点として融着接続中に軸ずれが進行する。したがって、例えば、所定の基準押し込み量よりも押し込み量を大きくすることにより、融着接続中の軸ずれの進行を抑えて、接続損失を低減することができる。基準押し込み量とは、端面F1a,F2aに異常が無いものとして予め定められた、押し込み量の最適値である。押し込み量は、例えば基準時間の150%以上とされる。この場合、条件設定部14は、画像から求められる欠けAの深さに基づいて、所定の計算式により押し込み量を算出する。図11に示すリップB、及び図13に示す端面F2aの傾斜のいずれかが存在する場合、端面内において間隔Dにばらつきが存在する。したがって、例えば、押し込み量を基準押し込み量よりも大きくすることにより、間隔Dの面内ばらつきの影響を抑え、接続損失を低減することができる。このとき、押し込み量は例えば基準押し込み量の120%以上とされる。この場合、条件設定部14は、画像から求められるリップBの突出量又は傾斜の角度に基づいて、所定の計算式により押し込み量を算出する。算出される押し込み量には、押し込み量がゼロである場合、すなわち押し込みを行わない場合も含まれる。
各端面F1a,F2a同士を押し込んだ後の引き戻し量とは、端面F1a,F2a同士を当接させた後、更に端面F1a,F2aを押し込んでから、融着接続中において逆向き、すなわち端面F1a,F2a同士が離れる向きに光ファイバF1,F2を相対的に移動させる際の移動距離をいう。図9に示す欠けAが端面F1a又はF2aに存在する場合、上述した押し込み量が、光ファイバF1,F2の中心軸と直交する断面内において不均一となるおそれがある。不均一となった場合にはコア部が変形し、接続損失が増大する場合がある。したがって、例えば、押し込み量の2割以上の引き戻しを実施することによって、接続損失を低減することができる。この場合、条件設定部14は、画像から求められる欠けAの深さに基づいて、所定の計算式により引き戻し量を算出する。図11に示すリップB、及び図13に示す端面F2aの傾斜のいずれかが存在する場合にも、上述した押し込み量が端面内において不均一となるおそれがある。不均一となった場合にはコア部の変形により接続損失が増大する場合がある。したがって、例えば、押し込み量の2割以上の引き戻しを実施することによって、接続損失を低減することができる。この場合、条件設定部14は、画像から求められるリップBの突出量又は傾斜の角度に基づいて、所定の計算式により引き戻し量を算出する。算出される引き戻し量には、引き戻し量がゼロである場合、すなわち引き戻しを行わない場合も含まれる。
(7)予備放電パワー
予備放電パワーとは、図6に示された状態でアーク放電を開始してから、端面F1a,F2a同士を当接させるために光ファイバF1,F2の相対的な移動を開始するまでの期間におけるアーク放電パワーをいう。図9に示す欠けAの深さが所定値(例えば10μm)以上の場合には、例えば、所定の予備放電パワーの基準値よりも予備放電パワーを大きくする。これにより、端面F1a,F2aの軟化の程度が大きくなるので、互いに当接する際に欠けAを小さく(浅く)して、接続損失を低減することができる。予備放電パワーの基準値とは、端面F1a,F2aに異常が無いものとして予め定められた、予備放電パワーの最適値である。この場合、条件設定部14は、画像から求められる欠けAの深さに基づいて、所定の計算式により予備放電パワーを算出する。図11に示すリップB、及び図13に示す端面F2aの傾斜のいずれかが存在する場合には、例えば、予備放電パワーを基準値よりも大きくする。これにより、端面F1a,F2aが互いに当接する際にリップB若しくは傾斜を小さくして、接続損失を低減することができる。このとき、予備放電パワーは、例えば基準値の1.3倍以上2倍以下とされる。この場合、条件設定部14は、画像から求められるリップBの突出量又は傾斜の角度に基づいて、所定の計算式により予備放電パワーを算出する。
3…融着接続部
3a…ファイバ位置決め部
3b…電極棒
3c…光ファイバホルダ
4…加熱器
5…モニタ
6…風防カバー
7…電源スイッチ
8…接続開始スイッチ
9…カメラ
10…融着接続機
12…融着制御部
12a…CPU
12b…RAM
12c…ROM
13…基本制御部
14…条件設定部
A…欠け
B…リップ
CL…クラッド
CR…コア
D…間隔
Da…最大間隔
Db…最小間隔
F1…第1の光ファイバ
F1a…端面
F2…第2の光ファイバ
F2a…端面
MSX,MSY…方向
PX,PY…画像
Claims (12)
- 接続対象である第1及び第2の光ファイバの端面同士が対向配置された状態において、前記第1及び第2の光ファイバの各端面を含む画像を取得する画像取得部と、
前記画像に基づいて前記各端面の状態を把握し、前記各端面の状態に応じて接続条件を設定する条件設定部であって、前記接続条件は、放電開始前における前記各端面の位置、放電開始前における前記各端面同士の間隔、予備放電時間、本放電時間、前記各端面同士が接した後の押し込み量、及び、前記各端面同士を押し込んだ後の引き戻し量のうち少なくとも一つを含む条件設定部と、
前記条件設定部により設定された前記接続条件に従って、一対の電極棒間の放電によって前記第1及び第2の光ファイバを互いに融着接続する融着接続部と、
を備える、光ファイバの融着接続機。 - 前記接続条件は、前記位置、前記間隔、前記予備放電時間、前記本放電時間、前記押し込み量、及び前記引き戻し量のうち少なくとも三つを含む、請求項1に記載の光ファイバの融着接続機。
- 前記接続条件は、前記位置を含み、
前記位置は、予備放電の開始時点における、前記一対の電極棒の中心軸を結ぶ線を基準とした前記各端面の位置である、請求項1または請求項2に記載の光ファイバの融着接続機。 - 前記接続条件は、前記予備放電時間を含み、
前記予備放電時間は、アーク放電を開始してから、前記各端面同士を当接させるために前記第1及び第2の光ファイバの相対的な移動を開始するまでの時間である、請求項1から請求項3のいずれか1項に記載の光ファイバの融着接続機。 - 前記接続条件は、前記本放電時間を含み、
前記本放電時間は、前記各端面同士が当接してから、前記一対の電極棒への電圧の印加を停止するまでの時間である、請求項1から請求項4のいずれか1項に記載の光ファイバの融着接続機。 - 前記接続条件は、前記押し込み量を含み、
前記押し込み量は、前記各端面同士が当接してから、放電中において更に同じ向きに前記第1及び第2の光ファイバを相対的に移動させる際の移動距離である、請求項1から請求項5のいずれか1項に記載の光ファイバの融着接続機。 - 前記接続条件は、前記引き戻し量を含み、
前記引き戻し量は、前記各端面同士が当接した後、更に前記各端面を押し込んでから、融着接続中において前記各端面同士が離れる向きに前記第1及び第2の光ファイバを相対的に移動させる際の移動距離である、請求項1から請求項6のいずれか1項に記載の光ファイバの融着接続機。 - 前記各端面の状態は、前記各端面の凹みの発生位置及び深さを含む、請求項1から請求項7のいずれか1項に記載の光ファイバの融着接続機。
- 前記各端面の状態は、前記各端面の縁部の出っ張りの発生位置及び高さを含む、請求項1から請求項8のいずれか1項に記載の光ファイバの融着接続機。
- 前記各端面の状態は、前記各端面の傾斜の向き及び角度を含む、請求項1から請求項9のいずれか1項に記載の光ファイバの融着接続機。
- 接続対象である第1及び第2の光ファイバの端面同士が対向配置された状態において、前記第1及び第2の光ファイバの各端面を含む画像を取得するステップと、
前記画像に基づいて前記各端面の状態を把握し、前記各端面の状態に応じて接続条件を設定ステップであって、前記接続条件は、放電開始前における前記各端面の位置、放電開始前における前記各端面同士の間隔、予備放電時間、本放電時間、前記各端面同士が接した後の押し込み量、及び、前記各端面同士を押し込んだ後の引き戻し量のうち少なくとも一つを含むステップと、
前記接続条件を設定するステップにより設定された前記接続条件に従って、一対の電極棒間の放電によって前記第1及び第2の光ファイバを互いに融着接続するステップと、
を含む、光ファイバを融着接続する方法。 - 前記接続条件は、前記位置、前記間隔、前記予備放電時間、前記本放電時間、前記押し込み量、及び前記引き戻し量のうち少なくとも三つを含む、請求項11に記載の光ファイバを融着接続する方法。
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EP21753988.1A EP4105697A4 (en) | 2020-02-13 | 2021-01-18 | OPTICAL FIBERS SPLICERS AND OPTICAL FIBERS FUSION SPLICING METHOD |
CN202180012309.0A CN115039005A (zh) | 2020-02-13 | 2021-01-18 | 光纤的熔接机以及熔接光纤的方法 |
US17/760,210 US20230038405A1 (en) | 2020-02-13 | 2021-01-18 | Optical fiber fusion splicer and method for fusion splicing optical fiber |
JP2022500284A JPWO2021161724A1 (ja) | 2020-02-13 | 2021-01-18 | |
KR1020227028878A KR20220131303A (ko) | 2020-02-13 | 2021-01-18 | 광섬유의 융착 접속기 및 광섬유를 융착 접속하는 방법 |
BR112022014014A BR112022014014A2 (pt) | 2020-02-13 | 2021-01-18 | Splicer de fusão de fibra óptica e método para realizar splicing por fusão de fibra óptica |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10206670A (ja) * | 1997-01-10 | 1998-08-07 | Siemens Ag | 少なくとも2つの光導波ファイバ端部を熱溶着する方法並びに装置 |
JPH11119049A (ja) * | 1997-08-27 | 1999-04-30 | Siemens Ag | 光ファイバの熱融着接続方法及び装置 |
JP2005031439A (ja) | 2003-07-14 | 2005-02-03 | Fujikura Ltd | 光ファイバ端面処理方法及びその装置並びに光ファイバ融着接続方法及びその装置 |
US20070081772A1 (en) * | 2003-10-10 | 2007-04-12 | Future Instrument Fiber Optics Ab | Automatic current selection for single fiber splicing |
JP2020020997A (ja) * | 2018-08-02 | 2020-02-06 | 古河電気工業株式会社 | 融着接続システム、融着接続機及び光ファイバ種判別方法 |
JP2020022287A (ja) | 2018-08-01 | 2020-02-06 | 株式会社デンソー | 電力変換装置 |
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JP5484598B2 (ja) * | 2011-01-24 | 2014-05-07 | 株式会社フジクラ | 融着接続装置及び融着接続方法 |
CN107632344B (zh) * | 2017-11-02 | 2020-03-06 | 一诺仪器(中国)有限公司 | 光纤熔接机的光纤端面推进控制方法及系统 |
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- 2021-01-18 CN CN202180012309.0A patent/CN115039005A/zh active Pending
- 2021-01-18 EP EP21753988.1A patent/EP4105697A4/en active Pending
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10206670A (ja) * | 1997-01-10 | 1998-08-07 | Siemens Ag | 少なくとも2つの光導波ファイバ端部を熱溶着する方法並びに装置 |
JPH11119049A (ja) * | 1997-08-27 | 1999-04-30 | Siemens Ag | 光ファイバの熱融着接続方法及び装置 |
JP2005031439A (ja) | 2003-07-14 | 2005-02-03 | Fujikura Ltd | 光ファイバ端面処理方法及びその装置並びに光ファイバ融着接続方法及びその装置 |
US20070081772A1 (en) * | 2003-10-10 | 2007-04-12 | Future Instrument Fiber Optics Ab | Automatic current selection for single fiber splicing |
JP2020022287A (ja) | 2018-08-01 | 2020-02-06 | 株式会社デンソー | 電力変換装置 |
JP2020020997A (ja) * | 2018-08-02 | 2020-02-06 | 古河電気工業株式会社 | 融着接続システム、融着接続機及び光ファイバ種判別方法 |
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Title |
---|
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CN115039005A (zh) | 2022-09-09 |
KR20220131303A (ko) | 2022-09-27 |
JPWO2021161724A1 (ja) | 2021-08-19 |
BR112022014014A2 (pt) | 2022-10-11 |
US20230038405A1 (en) | 2023-02-09 |
EP4105697A1 (en) | 2022-12-21 |
EP4105697A4 (en) | 2023-08-02 |
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