WO2011086415A2 - Dispositif de détection de ligne active - Google Patents

Dispositif de détection de ligne active Download PDF

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Publication number
WO2011086415A2
WO2011086415A2 PCT/IB2010/003366 IB2010003366W WO2011086415A2 WO 2011086415 A2 WO2011086415 A2 WO 2011086415A2 IB 2010003366 W IB2010003366 W IB 2010003366W WO 2011086415 A2 WO2011086415 A2 WO 2011086415A2
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WO
WIPO (PCT)
Prior art keywords
light
light receiving
optical fiber
receiving element
optical
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Application number
PCT/IB2010/003366
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English (en)
Japanese (ja)
Other versions
WO2011086415A3 (fr
Inventor
直哉 松尾
下村　勉
島谷　賢一
天谷　英俊
Original Assignee
パナソニック電工株式会社
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Application filed by パナソニック電工株式会社 filed Critical パナソニック電工株式会社
Publication of WO2011086415A2 publication Critical patent/WO2011086415A2/fr
Publication of WO2011086415A3 publication Critical patent/WO2011086415A3/fr

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Classifications

    • 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
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2852—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using tapping light guides arranged sidewardly, e.g. in a non-parallel relationship with respect to the bus light guides (light extraction or launching through cladding, with or without surface discontinuities, bent structures)
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/35—Testing of optical devices, constituted by fibre optics or optical waveguides in which light is transversely coupled into or out of the fibre or waveguide, e.g. using integrating spheres
    • 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
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4202—Packages, e.g. shape, construction, internal or external details for coupling an active element with fibres without intermediate optical elements, e.g. fibres with plane ends, fibres with shaped ends, bundles

Definitions

  • the present invention relates to a hot-line detection device that detects whether or not an optical line formed by connecting one ends of two optical fibers is in a live-line state.
  • BACKGROUND ART Conventionally, an optical fiber is bent as an active line detection device that detects whether or not an optical line formed by an optical fiber used for optical communication or the like is in a live line state (a state in which light is normally transmitted).
  • a hot-line detection device that does not need to be operated (see, for example, Patent Document 1).
  • Patent Document 1 discloses a fusion reinforcement sleeve that protects a fused portion between one end of two optical fibers / fibers in an optical line formed by connecting two optical fibers as a live line detection device. And a light receiving element which is provided outside the fusion reinforcing sleeve and detects light leaking from the fusion part through the fusion reinforcing sleeve.
  • This hot-wire detection device determines that the signal is photoelectrically converted by the light-receiving element and is in a hot-wire state (light is normally transmitted) if the signal is equal to or higher than a preset reference value. If it is, it is determined that it is not in a live state (light is not transmitted normally).
  • this live line detection device it is possible to detect whether or not the optical line is in a live line state without bending the optical fiber. Therefore, the optical fiber may be broken or temporarily damaged by bending the optical fiber. There is a feature that there is no problem such as generation of a transmission error due to a large increase in transmission loss.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2 0 0 7-8 5 9 3 4 (paragraph 0 0 8 9-0 0 9 6, FIG. 4) Summary of the Invention
  • the above-mentioned fused portion is used in order to minimize the connection loss caused by the axial misalignment and angular misalignment between the two optical fibers.
  • the connection loss at 1 is about 0.2 dB at the wavelength 1 3 1 0 0! ⁇ .
  • the range of the intensity of light propagating through an optical fiber (hereinafter referred to as “light intensity j”) is wide, and when the light intensity is low, it may be about 1 2 O dBM.
  • the light intensity of the light leaking from the fused part becomes very small, and the light receiving element installed outside the fusion reinforcing sleeve is separated from the fused part, so that the light receiving efficiency of the light receiving element is improved. Since the amount of light reaching the light receiving surface of the light receiving element is low and the SZN ratio is small, it may be difficult to detect a live line state.
  • an object of the present invention is to provide a hot-line detection device that can detect a hot-line state stably even when the light intensity of light propagating through an optical fiber is low.
  • a hot-wire detection device for detecting whether or not an optical line formed by connecting one end of two optical fibers is in a live state, the two optical fibers A light leakage generator that leaks part of the light propagating in the core of one optical fiber to the cladding of the other optical fiber, and a light leaked by the light leakage generator incident from the light receiving surface.
  • a light receiving element to detect a light receiving element made of a material transparent to the light leaked from the light leak generation unit, and a light transmission layer interposed between the other optical fiber, the light transmission layer having a light leakage
  • a light guide for guiding the light leaked at the generator to the light receiving element is formed between the outer peripheral surface of the other optical fiber and the light receiving surface of the light receiving element, and the light receiving element generates light leakage on the light receiving surface. Inclined with respect to the outer peripheral surface of the other optical fiber Hot line detection device is provided which is disposed to be.
  • the light transmission layer forms the light guide path for guiding the light leaked by the light leakage generation unit to the light receiving element between the outer peripheral surface of the fiber and the light receiving surface of the light receiving element.
  • Light leaked from the generator can be efficiently guided to the light receiving element through the light guide.
  • a light leakage generator is provided at the connection between the two optical fibers to leak a part of the light propagating in the core of one optical fiber to the clad of the other optical fiber. Compared to the case where the ends of the fiber are fused to minimize the connection loss, the light intensity of the leaked light is increased and the light intensity received by the light receiving element is increased.
  • the live line state can be detected stably. Furthermore, since the light receiving surface of the light receiving element faces the light leakage generating part side, the light receiving area of the light receiving element is substantially increased, and the light leaked from the light leakage generating part can be detected more stably by the light receiving element. .
  • a prism transparent to the light leaked by the light leakage generating unit is interposed, and the light transmission layer is formed on one surface of the prism.
  • optical fiber And between the other surface of the prism and the light receiving element.
  • the inclination angle of the light receiving surface of the light receiving element can be set by the shape of the prism, and the light receiving efficiency at the light receiving element can be accurately determined.
  • a live line detection device for detecting whether or not an optical line formed by connecting one ends of two optical fibers is in a live line state, comprising two optical fibers A light leakage generator that leaks part of the light propagating in the core of one optical fiber to the cladding of the other optical fiber, and a light leaked by the light leakage generator incident from the light receiving surface.
  • a light guide for guiding the light leaked from the light to the light receiving element Serial other active ray detector to be formed between the outer peripheral surface and the light receiving surface of the light receiving element of the optical fiber is provided.
  • the light transmission layer forms a light guide path for guiding the light leaked by the light leakage generation unit to the light receiving element between the outer peripheral surface of the optical fiber and the light receiving surface of the light receiving element.
  • Light leaked from the light leakage generating part can be efficiently guided to the light receiving element through the light guide.
  • a light leakage generator is provided at the connection between the two optical fibers to leak a part of the light propagating in the core of one optical fiber to the clad of the other optical fiber. Compared to the case where the ends of the fiber are fused to minimize the connection loss, the light intensity of the leaked light is increased and the light intensity received by the light receiving element is increased.
  • a live line detection device for detecting whether or not an optical line formed by connecting one ends of two optical fibers is in a live line state, the two optical fibers A light leakage generator that leaks part of the light propagating through the core of one optical fiber to the cladding of the other optical fiber, and light leaked by the light leakage generator incident from the light receiving surface.
  • the light receiving element to be detected the light receiving element made of a material transparent to the light leaked from the light leakage generating portion, and the light transmission layer interposed between the other optical fiber, and the connection between the two optical fibers
  • a protective sleeve that protects the connection portion by being inserted, and the light transmission layer has a light guide path for guiding the light leaked by the light leakage generation portion to the light receiving element of the other optical fiber. It is formed between the outer peripheral surface and the light receiving surface of the light receiving element.
  • the child is, the coercive A hot-wire detection device is provided that is housed inside the protective sleeve.
  • the light transmission layer forms a light guide path for guiding the light leaked by the light leakage generation unit to the light receiving element between the outer peripheral surface of the optical fiber and the light receiving surface of the light receiving element.
  • Light leaked from the light leakage generating part can be efficiently guided to the light receiving element through the light guide.
  • a light leakage generator is provided at the connection between the two optical fibers to leak a part of the light propagating in the core of one optical fiber to the clad of the other optical fiber. Compared to the case where the ends of the fiber are fused to minimize the connection loss, the light intensity of the leaked light is increased and the light intensity received by the light receiving element is increased.
  • the connecting portion between the two optical fibers is protected by the protective sleeve, the strength of the connecting portion of the optical fiber can be increased.
  • the protective sleeve covers the optical fiber together with the light receiving element, the light leaked from the light leakage generating portion reaches the light receiving element without leaking to the outside.
  • a live line detection device for detecting whether or not an optical line formed by connecting one ends of two optical fibers is in a live line state, comprising two optical fibers A light leakage generator that leaks part of the light propagating in the core of one optical fiber to the cladding of the other optical fiber, and a light leaked by the light leakage generator incident from the light receiving surface.
  • a light guide path for guiding the light leaked from the generator to the light receiving element is formed between the outer peripheral surface of the other optical fiber and the light receiving surface of the light receiving element, and light leakage occurs on the outer peripheral surface of the other optical fiber. Light leakage occurs at the light leakage generation part between the light transmission layer and the light transmission layer.
  • a live line detection device is provided that is formed by attaching a transparent adhesive to the light and is provided with a lens structure that refracts the light toward the light transmission layer.
  • the light transmission layer forms a light guide path for guiding the light leaked by the light leakage generation unit to the light receiving element between the outer peripheral surface of the optical fiber and the light receiving surface of the light receiving element.
  • Light leaked from the light leakage generating part can be efficiently guided to the light receiving element through the light guide.
  • a light leakage generator is provided at the connection between the two optical fibers to leak a part of the light propagating in the core of one optical fiber to the clad of the other optical fiber. Compared to the case where the ends of the fiber are fused to minimize the connection loss, the light intensity of the leaked light is increased and the light intensity received by the light receiving element is increased.
  • the light transmission layer may extend from the optical fiber, the outer peripheral surface, and the light receiving surface of the light receiving element along the outer peripheral surface of the optical fiber ',' toward the light leakage generating unit.
  • the light guide path for guiding the light leaked by the light leakage generation unit to the light receiving element is widened, the light leaked by the light leakage generation unit can be more efficiently guided to the light receiving element.
  • the light transmission layer forms a light guide path for guiding the light leaked from the light leakage generation portion to the light receiving element, between the outer peripheral surface of the optical fiber and the light receiving surface of the light receiving element.
  • the light leaked at the head can be efficiently guided to the light receiving element through the light guide, and as a result, even when the light intensity of the light propagating through the optical fiber is low, the live line state can be detected stably.
  • FIG. 1 is a schematic plan view showing the configuration of Embodiment 1 of the present invention.
  • FIG. 2 is a schematic plan view showing another configuration example same as above.
  • FIG. 3 is a schematic plan view showing still another configuration example of the above.
  • FIG. 4 is a schematic plan view showing still another configuration example of the above.
  • FIG. 5 is a schematic plan view showing still another configuration example of the above.
  • FIG. 6 is a schematic plan view showing still another configuration example of the above.
  • FIG. 7 is a schematic plan view showing still another configuration example of the above.
  • FIG. 8 is a schematic plan view showing the configuration of Embodiment 2 of the present invention.
  • FIG. 9 is a schematic plan view showing another configuration example same as above.
  • FIG. 10 shows a schematic configuration of Embodiment 3 of the present invention, in which (a) is a plan view, (b) is a side view, and (c) is a sectional view taken along line XC-XC of (a).
  • FIG. 11 is a schematic plan view showing another configuration example same as above.
  • FIG. 12 is a schematic plan view showing the configuration of Embodiment 4 of the present invention.
  • FIG. 13 is a schematic plan view showing another configuration example same as above.
  • FIG. 14 is a schematic plan view showing still another configuration example of the above.
  • FIG. 15 is a schematic plan view showing the configuration of the fifth embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments for Applying the Invention hereinafter, with reference to the accompanying drawings, embodiments of the present invention form part of this specification. This will be described in more detail. Throughout the drawings, the same or similar parts are denoted by the same reference numerals, and redundant description thereof is omitted.
  • the hot-line detection device of the present embodiment has an optical line A that is formed by connecting one end of two optical fibers F 1 and F 2 so as to face each other. Whether or not.
  • This hot-wire detection device is provided at the connection portion between the one ends of the two optical fibers F 1 and F 2, and a part of the light propagating in the core 11 of one optical fiber F 1 is transferred to the other light.
  • a light leakage generating unit 1 for leaking light into the cladding 12 of the fiber F 2 and a light receiving element 2 for detecting light leaked by the light leakage generating unit 1 incident from the light receiving surface 2a are provided.
  • the light receiving element 2 has a transparent adhesive layer (light transmissive layer) 3 made of an adhesive that is transparent to the light leaked from the light leak generation unit 1, and is attached to the outer peripheral surface of the other optical fiber F 2. It is glued.
  • the light leakage generation unit 1 is configured so that both optical fibers F 1 and F 2 are connected to each other within the cross section perpendicular to the optical axis direction of both optical fibers F 1 and F 2.
  • the optical axis center of F 1 and F 2 (the central axis of the core 11) is shifted from each other and the ends are fused together.
  • the light leakage generating section 1 having this configuration causes light leakage due to mismatching of the connection portions of the two optical fibers F 1 and F 2, and leaks some light to the cladding 12 of the optical fiber F 2. Therefore, it is possible to manage the amount of leaked light by adjusting the amount of deviation between the two optical fibers F 1 and F 2.
  • the arrows in Fig. 1 indicate the light propagation direction.
  • a photodiode chip is used as the light receiving element 2, and the output current of the light receiving element 2 is converted into a voltage signal by a current-voltage conversion circuit (not shown) using an operational amplifier.
  • determination means comprising a circuit using a microcomputer or a comparator is provided. Based on the voltage signal output from the current-to-voltage conversion circuit. The determination means determines whether or not the optical line A is in a live line state.
  • the determination means determines that the light receiving element 2 is in a live line state (the light is normally transmitted) if the received light intensity of the light receiving element 2 is equal to or higher than a preset reference value, and if it is less than the reference value, Judge as not in line condition (light is not transmitted normally).
  • the determination result of the determination means is notified by, for example, displaying it on a display or displaying it on a display means such as a light emitting diode.
  • Each of the optical fibers F 1 and F 2 has a coating removed from the one end side over a predetermined length to expose the outer peripheral surface of the strand (that is, the outer peripheral surface of the clad 12).
  • the light receiving element 2 is bonded to the outer peripheral surface of the cladding 12 of the optical fiber F 2 through the transparent adhesive layer 3 so that the light receiving surface 2 a is on the cladding 12 side of the optical fiber F 2.
  • the light receiving element 2 has a specified length (for example, 2 to 5 mm) from the light leakage generating part (that is, the connecting part of both optical fibers F 1 and F 2) 1 in the optical axis direction of the other optical fiber F 2. Degree) are placed apart.
  • each optical fiber F 1, F 2 quartz glass fiber is used among the various optical fibers F 1 and F 2, which is excellent in environmental resistance such as propagation loss, transmission bandwidth and mechanical strength.
  • silica glass fiber used as the optical fibers F 1 and F 2 of the present embodiment a single mode type (SM type) fiber is adopted, but it is not limited to a single mode type, but a step index type (SI Type) Multimode fiber and graded index type (G1 type) multimode fiber may be used.
  • the optical fibers F 1 and F 2 are not limited to quartz glass fibers, but may be multicomponent glass fibers or plastic fibers.
  • the transparent adhesive layer 3 is transparent to light having these wavelengths. It may be formed of an epoxy resin or acrylic resin which is a suitable adhesive.
  • the transparent adhesive layer 3 is not necessarily formed of a material having a refractive index higher than that of the cladding 12, and may be formed of a material having an intermediate refractive index between air and the cladding 12.
  • the light receiving element 2 is in the case where the wavelength of light propagating through the optical fibers F 1 and F 2 (that is, light for optical communication) is in the 1 / m band wavelength region (eg, 13 1 O nm).
  • a light-sensitive I n G A As photodiode chip is used in the 1 m-band wavelength region, and when the light wavelength is in the 0.8 m-band wavelength region (for example, 85 nm), the corresponding 0.8 m S Photodiode with high photosensitivity in the band wavelength region A diode chip may be used.
  • a light receiving element 2 having high light receiving sensitivity in each wavelength region may be provided separately. Good.
  • the transparent adhesive layer 3 has a light guide path for guiding the light leaked by the light leak generating unit 1 to the light receiving element 2 and the outer periphery of the other optical fiber F 2. It is formed between the surface and the light receiving surface 2 a of the light receiving element 2. That is, as described above, the transparent adhesive layer 3 is made of an adhesive that is transparent to the light leaked from the light leakage generation unit 1, and not only bonds the light receiving element 2 to the optical fiber F2, but also the light leakage generation unit 1. It also has a function as a light guide for guiding the leaked light to the light receiving element 2.
  • the transparent adhesive layer 3 is attached to the entire surface of the light receiving surface 2a of the light receiving element 2, and the light receiving element 2 receives light passing through the light guide path from the entire surface of the light receiving surface 2a.
  • the difference in refractive index between the clad 12 and the transparent adhesive layer 3 is smaller than the refractive index difference between the clad 12 and air.
  • the ratio of the light totally reflected at the interface with 3 is small and passes through the interface between the clad 12 and the transparent adhesive layer 3 and reaches the light receiving surface 2 a of the light receiving element 2.
  • a part of the light leaked by the light leak generation unit 1 is received from the outer peripheral surface of the cladding 12 of the optical fiber F 2 through the light guide path made of the transparent adhesive layer 3 and the light receiving surface of the light receiving element 2.
  • the light reaches the light receiving element 2 more efficiently than in the case of passing through the air.
  • the light leaked from the light leakage generating part 1 is transferred to the light receiving element 2 by the transparent adhesive layer 3.
  • the light can be guided with high efficiency, and stable light leakage can be secured to the light receiving element 2.
  • the light leakage generator 1 when the light leakage generator 1 is provided at the connection between the two optical fibers F 1 and F 2, the ends of the optical fibers F 1 and F 2 are fused to minimize the connection loss. Compared with, the light intensity of the leaked light generated at the connection between the optical fibers F 1 and F 2 is increased. As a result, since a part of the light propagating through the optical fibers F 1 and F 2 can be transmitted to the light receiving element 2 with high efficiency, the light intensity of the light propagating through the optical fibers F 1 and F 2 is relatively low. Even if it is small, there is an advantage that the active state can be detected stably.
  • the transparent adhesive layer 3 has a light receiving surface 2 of the light receiving element 2 so that a light guide path is also formed on a straight line connecting the light leakage generating portion 1 and the light receiving surface 2 a of the light receiving element 2.
  • the light leakage generation part 1 side may be extended from between a and the outer peripheral surface of the clad 12 of the optical fiber F 2.
  • the adhesive constituting the transparent adhesive layer 3 is received not only between the light receiving surface 2 a of the light receiving element 2 and the outer peripheral surface of the optical fiber F 2, which is opposed to the light receiving surface 2 a, but also the optical fiber F 2.
  • the transparent adhesive layer 3 Widen the range of formation.
  • the light guide path for guiding the leaked light generated in the light leakage generating section 1 to the light receiving element 2 is wide, and light that would otherwise leak into the air can also be guided to the light receiving element 2.
  • the light receiving efficiency of the light receiving element 2 for the leaked light generated by the generator 1 is further increased.
  • the light receiving element 2 may be arranged so as to be inclined with respect to the outer peripheral surface of the optical fiber F 2 so that the light receiving surface 2 a faces the light leakage generating unit 1 side.
  • the transparent adhesive layer 3 in the optical axis direction of the optical fiber F 2 is obtained by depositing the adhesive constituting the transparent adhesive layer 3 on a part of the outer peripheral surface of the cladding 12 of the optical fiber F 2.
  • the light receiving element 2 is inclined by inclining the both side surfaces 3 a of the, and disposing the light receiving element 2 on the inclined one side surface 3 a.
  • the light receiving element 2 tilts the light receiving surface 2 a toward the light leakage generating unit 1, so that the incident angle of the leaked light generated by the light leakage generating unit 1 with respect to the light receiving surface 2 a is reduced substantially.
  • a large light receiving area it becomes possible to receive light leaked from the light leakage generating section 1 with higher efficiency.
  • the leakage light generated in the light leakage generating part 1 is transferred to the transparent adhesive layer 3.
  • a lens structure 4 that is refracted toward may be formed.
  • a transparent adhesive is attached to the outer peripheral surface of the optical fiber F 2 clad 1 2 with respect to the leakage light generated in the leakage light generating section 1, and the surface of the adhesive is substantially spherical due to surface tension. It is formed by solidifying as.
  • a part of the light leaked by the light leakage generating part 1 enters the lens structure 4 made of an adhesive, is distributed toward the transparent adhesive layer 3 and reaches the light receiving element 2.
  • the configuration of the light leakage generating unit 1 is that the optical axis is shifted between the optical fibers F 1 and F 2 as described above.
  • the configurations shown in FIGS. 5 and 6 can be adopted.
  • a re-leakage light generation part 1 is formed by interposing a gap between both optical fibers F 1 and F 2, and a mismatched part is formed between both optical fibers F 1 and F 2.
  • a mismatched part is formed between both optical fibers F 1 and F 2.
  • the light leakage generating part 1 is configured by making the end faces of the two optical fibers F 1 and F 2 abutting each other into a mismatched shape.
  • the end faces to which both optical fibers F 1 and F 2 are connected are polished into different shapes (here, the end face of one optical fiber F 1 is polished obliquely and the end face of the other optical fiber F 2 is polished.
  • the core 1 1 is polished so that the core 1 1 protrudes), and a mismatched portion is formed between the two optical fibers F 1 and F 2 to cause light leakage, and a part of the light is transmitted to the optical fiber F 2. The light is leaked to the clad 1 2.
  • the bending is repeated a plurality of times with a relatively small radius of curvature with respect to the optical fiber F 2 between the light leakage generation part 1 and the light receiving element 2. It may be possible to generate a microbend loss by forming the microphone mouth bend part 5. As a result, the total reflection conditions at the interface between the core 1 1 and the clad 1 2 are broken, and light can easily leak from the portion where the transparent adhesive layer 3 on the outer peripheral surface of the optical fiber F 2 is provided. The amount of received light can be increased. In this case, the leakage light generation unit 1 does not necessarily have to generate leakage light due to mismatch as described above. Even if the two fibers F 1 and F 2 are simply fused, the leakage light is emitted by the microbending unit 5. Can be generated.
  • the live line detection device of the present embodiment has two optical fibers F 1 and F 2 that are connected at an angle so that the optical axes intersect each other. 1 is different from the live line detection apparatus of the first embodiment.
  • both optical fibers F 1 and F 2 are not aligned with each other, so that both optical fibers F 1, F 2 A mismatched portion is formed between them to cause light leakage, and part of the light leaks to the cladding 12 of the optical fiber F2.
  • the end faces of both optical fibers F 1 and F 2 are joined by fusion or adhesion.
  • At least one of the optical fibers F 1 and F 2 (in the example of FIG. Fiber F 2 only)
  • the end faces may be cut obliquely to increase the degree of adhesion between the end faces of the optical fibers F 1 and F 2.
  • the angle at which the end face of the optical fiber F 2 is cut should be, for example, about 8 degrees with respect to the vertical plane of the optical axis so as to reduce the loss due to reflection at the end face of the optical fiber F 2 (return loss). Is desirable.
  • the hot-wire detection device of the present embodiment covers the connection portion (light leakage generation portion 1) of the optical fibers F 1 and F 2 with a reinforcing sleeve 6 to increase the strength of the connection portion.
  • this is different from the live line detection apparatus of the first embodiment.
  • the reinforcing sleeve 6 covers the optical fibers F 1 and F 2 by inserting the optical fibers F 1 and F 2 to a predetermined length on both sides of the connecting portion and inserting the reinforcing support plate 7 together with the optical fibers F 1 and F 2.
  • the light receiving element 2 is embedded in the support plate 7 at a position facing the outer peripheral surface of the optical fiber F 2 cladding 1 2 so as to expose the light receiving surface 2 a and is integrated with the support plate 7, and is transparent. Bonded to the outer peripheral surface of the cladding 12 of the optical fiber F 2 with the adhesive layer 3. Note that the lead wire 2 b for electrical connection with the light receiving element 2 is drawn out of the protective sleeve 6 through the support plate 7.
  • a positioning mark M 1 is provided at substantially the center in the longitudinal direction of the support plate 7 facing the optical fibers F 1 and F 2, and the positioning mark M 1 And the light receiving element 2 are set in advance.
  • the positioning mark M 1 is aligned with the connection portion (light leakage generating portion 1) of the optical fibers F 1 and F 2
  • the light receiving element 2 can be disposed at an optimal distance from the light leakage generating portion 1. it can. Therefore, there is no variation in the distance from the light leakage generating portion 1 of the light receiving element 2 for each active line detection device, and the variation in the light receiving efficiency in the light receiving element 2 can be suppressed.
  • a light reflecting film that reflects light leaked from the optical fibers F 1 and F 2 is formed on the inner peripheral surface of the protective sleeve 6 and the surface of the support plate 7 facing the optical fibers F 1 and F 2, Light can be prevented from leaking wastefully from the outer peripheral surfaces of the fibers F 1 and F 2 and the light leakage generating section 1, and the light receiving efficiency of the light receiving element 2 is improved.
  • light leakage occurs at the light leakage generation unit 1 between the outer peripheral surface of the cladding 12 of the optical fiber F 2 and the light receiving surface 2 a of the light receiving element 2.
  • Pre-transparent to light It is also possible to intervene ism 8.
  • a prism 8 having a substantially triangular prism shape is used, and one side surface of the prism 8 is bonded to the outer peripheral surface of the optical fiber F 2 by the transparent adhesive layer 3, and the other side surface of the prism 8 is fixed.
  • the transparent adhesive layer 3 is adhered to the light receiving surface 2 a of the light receiving element 2.
  • the light receiving element 2 is disposed so as to be inclined with respect to the outer peripheral surface of the optical fiber F 2 so that the light receiving surface 2 a faces the light leakage generating unit 1 side.
  • the inclination angle of the light receiving surface 2 a of the light receiving element 2 can be set by the shape of the prism 8 (the angle between the one side surface and the other side surface). The light receiving efficiency can be accurately determined.
  • the support plate 7 is provided with an opening 7 a for avoiding interference with the prism 8, and the protective sleeve 6 is provided with a hole at a position corresponding to the opening 7 a.
  • the live line detection apparatus of this embodiment is different from the live line detection apparatus of Embodiment 1 in that a means for diffusing the leaked light generated in the leak light generation unit 1 is provided.
  • the optical fiber F 2 coating 1 3 is removed while leaving a part near the light leakage generating portion 1, and the light receiving element 2 is bonded to the coating 1 3 by the transparent adhesive layer 3. It is possible to do.
  • the coating 13 a coating that is transparent to the light leaked by the light leakage generating unit 1 and is provided with light diffusibility by coloring is adopted.
  • the optical fiber F 2 light leaked from the outer peripheral surface of the cladding 1 2 to the coating 1 3 diffuses in the coating 1 3 and spreads through the transparent adhesive layer 3 in a spread state. will reach a.
  • a diffusion member 14 such as a sheet having light diffusion transparency may be interposed between the end faces of both optical fibers F 1 and F 2.
  • the diffusion member 14 may be an adhesive.
  • the light from the optical fiber F 1 is diffused when passing through the diffusion member 14, and reaches the light receiving surface 2 a of the light receiving element 2 through the transparent adhesive layer 3 in a spread state.
  • the outer peripheral surface of the cladding 1 2 between the light leakage generation part 1 and the light receiving element 2 in the optical fiber F 2 is subjected to irregularities and V groove processing by embossing or etching.
  • a diffusion processing part 15 In this case, the light leaked to the cladding 12 of the optical fiber F 2 is diffused by the diffusion processing portion 15 and reaches the light receiving surface 2 a of the light receiving element 2 through the transparent adhesive layer 3 in the spread state.
  • the leakage light generated in the leakage light generation unit 1 is diffused.
  • the leakage light generated in the leakage light generation unit 1 is diffused.
  • the light receiving efficiency of the light receiving element 2 is higher than that of the light receiving element 2. Variation due to distance from generator 1 is less likely to occur. Further, in the light receiving efficiency, variations due to the deviation between the position of the light receiving element 2 and the optical axis of the optical fiber F 2 are less likely to occur.
  • the hot-wire detection device of this embodiment is a recoating layer that protects the connection portion by covering the connection portion (light leakage generation portion 1) between the optical fibers F 1 and F 2. 9 is different from the live line detection apparatus of the first embodiment.
  • the recoating layer 9 extends over the entire area where the coating 13 is removed from the periphery of the connection portion of the optical fibers F 1 and F 2 after the optical fibers F 1 and F 2 are joined (fused). It is formed by coating, and is configured so that both ends slightly cover the coatings 13 of the optical fibers F 1 and F 2, respectively. By providing the recoating layer 9 in this way, the strength of the connecting portion of the optical fibers F 1 and F 2 can be increased.
  • a material transparent to the light leaked from the light leakage generating part 1 is used for the recoating layer 9, and the light receiving element 2 is adhered to the recoating layer 9 from above with the transparent adhesive layer 3. . Therefore, light leaked from the outer peripheral surface of the cladding 12 to the recoating layer 9 in the optical fiber F 2 must reach the light receiving surface 2a of the light receiving element 2 through the recoating layer 9 and the transparent adhesive layer 3. become.
  • the recoat layer 9 is formed of a light diffusive and transmissive material, the leakage light generated in the light leakage generating section 1 can be diffused in the recoat layer 9 as described in the fourth embodiment, and as a result Even if the distance from the light leakage generating part 1 of the light receiving element 2 varies for each hot-wire detection device, the variation in the light receiving efficiency of the light receiving element 2 can be suppressed.
  • the transparent adhesive layer 3 made of a transparent adhesive is illustrated as a light transmitting layer that forms a light guide path between the outer peripheral surface of the optical fiber F 2 and the light receiving surface 2 a of the light receiving element 2.
  • the light transmission layer that forms the light guide path may be any layer that is interposed between the light receiving element 2 and the optical fiber F 2 made of a transparent material with respect to the light leaked from the light leak generation unit 1, for example, matching. It may be a liquid transparent layer such as oil.
  • the means for fixing the light receiving element 2 to the optical fiber F 2 is required separately from the light transmitting layer, in the case of the transparent adhesive layer 3 In the same manner as described above, stable light leakage can be secured for the light receiving element 2.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

La présente invention concerne un dispositif de détection de ligne active destiné à détecter si une trajectoire optique formée par connexion des extrémités de deux fibres optiques se trouve ou non à l'état actif, ledit dispositif de détection de ligne active se caractérisant en ce qu'il comprend : une partie de fuite de lumière qui sert à établir la connexion entre les deux fibres optiques et provoque la fuite d'une certaine partie de la lumière qui se propage dans l'âme de l'une des fibres optiques, jusque dans la gaine de l'autre fibre optique; un élément de réception de lumière qui détecte la lumière fuyant par la partie de fuite de lumière et pénètre dans une surface de réception de lumière; et une couche de transmission de lumière qui est réalisée dans une matière qui transmet la lumière fuyant par la partie de fuite de lumière et est interposée entre l'élément de réception de lumière et l'autre fibre optique. A cet emplacement, la couche de transmission de lumière forme une trajectoire de guidage de lumière destinée à guider la lumière fuyant par la partie de fuite de lumière jusqu'à l'élément de réception de lumière via un espace entre la surface périphérique extérieure de l'autre fibre optique et la surface de réception de lumière de l'élément de réception de lumière, et l'élément de réception de lumière est disposé en formant un angle par rapport à la surface périphérique extérieure de l'autre fibre optique de sorte que la surface de réception de lumière fait face à la partie de fuite de lumière.
PCT/IB2010/003366 2010-01-15 2010-12-30 Dispositif de détection de ligne active WO2011086415A2 (fr)

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JP2010-007208 2010-01-15
JP2010007208A JP2011145216A (ja) 2010-01-15 2010-01-15 活線検出装置

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WO2011086415A2 true WO2011086415A2 (fr) 2011-07-21
WO2011086415A3 WO2011086415A3 (fr) 2011-09-29

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JP2015505969A (ja) * 2011-12-19 2015-02-26 オプトスカンド エービー 高出力光ファイバーケーブルを用いるレーザーシステムの処理性能をモニターするための装置

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JP5684776B2 (ja) * 2012-12-14 2015-03-18 株式会社フジクラ 光パワーモニタ装置、製造方法、及び光パワーモニタ方法
CN103513349A (zh) * 2013-09-24 2014-01-15 广西安捷讯电子科技有限公司 光功率监视器
WO2015136924A1 (fr) * 2014-03-12 2015-09-17 パナソニックＩｐマネジメント株式会社 Dispositif à fibre optique
JP2015219493A (ja) * 2014-05-21 2015-12-07 日立金属株式会社 通信光検知用光モジュール及び通信光検知構造

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JP2011145216A (ja) 2011-07-28
WO2011086415A3 (fr) 2011-09-29

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