WO2011010607A1 - 3波長光合波器 - Google Patents
3波長光合波器 Download PDFInfo
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- WO2011010607A1 WO2011010607A1 PCT/JP2010/062038 JP2010062038W WO2011010607A1 WO 2011010607 A1 WO2011010607 A1 WO 2011010607A1 JP 2010062038 W JP2010062038 W JP 2010062038W WO 2011010607 A1 WO2011010607 A1 WO 2011010607A1
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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
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
- G02B6/0008—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted at the end of the fibre
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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
- G02B6/26—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
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
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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
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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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
- G02B6/26—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
- G02B6/2808—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 a mixing element which evenly distributes an input signal over a number of outputs
- G02B6/2813—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 a mixing element which evenly distributes an input signal over a number of outputs based on multimode interference effect, i.e. self-imaging
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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
- G02B6/26—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
- G02B6/2821—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 lateral coupling between contiguous fibres to split or combine optical signals
- G02B6/2835—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 lateral coupling between contiguous fibres to split or combine optical signals formed or shaped by thermal treatment, e.g. couplers
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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
- G02B6/26—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
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29371—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion
- G02B6/29374—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion in an optical light guide
- G02B6/29376—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating principle based on material dispersion in an optical light guide coupling light guides for controlling wavelength dispersion, e.g. by concatenation of two light guides having different dispersion properties
Definitions
- the present invention relates to a three-wavelength optical multiplexer that multiplexes light of three wavelengths incident on three light guides for single mode transmission into one light guide for single mode transmission.
- optical fibers which are light guides, are arranged on the same plane and fused and stretched to split, demultiplex, and multiplex incident light, an optical splitter, an optical splitter, and an optical coupler.
- a waver is known.
- Patent Document 1 discloses an optical fiber coupler in which two optical fibers having substantially equal propagation constants and one dummy optical fiber are aligned and fused and stretched. Thereby, an equally branched optical fiber coupler having a broadband wavelength characteristic is realized.
- Patent Document 2 discloses an optical fiber coupler in which three optical fibers including optical fibers having different normalized frequencies and / or different fiber diameters are aligned and fused. As a result, when two optical signals of 1.3 ⁇ m and 1.55 ⁇ m are incident on one port on the input side, the optical signals of 1.3 ⁇ m and 1.55 ⁇ m are demultiplexed on the output side, and further 1.3 ⁇ m An optical fiber coupler in which the optical signal is equally branched is realized.
- Patent Document 3 discloses an optical fiber type optical multiplexer in which three optical fibers including an optical fiber having a core diameter larger than that of other optical fibers are arranged and fused and stretched. Thereby, an optical fiber type optical multiplexer that combines optical signals of the same wavelength with low loss is realized.
- optical fiber coupler is used for optical communication and the wavelength band of an optical signal to be transmitted is 1 ⁇ m or more. Therefore, for example, it is not suitable for the purpose of combining visible lights such as red, green, and blue used in video displays.
- the optical fiber coupler disclosed in Patent Document 1 is intended to broaden the bandwidth of the emitted optical signal
- the optical fiber coupler disclosed in Patent Document 2 is used for the incident optical signal of two wavelengths.
- the optical fiber type optical multiplexer disclosed in Patent Document 3 is designed to reduce the loss of optical signals that are combined by entering optical signals having the same wavelength. . Therefore, it is not suitable for the purpose of multiplexing light of three colors having different wavelengths with a transmittance higher than a certain standard.
- a multi-stage optical fiber optical multiplexer in which two optical fiber optical multiplexers are connected in series, or an optical signal 2.
- a bulk type optical multiplexer in which parts for spatially coupling are assembled is known.
- the multi-stage optical fiber type optical multiplexer needs to be routed and stored in a package after connecting the fibers of the two optical fiber type optical multiplexers, the size becomes large. The device itself that uses is forced to grow.
- the bulk type optical multiplexer needs to make the optical axis alignment between the components precise, and the optical axis is shifted when vibrations occur, resulting in poor reliability.
- the present invention is a three-wavelength optical combination that combines light with different wavelengths, particularly red, green, and blue light that is incident on the three light guides with a transmittance exceeding a certain standard.
- the purpose is to provide a waver.
- the present invention comprises three light guides comprising a first light guide for single mode transmission, a second light guide for single mode transmission, and a third light guide for single mode transmission.
- Optical multiplexers arranged in parallel with each other in this order as seen from the cross-sectional direction orthogonal to the fiber axis direction, wherein the first light guide and the third light guide are not in contact with each other, respectively.
- the first light guide and the second light guide Arranged in contact with only the second light guide, of the three light guides, the first light guide and the second light guide have the same parameters,
- the third light guide has parameters different from those of the other two light guides, and the relationship between the wavelengths of light incident from the three light guides is ⁇ 1 ⁇ 2.
- the incident three-wavelength light can be multiplexed with a transmittance higher than a certain standard. Furthermore, since the three light guides have an integral configuration, the size is small.
- the first light guide, the second light guide, and the third light guide are arranged in parallel on the same plane in this order. May be.
- the first light guide, the second light guide, and the third light guide are arranged in parallel on the same plane, it is easy to package and has a stable quality. Can be realized.
- the first light guide, the second light guide, and the third light guide are single mode optical fibers, and the three light guides.
- the light body may be fused and stretched in a lump.
- the first light guide, the second light guide, and the third light guide are single mode optical fibers, and the three light guides are fused and stretched together. Therefore, it is possible to easily produce an optical coupling portion with stable quality.
- one of the parameters is a secondary mode cutoff wavelength, and the secondary mode cutoff wavelength of the first single mode optical fiber and the second single mode optical fiber.
- the relationship between C1, the secondary mode cutoff wavelength C2 of the third single mode optical fiber, and the wavelength ⁇ 3 of the light incident from the third single mode optical fiber is C1 ⁇ C2 ⁇ 3. It may be.
- exit port of the second light guide and the third light guide in the present invention may be subjected to non-reflection treatment.
- a substantially unnecessary light guide can be arranged, and a 3-wavelength optical multiplexer with 3 inputs and 1 output can be obtained.
- the light having the wavelength of ⁇ 1 may be blue, the light having the wavelength of ⁇ 2 may be green, and the light having the wavelength of ⁇ 3 may be red.
- the three-wavelength optical multiplexer in the present invention it is possible to multiplex incident three-wavelength light with a transmittance equal to or higher than a certain standard. Moreover, since the three light guides have an integral configuration, the size is small.
- FIG. It is a figure which shows the graph of the wavelength with respect to the transmittance
- FIG. It is a figure which shows the graph of the wavelength with respect to the transmittance
- FIG. 1 is a diagram showing a three-wavelength optical multiplexer 100 according to an embodiment of the present invention. As shown in FIG. 1, the three-wavelength optical multiplexer 100 according to this embodiment includes three single mode optical fibers 1, 2, and 3.
- the three single mode optical fibers 1, 2, 3 are arranged in parallel with each other, and the three single mode optical fibers 1, 2, 3 are fused and stretched together at the optical coupling portion 6.
- the single mode optical fibers 1, 2, and 3 may be arranged in parallel to each other when viewed from the cross-sectional direction orthogonal to the fiber axis direction in the optical coupling unit 6. That is, the single mode optical fibers 1, 2, and 3 may be arranged on the same plane in the optical coupling unit 6, or arranged on the same curved surface that is spirally twisted. Also good. Further, the single mode optical fiber 1 and the single mode optical fiber 3 are arranged in contact with only the single mode optical fiber 2 without contacting each other.
- the single mode optical fibers 1, 2, and 3 have ports through which light enters and exits.
- the single mode optical fiber 1 has an incident port 1-1 through which light is incident and an output port 1-2 through which light is emitted.
- the single mode optical fiber 2 has an entrance port 2-1 and an exit port 2-2
- the single mode optical fiber 3 has an entrance port 3-1 and an exit port 3-2.
- the exit port 2-2 and the exit port 3-2 are subjected to non-reflection processing by the end portion 10.
- Light of different wavelengths is incident from the incident ports 1-1, 2-1, and 3-1 of the single mode optical fibers 1, 2, and 3, respectively. Specifically, red light is incident from the incident port 3-1 of the single mode optical fiber 3 located on the lower side in FIG. Green light is incident from the incident port 2-1 of the single mode optical fiber 2 located at the center in FIG. Further, blue light is incident from the incident port 1-1 of the single mode optical fiber 1 located on the upper side in FIG. The incident visible light of the three colors is combined at the optical coupling unit 6 and the combined light is output from the output port 1-2. Note that the exit ports 2-2 and 3-2 are subjected to antireflection processing by the terminal portion 10, thereby preventing reflection of the optical signal to the entrance port.
- the red light is light having a wavelength in the range of 600 nm to 700 nm.
- Green light is light having a wavelength in the range of 490 nm to 600 nm.
- blue light is light having a wavelength in the range of 400 nm to 500 nm.
- the above wavelength band is used in this embodiment, although the values of the above wavelength bands differ depending on the purpose and the like, for example, the wavelength bands of green light and blue light overlap.
- FIG. 2 is a cross-sectional view taken along line AA ′ relating to the optical coupling portion 6 of the three-wavelength optical multiplexer 100 shown in FIG.
- the single mode optical fibers 1, 2, and 3 constituting the three-wavelength optical multiplexer 100 include a core 9 and a clad 12 formed around the core 9.
- FIG. 3 is a diagram illustrating an arrangement example of the single mode optical fibers 1, 2, and 3 in the three-wavelength optical multiplexer 100.
- the single mode optical fiber 1 and the single mode optical fiber 3 are arranged in contact with each other only with the single mode optical fiber 2 without contacting each other. Good.
- the three single-mode optical fibers 1, 2, and 3 are each in contact with both of the other two single-mode optical fibers as if they were stacked. Do not arrange. (Characteristics of single mode optical fiber)
- the single mode optical fibers 1, 2, and 3 having the above-described configuration have characteristics as shown in the table of FIG.
- the single mode optical fibers 1 and 2 have the same parameters, and the single mode optical fiber 3 has parameters different from the other two.
- the parameters are those of the single mode optical fibers 1, 2, and 3. Specifically, the clad diameter, the refractive index of the core, the refractive index of the clad, the relative refractive index of the core and the clad, the aperture Number (NA), secondary mode cutoff wavelength, etc.
- single mode optical fibers having the same parameters are used for the single mode optical fibers 1 and 2, and different single mode optical fibers are used for the single mode optical fiber 3.
- the single mode optical fiber 1 in FIG. 4 is used for the single mode optical fibers 1 and 2
- the single mode optical fiber B in FIG. 4 is used for the single mode optical fiber 3.
- the characteristics that are greatly different between the single mode optical fiber A and the single mode optical fiber B are the characteristics related to the wavelength.
- the single mode optical fiber A has an operating wavelength of 445 to 600 nm and a secondary mode cutoff wavelength of 430 ⁇ 15 nm.
- the single-mode optical fiber B has an operating wavelength of 600 to 770 nm, a secondary mode cut-off wavelength of 570 ⁇ 30 nm, and has a higher wavelength band than the single-mode optical fiber A.
- FIG. 5 is a graph showing a winding diameter versus bending loss graph when red light of 656 nm is incident on the single-mode optical fiber A and the single-mode optical fiber B constituting the three-wavelength optical multiplexer 100.
- the single mode optical fiber A has a diameter of about 20 mm.
- a bending loss of about 1 dB occurs, and a bending loss of 9 dB occurs with a diameter of 12 mm.
- the single mode optical fiber B bending loss does not occur even with a diameter of 12 mm. Therefore, in the optical multiplexer, when the single mode optical fiber B is used as the single mode optical fiber that receives the red light, the handling can be reduced, so that the single mode optical fiber can be accommodated in a smaller space. (Manufacture of 3-wavelength optical multiplexer)
- the fusion stretching method used when forming the optical coupling portion 6 of the three-wavelength optical multiplexer 100 will be described with reference to FIG. First, three single mode optical fibers 1, 2, and 3 having an optical coupling portion are prepared. Next, the protective material which coat
- the stretching method will be described.
- Three single mode optical fibers 1, 2, and 3 are brought into contact with each other as described above. Then, red light is incident from the incident port 3-1 of the single mode optical fiber 3 and is stretched while monitoring the emission power of the light emitted from the emission port 1-2 of the single mode optical fiber 1. Then, when the output power of the light output from the output port 1-2 reaches a desired value, the optical coupling unit 6 of the three-wavelength optical multiplexer 100 can be obtained by stopping the stretching.
- the speed at the time of fusion drawing is 275 ⁇ m / second, and the drawing time is about 85 seconds. That is, the extending length of the optical coupling portion 6 is about 23.375 mm.
- the wavelength of visible light incident from the incident ports 1-1, 2-1, 3-1 and the value of the output power when stopping the stretching are appropriately set according to the target transmittance and the wavelength at that time. can do.
- FIG. 7 is a diagram showing a configuration table of a three-wavelength optical multiplexer in Comparative Examples 1 and 2 and the example.
- the comparative example 1 uses optical fibers having the same parameters for the three single mode optical fibers 1, 2, and 3 constituting the three-wavelength optical multiplexer 100.
- the single mode optical fiber A shown in FIG. 4 is used for the three single mode optical fibers 1, 2, and 3.
- blue light is incident on the single mode optical fiber 1
- green light is incident on the single mode optical fiber 2
- red light is incident on the single mode optical fiber 3. Is incident.
- Comparative Example 2 uses optical fibers having different parameters for the three single-mode optical fibers 1, 2, and 3 constituting the three-wavelength optical multiplexer 100. Specifically, the single mode optical fiber 1 shown in FIG. 4 is used for the single mode optical fibers 1 and 3 of the comparative example 2, and the single mode optical fiber 2 shown in FIG. B is used.
- the three-wavelength optical multiplexer 100 in the comparative example 2 is partially different from the light incident on the three-wavelength optical multiplexer 100 in the comparative example 1 and the example. That is, blue light is incident on the single mode optical fiber 1, red light is incident on the single mode optical fiber 2, and green light is incident on the single mode optical fiber 3.
- the embodiment uses the single mode optical fiber A shown in FIG. 4 for the single mode optical fibers 1 and 2, and uses the single mode optical fiber B shown in FIG. 4 for the single mode optical fiber 3.
- blue light is incident on the single mode optical fiber 1
- green light is incident on the single mode optical fiber 2
- red light is incident on the single mode optical fiber 3. Incident.
- the wavelength of the blue light incident on each of the three-wavelength optical multiplexers 100 is 446 nm, which is defined as ⁇ 1.
- the wavelength of green light is 532 nm, which is defined as ⁇ 2.
- the wavelength band of red light is 635 nm, which is defined as ⁇ 3.
- the secondary mode cutoff wavelength of the single mode optical fiber A is 434 nm, which is defined as C1.
- the secondary mode cutoff wavelength of the single mode optical fiber B is 574 nm, which is defined as C2.
- the three-wavelength optical multiplexer 100 in the embodiment includes the single mode optical fibers 1 and 2 having parameters that are equal to each other and the single mode optical fiber 3 having parameters different from the other two.
- the single mode optical fiber 1 has Blue light having a wavelength of ⁇ 1 is incident, green light having a wavelength of ⁇ 2 is incident on the single-mode optical fiber 2, red light having a wavelength of ⁇ 3 is incident on the single-mode optical fiber 3, The combined light having the wavelengths ⁇ 1, ⁇ 2, and ⁇ 3 is emitted from the single mode optical fiber 1.
- the three-wavelength optical multiplexer 100 in the embodiment includes a secondary mode cutoff wavelength C1 of the single mode optical fiber 1 and the single mode optical fiber 2, a secondary mode cutoff wavelength C2 of the single mode optical fiber 3, and a single mode optical fiber 1.
- the relationship with the wavelength ⁇ 3 of the red light incident from the mode optical fiber 3 is C1 ⁇ C2 ⁇ 3.
- the three-wavelength optical multiplexer 100 in the comparative example 1 is such that the relationship between the wavelength of the light incident on the single mode optical fibers 1, 2, and 3 and the secondary mode cutoff wavelength is C1 ⁇ 1, ⁇ 2 and ⁇ 3. That is, in Comparative Example 1, the secondary mode cutoff wavelengths of all the single mode optical fibers 1, 2, and 3 are smaller than the wavelength bands ⁇ 1, ⁇ 2, and ⁇ 3 of the incident light.
- the three-wavelength optical multiplexer 100 in the comparative example 2 includes the single mode optical fibers 1 and 3 having the same parameters and the single mode optical fiber 2 having parameters different from the other two.
- the light incident on the single mode optical fiber 2 and the single mode optical fiber 3 is opposite to that of the embodiment.
- FIGS. 8 to 10 are graphs showing the transmittance with respect to the wavelength of the light emitted from FIG.
- FIG. 8 is a graph of wavelength versus transmittance in Comparative Example 1.
- the light emitted to the output port 1-2 has an output peak value close to 80% at a blue wavelength of 446 nm. be able to.
- the light emitted to the output port 1-2 can obtain an output peak value of 100% at a red wavelength of 635 nm.
- the light emitted to the output port 1-2 can only obtain an output peak value of about 40% at a green wavelength of 532 nm. , Well below the target standard transmittance of 60%.
- FIG. 9 is a graph of wavelength versus transmittance in Comparative Example 2.
- the light emitted to the output port 1-2 has an output peak value of nearly 100% at a blue wavelength of 446 nm. be able to.
- the light emitted to the output port 1-2 can only obtain an output peak value of about 10% at a red wavelength of 635 nm.
- the light emitted to the output port 1-2 can only have an output peak value of about 10% at a green point wavelength of 532 nm. It is not possible, and it is far below the target transmittance of 60%.
- FIG. 10 is a graph of wavelength versus transmittance in the examples.
- the light emitted to the output port 1-2 can obtain an output peak value of 70% at a blue wavelength of 446 nm. Can do.
- the light emitted to the output port 1-2 can obtain an output peak value of 80% or more at a red wavelength of 635 nm.
- the light emitted to the output port 1-2 is at a reference wavelength of 60% or more at the emission peak value at the green wavelength of 532 nm. Can be obtained.
- the single mode optical fiber A having the same parameter is used for the single mode optical fibers 1 and 2 as in the embodiment, and the single mode optical fiber B having a parameter different from the other two is used for the single mode optical fiber 3. Furthermore, when blue light is incident on the single mode optical fiber 1, green light is incident on the single mode optical fiber 2, and red light is incident on the single mode optical fiber 3, the light is incident as a result. In addition, it is possible to multiplex light of three wavelengths with a transmittance equal to or higher than a target reference (60%).
- the three-wavelength optical multiplexer 100 includes three single-mode optical fibers 1, single-mode optical fibers 2, and single-mode optical fibers 3 that perform single-mode transmission.
- the single mode optical fibers are arranged in parallel with each other in this order as seen from the cross-sectional direction orthogonal to the fiber axis direction, and the single mode optical fiber 1 and the single mode optical fiber 3 are not in contact with each other.
- the single mode optical fiber 1 and the single mode optical fiber 2 of the three single mode optical fibers have the same parameters, and are arranged in contact with the single mode optical fiber 2 respectively.
- the fiber 3 has different parameters from the other two single mode optical fibers 1 and 2.
- the single mode optical fiber 1 receives light having a wavelength of ⁇ 1.
- the light having the wavelength of ⁇ 2 is incident on the single mode optical fiber 2
- the light having the wavelength of ⁇ 3 is incident on the single mode optical fiber 3
- the incident three-wavelength light can be multiplexed with a transmittance equal to or higher than a certain standard (60%). Furthermore, since the three single-mode optical fibers 1, 2, and 3 have an integrated configuration, the size is small.
- the three-wavelength optical multiplexer 100 has the single mode optical fiber 1, the single mode optical fiber 2, and the single mode optical fiber 3 arranged in parallel in this order on the same plane. .
- the single mode optical fiber 1, the single mode optical fiber 2, and the single mode optical fiber 3 are arranged in parallel on the same plane, it is easy to package and stable quality can be realized. .
- the single mode optical fiber 1, the single mode optical fiber 2, and the single mode optical fiber 3 are single mode optical fibers, and the three single mode optical fibers 1, 2, and 3 are It is fused and stretched at once.
- the single mode optical fiber 1, the single mode optical fiber 2, and the single mode optical fiber 3 use the single mode optical fiber, and the three single mode optical fibers 1, 2, and 3 are collectively. Since it is fusion-stretched, the optical coupling part 6 with easy and stable quality can be produced.
- one of the parameters is the secondary mode cutoff wavelength
- the secondary mode cutoff wavelength C1 of the single mode optical fiber 1 and the single mode optical fiber 2 is the same.
- the relationship between the secondary mode cutoff wavelength C2 of the single mode optical fiber 3 and the wavelength ⁇ 3 of the light incident from the single mode optical fiber 3 is C1 ⁇ C2 ⁇ 3.
- the emission ports 2-2 and 3-2 included in the single mode optical fiber 2 and the single mode optical fiber 3 according to the embodiment of the present invention are subjected to antireflection treatment.
- a substantially unnecessary light guide can be arranged, and the three-wavelength optical multiplexer 100 having three inputs and one output can be obtained.
- the light having the wavelength ⁇ 1 may be blue
- the light having the wavelength ⁇ 2 may be green
- the light having the wavelength ⁇ 3 may be red.
- the light incident from the incident ports 1-1, 2-1, and 3-1 of the three single mode optical fibers 1, 2, and 3 are blue, green, and red, respectively. It is not necessary to be limited to this. Any wavelength may be used as long as it corresponds to the wavelength and the secondary mode cutoff wavelength as shown in the embodiment of FIG.
- the certain standard of the output power is the transmittance of 60%, but it is not necessary to be limited to this, and it may be larger than 60% or smaller than 60%.
- the present invention can be used in a three-wavelength optical multiplexer that multiplexes light incident from three single mode optical fibers.
- Termination unit 100 3-wavelength optical multiplexer
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Abstract
Description
(3波長光合波器の構成)
(シングルモード光ファイバの特性)
(3波長光合波器の製造)
(比較例1,2と実施例)
(本実施形態の概要)
1-1 入射ポート
1-2 出射ポート
2 シングルモード光ファイバ
2-1 入射ポート
2-2 出射ポート
3 シングルモード光ファイバ
3-1 入射ポート
3-2 入射ポート
6 光結合部
10 終端部
100 3波長光合波器
Claims (13)
- シングルモード伝送する第一の導光体と、シングルモード伝送する第二の導光体と、シングルモード伝送する第三の導光体と、からなる3本の導光体を、ファイバ軸方向に直交する断面方向から見てこの順に互いに並行に配列した光合波器であって、
前記第一の導光体と前記第三の導光体は、お互い接触することなく、夫々前記第二の導光体のみと接触して配列されており、
3本の前記導光体のうち、前記第一の導光体と前記第二の導光体は、互いに等しいパラメータを有し、前記第三の導光体は、他の2本の前記導光体とは異なるパラメータを有しており、
夫々の3本の前記導光体から入射される光の波長の関係をλ1<λ2<λ3としたとき、前記第一の導光体には前記λ1の波長を有する光が入射され、前記第二の導光体には前記λ2の波長を有する光が入射され、前記第三の導光体には前記λ3の波長を有する光が入射され、前記λ1、λ2、λ3の波長を有する光の合波光が、前記第一の導光体から出射されることを特徴とする3波長光合波器。 - 前記第一の導光体、前記第二の導光体、および前記第三の導光体を、この順に同一平面上に互いに並行に配列した、請求項1に記載の3波長光合波器。
- 前記第一の導光体、前記第二の導光体、および前記第三の導光体が、シングルモード光ファイバであり、前記3本の導光体を一括で融着延伸していることを特徴とする請求項1に記載の3波長光合波器。
- 前記第一の導光体、前記第二の導光体、および前記第三の導光体が、シングルモード光ファイバであり、前記3本の導光体を一括で融着延伸していることを特徴とする請求項2に記載の3波長光合波器。
- 前記パラメータの一つが2次モードカットオフ波長であり、前記第一のシングルモード光ファイバおよび前記第二のシングルモード光ファイバの2次モードカットオフ波長C1と、前記第三のシングルモード光ファイバの2次モードカットオフ波長C2と、前記第三のシングルモード光ファイバから入射される光の波長λ3と、の関係が、C1<C2<λ3となることを特徴とする請求項3に記載の3波長光合波器。
- 前記パラメータの一つが2次モードカットオフ波長であり、前記第一のシングルモード光ファイバおよび前記第二のシングルモード光ファイバの2次モードカットオフ波長C1と、前記第三のシングルモード光ファイバの2次モードカットオフ波長C2と、前記第三のシングルモード光ファイバから入射される光の波長λ3と、の関係が、C1<C2<λ3となることを特徴とする請求項4に記載の3波長光合波器。
- 前記第二の導光体と、前記第三の導光体と、が有する前記出射ポートが、無反射処理されていることを特徴とする請求項1に記載の3波長光合波器。
- 前記第二の導光体と、前記第三の導光体と、が有する前記出射ポートが、無反射処理されていることを特徴とする請求項2に記載の3波長光合波器。
- 前記第二の導光体と、前記第三の導光体と、が有する前記出射ポートが、無反射処理されていることを特徴とする請求項3に記載の3波長光合波器。
- 前記第二の導光体と、前記第三の導光体と、が有する前記出射ポートが、無反射処理されていることを特徴とする請求項4に記載の3波長光合波器。
- 前記第二の導光体と、前記第三の導光体と、が有する前記出射ポートが、無反射処理されていることを特徴とする請求項5に記載の3波長光合波器。
- 前記第二の導光体と、前記第三の導光体と、が有する前記出射ポートが、無反射処理されていることを特徴とする請求項6に記載の3波長光合波器。
- 前記λ1の波長を有する光が青色、前記λ2の波長を有する光が緑色、前記λ3の波長を有する光が赤色、の可視光であることを特徴とする請求項1ないし12の何れか1項に記載の3波長光合波器。
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CN201080033458.7A CN102472871B (zh) | 2009-07-24 | 2010-07-16 | 三波长光合波器 |
US13/386,734 US8693827B2 (en) | 2009-07-24 | 2010-07-16 | Three-wavelength optical multiplexer |
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JP2009173313A JP5436964B2 (ja) | 2009-07-24 | 2009-07-24 | 3波長光合波器 |
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JP (1) | JP5436964B2 (ja) |
KR (1) | KR20120037953A (ja) |
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JP5436964B2 (ja) * | 2009-07-24 | 2014-03-05 | タツタ電線株式会社 | 3波長光合波器 |
US20180306978A1 (en) * | 2015-10-14 | 2018-10-25 | Sharp Kabushiki Kaisha | Optical multiplexer and image projection apparatus equipped with optical multiplexer |
CN106856255A (zh) * | 2015-12-09 | 2017-06-16 | 泰科电子(上海)有限公司 | 介质波导线缆接续方法和装置 |
JP2017129744A (ja) * | 2016-01-20 | 2017-07-27 | フォトンリサーチ株式会社 | 光合波装置 |
JP6722474B2 (ja) * | 2016-03-09 | 2020-07-15 | フォトンリサーチ株式会社 | マルチ波長レーザ光源モジュール、及び合波器付きマルチ波長レーザ光源モジュール |
DE102018114420A1 (de) * | 2018-06-15 | 2019-12-19 | Osram Opto Semiconductors Gmbh | Lichtfaser und beleuchtungsvorrichtung |
CN109061801B (zh) * | 2018-10-12 | 2024-02-20 | 广东国志激光技术有限公司 | 一种高功率信号合束器及其制作方法 |
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US20120128296A1 (en) | 2012-05-24 |
TWI507732B (zh) | 2015-11-11 |
US8693827B2 (en) | 2014-04-08 |
JP2011027985A (ja) | 2011-02-10 |
TW201131203A (en) | 2011-09-16 |
CN102472871A (zh) | 2012-05-23 |
JP5436964B2 (ja) | 2014-03-05 |
CN102472871B (zh) | 2014-03-19 |
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