JP5627501B2 - 曲げ不感性マルチモードファイバにおける高次モードのモード遅延の均等化 - Google Patents
曲げ不感性マルチモードファイバにおける高次モードのモード遅延の均等化 Download PDFInfo
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- JP5627501B2 JP5627501B2 JP2011030504A JP2011030504A JP5627501B2 JP 5627501 B2 JP5627501 B2 JP 5627501B2 JP 2011030504 A JP2011030504 A JP 2011030504A JP 2011030504 A JP2011030504 A JP 2011030504A JP 5627501 B2 JP5627501 B2 JP 5627501B2
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- 239000000835 fiber Substances 0.000 title description 15
- 239000013307 optical fiber Substances 0.000 claims description 40
- 238000005253 cladding Methods 0.000 claims description 29
- 238000005452 bending Methods 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000377 silicon dioxide Substances 0.000 claims description 5
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- 238000013461 design Methods 0.000 description 29
- 208000002447 Macrophagic myofasciitis Diseases 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 8
- 238000012937 correction Methods 0.000 description 6
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- 238000010168 coupling process Methods 0.000 description 5
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- 230000001934 delay Effects 0.000 description 5
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- 229920000638 styrene acrylonitrile Polymers 0.000 description 2
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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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0288—Multimode fibre, e.g. graded index core for compensating modal dispersion
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03622—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only
- G02B6/03627—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only arranged - +
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03638—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only
- G02B6/0365—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only arranged - - +
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Optical Communication System (AREA)
Description
Claims (7)
- マルチモード光ファイバであって、断面で、
a.予め定められた屈折率を有する材料によるコアと、
b.前記コアを取り囲みかつ前記コアに接触する第1のクラッドとを備え、前記第1のクラッドは前記コアの屈折率よりも低い屈折率を有し、さらに、
c.前記第1のクラッドを取り囲む第2のクラッドを備え、前記第2のクラッドは前記第1のクラッドの屈折率よりも低い屈折率を有し、さらに、
d.前記第2のクラッドを取り囲む第3のクラッドを備え、前記第3のクラッドはシリカの屈折率にほぼ同じ屈折率を有し、
前記光ファイバが、
前記クラッドdの屈折率よりも高い有効屈折率ですべての導波モードに対してほぼ等しいモード遅延と、
850nmにおいて10Gbitあるいはより高いビット率のVCSELと結合されたときに、≦10mmの曲げ直径で0.1dB/ループより小さく、かつ≦5mmの曲げ直径で0.3dB/ループより小さい曲げ損失とを有し、
前記コアが、名目上rnomまで広がるアルファ屈折率プロファイルを有する第一の部分、及び位置rsにおけるコアプロファイルのエッジにステップ屈折率プロファイルを有する第2の部分を有し、前記コアの前記第1の部分が最大屈折率nmaxを有し、かつ前記コアの前記第2の部分は、0.05n max から0.155n max の範囲に最大屈折率を有し、そして、rnomの0.92から0.98の間の位置rsを有し、
前記4つの領域の屈折率プロファイルが、
を有し、ここで、n(r)は半径位置rにおける絶対屈折率であり、n clad はクラッドの絶対屈折率であり、rは半径位置であり、Δ、Δ 1 、Δ 2 は相対屈折率差であり、かつr core はコア半径であり、かつα、Jおよびmはコア形状であることを特徴とするマルチモード光ファイバ。 - 0<J<0.0025である、請求項1に記載のマルチモード光ファイバ。
- 0≧Δ1≧−0.02%であり、かつ、1.1%≧Δ≧0.8%である、請求項1に記載のマルチモード光ファイバ。
- Δ2・nclad=a2(rtr1−rcore−x0)2+a1(rtr1−rcore−x0)+a0
であり、ここでa2は−0.010から−0.040の範囲であり、a1は−0.002から−0.02の範囲であり、a0は−0.0045から−0.0066の範囲である、請求項1に記載のマルチモード光ファイバ。 - −0.004≧Δ2・nclad≧−0.011である
ことを特徴とする請求項1に記載のマルチモード光ファイバ。 - 0≦m≦0.0002であり、かつ、rcore−4≦r0≦rcore−1である、請求項1に記載のマルチモード光ファイバ。
- a)高速度レーザ送信機と、
b)高速度光受信機と、
c)前記送信機と前記受信機との間に結合された請求項1に記載のマルチモード光ファイバとを備える、システム。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/658,804 US7865050B1 (en) | 2010-02-16 | 2010-02-16 | Equalizing modal delay of high order modes in bend insensitive multimode fiber |
US12/658,804 | 2010-02-16 |
Publications (2)
Publication Number | Publication Date |
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JP2011170353A JP2011170353A (ja) | 2011-09-01 |
JP5627501B2 true JP5627501B2 (ja) | 2014-11-19 |
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US (1) | US7865050B1 (ja) |
JP (1) | JP5627501B2 (ja) |
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FR2953030B1 (fr) | 2009-11-25 | 2011-11-18 | Draka Comteq France | Fibre optique multimode a tres large bande passante avec une interface coeur-gaine optimisee |
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |