JPH01248108A - Optical fiber and optical multiplexer/demultiplexer - Google Patents
Optical fiber and optical multiplexer/demultiplexerInfo
- Publication number
- JPH01248108A JPH01248108A JP7460888A JP7460888A JPH01248108A JP H01248108 A JPH01248108 A JP H01248108A JP 7460888 A JP7460888 A JP 7460888A JP 7460888 A JP7460888 A JP 7460888A JP H01248108 A JPH01248108 A JP H01248108A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- refractive index
- base material
- optical
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 66
- 230000003287 optical effect Effects 0.000 title claims description 14
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000003475 lamination Methods 0.000 claims abstract description 4
- 239000011521 glass Substances 0.000 abstract description 7
- 239000003989 dielectric material Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 235000007575 Calluna vulgaris Nutrition 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012905 input function Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、光通信において、光線路の光伝送モニター機
能、線路途中からの光入力機能などを実現するための光
合分波装置および合波・分波に使用する光ファイバに関
するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an optical multiplexing/demultiplexing device and a multiplexing device for realizing an optical transmission monitoring function of an optical line, an optical input function from the middle of the line, etc. in optical communication.・Related to optical fibers used for demultiplexing.
［従来の技術］
光分岐・分波装置として、ある波長の光は透過させ、別
のある波長の光は反射する誘電体多層膜が設計試作され
ている（例えば昭和５４年度電子通信学会総合全国大会
分冊８９２６０ 岡木他“誘電体多層膜を用いた光分
波器”）。この誘電体多層膜は高屈折率物質および低屈
折率物質の膜厚をかえながら２０層程度蒸着し作成され
ている。例えば屈折率の高い厚さ１．０８μｍの板（Ａ
）および屈折率の低い厚さ０．５ ｐｍの板（Ｂ）を交
互に１７層（ＡＢＡＢＡＢＡＢＡＢＡＢ八ＢＡＢＡ）重
ねると第へ図に示すような透過係数を有する誘電体多層
膜を得ることができる（石黒浩三他：「光学薄膜」 第
２版付録、共立出版１９８６年）。この構造の誘電体多
層膜に光を４５°の角度で入射させると波長１．３μｍ
の光を反射し、波長１．５５μｍの光を透過させること
ができる。[Prior art] A dielectric multilayer film that transmits light of a certain wavelength and reflects light of another wavelength has been designed and prototyped as an optical branching/demultiplexing device (for example, in the 1980 IEICE Comprehensive National Conference Volume 89260 Okaki et al. “Optical demultiplexer using dielectric multilayer film”). This dielectric multilayer film is created by depositing about 20 layers of high refractive index material and low refractive index material while changing the film thickness. For example, a 1.08 μm thick plate with a high refractive index (A
) and plates (B) with a low refractive index and a thickness of 0.5 pm are alternately stacked in 17 layers (ABABABABABAB8BABA) to obtain a dielectric multilayer film having a transmission coefficient as shown in Fig. Kozo Ishiguro et al.: “Optical Thin Films” 2nd edition supplement, Kyoritsu Shuppan 1986). When light is incident on a dielectric multilayer film with this structure at an angle of 45°, the wavelength is 1.3 μm.
It can reflect light with a wavelength of 1.55 μm and transmit light with a wavelength of 1.55 μm.
［発明が解決しようとする課題］
しかし、従来の誘電体多層膜は蒸着によって作成されて
いるので、膜厚の調節が非常に難しく、かつ均一な多層
膜を多量に生産することが難しいという問題があった。[Problems to be solved by the invention] However, since conventional dielectric multilayer films are created by vapor deposition, it is very difficult to adjust the film thickness, and it is difficult to mass produce uniform multilayer films. was there.
本発明はこのような従来の欠点を解決し、膜厚の調整が
容易で、かつ生産の容易な合分波装置および合分波装置
に使用し得る光ファイバを提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to solve these conventional drawbacks and to provide a multiplexing/demultiplexing device whose film thickness is easy to adjust and which is easy to produce, and an optical fiber that can be used in the multiplexing/demultiplexing device.
［課題を解決するための手段］
かかる目的を達成するために、本発明の光ファイバは屈
折率が互いに異なる２種の誘電体層が交互に複数回積層
された積層体を、積層方向と直角方向に延伸してなる構
造体を有することを特徴とする。[Means for Solving the Problems] In order to achieve the above object, the optical fiber of the present invention has a laminate in which two types of dielectric layers having different refractive indexes are alternately laminated multiple times, and is arranged perpendicularly to the lamination direction. It is characterized by having a structure extending in the direction.
ここで光ファイバは上述した構造体の少なくとも延伸方
向周囲が、２種の誘電体層のうち低屈折率の誘電体の屈
折率より高くない屈折率を有する材料で覆われ、かつ延
伸方向と直角方向の断面が円形状であってもよい。Here, the optical fiber is such that at least the periphery of the above-mentioned structure in the stretching direction is covered with a material having a refractive index not higher than the refractive index of the dielectric with the lower refractive index of the two types of dielectric layers, and is perpendicular to the stretching direction. The cross section in the direction may be circular.
本発明合分波装置は上述した光ファイバの側面に、２以
上の異なる波長を含む光を入射して分渡し、または該光
ファイバの側面に少なくとも２方向からそれぞれ波長の
異なる光を入射して合波することを特徴とする。The multiplexing/demultiplexing device of the present invention inputs light containing two or more different wavelengths into the side surface of the optical fiber and divides it, or inputs light beams with different wavelengths into the side surface of the optical fiber from at least two directions. It is characterized by combining waves.
本発明の構成を、−具体例を示す第１図によって説明す
る。The configuration of the present invention will be explained with reference to FIG. 1 showing a specific example.
第１図（Ａ）は低屈折率の層１と高屈折率の層２とが交
互に複数回積層された誘電体多層構造体３を、第１図（
Ｂ）は構造体３の周囲をクラッド４で囲んだ断面円形の
光ファイバ５を示す。クラッド４の屈折率は低屈折率層
１の屈折率以下とする。FIG. 1(A) shows a dielectric multilayer structure 3 in which a layer 1 with a low refractive index and a layer 2 with a high refractive index are alternately laminated multiple times.
B) shows an optical fiber 5 having a circular cross-section with a structure 3 surrounded by a cladding 4. The refractive index of the cladding 4 is equal to or lower than the refractive index of the low refractive index layer 1.
本発明の光ファイバは、通常の通信用光ファイバと同様
の方法で作成できる。すなわち完成時の誘電体多層構造
の設計寸法と相似の形状の母材を作成し、線引きするこ
とによって作成することができる。第２図は母材の形状
の一例を示し、同図（Ａ）は屈折率の異なる話電体材料
６および７を所定の厚さに加工して重ね合せた誘電体多
層構造母材８を、図（Ｂ）は母材８をガラスパイプ９に
挿入し、母材８とパイプ９の空隙にバイブ９と同質のガ
ラス棒ｌＯを挿入充填して空隙を埋めた構造の光フアイ
バ母材１１を示す。The optical fiber of the present invention can be produced in the same manner as ordinary communication optical fibers. That is, it can be created by creating a base material with a shape similar to the design dimensions of the completed dielectric multilayer structure and drawing it. Figure 2 shows an example of the shape of the base material, and Figure (A) shows a dielectric multilayer structure base material 8 in which telephone body materials 6 and 7 having different refractive indexes are processed to a predetermined thickness and overlapped. , Figure (B) shows an optical fiber base material 11 having a structure in which a base material 8 is inserted into a glass pipe 9, and a glass rod lO of the same quality as the vibrator 9 is inserted and filled into the gap between the base material 8 and the pipe 9 to fill the gap. shows.
［作 用］
本発明の光ファイバは、大型の母材段階で４Ｍ 電体多
層構造を組み立てたのち、線引きすることで所定の誘電
体多層構造を得ることができる。また線引きにより作成
されるので、長手方向に均一な誘電体多層構造を一度に
多量に製造することかでき、蒸着に比べ容易に多量の誘
電体多層構造を製造することができる。[Function] In the optical fiber of the present invention, a predetermined dielectric multilayer structure can be obtained by assembling a 4M electric multilayer structure in the stage of a large base material and then drawing the fiber. Furthermore, since it is created by wire drawing, a large amount of dielectric multilayer structures that are uniform in the longitudinal direction can be manufactured at one time, and a large amount of dielectric multilayer structures can be manufactured more easily than by vapor deposition.
次に本発明の光ファイバの動作を、円柱状の光ファイバ
を例とし、第３図を参照して説明する。Next, the operation of the optical fiber of the present invention will be explained using a cylindrical optical fiber as an example with reference to FIG.
第３図において、１２は本発明による光ファイバ、 １
２八は誘電体多層構造体である。図（Ａ）に示すように
、第１の光ファイバ１３から波長λ１および波長λ２の
光が光ファイバ１２の側面に入射されると、ある波長λ
、の光はそのまま透過し、光ファイバ１４に入射され、
他の波長λ２の光は構造体１２Ａにより反射され光ファ
イバ１５に入射される。In FIG. 3, 12 is an optical fiber according to the present invention, 1
28 is a dielectric multilayer structure. As shown in FIG.
The light of , passes through as it is and enters the optical fiber 14,
Light with another wavelength λ2 is reflected by the structure 12A and enters the optical fiber 15.
これが分波である。１２Ａ、１３Ａおよび１４Ａは各光
ファイバ１２ｊ３および１４のコアを示す。逆に、光フ
ァイバ１４および１５から波長の異なる光を入射すると
、光ファイバ１３に２つの波長の光が入射される。これ
が合波である。このとき、光ファイバ１２の形状が円柱
状であると、図（Ｂ）に示すようにレンズ効果が働き、
より有効に光の分波・合波を実現する。但し、光ファイ
バ１２のクラッド１２Ｂの屈折率ｎｌと、その外の屈折
率口２の関係はｎｌ＞ｎ２であ［実施例］
以下に図面を参照して本発明の詳細な説明する。This is a branch wave. 12A, 13A and 14A indicate the cores of the optical fibers 12j3 and 14, respectively. Conversely, when light of different wavelengths is input from the optical fibers 14 and 15, light of two wavelengths is input to the optical fiber 13. This is the wave combination. At this time, if the shape of the optical fiber 12 is cylindrical, a lens effect will work as shown in Figure (B).
Achieve more effective demultiplexing and multiplexing of light. However, the relationship between the refractive index nl of the cladding 12B of the optical fiber 12 and the other refractive index opening 2 is nl>n2 [Example] The present invention will be described in detail below with reference to the drawings.
第４図に示すように、内径りが３６ｍｍの石英パイプ２
１内に厚さ０．３２ｍｍのＴｌＯ２ガラス板（屈折率２
．３）８枚と厚さ０ 、１６ｍｍの石英ガラス板（屈折
率１．４６）７枚を交互に重ねた積層構造体２２を挿入
し、その両側を断面が半円状の石英棒２３および２４で
挟んで光フアイバ母材２５とした。積層構造体２２の幅
は石英バイブ２１の内径よりやや小さくしである。As shown in Figure 4, a quartz pipe 2 with an inner diameter of 36 mm
1 contains a 0.32 mm thick TlO2 glass plate (refractive index 2
．． 3) Insert a laminated structure 22 in which 8 sheets and 7 sheets of 16 mm quartz glass plates (refractive index 1.46) are stacked alternately, and quartz rods 23 and 24 with semicircular cross sections are inserted on both sides. An optical fiber base material 25 was obtained by sandwiching the optical fiber between the two. The width of the laminated structure 22 is slightly smaller than the inner diameter of the quartz vibrator 21.
母材２５の表面のみを加熱溶融させ一体化したのち、線
引きして第５図に示すような、外径ｄが１２５μｌの光
ファイバ２６を作成した。２６Ａは誘電体多層構造体で
ある。線引き時にはファイバの破断を防ぐためシリコー
ン樹脂を０．２ｍｍ外径まで被覆した。After heating and melting only the surface of the base material 25 to integrate it, an optical fiber 26 having an outer diameter d of 125 μl as shown in FIG. 5 was produced by drawing. 26A is a dielectric multilayer structure. During drawing, the fiber was coated with silicone resin to an outer diameter of 0.2 mm to prevent the fiber from breaking.
第６図は誘電体多層構造体２６＾の拡大断面図であり、
２７はＴｉＯ２層、２８は５１０２層である。ＴｉＯ２
層２７の厚さは１μ■、Ｓｉｎ、層２８の厚さは０，５
μ■である。FIG. 6 is an enlarged cross-sectional view of the dielectric multilayer structure 26^,
27 is a TiO2 layer, and 28 is a 5102 layer. TiO2
The thickness of the layer 27 is 1 μ■, Sin, and the thickness of the layer 28 is 0.5
μ■.
第７図に、本発明の光ファイバを用いた光合分波器の例
を示す。FIG. 7 shows an example of an optical multiplexer/demultiplexer using the optical fiber of the present invention.
シリコン樹脂被覆を除いた本発明の光ファイバ２６の側
面に、それぞれ端面を軸方向と直角に切断した３本の単
一モード光ファイバ３１．３２および３３を接触させた
。光フアイバ２６中の誘電体多層構造体２６Ａの面と、
各単一モード光ファイバの光軸との角度が４５゛ とな
るように、それぞれを配設した。３１八、３２八および
３３八はそれぞれ各単一モード光ファイバ３１．３２お
よび３３のコアを示す。ＬＥＤなどの光源３４から第１
の単一モード光ファイバ３１に波長１．５５μｍおよび
１．３μｍの光を入射し、単一モード光ファイバ３２お
よび３３を透過する光のパワーを光パワーメータ３５お
よび３６によって測定した。光ファイバ２６を挿入しな
い状態（単一モード光ファイバ３１と３２との端面間隙
は０．１３ｍｍ） （Ｄａ−モード光ファイバ３２の受
光パワーをＰｏ、光ファイバ２６を挿入した時の各単一
モード光ファイバ３２および３３の受光パワーをそれぞ
れＰ、およびＰ、として、光ファイバ２６の挿入による
損失Ｐ＋−ＰａおよびＰ２−Ｐ、を求めた。光ファイバ
３２においてはＰＩ−ＰＧの値は波長１．３μｍの光で
一３０ｄＢであり、波長１．５５μｍの光では−１，４
ｄＢであった。一方、入射ファイバと直交する位置の単
一モード光ファイバ３３においては、Ｐ２−ＰＧの値は
波長１．３μｍの光で−０，７ｄＢ、波長・１．５５μ
ｎ＋の光での損失は一４３ｄＢであった。このように本
発明による光ファイバ２６が分波機能を有していること
が確かめられた。Three single mode optical fibers 31, 32 and 33, each of which had its end face cut perpendicular to the axial direction, were brought into contact with the side surface of the optical fiber 26 of the present invention with the silicone resin coating removed. A surface of the dielectric multilayer structure 26A in the optical fiber 26,
Each single mode optical fiber was arranged so that the angle with the optical axis was 45°. 318, 328 and 338 indicate the cores of each single mode optical fiber 31, 32 and 33, respectively. A first light source 34 such as an LED
Light with wavelengths of 1.55 μm and 1.3 μm was input into the single mode optical fiber 31, and the power of the light transmitted through the single mode optical fibers 32 and 33 was measured using optical power meters 35 and 36. State where the optical fiber 26 is not inserted (the end face gap between the single mode optical fibers 31 and 32 is 0.13 mm) (The received light power of the Da-mode optical fiber 32 is Po, and each single mode when the optical fiber 26 is inserted. The losses P+-Pa and P2-P due to the insertion of the optical fiber 26 were determined by assuming the received power of the optical fibers 32 and 33 to be P and P, respectively.In the optical fiber 32, the value of PI-PG is equal to the wavelength 1. It is -30 dB for light with a wavelength of 3 μm, and -1.4 dB for light with a wavelength of 1.55 μm.
It was dB. On the other hand, in the single mode optical fiber 33 located perpendicular to the input fiber, the value of P2-PG is -0.7 dB for light with a wavelength of 1.3 μm, and the value of P2-PG is -0.7 dB for light with a wavelength of 1.55 μm.
The loss for n+ light was -43 dB. In this manner, it was confirmed that the optical fiber 26 according to the present invention has a demultiplexing function.
合波は分波と全く逆の作用であって、単一モード光ファ
イバ３２および３３に異なる波長の光を入射して単一モ
ード光ファイバ３１に合波することができる。Multiplexing is the exact opposite of demultiplexing, and light of different wavelengths can be input into single mode optical fibers 32 and 33 and multiplexed into single mode optical fiber 31.
［発明の効果］
以上説明したように、本発明のファイバは、側面から光
がある角度で入射されると、入射される光の波長により
透過率が異なるため、分波・合波を行う装置の構成部品
として有効であり、かつ従来の蒸着によって作る方法に
比べ容易でかつ一度に多量に製造することが可能であり
、分波・合波装置の低価格化に貢献することができる。[Effects of the Invention] As explained above, the fiber of the present invention has a transmittance that differs depending on the wavelength of the incident light when light is incident from the side at a certain angle. It is effective as a component of a device, and it is easier than the conventional method of manufacturing by vapor deposition and can be manufactured in large quantities at one time, contributing to lower prices of demultiplexing and multiplexing devices.
第１図は本発明の光ファイバの構成例を示す斜視図、
第２図は本発明の光フアイバ作成用母材の一例を示す斜
視図、
第３図は本発明光ファイバの動作を説明する図、第４図
は光フアイバ母材の斜視図、
第５図は本発明光ファイバの断面図、
第６図は本発明誘電体多層構造体の拡大断面図、第７図
は本発明による光合分波器の模式図、第８図は従来の誘
電体多層膜の透過率を示す特性図である。
１・・・低屈折率層、
２・・・高屈折率層、
３・・・誘電体多層構造体、
４・・・クラッド、
５・・・本発明光ファイバ、
６・・・低屈折率誘電体、
７・・・高屈折率誘電体、
８・・・誘電体多層構造体母材、
９・・・ガラスパイプ、
ｌＯ・・・ガラス棒、
１１・・・光フアイバ母材、
１２・・・光ファイバ、
１２八・・・誘電体多層構造体、
１３．１４．１５・・・単一モード光ファイバ、２１・
・・石英バイブ、
２２・・・積層構造体、
２３．２４・・・石英棒、
２５・・・光フアイバ母材、
２６・・・光ファイバ、
２［ｉＡ・・・誘電体多層構造体、
２７・＝ＴｉＯｚ層、
２８・・・５ｉ０２層、
３１．３２．３３・・・単一モード光ファイバ、３４・
・・光源、
３５．３６・・・光パワーメータ。
（Ａ） （Ｂ）
ｆ−発明の光フフイバのイ再戒イ列乞斤、７・斜視図第
１図
（Ａ） （３）
参発明の九フフイハイ乍用母材の一イ列を示壬糾視図第
２図
第：３０
九フ７／ｌハ丑木才の徐斗オ見エロ
第３１Ｅ」
ｆ′発９月光ファイバの一斤面汀コ
第５図
第６ 因
不発日月によろ光合５皮募のｊＦｌ弐図笥゛７図
イ芝采の言奪電イ杢多層嗅の透送率乞示１午予１・１図
第８図FIG. 1 is a perspective view showing an example of the structure of the optical fiber of the present invention, FIG. 2 is a perspective view showing an example of the base material for producing the optical fiber of the present invention, and FIG. 3 explains the operation of the optical fiber of the present invention. 4 is a perspective view of the optical fiber base material, FIG. 5 is a sectional view of the optical fiber of the present invention, FIG. 6 is an enlarged sectional view of the dielectric multilayer structure of the present invention, and FIG. 7 is an optical fiber composite according to the present invention. FIG. 8, which is a schematic diagram of a duplexer, is a characteristic diagram showing the transmittance of a conventional dielectric multilayer film. DESCRIPTION OF SYMBOLS 1...Low refractive index layer, 2...High refractive index layer, 3...Dielectric multilayer structure, 4...Clad, 5...Optical fiber of the present invention, 6...Low refractive index Dielectric material, 7... High refractive index dielectric material, 8... Dielectric multilayer structure base material, 9... Glass pipe, lO... Glass rod, 11... Optical fiber base material, 12. ...Optical fiber, 128...Dielectric multilayer structure, 13.14.15...Single mode optical fiber, 21.
...Quartz vibe, 22...Laminated structure, 23.24...Quartz rod, 25...Optical fiber base material, 26...Optical fiber, 2[iA...Dielectric multilayer structure, 27.=TiOz layer, 28..5i02 layer, 31.32.33..Single mode optical fiber, 34.
...Light source, 35.36...Optical power meter. (A) (B) f- Invention of the optical fiber of the invention, 7. Perspective view Figure 1 (A) Examination diagram Figure 2 Figure 30 9F 7/L Ha Ushiki Sai's Xu Doo O-view Erotic No. 31E'f' Emitted September Optical fiber's surface Figure 5 Figure 6 Cause of misfire Sun and Moon Koai 5 skin recruitment jFl 2 drawings 7 drawings I Shiba ware's power supply heather multi-layer scent transmission rate 1 pm forecast 1.1 drawing Fig. 8
Claims (1)
回積層された積層体を、積層方向と直角方向に延伸して
なる構造体を有することを特徴とする光ファイバ。 ２）請求項１記載の構造体の少なくとも延伸方向周囲が
、前記２種の誘電体層のうち低屈折率の誘電体の屈折率
より高くない屈折率を有する材料で覆われ、かつ延伸方
向と直角方向の断面が円形状であることを特徴とする光
ファイバ。 ３）請求項１または２に記載の光ファイバの側面に、２
以上の異なる波長を含む光を入射して分波し、または該
光ファイバの側面に少なくとも２方向からそれぞれ波長
の異なる光を入射して合波することを特徴とする光合分
波装置。[Claims] 1) A structure comprising a laminate in which two types of dielectric layers having different refractive indices are alternately laminated multiple times and stretched in a direction perpendicular to the lamination direction. optical fiber. 2) At least the periphery in the stretching direction of the structure according to claim 1 is covered with a material having a refractive index that is not higher than the refractive index of the dielectric having a lower refractive index among the two types of dielectric layers, and An optical fiber characterized by having a circular cross section in the right angle direction. 3) On the side surface of the optical fiber according to claim 1 or 2, 2
An optical multiplexing/demultiplexing device characterized by inputting and demultiplexing light including the above different wavelengths, or inputting and multiplexing light having different wavelengths from at least two directions onto the side surface of the optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63074608A JP2558800B2 (en) | 1988-03-30 | 1988-03-30 | Optical fiber, optical multiplexer / demultiplexer, and optical fiber manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63074608A JP2558800B2 (en) | 1988-03-30 | 1988-03-30 | Optical fiber, optical multiplexer / demultiplexer, and optical fiber manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01248108A true JPH01248108A (en) | 1989-10-03 |
| JP2558800B2 JP2558800B2 (en) | 1996-11-27 |
Family
ID=13552058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63074608A Expired - Fee Related JP2558800B2 (en) | 1988-03-30 | 1988-03-30 | Optical fiber, optical multiplexer / demultiplexer, and optical fiber manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2558800B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6266205A (en) * | 1985-09-17 | 1987-03-25 | シ−メンス、アクチエンゲゼルシヤフト | Edge interference filter for wavelength multiplex optical communication |
-
1988
- 1988-03-30 JP JP63074608A patent/JP2558800B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6266205A (en) * | 1985-09-17 | 1987-03-25 | シ−メンス、アクチエンゲゼルシヤフト | Edge interference filter for wavelength multiplex optical communication |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2558800B2 (en) | 1996-11-27 |
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