JPS5851249B2 - Optical wavelength selective coupling device - Google Patents
Optical wavelength selective coupling deviceInfo
- Publication number
- JPS5851249B2 JPS5851249B2 JP58012632A JP1263283A JPS5851249B2 JP S5851249 B2 JPS5851249 B2 JP S5851249B2 JP 58012632 A JP58012632 A JP 58012632A JP 1263283 A JP1263283 A JP 1263283A JP S5851249 B2 JPS5851249 B2 JP S5851249B2
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical waveguide
- coupled
- coupling
- periodic structure
- 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.)
- Expired
Links
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
- G02B6/293—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
- G02B6/29331—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 by evanescent wave coupling
- G02B6/29332—Wavelength selective couplers, i.e. based on evanescent coupling between light guides, e.g. fused fibre couplers with transverse coupling between fibres having different propagation constant wavelength dependency
- G02B6/29334—Grating-assisted evanescent light guide couplers, i.e. comprising grating at or functionally associated with the coupling region between the light guides, e.g. with a grating positioned where light fields overlap in the coupler
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
- Optical Communication System (AREA)
Description
【発明の詳細な説明】
本発明は波長多重化機能が得られる様に構成された光波
長選択結合装置に関し、特に低損失、高密度で、１個の
レーザより出力される多数の相異なる波長の信号を変調
し、多重化し１本の光導波路に送出する機能を有する光
波長選択結合装置を得ようとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical wavelength selective coupling device configured to obtain a wavelength multiplexing function, and in particular, to a wavelength selective coupling device configured to provide a wavelength multiplexing function, in particular, it is a low-loss, high-density optical wavelength multiplexing device that can multiplex multiple wavelengths output from a single laser. The present invention attempts to obtain an optical wavelength selective coupling device having the function of modulating and multiplexing the signals of the present invention and transmitting the signals to a single optical waveguide.
以下図面を用いて本発明を詳述する。The present invention will be explained in detail below using the drawings.
第１図は本発明を説明するための図であり、１つの光導
波路り。FIG. 1 is a diagram for explaining the present invention, and shows one optical waveguide.
（但し図に於てはそれが付方１で示されているコアを以
って示されている。(However, in the figure it is shown with the core shown in Figure 1.
）と、光導波路Ｌｏにその長さ方向に位置をずらして夫
々複数Ｎ個（但し図に於ては３個）の結合部Ｃ１，Ｃ２
・・・ＣＮを介して近接して配された複数Ｎ個の光導波
路Ｌ１．Ｌ２・・・ＬＮとにより結合導波路系が構成さ
れてなる構成に於て、光導波路り。), and a plurality of N (however, three in the figure) coupling portions C1, C2, respectively, shifted in position in the length direction of the optical waveguide Lo.
. . . A plurality of N optical waveguides L1. In a configuration in which a coupling waveguide system is constituted by L2...LN, an optical waveguide.
及びＬｌ、Ｌｏ及びＬ２、・・・Ｌｏ及びＬＮｆ’ａ’
ｌにおいて夫々互に異なる複数の波長λ１．λ２・・・
λＮに対して夫々逆方向性結合が得られるように結合部
Ｃ１，Ｃ２・・・ＣＮに複数Ｎ個の周期性構造Ｆ１．Ｆ
２．・・・ＦＮが形成された構成を有する。and Ll, Lo and L2, ...Lo and LNf'a'
A plurality of mutually different wavelengths λ1. λ2...
A plurality of N periodic structures F1 . F
2. ...has a configuration in which an FN is formed.
尚この場合の逆方向性結合は、光導波路り。Note that the reverse directional coupling in this case is an optical waveguide.
及びＬｌ（ｉ＝１，２・・・Ｎ）を伝播する導波モード
の位相定数を互いに異なるβ。and Ll (i=1, 2...N) with different phase constants of the guided modes β.
及びβＮ１周期性構造Ｆｉの周期を、／ｆｉとするとき
、なる関係が満足されるように周期性構造Ｆｉの周期Ａ
ｉが選定されているものである。and βN1 When the period of the periodic structure Fi is /fi, the period A of the periodic structure Fi is set so that the following relationship is satisfied.
i is selected.
但しく１）式に於てＫは整数で、通常１をとる。However, in formula 1), K is an integer, usually 1.
又周期性構造Ｆｉはそれ自体は公知であるが所謂凹凸グ
レーディングを施すことにより得られるものである。Although the periodic structure Fi is known per se, it can be obtained by applying so-called uneven grading.
このような構成によれば、周期性構造Ｆｉの長さＬｉ（
μｍ）に対する光導波路り。According to such a configuration, the length Li(
optical waveguide length (μm).
及びＬｉ間の逆方向性結合の結合率ηｉの関係と、長さ
Ｌｉと周期性構造Ｆｉの周期結合の強さＱｉ（周期性構
造Ｆｉの単位長当りの結合度）との積Ｑｉ−Ｌｉに対す
る結合ηｉの関係とが、
で与えられる△と周期結合の強さＱｉとの比△／Ｑｉを
パラメータとし且光導波路り。and the relationship between the coupling rate ηi of the reverse directional coupling between Li and the product Qi - Li of the length Li and the strength of periodic coupling Qi of the periodic structure Fi (degree of coupling per unit length of the periodic structure Fi) The relationship of the coupling ηi to the optical waveguide is expressed by using the ratio Δ/Qi between Δ and the periodic coupling strength Qi given by as a parameter and the optical waveguide.
及びＬｉのモード伝播損失α。and mode propagation loss α of Li.
及びαｉの夫々とＱｉとの比（α０／Ｑｉ、αｉ／Ｑｉ
）をパラメータとして第２図に示すように得られ、又波
長λｉの中心波長よりのずれ△λｉ■に対する結合率η
ｉ及び透過率Ｔｉ（光導波路り。and the ratio of αi to Qi (α0/Qi, αi/Qi
) is obtained as shown in Fig. 2 as a parameter, and the coupling rate η for the deviation △λi■ of wavelength λi from the center wavelength
i and transmittance Ti (optical waveguide).
が光導波路Ｌｉに結合するものとしてみたときの周期性
構造Ｆｉの配されている位置を透過する透過率で与えら
れる）の関係が長さＬｉをパラメータとして夫々第３図
実線及び点線図示のように得られるので、第２図のＬｉ
対対立１１びＱｉ−Ｌｉ対ηｉの関係、及び第３図の△
λｉ対η・ 及び△λ１対Ｔｉの関係よりＬｉの値を予
ｌ ）
め適当に選んで置くことにより、今光導波路り。(given by the transmittance through the position where the periodic structure Fi is arranged when it is assumed that the periodic structure Fi is coupled to the optical waveguide Li) is shown by the solid line and dotted line in Figure 3, respectively, using the length Li as a parameter. Therefore, Li in Figure 2
Relationship between pair opposition 11 and Qi-Li versus ηi, and △ in Fig. 3
By appropriately selecting the value of Li in advance from the relationships of λi vs. η・ and Δλ1 vs. Ti, the optical waveguide can now be constructed.
の一端より波長λ１．λ２・・・λＮの光を実線で図示
したように入射すると考えれば、波長λ１の光を光導波
路Ｌｉを介して実線で図示したように外部に導出するこ
とができ、光分波機能が得られ、又光導波路Ｌ１．Ｌ２
・・・ＬＮに夫々波長λ１．λ２・・・λＮの光を点線
図示の如く入射させれば、之等を光導波路り。wavelength λ1. If we consider that light of wavelength λ2...λN is incident as shown by the solid line, then the light of wavelength λ1 can be led out through the optical waveguide Li as shown by the solid line, and an optical demultiplexing function can be obtained. and the optical waveguide L1. L2
...LN each have a wavelength λ1. If light of λ2...λN is made incident as shown by the dotted line, these will become an optical waveguide.
を介してその一端より点線で図示したように外部に導出
し得、従って光合波機能が得られるものである。As shown by the dotted line, the light can be led out from one end of the light via the dotted line, thus providing an optical multiplexing function.
このように第１図に示した構成によれば、光分波乃至合
波機能を得ることが出来、そしてこのような機能が光導
波路り。As described above, according to the configuration shown in FIG. 1, it is possible to obtain an optical demultiplexing or multiplexing function, and such a function is provided by an optical waveguide.
及びＬｉ間で逆方向性結合が得られるように結合部Ｃ１
に周期性構造Ｆｉ、を形成した構成により得られるので
、それ等の機能が低損失で得られると共に全体としての
装置を簡易、高密度に構成することができるという効果
が得られる。and Li to obtain a reverse directional bond.
Since the periodic structure Fi is obtained by forming the periodic structure Fi, these functions can be obtained with low loss, and the overall device can be constructed simply and with high density.
又導波路り。及びＬｉが互に異なる位相定数を有するの
で、結合部Ｃｉに於ける逆方向性結合についても高い結
合効率が得られるものである。Also a waveguide. Since Li and Li have mutually different phase constants, high coupling efficiency can be obtained even in the reverse direction coupling at the coupling portion Ci.
更に結合部Ｃｉに形成せる周期性構造Ｆｉが凹凸グレー
ディングによるものであるので、結合部Ｃｉに於て逆方
向性結合の得られる構、成を容易に得ることが出来るも
のである。Furthermore, since the periodic structure Fi formed in the bonding portion Ci is based on uneven grading, it is possible to easily obtain a configuration that provides reverse directional bonding in the bonding portion Ci.
尚更に周期性構造ＦｉをＱｉ、Ｌｉ≧３なる条件が満足
される様に構成することにより、第２図より明らかな如
く結合部Ｃ１に於ける逆方向性結合の結合率を結合長に
依存することなしに高い一定値で得ることが出来る等の
犬なる効果を有するものである。Furthermore, by configuring the periodic structure Fi so that the condition Qi, Li≧3 is satisfied, the coupling rate of the opposite direction bond in the coupling portion C1 depends on the bond length, as is clear from Fig. 2. It has the advantage of being able to obtain a high constant value without doing much.
第４図は、本発明の実施例を示し、第１図との対応部分
には同一符号を附して示している。FIG. 4 shows an embodiment of the present invention, and parts corresponding to those in FIG. 1 are designated by the same reference numerals.
第１図に示した構成に於て、光導波路り。In the configuration shown in FIG. 1, an optical waveguide.
、Ｌ１〜ＬＮの外光導波路り。, L1 to LN external optical waveguides.
と同様の光導波路Ｌｏ′と結合部Ｃ１，Ｃ２・・・ＣＮ
と同様の結合部Ｃ１′、Ｃ２′・・・ＣＨ２を介して近
接して配された光導波路Ｌ１．Ｌ２・・・ＬＮと同様の
光導波路Ｌ１’、Ｌ２’・・・ＬＮ’とを有する２つの
結合導波路系が構成され、又光導波路り。Similar optical waveguide Lo' and coupling parts C1, C2...CN
Optical waveguides L1 . Two coupled waveguide systems having optical waveguides L1', L2'...LN' similar to L2...LN are constructed, and an optical waveguide.
及び１６１間に波長λｉに対して逆方向性結合が得られ
るように結合部Ｃｉに周期性構造Ｆｉと同様の周期性構
造Ｆｉ′が形成され、一方光導波路り。A periodic structure Fi' similar to the periodic structure Fi is formed in the coupling portion Ci so as to obtain a reverse coupling with respect to the wavelength λi between and 161, and on the other hand, an optical waveguide.
０ 一端に波長λ１．λ２・・・λＮのレーザ光の得ら
れる多軸モード発振レーザＲが結合され、又光導波路Ｌ
ｉに光増幅器、注入同期型レーザ等の光増幅手段Ｇｉの
入力が結合され、又光増幅手段Ｇｉに変調器Ｍｉの入力
側が結合され、変調器Ｍｉの出力側が光導波路Ｌｉ′に
結合されている。0 wavelength λ1. A multi-axis mode oscillation laser R that can obtain laser light of λ2...λN is coupled, and an optical waveguide L
The input of an optical amplification means Gi such as an optical amplifier or an injection-locked laser is coupled to i, the input side of a modulator Mi is coupled to the optical amplification means Gi, and the output side of the modulator Mi is coupled to an optical waveguide Li'. There is.
このような構成によれば、第１図による波長分波、合成
機能の説明を参照すれば容易に理解できるように、光導
波路り。According to such a configuration, as can be easily understood by referring to the explanation of the wavelength demultiplexing and combining functions shown in FIG.
に伝播せる多軸モード発振レーザＲより得られる波長λ
１〜λ、のレーザ光に基き、波長λ１．λ２・−・λＮ
の光が夫々信号にて変調されてなる光出力が波長多重化
されて光導波路り。The wavelength λ obtained from the multi-axis mode oscillation laser R that propagates to
1 to λ, based on the laser light of wavelength λ1. λ2・−・λN
Each light is modulated with a signal, and the optical output is wavelength-multiplexed and sent to an optical waveguide.
′にて得られるという波長多重化機能が得られる。The wavelength multiplexing function that can be obtained with ' can be obtained.
而して斯る機能が第１図に示す場合と同様の効果を有し
つつ得られる。Thus, such a function can be obtained while having the same effect as in the case shown in FIG.
第１図は光分波乃至合波機能の得られるようになされた
光波長選択結合装置を示す路線的平面図、第２図はその
説明に供するＬｉ対ηｉ及びＱｉ。
Ｌ１対ηｉの関係を示す曲線図、第３図は同様の△λｉ
対η１１及び△λｉ対Ｔｉの関係を示す曲線図、第４図
は本発明による波長多重化機能の得られる様になされた
光波長選択結合装置の実施例を示す路線的平面図である
。
図中、Ｌｏ、Ｌｉ及・びＬ１２は光導波路）Ｃｏ、Ｃ１
及びＣｉ′は結合部；Ｆｉ及びＦｉ′は周期性構造、Ｒ
は多軸モード発振レーザ、Ｍｉは変調器、Ｇｉは光増幅
手段、１はコア層を夫々示す。FIG. 1 is a schematic plan view showing an optical wavelength selective coupling device designed to provide optical demultiplexing and multiplexing functions, and FIG. 2 shows Li vs. ηi and Qi for explanation. A curve diagram showing the relationship between L1 and ηi, FIG. 3 shows a similar Δλi
FIG. 4 is a curve diagram showing the relationship between η11 and Δλi versus Ti. FIG. 4 is a schematic plan view showing an embodiment of an optical wavelength selective coupling device that can obtain a wavelength multiplexing function according to the present invention. In the figure, Lo, Li and L12 are optical waveguides) Co, C1
and Ci' are bonding parts; Fi and Fi' are periodic structures, R
1 represents a multi-axis mode oscillation laser, Mi represents a modulator, Gi represents an optical amplification means, and 1 represents a core layer.
Claims (1)
ずらして夫々複数Ｎ個の結合部Ｃ１，Ｃ２・・・ＣＮを
介して近接して配された複数Ｎ個の光導波路Ｌ１．Ｌ２
・・・ＬＮと、上記光導波路Ｌ≦にその長さ方向に位置
をずらして夫々複数Ｎ個の結合部Ｃ１′、Ｃ２′・・・
ｃｔｔ介して近接して配された複数Ｎ個の光導波路Ｌ１
′、 Ｌ、！’・・・ＬＮＣを有する結合導波路系に於
て、上記光導波路り。 及びＬｉ （但しｉ：１ 、２・・・Ｎ）が互に位相定
数を異にし、上記光導波路り。 ′及びＬ ｉ／が互に位相定数を異にし、上記光導波路
り。 及びＬｌ、Ｌｏ及びＬ２・・・Ｌｏ及びＬＮ間にて夫々
互に異なる複数の波長λ１．λ２・・・λ、に対して夫
々逆方向性結合が得られるべく、上記複数Ｎ個の結合部
Ｃ１，Ｃ２・・・ＣＮに、夫々複数Ｎ個の凹凸グレーデ
ィングによる周期性構造Ｆ１．Ｆ２・・・ＦＮが、当該
周期性構造Ｆｉの周期結合の強さＱ、と長さＬｉとがＱ
ｉ−Ｌｉ≧３なる条件を満足する様に形成されて光分波
機能が得られる様になされ、上記光導波路り。 及びＬｌ。Ｌｏ′及びＬ１２・・・Ｌｏ′及びＬＮ’間
に、夫々上記波長λ１．λ２・・・λＮに対して夫々逆
方向性結合が得ら／／ ’ れるべく、上記複数Ｎ個の結合部Ｃ１，Ｃ２・・・ＣＮ
に、夫々複数の凹凸グレーディングによる周期性構造Ｆ
１′、Ｆ２′・・・ＦＮ’が、当該周期性構造Ｆｉ／の
周期結合の強さＱｉ／と長さＬｉｌとがＱｉ’−Ｌｉ’
≧３なる条件を満足する様に形成されて光合波機能が得
られる様になされ、上記光導波路り。 に多軸モード発振レーザが結合され、上記光導波路Ｌ１
゜Ｌ２・・・ＬＮに夫々複数Ｎ個の光増幅手段Ｇ、 、
Ｇ２、・・ＧＮの入力側が結合され、該光増幅手段Ｇ
１゜Ｇ２・・・ＧＮに夫々複数Ｎ個の変調器Ｍ１２Ｍ２
・・・ＭＮの入力側が結合され、該変調器Ｍ１２Ｍ２・
・・ＭＮの出力側が夫々上記光導波路り、’、Ｌ２’・
・・ＬＮ’に結合されて波長多重化機能が得られる様に
なされた事を特徴とする光波長選択結合装置。[Claims] Twelve optical waveguides. Andri. ' and the optical waveguide. A plurality of N optical waveguides L1 . L2
... LN, and a plurality of N coupling portions C1', C2', respectively, shifted in the length direction of the optical waveguide L≦.
A plurality of N optical waveguides L1 arranged in close proximity via ctt.
', L,! '...In a coupled waveguide system having an LNC, the above optical waveguide. and Li (however, i: 1, 2...N) have different phase constants from each other, and the optical waveguide is constructed as described above. ' and L i/ have mutually different phase constants, and the optical waveguide is constructed as described above. and Ll, Lo, and L2...a plurality of wavelengths λ1.. and Ll, Lo, and L2, which are mutually different between Lo and LN. In order to obtain reverse directional coupling with respect to λ2...λ, respectively, a periodic structure F1 . F2...FN is the periodic bond strength Q of the periodic structure Fi, and the length Li is Q
The above-mentioned optical waveguide is formed to satisfy the condition i-Li≧3 so as to obtain an optical demultiplexing function. and Ll. Lo' and L12 . . . between Lo' and LN', respectively, the wavelengths λ1. In order to obtain reverse directional coupling for λ2...λN, respectively, the plurality of N coupling parts C1, C2...CN
, periodic structure F with multiple unevenness grading, respectively.
1', F2'...FN' is the periodic bond strength Qi/ of the periodic structure Fi/ and the length Lil is Qi'-Li'
The above-mentioned optical waveguide is formed to satisfy the condition of ≧3 so as to obtain an optical multiplexing function. A multi-axis mode oscillation laser is coupled to the optical waveguide L1.
゜L2...LN each have a plurality of N optical amplification means G, ,
The input sides of G2, . . . GN are coupled, and the optical amplification means G
1°G2... A plurality of N modulators M12M2 for each GN
...The input side of MN is coupled, and the modulator M12M2.
・The output side of MN is the above-mentioned optical waveguide, ', L2'.
...An optical wavelength selective coupling device characterized in that it is coupled to LN' to obtain a wavelength multiplexing function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58012632A JPS5851249B2 (en) | 1983-01-31 | 1983-01-31 | Optical wavelength selective coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58012632A JPS5851249B2 (en) | 1983-01-31 | 1983-01-31 | Optical wavelength selective coupling device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54070279A Division JPS5851247B2 (en) | 1979-06-05 | 1979-06-05 | Optical wavelength selective coupling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58129849A JPS58129849A (en) | 1983-08-03 |
| JPS5851249B2 true JPS5851249B2 (en) | 1983-11-15 |
Family
ID=11810749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58012632A Expired JPS5851249B2 (en) | 1983-01-31 | 1983-01-31 | Optical wavelength selective coupling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5851249B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4726011A (en) * | 1985-04-08 | 1988-02-16 | Itt Defense Communications, A Division Of Itt Corporation | Coherent optical fiber communication with frequency-division-multiplexing |
| US4901306A (en) * | 1987-02-24 | 1990-02-13 | American Telephone And Telegraph Company, At&T Bell Laboratories | Wavelength-division multiplexed optical fiber network |
| US5339157A (en) * | 1993-02-19 | 1994-08-16 | At&T Bell Laboratories | Rapidly tunable integrated optical filter |
| EP0612164A1 (en) * | 1993-02-19 | 1994-08-24 | AT&T Corp. | Rapidly tunable windeband integrated optical filter |
| DE4326522A1 (en) * | 1993-08-06 | 1995-02-09 | Siemens Ag | Programmable optical filter and optical circuit arrangement |
| US5434937A (en) * | 1993-11-16 | 1995-07-18 | At&T Corp. | Optical filter having integrated transceivers |
-
1983
- 1983-01-31 JP JP58012632A patent/JPS5851249B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58129849A (en) | 1983-08-03 |
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