JPS6152604A - Optical multiplexer and demultiplexer - Google Patents

Optical multiplexer and demultiplexer

Info

Publication number
JPS6152604A
JPS6152604A JP17403684A JP17403684A JPS6152604A JP S6152604 A JPS6152604 A JP S6152604A JP 17403684 A JP17403684 A JP 17403684A JP 17403684 A JP17403684 A JP 17403684A JP S6152604 A JPS6152604 A JP S6152604A
Authority
JP
Japan
Prior art keywords
optical
wavelengths
demultiplexer
wavelength
optical multiplexer
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.)
Pending
Application number
JP17403684A
Other languages
Japanese (ja)
Inventor
Masaaki Matsuura
正明 松浦
Ryoichi Yamamoto
良一 山本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP17403684A priority Critical patent/JPS6152604A/en
Publication of JPS6152604A publication Critical patent/JPS6152604A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/12004Combinations of two or more optical elements

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

PURPOSE:To solve the difficulty for setting a parameter for further demultiplexing a wavelength of odd times exceeding three wavelengths by constituting the titled device so that a wavelength demultiplexed as a wavelength of odd times is set to <=2 wavelengths in an optical waveguide system of each stage, in a constitution for connecting in a multistage the optical waveguide system which has utilized an evanescent coupling. CONSTITUTION:Two optical waveguides 3 are connected adjacently so that an evanescent coupling is generated and interaction areas l1-l7 are constituted, and the areas l1-l4 are connected adjacently in series so as to satisfy the equation. First of all, in the area l1, wavelengths lambda4, lambda6 by which a length of the interaction area becomes odd times of a coupling length, and wavelengths lambda1, lambda2, lambda3, lambda5, lambda7, lambda8, and lambda9 by which said length becomes even times are demultiplexed, and the wavelengths of even times are made incident on the area l2. In the same way, in the area l2, the area l3, and the area l4, wavelengths lambda3, lambda7 of odd times and wavelenths lambda1, lambda2, lambda5, lambda8, and lambda9 of even times, wavelengths lambda2, lambda8 of odd times and wavelengths lambda1, lambda5, and lambda9 of even times, and wavelengths lambda1, lambda9 and a wavelength lambda5 are demultiplexed, respectively. On the other hand, the wavelengths of odd times which have been demultiplexed can be demultiplexed in the areas l5, l6, and l7, respectively. Also, in the reverse process, the multiplexing can also be realized.

Description

【発明の詳細な説明】 (産業上の利用分針) 本発明はエバネセント結合が生じる光辱波路系を多段接
続して構成し、複数波長を合分波する光合分波器に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Minute Hand) The present invention relates to an optical multiplexer/demultiplexer that is configured by connecting optical wave path systems in multiple stages in which evanescent coupling occurs, and multiplexes and demultiplexes a plurality of wavelengths.

・(従来の技術) 従来のエバネセント結合を利用した光合分波器は、例え
ば特願昭58−88719で述べられているように、1
組の光フアイバ対から構成されている。このような光合
分波器により、エバネセント結合の生じている相互作用
領域の長さがエバネセント結合の強さで決まる結合長の
奇数倍になる波長と偶数倍になる波長を合分波できる。
・(Prior art) A conventional optical multiplexer/demultiplexer using evanescent coupling, as described in Japanese Patent Application No. 58-88719,
It consists of a set of optical fiber pairs. With such an optical multiplexer/demultiplexer, it is possible to multiplex and demultiplex wavelengths where the length of the interaction region where evanescent coupling occurs is an odd number multiple of the coupling length determined by the strength of the evanescent coupling, and a wavelength where the length is an even number multiple.

すなわち一つの光合分波器で完全に合分波できるのは2
波長であり、複数波長を1・度に合分波することはでき
ない。複数波長を合分波するためにはこのような光合分
波器単体を多段接続する方法が示されている。
In other words, one optical multiplexer/demultiplexer can completely multiplex and demultiplex two
wavelength, and multiple wavelengths cannot be multiplexed or demultiplexed at once. In order to multiplex and demultiplex a plurality of wavelengths, a method has been proposed in which single optical multiplexers and demultiplexers are connected in multiple stages.

@6図は前記特願昭58−88719による8波長を対
象とした光合分波器単体の多段接続構成図であり、1は
光合分波器、2は光ファイバである。第6図中の光合分
波器1(四により相互作用領域の長さが結合長の偶数倍
になる波長λ0.λ、lλ5.λ、と奇数倍になる波長
λ、lλ1.λ、lλ8に分波される。以下、光合分波
器1(b)〜1(2)によ・り第1図の構成では波長を
逐次分波してゆくことになる。
Figure @6 is a multi-stage connection configuration diagram of a single optical multiplexer/demultiplexer for eight wavelengths according to the above-mentioned Japanese Patent Application No. 58-88719, where 1 is an optical multiplexer/demultiplexer and 2 is an optical fiber. Optical multiplexer/demultiplexer 1 in FIG. Thereafter, in the configuration shown in FIG. 1, wavelengths are sequentially demultiplexed by optical multiplexers/demultiplexers 1(b) to 1(2).

(本発明が解決しようとするrjIa点ンところで1奇
数倍の波長として分波された8波長以上をさらに分波す
るには光合分波器の相互作用領域の長さおよび光導波路
間隔を調整する必要がある。しかし光導波路間隔を変え
ると結合長の波長特性が変化し、例えば3波長中の2波
長に対しては相互作用領域の長さが結合長の偶数倍また
は奇数倍となるようにパラメータを設定できるが、この
時一般に残り1波長に対しては相互作用領域の長さが結
合長のちょうど整数倍ではなくなってくる。したがって
、第6図中で光合分波器1(a]で奇数倍の波長として
分波された波長λ2.λ、。
(rjIa point to be solved by the present invention) However, in order to further demultiplex 8 or more wavelengths that have been demultiplexed as 1 odd-numbered wavelengths, the length of the interaction region of the optical multiplexer/demultiplexer and the spacing between the optical waveguides must be adjusted. However, changing the optical waveguide spacing changes the wavelength characteristics of the coupling length. For example, for two of the three wavelengths, the length of the interaction region becomes an even or odd multiple of the coupling length. Parameters can be set, but at this time, generally for the remaining wavelength, the length of the interaction region is no longer just an integer multiple of the coupling length. Wavelength λ2.λ, which is demultiplexed as an odd-numbered wavelength.

λ6.λ8をさらに偶数倍の波長λ3.λ6と奇数倍の
波長λ6.λ8に完全に分波するための光合分波1i 
1 (C1のパラメータ設定が困難でクロストーク劣化
に結び付く問題点がある。
λ6. λ8 is further multiplied by an even number, λ3. λ6 and an odd multiple of wavelength λ6. Optical multiplexing/demultiplexing 1i for complete demultiplexing into λ8
1 (There is a problem that parameter setting of C1 is difficult and leads to crosstalk deterioration.

(問題点を解決するための手段) 本発明はエバネセント結合の生じる光導波路系・を多段
接続して複数波長用の光合分波器を構成する際に、一つ
の光導波路系により奇数倍の波長として分波される波長
が二つ以下になるように、各光導波路系における相互作
用領域の長さおよび分波波長系列を設定するものである
。以下図面により本発明の詳細な説明する。
(Means for Solving the Problems) The present invention provides an optical multiplexer/demultiplexer for multiple wavelengths by connecting optical waveguide systems in which evanescent coupling occurs in multiple stages. The length of the interaction region and the demultiplexing wavelength sequence in each optical waveguide system are set so that the number of wavelengths demultiplexed is two or less. The present invention will be explained in detail below with reference to the drawings.

第1図は本発明による光合分波器の光導波路構成および
分波過程を表わす概念図であり、3は光導波路である。
FIG. 1 is a conceptual diagram showing the optical waveguide configuration and demultiplexing process of an optical multiplexer/demultiplexer according to the present invention, and 3 is an optical waveguide.

第1図中l□、 1. 、1. 、1. 。In Figure 1, □, 1. , 1. , 1. .

1、.16およびl、の領域において2本の光導波路が
エバネセント結合の生じるようにlI4接されており、
相互作用領域を構成している。光導波路間隔が同じであ
り、相互作用領域の長さが次式を満たすl□* 12.
1.およびl、の相互作用領域を直列に多段隣接する。
1. In the regions 16 and 1, the two optical waveguides are in contact with 1I4 so that evanescent coupling occurs,
It constitutes an interaction area. The optical waveguide spacing is the same, and the length of the interaction region satisfies the following formula l□* 12.
1. The interaction regions of and l are arranged adjacent to each other in series.

tl−21,−4t8−814(1) 第1図の光導波路構成はこのような構成なので、次の関
係を満たす波長系列を10の領域に入射させる時、波長
λ 、λ ・・・・・、λ。は以下に述べる過□・程で
分波される。
tl-21, -4t8-814 (1) Since the optical waveguide configuration shown in FIG. ,λ. is demultiplexed in the process described below.

t、 m s(m−1)zo(λ1) = a(m+1
)to(λ、)(旬t、  −4+2m−1)jo(λ
、)  −4(2m+1)jo(λ8)     (8
)t、 −2+4m−1)jotλ3) −2+4m+
1)tofλ、)   +41t、 −(sm−i)1
0(λ、) −[8m+1)to(λ6)     (
51tx−amtc(λ、 )           
     +6まただしt。(λi ) (1””1 
* 2 +・・・19)は波長λ1の結合長、mは任意
の自然数である。まずt□の領域において式(勾〜(6
)より相互作用領域の長さが結合長の奇数倍になる波長
λ2.λ、と偶数倍になる波長λ0.λ3.λ8.λ5
.λ7.λ8.λ、が分波され、偶数倍の波長は次段の
相互作用領域13へ入射される。次にl!の領域におい
ては、式(1)と式(4)より波長λ8.λ、に対して
は相互作用E域の長さが結合長の奇数倍になり、また式
(1)〜(3)と式(6)より波長λ0.ス21λ5.
λ6.λ、に対しては相互作用領域の長さが結合長の偶
数倍になる。したがって、/2の領域において奇数倍の
波長、231λ7と偶数倍の波長λ0.λ8.λ5.λ
8Iλ、が分波され、偶数倍・の波長は次段の相互作用
領域t8へ入射される。さらに、式+1)〜(旬と式(
6)の関係より同様にして、l。
t, m s(m-1)zo(λ1) = a(m+1
)to(λ,)(junt, -4+2m-1)jo(λ
, ) −4(2m+1)jo(λ8) (8
)t, -2+4m-1) jotλ3) -2+4m+
1) tofλ, ) +41t, -(sm-i)1
0(λ,) −[8m+1)to(λ6) (
51tx-amtc(λ, )
+6 madashi t. (λi) (1””1
*2+...19) is the coupling length of wavelength λ1, and m is an arbitrary natural number. First, in the region of t□, the equation (gradient ~ (6
), the length of the interaction region is an odd number multiple of the bond length. λ, and the wavelength λ0. which is an even number multiple. λ3. λ8. λ5
.. λ7. λ8. λ is demultiplexed, and even-numbered wavelengths are incident on the interaction region 13 of the next stage. Next l! In the region of wavelength λ8. from equations (1) and (4). λ, the length of the interaction region E is an odd number multiple of the bond length, and from equations (1) to (3) and equation (6), the wavelength λ0. S21λ5.
λ6. For λ, the length of the interaction region is an even multiple of the bond length. Therefore, in the area of /2, the odd number times the wavelength is 231λ7, and the even number times the wavelength λ0. λ8. λ5. λ
8Iλ is demultiplexed, and the wavelengths of even multiples are incident on the next stage interaction region t8. Furthermore, expression + 1) ~ (Shun and expression (
Similarly, from the relationship 6), l.

の領域では奇数倍の波長λ3.λ8と偶数倍の波長λI
Iλ5.λ、が分波され、!、の領域では波長λ□。
In the region of wavelength λ3. Wavelength λI that is an even number multiple of λ8
Iλ5. λ, is demultiplexed, ! In the region of , the wavelength λ□.

λ、と波長λ、が分波される。式(2]〜(6]中の自
然数mの偶・奇によりt、の領域における波長ノ1.λ
λ and wavelength λ are separated. Depending on whether the natural number m in equations (2] to (6) is even or odd, the wavelength in the region t is 1.λ.
.

と波長λ、の偶数倍、奇数倍が入れ替わる。Even and odd multiples of the wavelength λ and wavelength λ are switched.

@1図ではmが偶数の場合を示しており、波長λ0.λ
、が奇数倍波長1波長λ5が偶数倍波長である。一方、
l 、t およびt、の領域で奇数倍の波1     
! 長として分波された2波長から成る3組λ、とλ6゜λ
、とλ7およびλ2と28は各々1. 、1.および1
7の領域において光導波路間距離および相互作用領域の
長さを適宜設定することにより容易に分波できる。
@1 Figure shows the case where m is an even number, and the wavelength λ0. λ
, is an odd number multiple wavelength and one wavelength λ5 is an even number multiple wavelength. on the other hand,
Odd times wave 1 in the region l, t and t
! Three sets λ consisting of two wavelengths separated as long wavelengths, and λ6゜λ
, and λ7 and λ2 and 28 are each 1. , 1. and 1
By appropriately setting the distance between the optical waveguides and the length of the interaction region in the region 7, demultiplexing can be easily performed.

また第1図の光導波路構成により逆の過惺で合波機能も
実現できる。第1図の光導波路構成はこのような機能を
有するから式(2)〜(6]の関係を満たす波長系列に
おいて(λ 、λ 、・・・・・、λ8)または(’2
 r ’B *・・・・・、λ、)の8波長に対す・る
光合分波器として応用できる。そして1段の相互作用領
域で奇数倍の波長として分波されるのは2波長以下であ
るから、第6図の6゛η成で問題となる奇数倍波長を分
波するための光合分波器のパラメータ設定が容易にでき
る。
Furthermore, the optical waveguide configuration shown in FIG. 1 also allows the multiplexing function to be realized by reverse polarization. The optical waveguide configuration shown in FIG.
It can be applied as an optical multiplexer/demultiplexer for eight wavelengths of r'B *..., λ,). Since the number of wavelengths that are separated as odd multiples in one stage of interaction region is less than two wavelengths, optical multiplexing and demultiplexing to separate odd multiples of wavelengths is a problem in the 6゛η configuration shown in Figure 6. Device parameters can be easily set.

第1図の光導波路構成は相互作用領域の長さが前段の長
さの半分になる相互作用領域を4段接続した8波長用の
Iil成であるが、このようなパターンで相互作用領域
をN段接続すれば、2N波長用の光合分波器を構成でき
る。この時の分波波長系列は次式の条件を満たす波長で
ある。
The optical waveguide configuration shown in Figure 1 is an 8-wavelength Iil configuration in which four stages of interaction regions are connected in which the length of the interaction region is half the length of the previous stage. By connecting N stages, an optical multiplexer/demultiplexer for 2N wavelengths can be constructed. The demultiplexed wavelength series at this time is a wavelength that satisfies the condition of the following equation.

第2図は本発明の第1の実施例を示す光合分波器の多段
接続構成図である。第2図中1は光合分波器、2は光フ
ァイバである。第2図の構成は第1図中のエバネセント
結合の生じる光導波路系として1組の光フアイバ対で構
成されるエバネセント結合を利用した光合分波器を用い
た構成であり、光合分波器1. (al SL (t)
l、1(C)、1 (d) % 1 (el、1(ト)
および1鴬)は各々第1図中の相互作用領域1111、
 、1. + 1. 、1. 、16および17に対応
している。本構成において各光合分波器単体におけるコ
ア径に対するコア中心間距離の比((i/a )および
相互作用領域の長さlを一例として表1に示す値とする
FIG. 2 is a diagram showing a multistage connection configuration of an optical multiplexer/demultiplexer showing a first embodiment of the present invention. In FIG. 2, 1 is an optical multiplexer/demultiplexer, and 2 is an optical fiber. The configuration shown in FIG. 2 uses an optical multiplexer/demultiplexer that utilizes evanescent coupling, which is composed of a pair of optical fibers as the optical waveguide system in which evanescent coupling occurs in FIG. 1. .. (al SL (t)
l, 1(C), 1 (d) % 1 (el, 1(g)
and 1) are interaction areas 1111 and 1111 in FIG. 1, respectively.
, 1. +1. , 1. , 16 and 17. In this configuration, the ratio of the distance between the core centers to the core diameter ((i/a)) and the length l of the interaction region in each optical multiplexer/demultiplexer are set to the values shown in Table 1 as an example.

表1  光合分波器64造パラメータ また光ファイバの諸元はコア径2a −No ’(μm
〕、屈折率n −1,46、比屈折率差Δ−0,2(%
〕1とする。
Table 1 Optical multiplexer/demultiplexer 64 construction parameters and optical fiber specifications are core diameter 2a - No' (μm
], refractive index n -1,46, relative refractive index difference Δ-0,2 (%
] 1.

この時、第2図中の光合分波器1 (aJに表2に示す
、8波長を入射させた場合、第2図に示す過巴で各波長
が分波され、各波長でのクロストークは表2に示すよう
にa OdB i度と表1のパラメータに対して算出さ
れる。
At this time, when the 8 wavelengths shown in Table 2 are input to the optical multiplexer/demultiplexer 1 (aJ in Fig. 2), each wavelength is demultiplexed by the wavelength shown in Fig. 2, and crosstalk at each wavelength occurs. is calculated for a OdB i degree and the parameters in Table 1 as shown in Table 2.

表2 分波波長およびクロストーク なお表2に示す波長系列は式(2)〜(6)においてm
−aの場合である。このように第2図の構成により8波
長用の光合分波器が実現できる。
Table 2 Demultiplexing wavelength and crosstalk The wavelength series shown in Table 2 is m in equations (2) to (6).
- This is the case of a. In this manner, an optical multiplexer/demultiplexer for eight wavelengths can be realized with the configuration shown in FIG.

第3図は本発明の第2の実施例を示す光合分波器の構成
図である。第3図中4は溝付き基板、5は細径ファイバ
、6は押え用基板である。第3図において溝付き基板令
は光ファイバのクラッドと同じ屈折率を有する材料基板
に溝を設けたものであり)細径ファイバ5は光ファイバ
を細く線引きt、fもツマたは光ファイバのクラッドを
一部除去したものである。溝付き基板4上に作製した溝
パターンに沿って細径ファイバ6を位置決めすることに
より、細径ファイバ6が「互いに隣接する領域ti(i
−1+21・・・、7)を構成し、光ファイバのクララ
に。
FIG. 3 is a configuration diagram of an optical multiplexer/demultiplexer showing a second embodiment of the present invention. In FIG. 3, 4 is a grooved substrate, 5 is a thin fiber, and 6 is a holding substrate. In Fig. 3, the grooved substrate is made by providing grooves in a material substrate having the same refractive index as the cladding of the optical fiber.) The small diameter fiber 5 is obtained by drawing an optical fiber into a thin line, t, f, and the like. This is with some of the cladding removed. By positioning the small diameter fibers 6 along the groove pattern prepared on the grooved substrate 4, the small diameter fibers 6 are arranged in "mutually adjacent regions ti(i
-1+21..., 7), and become the optical fiber Clara.

と同じ屈折率を有する材料の押え用基板6で固定する。It is fixed with a holding substrate 6 made of a material having the same refractive index as .

第3図はこのようにして第1図に示す光導波路構成を一
体化して構成したものであり、細径ファイバ5が2本隣
接して配置されている領域l工(1−112+・・・7
)においてエバネセント結合が生じる相互作用領域を構
成する。2本の細径ファイバ中の片方または両方に曲率
R等を設け2本の光導波路を遠ざけることにより、エバ
ネセント結合の生じる領域と生じない領域を接続してい
る。第3図はこのような構成なので第1図を用いて説明
した、ように8波長を合分波でき、8波長用光合分波器
が実現できる。
FIG. 3 shows an integrated optical waveguide configuration shown in FIG. 7
) constitutes an interaction region where evanescent coupling occurs. By providing a curvature R or the like on one or both of the two small-diameter fibers and separating the two optical waveguides, a region where evanescent coupling occurs and a region where it does not occur are connected. With such a configuration as shown in FIG. 3, eight wavelengths can be multiplexed and demultiplexed as explained using FIG. 1, and an optical multiplexer/demultiplexer for eight wavelengths can be realized.

第4因は本発明の第3の実施例を示す光合分波器の構成
図である。釘4図中1は光合分波器、4は溝付き基板、
5は細径ファイバ、6は押え用基板である。第4図は第
3図におけるエバネセント結合の生じる1、 、 1.
 、1.およびt7の各領域を除いて構成した光合分波
器である。溝付き基板4上に細径ファイバ5で構成され
た光導波路系により、第1図を用いて説明したように細
径ファイバ5の(〜端に入射するλ0.λ2.・・・・
・、λ8を2波長ずつ細径ファイバ5の各端に分波でき
、(bJ端にλ、とλ8 、(al端にλ8と22% 
(al端にλ2とλ8、(e〕端にλ1とλ6が分波さ
れる。また逆の過程で合波も行うことができる。ざらに
細径ファイバ6の(bl。
The fourth factor is a configuration diagram of an optical multiplexer/demultiplexer showing a third embodiment of the present invention. Nail 4 In the diagram, 1 is an optical multiplexer/demultiplexer, 4 is a grooved board,
5 is a small diameter fiber, and 6 is a holding substrate. FIG. 4 shows the evanescent couplings 1, , 1. in FIG. 3.
, 1. This is an optical multiplexer/demultiplexer configured except for the regions t7 and t7. As explained using FIG. 1, an optical waveguide system consisting of a small diameter fiber 5 on a grooved substrate 4 allows the λ0, λ2, . . .
・, λ8 can be split into two wavelengths at each end of the small diameter fiber 5, (λ and λ8 at the bJ end, and λ8 and 22% at the al end).
(λ2 and λ8 are demultiplexed at the (al end), and λ1 and λ6 are demultiplexed at the (e) end. Combining can also be performed in the reverse process.

(C1、(d)および(61の各端に光合分波器1を接
続することにより、波長λ、と八、λ、とλ7、λ2と
λ8、λ、とλ、が分波される。第、4.図の光合分波
器はこのように8波長を2波長゛ずつに分波できる。し
たがって、第4図に示すように波長λ0.λ2.λ3゜
、λ、と波長)6.λ6.λ2.λ8を上り下り逆方向
に用い、細径7アイt< 6 (7) (b) r (
cl r (dlおよび(e) ノ各端に光合分波器1
を接続して使用すれば、例えば1端末に上り下り2波長
を割り当てる波長多重方式における各端末への信号分配
器として応用できるO 第5図(aJ 、 (blは本発明の第4、第5の実施
例を示す光合分波器の斜視図である。第6図(al 、
 (b)中8は光導波路、7は誘電体基板である。第6
図(四。
By connecting the optical multiplexer/demultiplexer 1 to each end of (C1, (d) and (61), the wavelengths λ, 8, λ and λ7, λ2 and λ8, and λ and λ are demultiplexed. In this way, the optical multiplexer/demultiplexer shown in Figure 4 can separate eight wavelengths into two wavelengths each.Therefore, as shown in Figure 4, wavelengths λ0, λ2, λ3°, λ, and wavelengths)6. Using λ6, λ2, and λ8 in the up and down reverse directions, the narrow diameter 7 eye t< 6 (7) (b) r (
Optical multiplexer/demultiplexer 1 at each end of cl r (dl and (e)
If used by connecting, for example, it can be applied as a signal distributor to each terminal in a wavelength division multiplexing system that assigns two upstream and downstream wavelengths to one terminal. FIG. 6 is a perspective view of an optical multiplexer/demultiplexer showing an embodiment of
(b) 8 is an optical waveguide, and 7 is a dielectric substrate. 6th
Figure (4.

(b)中光導波路3は誘電体基板7の屈折率を一部高め
ることにより作製する。第5図(aJは第3図に示した
光合分波器の光導波路系を&8it体基板7上の光導波
路パターンとして作製するものであり、第3図を用いて
説明したように、8波長用光合分波器として応用できる
。また第5図(blは第4FgJに示した光合分波器の
光導波路系を誘電体基板〕上の光導波路パターンとして
作製するものであり、第4図を用いて説明したように、
例えば1端末に上り下り2波長を割り当てる波長多重方
式における各端末への信号分配器として応用できる。
(b) The medium optical waveguide 3 is manufactured by partially increasing the refractive index of the dielectric substrate 7. FIG. 5 (aJ is the one in which the optical waveguide system of the optical multiplexer/demultiplexer shown in FIG. It can be applied as an optical multiplexer/demultiplexer for use.Furthermore, it is fabricated as an optical waveguide pattern on a dielectric substrate (bl is the optical waveguide system of the optical multiplexer/demultiplexer shown in No. 4FgJ). As explained using
For example, it can be applied as a signal distributor to each terminal in a wavelength multiplexing system that assigns two upstream and downstream wavelengths to one terminal.

、(発明の効果) 以上説明したように、本発明による光合分波器はエバネ
セント結合を利用した光導波路系を多段接続する構成に
おいて各段の光導波路系において奇数倍の波長として分
波される波長を2波長以下にする構成であるから、従来
の構成において問題であった3、1波長以上の奇数倍の
波長をさらに分波するためのパラメータ設定の困難さが
解決できる利点がある。
(Effects of the Invention) As explained above, in the optical multiplexer/demultiplexer according to the present invention, in a configuration in which optical waveguide systems using evanescent coupling are connected in multiple stages, each stage of the optical waveguide system demultiplexes the wavelength as an odd number multiple. Since this is a configuration in which the number of wavelengths is reduced to two or less, there is an advantage that the difficulty in setting parameters for further demultiplexing wavelengths that are odd multiples of three or more than one wavelength, which was a problem in the conventional configuration, can be solved.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明による光合分波器の光導波路構成および
分波過喝の概念図、 第2図は本発明の第1の実施例を示す光合分波器の多段
接続構成図、 第3図は本発明の第2の実施例を示す光合分波器の構成
図、 第4図は本発明の第3の実施例を示す光合分波器の構成
図、 第5図(a)および(bJは本発明のそれぞれ第4およ
び第5の実施例を示す光合分波器の斜視図、第6図は従
来の購成による光合分波器の多段接続構成図である。 1 、1(al+ ]ibl+ C++ 1(d)+ 
He1r 1(f)+ 1@) ”・光合分波器2・・
・光ファイバ    3・・・光導波路4・・・溝付き
基板    5・・・細径ファイバ6・・・押え用基板
    7・・・誘電体基板λ□、λ、l、λ8.λ6
.λ5.ノ。、λ7.λ8.λ。・・・波長1、.1.
l、らl’41’517151/7・・・相互作用領域
。 特許出願人  日本電信電話公社 第1図 第2図 1(a)、1(bl、l((:)、l鴫1(e)、1(
f)、/<))−=l14H波82・・・・χブアイl
C 一つ 第5図 (a) (b) l(ラレン
1 is a conceptual diagram of the optical waveguide configuration and demultiplexing of the optical multiplexer/demultiplexer according to the present invention; FIG. 2 is a multistage connection configuration diagram of the optical multiplexer/demultiplexer showing the first embodiment of the present invention; The figure is a block diagram of an optical multiplexer/demultiplexer showing a second embodiment of the present invention, Figure 4 is a block diagram of an optical multiplexer/demultiplexer showing a third embodiment of the present invention, Figures 5(a) and ( bJ is a perspective view of an optical multiplexer/demultiplexer showing the fourth and fifth embodiments of the present invention, respectively, and FIG. 6 is a multistage connection configuration diagram of a conventional purchased optical multiplexer/demultiplexer. ]ibl+ C++ 1(d)+
He1r 1(f)+1@) ”・Optical multiplexer/demultiplexer 2・・
- Optical fiber 3... Optical waveguide 4... Grooved substrate 5... Small diameter fiber 6... Holding substrate 7... Dielectric substrate λ□, λ, l, λ8. λ6
.. λ5. of. , λ7. λ8. λ. ... Wavelength 1, . 1.
l, et al'41'517151/7...interaction region. Patent Applicant Nippon Telegraph and Telephone Public Corporation Figure 1 Figure 2
f), /<))-=l14H wave82...χ Buai l
C Figure 5 (a) (b) l (Laren

Claims (1)

【特許請求の範囲】 1、エバネセント結合が生じるように一定の距離で隣接
している2本の光導波路から成る系を直列に多段配置す
る構成であり、2本の光導波路の内1本は各段の系にわ
たり引き通してある構成であり、各段の系におけるエバ
ネセント結合の生じる相互作用領域の長さが前段の系に
おける相互作用領域の長さの半分であることを特徴とす
る光合分波器。 2、各段の系における引き通しでない方の光導波路の出
射側がエバネセント結合の生じる2本の光導波路から成
る系の一方の光導波路に接続されていることを特徴とす
る特許請求の範囲第1項記載の光合分波器。 3、エバネセント結合の生じる隣接した2本の光導波路
から成る系を光ファイバのコアを隣接させて構成するこ
とを特徴とする特許請求の範囲第1項または第2項記載
の光合分波器。 4、エバネセント結合の生じる隣接した2本の光導波路
から成る系として、クラッドを一部除去した2本の光フ
ァイバを用いてコアを隣接配置して構成する光合分波器
を用い、この光合分波器を多段接続して構成することを
特徴とする特許請求の範囲第1項または第2項記載の光
合分波器。 5、光ファイバのクラッドと同じ屈折率を有する基板上
に設けた溝にクラッドを一部除去した光ファイバを配置
することにより、1枚の基板上に一体化して構成するこ
とを特徴とする特許請求の範囲第3項記載の光合分波器
。 6、誘電体基板上に光導波路を作製して構成することを
特徴とする特許請求の範囲第1項または第2項記載の光
合分波器。
[Claims] 1. A system consisting of two optical waveguides adjacent to each other at a certain distance is arranged in multiple stages in series so that evanescent coupling occurs, and one of the two optical waveguides is A light combining system having a structure that extends through the system at each stage, and characterized in that the length of the interaction region where evanescent coupling occurs in the system at each stage is half the length of the interaction region in the system at the previous stage. Wave equipment. 2. Claim 1, characterized in that the output side of the optical waveguide that is not lead-through in the system at each stage is connected to one optical waveguide of a system consisting of two optical waveguides in which evanescent coupling occurs. Optical multiplexer/demultiplexer described in section. 3. An optical multiplexer/demultiplexer according to claim 1 or 2, characterized in that a system consisting of two adjacent optical waveguides in which evanescent coupling occurs is constructed by placing the cores of optical fibers adjacent to each other. 4. As a system consisting of two adjacent optical waveguides in which evanescent coupling occurs, an optical multiplexer/demultiplexer is used, which consists of two optical fibers with their cladding partially removed and their cores placed adjacent to each other. An optical multiplexer/demultiplexer according to claim 1 or 2, characterized in that the optical multiplexer/demultiplexer is constructed by connecting multiple wavers in multiple stages. 5. A patent characterized in that an optical fiber with a portion of the cladding removed is arranged in a groove provided on a substrate having the same refractive index as the cladding of the optical fiber, thereby being integrated onto a single substrate. An optical multiplexer/demultiplexer according to claim 3. 6. The optical multiplexer/demultiplexer according to claim 1 or 2, characterized in that it is constructed by fabricating an optical waveguide on a dielectric substrate.
JP17403684A 1984-08-23 1984-08-23 Optical multiplexer and demultiplexer Pending JPS6152604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17403684A JPS6152604A (en) 1984-08-23 1984-08-23 Optical multiplexer and demultiplexer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17403684A JPS6152604A (en) 1984-08-23 1984-08-23 Optical multiplexer and demultiplexer

Publications (1)

Publication Number Publication Date
JPS6152604A true JPS6152604A (en) 1986-03-15

Family

ID=15971503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17403684A Pending JPS6152604A (en) 1984-08-23 1984-08-23 Optical multiplexer and demultiplexer

Country Status (1)

Country Link
JP (1) JPS6152604A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6349708A (en) * 1986-08-20 1988-03-02 Hitachi Ltd Optical multiplexer and demultiplexer
JPS63155828A (en) * 1986-12-19 1988-06-29 Hitachi Ltd Optical multiplexer/demultiplexer and optical module therewith
JPH0314920U (en) * 1989-06-23 1991-02-14
JPH03132606A (en) * 1989-10-18 1991-06-06 Nippon Sheet Glass Co Ltd Broad wavelength region optical monitor device
US5652814A (en) * 1994-12-21 1997-07-29 E-Tek Dynamics, Inc. Integrable fiberoptic coupler and resulting devices and systems
GB2358067A (en) * 2000-01-07 2001-07-11 Bookham Technology Ltd Optical waveguide multiplexer/demultiplexer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6349708A (en) * 1986-08-20 1988-03-02 Hitachi Ltd Optical multiplexer and demultiplexer
JPS63155828A (en) * 1986-12-19 1988-06-29 Hitachi Ltd Optical multiplexer/demultiplexer and optical module therewith
JPH0314920U (en) * 1989-06-23 1991-02-14
JPH03132606A (en) * 1989-10-18 1991-06-06 Nippon Sheet Glass Co Ltd Broad wavelength region optical monitor device
US5652814A (en) * 1994-12-21 1997-07-29 E-Tek Dynamics, Inc. Integrable fiberoptic coupler and resulting devices and systems
GB2358067A (en) * 2000-01-07 2001-07-11 Bookham Technology Ltd Optical waveguide multiplexer/demultiplexer
US6522805B1 (en) 2000-01-07 2003-02-18 Bookham Technology Limited Optical multiplexer/demultiplexer

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