JP2003224541A - Multiple wavelength transmitting device - Google Patents
Multiple wavelength transmitting deviceInfo
- Publication number
- JP2003224541A JP2003224541A JP2002020838A JP2002020838A JP2003224541A JP 2003224541 A JP2003224541 A JP 2003224541A JP 2002020838 A JP2002020838 A JP 2002020838A JP 2002020838 A JP2002020838 A JP 2002020838A JP 2003224541 A JP2003224541 A JP 2003224541A
- Authority
- JP
- Japan
- Prior art keywords
- wavelength
- optical signal
- pseudo
- band
- multiplexing
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は波長多重伝送装置に
関し、特に複数の波長をｉ個（ｉは２以上の整数）の波
長帯域にグループ分けしてこれ等複数の波長帯域毎に帯
域分散補償を行って、その後波長帯域を多重化して伝送
出力する波長多重伝送装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wavelength division multiplexing transmission device, and more particularly to grouping a plurality of wavelengths into i (i is an integer of 2 or more) wavelength bands and compensating the band dispersion for each of the plurality of wavelength bands. The present invention relates to a wavelength division multiplex transmission device that performs the above-mentioned procedure and then multiplexes wavelength bands for transmission and output.
【０００２】[0002]
【従来の技術】従来のこの種の波長多重伝送装置の例を
図８に示すブロック図を参照しつつ説明する。図８にお
いて、外部より入力されたｊ個の異なる波長の光信号λ
1-1 〜λ1-j 群は波長多重部３−１へ入力されて、第１
の波長帯域の光信号に多重化される。また、外部より入
力されたｋ個の異なる波長の光信号λ2-1 〜λ2-k 群は
波長多重部３−２へ入力されて、第２の波長帯域の光信
号に多重化され、同様に、外部より入力されたｎ個の異
なる波長の光信号λi-1 〜λi-n 群は波長多重部３−ｉ
へ入力されて、第ｉの波長帯域の光信号に多重化され
る。2. Description of the Related Art An example of a conventional wavelength division multiplex transmission device of this type will be described with reference to a block diagram shown in FIG. In FIG. 8, j optical signals λ of different wavelengths input from the outside
The 1-1 to λ1-j groups are input to the wavelength multiplexing unit 3-1 and
Are multiplexed in the optical signal of the wavelength band. Further, the k optical signals λ2-1 to λ2-k of different wavelengths input from the outside are input to the wavelength multiplexing unit 3-2 and multiplexed into the optical signal of the second wavelength band. , The n optical signals λi-1 to λi-n of n different wavelengths input from the outside are wavelength multiplexing units 3-i.
And is multiplexed into the optical signal of the i-th wavelength band.
【０００３】なお、図９にこれ等第１から第ｉの波長帯
域と、それを構成する各波長との関係を示している。Incidentally, FIG. 9 shows the relationship between these first to i-th wavelength bands and the respective wavelengths constituting them.
【０００４】これ等波長多重部３−１〜３−ｉにて第１
から第ｉの波長帯域に変換された光多重信号は、帯域分
散補償部４−１〜４−ｉへそれぞれ入力されて波長帯域
毎に分散補償がなされる。分散補償後の各出力は帯域多
重部１０にて多重化されて、波長多重光信号として図示
せぬ光伝送路へ導出される。In these wavelength multiplexing units 3-1 to 3-i, the first
The optical multiplexed signal converted to the i-th wavelength band is input to each of the band-dispersion compensating units 4-1 to 4-i and dispersion-compensated for each wavelength band. The respective outputs after dispersion compensation are multiplexed by the band multiplexing unit 10 and guided to an optical transmission line (not shown) as a wavelength multiplexed optical signal.
【０００５】波長多重部３−１は、入力された光信号λ
1-1 〜λ1-j を予め分散補償する分散補償器３１１−１
〜３１１−ｊと、通常動作時には分散補償器３１１−１
からの光信号を選択し、分散補償器３１１−１からの光
信号が無くなった時には擬似光信号生成部２０より入力
された波長λ1-1 の擬似光信号を選択して出力するｐ
（ｐ：正の整数）波長おきに配置される光信号選択器３
１２−１と、分散補償器の挿入損失を補償し且つ装置出
力で各波長単位で出力パワ−を可変するための光増幅器
３１３−１〜３１３−ｊと、光増幅器３１３−１〜３１
３−ｊから入力されたｊ個の光信号を１つ光信号に波長
多重して出力する光合波器３１０とからなる。他の波長
多重部３−２〜３−ｉも波長多重部３−１と同一の構成
となっている。The wavelength multiplexer 3-1 receives the input optical signal λ
Dispersion compensator 311-1 for pre-dispersion compensating for 1-1 to λ1-j
˜311-j, and dispersion compensator 311-1 during normal operation
From the dispersion compensator 311-1 and the pseudo optical signal of wavelength λ1-1 input from the pseudo optical signal generator 20 is selected and output.
(P: positive integer) Optical signal selector 3 arranged at every wavelength
12-1, optical amplifiers 313-1 to 313-j for compensating the insertion loss of the dispersion compensator and varying the output power in units of wavelengths at the device output, and optical amplifiers 313-1 to 31-1.
An optical multiplexer 310 that wavelength-multiplexes j optical signals input from 3-j into one optical signal and outputs the optical signal. The other wavelength multiplexing units 3-2 to 3-i have the same configuration as the wavelength multiplexing unit 3-1.
【０００６】帯域分散補償部４−１は、波長多重部３−
１から出力された光信号に対して所定帯域の光信号のみ
を所定のレベルに増幅する光増幅器４２−１と、光増幅
器４２−１から出力された光信号を帯域分散補償する帯
域分散補償器４３−１と、帯域分散補償器４３−１の挿
入損失を補償するために所定帯域の光信号のみを所定の
レベルに増幅する光増幅器４４−１とを有している。他
の帯域分散補償部４−２〜４−ｉも同一構成である。The band dispersion compensator 4-1 includes a wavelength multiplexer 3-3.
1, an optical amplifier 42-1 that amplifies only an optical signal in a predetermined band with respect to the optical signal output from the optical signal 1 and a band dispersion compensator that performs band dispersion compensation on the optical signal output from the optical amplifier 42-1. 43-1 and an optical amplifier 44-1 that amplifies only an optical signal in a predetermined band to a predetermined level in order to compensate the insertion loss of the band dispersion compensator 43-1. The other band dispersion compensators 4-2 to 4-i have the same configuration.
【０００７】帯域多重部１０は、光結合器１３にてｉ個
の光信号を波長多重した時にＡＳＥ光（増幅された自然
放出光）による光ＳＮＲの劣化を防止するために、帯域
分散補償部４−１〜４−ｉからの光信号に対して所定の
帯域の光信号のみを通過させる光バンドパスフィルタ１
２−１〜１２−ｉと、光バンドパスフィルタ１２−１〜
１２−ｉから入力されたｉ個の光信号を合波する光合波
器１３と、光バンドパスフィルタ及び光合波器による挿
入損失を補償するために、図９の全波長帯域の光信号を
所定のレベルに増幅する光増幅器１４と、伝送路のゼロ
分散波長の分散を補償する１括分散補償器１５と、１括
分散補償器１５の挿入損失を補償し、且つ所定のレベル
に増幅する光増幅器１６とを有している。The band multiplexing unit 10 prevents the deterioration of the optical SNR due to the ASE light (amplified spontaneous emission light) when the i optical signals are wavelength-multiplexed by the optical coupler 13, in order to prevent the band dispersion compensating unit. An optical bandpass filter 1 that allows only optical signals in a predetermined band to pass with respect to the optical signals from 4-1 to 4-i
2-1 to 12-i and optical bandpass filter 12-1 to
In order to compensate the insertion loss due to the optical multiplexer 13 that combines the i optical signals input from 12-i and the optical bandpass filter and the optical multiplexer, the optical signals of all wavelength bands in FIG. Optical amplifier 14 that amplifies to a level of 0, a single dispersion compensator 15 that compensates for the dispersion of the zero dispersion wavelength of the transmission path, and an optical that compensates the insertion loss of the single dispersion compensator 15 and amplifies to a predetermined level And an amplifier 16.
【０００８】擬似光信号生成部２０は、図１０に示すよ
うに、第１の波長帯域（１）用としてｑ（ｑ：正の整
数）種類の擬似信号を作成して出力する擬似光信号発生
器２０１−１〜２０１−ｑからなる波長帯域１用擬似光
信号発生部２０−１と、同様に第２の波長帯域（２）用
としてｒ（ｒ：正の整数）種類の擬似信号を作成して出
力する波長帯域２用擬似光信号発生部２０−２と、同様
に第ｉの波長帯域ｉ用としてｓ（ｓ：正の整数）種類の
擬似信号を作成して出力する波長帯域ｉ用擬似光信号発
生部２０−ｉとからなる。As shown in FIG. 10, the pseudo optical signal generator 20 generates a pseudo optical signal for generating and outputting q (q: positive integer) types of pseudo signals for the first wavelength band (1). A pseudo optical signal generation unit 20-1 for the wavelength band 1 including the devices 201-1 to 201-q, and similarly generates r (r: positive integer) types of pseudo signals for the second wavelength band (2). And a wavelength band 2 pseudo optical signal generation unit 20-2 for outputting the wavelength band 2. Similarly, for the wavelength band i for generating and outputting s (s: positive integer) kinds of pseudo signals for the i-th wavelength band i. The pseudo optical signal generator 20-i.
【０００９】擬似光信号生成部２０から出力される擬似
光信号は、装置より出力されるトータルパワーレベルと
各波長あたりのパワ−レベルの変動を少なくするために
使用されるものであり、この擬似光信号は、波長多重部
内の光信号選択器を経由して挿入されるために、１例と
して、ｉ個に分割した波長帯域の内、波長帯域１のみが
使用される場合でも、他の波長帯域の波長多重部３−２
〜３−ｉ及び他の波長帯域の帯域分散補償部４−２〜４
−ｉも必要となる。The pseudo optical signal output from the pseudo optical signal generator 20 is used to reduce fluctuations in the total power level output from the device and the power level for each wavelength. Since the optical signal is inserted via the optical signal selector in the wavelength division multiplexer, as an example, even if only wavelength band 1 is used among the wavelength bands divided into i, other wavelengths are used. Band wavelength multiplexing unit 3-2
To 3-i and band dispersion compensators 4-2 to 4 for other wavelength bands
-I is also required.
【００１０】なお、光信号選択器３１２−１〜３ｉ２−
１などは図示せぬ制御回路による選択状態の制御がなさ
れるものとする。The optical signal selectors 312-1 to 3i2-
In 1 and the like, the selected state is controlled by a control circuit (not shown).
【００１１】[0011]
【発明が解決しようとする課題】従って、図８に示した
従来の波長多重伝送装置は、インサ−ビス状態での増設
は可能であるが、初期に使用される波長数が少ない場合
でも、全ブロックが必要となるので、初期導入価格が高
く、且つ全ブロックを設置するために広い床面積が必要
となるという欠点がある。Therefore, although the conventional wavelength division multiplex transmission apparatus shown in FIG. 8 can be expanded in the service state, even if the number of wavelengths initially used is small, Since the blocks are required, the initial introduction cost is high, and a large floor area is required to install all the blocks.
【００１２】本発明の目的は、初期に使用される波長数
が少ない場合に、初期導入価格を安価に抑え且つ装置の
設置床面積を少なくすることが可能で、将来インサービ
ス状態での増設が可能な波長多重伝送装置を提供するこ
とである。The object of the present invention is to reduce the initial introduction price and to reduce the installation floor area of the device when the number of wavelengths used in the initial stage is small, and it is possible to expand in-service in the future. It is to provide a possible wavelength division multiplexing transmission device.
【００１３】[0013]
【課題を解決するための手段】本発明による波長多重伝
送装置は、各々が複数の異なる波長の入力光信号群を１
つの波長帯域に多重する複数個の波長多重手段と、これ
等波長多重手段の各波長帯域出力を分散補償する複数個
の帯域分散補償手段と、これ等複数個の帯域分散補償手
段の各波長帯域出力を多重して送出する帯域多重手段と
を含む波長多重伝送装置であって、前記複数の波長帯域
の各々に対応して、これ等対応する波長帯域に含まれか
つ予め定められた１または複数種類の擬似波長信号と、
これ等擬似波長信号を多重した擬似多重信号とを生成す
る擬似光信号生成手段と、前記複数個の波長多重手段の
各入力部において、前記擬似光信号生成手段から生成さ
れた前記擬似波長信号とこれに対応する入力光信号とを
選択的に出力する光信号選択手段と、前記複数個の帯域
多重手段の各入部において、前記波長帯域出力の各々と
これに対応する前記擬似多重信号とを切替えて出力する
光信号切替手段とを含むことを特徴とする。A wavelength division multiplex transmission apparatus according to the present invention comprises a plurality of input optical signal groups each having a plurality of different wavelengths.
A plurality of wavelength multiplexing means for multiplexing in one wavelength band, a plurality of band dispersion compensating means for dispersion compensating each wavelength band output of these wavelength multiplexing means, and a respective wavelength band of these plurality of band dispersion compensating means A wavelength multiplexing transmission device including a band multiplexing means for multiplexing and transmitting outputs, wherein one or a plurality of predetermined wavelength bands corresponding to each of the plurality of wavelength bands are included in the corresponding wavelength bands. Types of pseudo-wavelength signals,
Pseudo optical signal generation means for generating a pseudo multiplexed signal in which these pseudo wavelength signals are multiplexed, and the pseudo wavelength signal generated from the pseudo optical signal generation means at each input section of the plurality of wavelength multiplexing means. Optical signal selecting means for selectively outputting an input optical signal corresponding thereto, and switching of each of the wavelength band outputs and the corresponding pseudo-multiplexed signal at each input of the plurality of band multiplexing means. And an optical signal switching means for outputting the output.
【００１４】そして、前記複数の波長帯域のうち不使用
の波長帯域が存在する場合、この不使用の波長帯域に対
応する前記光信号切替手段を前記擬似光信号生成手段か
らの擬似多重信号に切替え制御するようにしたことを特
徴とする。また、前記擬似波長信号に対応する前記入力
光信号がなくなった場合、このなくなった入力光信号に
対応する前記光信号選択手段を前記擬似波長信号に切替
えるようにしたことを特徴とする。また、前記複数個の
波長多重手段の各々は、前記入力光信号群の各波長信号
を分散補償する波長分散補償器を有しており、前記光信
号選択手段の各々は、前記波長分散補償器の出力段に設
けられていることを特徴とする。When an unused wavelength band exists among the plurality of wavelength bands, the optical signal switching means corresponding to the unused wavelength band is switched to the pseudo multiplex signal from the pseudo optical signal generation means. It is characterized in that it is controlled. Further, when the input optical signal corresponding to the pseudo wavelength signal is lost, the optical signal selecting means corresponding to the lost input optical signal is switched to the pseudo wavelength signal. Further, each of the plurality of wavelength multiplexing means has a chromatic dispersion compensator for dispersion compensating each wavelength signal of the input optical signal group, and each of the optical signal selecting means has the chromatic dispersion compensator. Is provided in the output stage of the.
【００１５】本発明による他の波長多重伝送装置は、各
々が複数の異なる波長の入力光信号群を１つの波長帯域
に多重する複数個の波長多重手段と、これ等波長多重手
段の各波長帯域出力を分散補償する複数個の帯域分散補
償手段と、これ等複数個の帯域分散補償手段の各波長帯
域出力を多重して送出する帯域多重手段とを含む波長多
重伝送装置であって、前記複数の波長帯域の各々に対応
して、これ等対応する波長帯域に含まれかつ予め定めら
れた１または複数種類の擬似波長信号を多重した擬似多
重信号を生成する擬似光信号生成手段と、前記帯域分散
補償手段の各入部において、前記擬似多重信号を挿入す
る擬似光信号挿入手段と、前記複数個の帯域多重手段の
各入部において、前記波長帯域出力の各々とこれに対応
する前記擬似多重信号とを切替えて出力する光信号切替
手段とを含むことを特徴とする。Another wavelength division multiplexing transmission apparatus according to the present invention is a plurality of wavelength division multiplexing means for respectively multiplexing a plurality of input optical signal groups of different wavelengths into one wavelength band, and each wavelength division band of these wavelength division multiplexing means. A wavelength division multiplex transmission apparatus comprising a plurality of band dispersion compensating means for dispersion compensating an output, and a band multiplexing means for multiplexing and transmitting respective wavelength band outputs of the plurality of band dispersion compensating means. Corresponding to each of the wavelength bands, the pseudo optical signal generating means for generating a pseudo-multiplexed signal in which one or a plurality of predetermined types of pseudo wavelength signals included in the corresponding wavelength bands are multiplexed, and the band. At each input of the dispersion compensating means, pseudo optical signal inserting means for inserting the pseudo multiplex signal, and at each input of the plurality of band multiplexing means, each of the wavelength band outputs and the pseudo multiplexing corresponding thereto Characterized in that it includes an optical signal switching means for outputting switching between items.
【００１６】そして、前記複数の波長帯域のうち不使用
の波長帯域が存在する場合、この不使用の波長帯域に対
応する前記光信号切替手段を前記擬似光信号生成手段か
らの擬似多重信号に切替え制御するようにしたことを特
徴とする。When there is an unused wavelength band among the plurality of wavelength bands, the optical signal switching means corresponding to the unused wavelength band is switched to the pseudo multiplex signal from the pseudo optical signal generating means. It is characterized in that it is controlled.
【００１７】本発明の作用を述べる。複数の波長光信号
をｉ個の波長帯域にグループ分けし、波長の使用順序と
して、先ずある波長帯域内の波長の光信号を全て使用
し、システムの発展に伴ってその次に別の波長帯域内の
光信号を使用するという様に、ｉ個の波長帯域を順次使
用していくように定義された波長多重伝送装置におい
て、使用される波長の数が変化しても、装置より出力さ
れるトータルパワーレベルと各波長あたりのパワーレベ
ルの変動を少くするために使用される擬似光信号の挿入
がなされる。この様な擬似光信号挿入方式の波長多重伝
送装置の導入に際して、初期時に使用される波長数が少
ない場合にも、ｉ個の（すなわち、全ての）波長帯域に
対応する波長多重部及び帯域分散補償部を設けて、装置
出力のトータルパワーレベルの変動をなくすことが必要
であったものを、ｉ個の波長帯域の光信号を全て多重す
る帯域多重部における各波長帯域の入力部において、擬
似光信号を挿入することにより、使用される波長帯域に
対応する波長多重部及び帯域分散補償部のみを設けるだ
けで良いことになる。The operation of the present invention will be described. Multiple wavelength optical signals are grouped into i wavelength bands, and the order of wavelength use is to first use all optical signals of wavelengths within a certain wavelength band, and then to another wavelength band as the system evolves. Even if the number of wavelengths used changes in a wavelength division multiplexing transmission device defined to sequentially use i wavelength bands, such as using optical signals in A pseudo optical signal used for reducing fluctuations in the total power level and the power level for each wavelength is inserted. Even when the number of wavelengths used at the initial stage is small when such a wavelength division multiplex transmission apparatus using the pseudo optical signal insertion method is introduced, the wavelength division multiplexer and the band dispersion corresponding to i (that is, all) wavelength bands are provided. It is necessary to eliminate the fluctuation of the total power level of the device output by providing a compensating unit, and to eliminate the fluctuation in the input unit of each wavelength band in the band multiplexing unit that multiplexes all the optical signals of i wavelength bands. By inserting the optical signal, only the wavelength multiplexing unit and the band dispersion compensating unit corresponding to the used wavelength band need be provided.
【００１８】従って、初期時に使用される波長数が少な
い場合に、初期導入価格が安価となり、かつ設置すべき
床面積が少くて済み、将来インサービス状態での波長数
の増加が可能となるものである。Therefore, when the number of wavelengths used in the initial stage is small, the initial introduction price is low, the floor area to be installed is small, and it is possible to increase the number of wavelengths in the in-service state in the future. Is.
【００１９】[0019]
【発明の実施の形態】以下に、本発明の実施例について
図面を参照しつつ説明する。図１は本発明の一実施例の
ブロック図であり、図８と同等部分は同一符号により示
している。図１において、従来例である図８のブロック
と相違する点のみについて説明する。本実施例では、帯
域多重部１０の各波長帯域の入力部（すなわち、帯域分
散補償部４−１〜４−ｉの各出力部）において、光信号
切替器１１−１〜１１−ｉを各波長帯域対応に設けてい
る。各光信号切替器１１−１〜１１−ｉは各帯域分散補
償部４−１〜４−ｉの出力と擬似光信号生成部２０から
生成される擬似波長信号とを択一的に切替えるものであ
る。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention, and the same portions as those in FIG. 8 are designated by the same reference numerals. In FIG. 1, only points different from the block of FIG. 8 which is a conventional example will be described. In the present embodiment, the optical signal switching units 11-1 to 11-i are respectively provided in the input units (that is, the output units of the band dispersion compensating units 4-1 to 4-i) of the wavelength bands of the band multiplexing unit 10. It is provided for the wavelength band. Each of the optical signal switchers 11-1 to 11-i selectively switches the output of each of the band dispersion compensators 4-1 to 4-i and the pseudo wavelength signal generated by the pseudo optical signal generator 20. is there.
【００２０】擬似光信号生成部２０の構成を図４に示し
ている。図４を参照すると、この擬似光信号生成部２０
は第１〜第ｉの波長帯域にそれぞれ対応した擬似光信号
生成ブロック２０−１〜２０−ｉを有している、第１の
波長帯域用としてのブロック２０−１は、ｑ種類の擬似
光信号を生成して出力する擬似光信号発生器２０１−１
〜２０１−ｑと、これら擬似光信号発生器２０１−１〜
２０１−ｑの出力をそれぞれ２分岐し、一つはそのまま
波長多重部３−１も光信号選択器へ出力し、他の一つは
光合波器２１３へ出力するｑ個の光カプラ２１１−１〜
２１１−ｑと、これらｑ個の光カプラから入力されたｑ
種類の擬似光信号を波長多重する光合波器２１３と、合
波された光信号を所定レベルに調整した後、帯域多重部
１０の光信号切替器１１−１に出力する光アンプ２１４
とを有している。The structure of the pseudo optical signal generator 20 is shown in FIG. Referring to FIG. 4, this pseudo optical signal generation unit 20
Has pseudo optical signal generation blocks 20-1 to 20-i respectively corresponding to the first to i-th wavelength bands. The block 20-1 for the first wavelength band is q kinds of pseudo-light. Pseudo optical signal generator 201-1 for generating and outputting signal
-201-q and these pseudo optical signal generators 201-1 to 201-1
Outputs of 201-q are respectively branched into two, one of which outputs the same as it is to the wavelength multiplexer 3-1 to the optical signal selector, and the other one of which outputs q optical couplers 211-1 to the optical multiplexer 213. ~
211-q and q input from these q optical couplers
An optical multiplexer 213 that wavelength-multiplexes different types of pseudo optical signals, and an optical amplifier 214 that outputs the multiplexed optical signal to the optical signal switch 11-1 of the band multiplexer 10 after adjusting the optical signal to a predetermined level.
And have.
【００２１】同様に、第２の波長帯域用としてのブロッ
ク２０−２は、ｒ種類の擬似光信号を生成して出力する
擬似光信号発生器２０２−１〜２０２−ｒと、これら擬
似光信号発生器２０２−１〜２０２−ｒの出力をそれぞ
れ２分岐し、一つはそのまま波長多重部３−２の光信号
選択器へ出力し、他の一つは光合波器２２３へ出力する
ｒ個の光カプラ２２１−１〜２２１−ｒと、これらｒ個
の光カプラから入力されたｒ種類の擬似光信号を波長多
重する光合波器２２３と、合波された光信号を所定レベ
ルに調整した後、帯域多重部１０の光信号部切替器１１
−２に出力する光アンプ２２４とを有している。Similarly, the block 20-2 for the second wavelength band includes pseudo optical signal generators 202-1 to 202-r which generate and output r kinds of pseudo optical signals, and these pseudo optical signals. Each of the outputs of the generators 202-1 to 202-r is branched into two, one is directly output to the optical signal selector of the wavelength multiplexer 3-2, and the other one is output to the optical multiplexer 223. Optical couplers 221-1 to 221-r, an optical multiplexer 223 for wavelength-multiplexing r kinds of pseudo optical signals input from these r optical couplers, and the multiplexed optical signals are adjusted to a predetermined level. After that, the optical signal switching unit 11 of the band multiplexing unit 10
And an optical amplifier 224 which outputs to the -2.
【００２２】同様に、第ｉの波長帯域用としてのブロッ
ク２０−ｉは、Ｓ種類の擬似光信号を生成して出力する
擬似光信号発生器２０ｉ−１〜２０ｉ−ｓと、これら擬
似光信号発生器２０ｉ−１〜２０ｉ−ｓの出力をそれぞ
れ２分岐し、一つはそのまま波長多重部３−ｉの光信号
選択器へ出力し、他の一つは光合波器２ｉ３へ出力する
ｓ個の光カプラ２ｉ１−１〜２ｉ１−ｓと、これらｓ個
の光カプラから入力されたｓ種類の擬似光信号を波長多
重する光合波器２ｉ３と、合波された光信号を所定レベ
ルに調整した後、帯域多重部１０の光信切替号器１１−
ｉに出力する光アンプ２ｉ４とを有している。Similarly, the block 20-i for the i-th wavelength band includes pseudo optical signal generators 20i-1 to 20i-s for generating and outputting S kinds of pseudo optical signals, and these pseudo optical signals. Outputs of the generators 20i-1 to 20i-s are respectively branched into two, one is directly output to the optical signal selector of the wavelength multiplexing unit 3-i, and the other one is output to the optical multiplexer 2i3. Optical couplers 2i1-1 to 2i1-s, an optical multiplexer 2i3 that wavelength-multiplexes s kinds of pseudo optical signals input from these s optical couplers, and the multiplexed optical signals are adjusted to a predetermined level. After that, the optical signal switching unit 11- of the band multiplexing unit 10-
and an optical amplifier 2i4 for outputting to i.
【００２３】なお、図２及び図３に、図１における光信
号切替器１１−１の２つの例を示しており、他の光信号
切替器１１−２〜１１−ｉについても同一構成とされ
る。図２の例は無瞬断切替えの２×１光スイッチを用い
たものであり、図３の例は２個の光減衰器ａ，ｂと光カ
プラｃとにより構成したものである。2 and 3 show two examples of the optical signal switch 11-1 in FIG. 1, and the other optical signal switches 11-2 to 11-i have the same configuration. It The example of FIG. 2 uses a 2 × 1 optical switch that does not switch without interruption, while the example of FIG. 3 includes two optical attenuators a and b and an optical coupler c.
【００２４】図３の例において、出力Ｃに、入力Ａから
の光信号に代えて入力Ｂからの光信号を導出する場合に
は、出力Ｃでの光パワーレベルが常に同一になる様に、
光減衰器ａの減推量を徐々に増大させ、同時に、光減衰
器ｂの減衰量を徐々に減らしていく。逆に、出力Ｃに、
入力Ｂからの光信号に代えて入力Ａからの光信号を導出
する場合には、出力Ｃでの光パワーレベルが常に同一に
なる様に、光減衰器ａの減衰量を徐々に減少させ、同時
に、光減衰器ｂの減衰量を徐々に増大させるように制御
する。In the example of FIG. 3, when the optical signal from the input B is derived from the input A instead of the optical signal from the input A, the optical power level at the output C is always the same.
The deduction amount of the optical attenuator a is gradually increased, and at the same time, the attenuation amount of the optical attenuator b is gradually decreased. Conversely, output C
When the optical signal from the input A is derived instead of the optical signal from the input B, the attenuation amount of the optical attenuator a is gradually decreased so that the optical power level at the output C is always the same. At the same time, the amount of attenuation of the optical attenuator b is controlled to be gradually increased.
【００２５】他の構成は、図８の従来例と同じであって
その説明は省略するものとする。なお、図１の分散補償
器、光増幅器、光合波器等の内部構成は当業者にとって
は良く知られており、また本発明とは直接関係しないの
で、その詳細な構成の説明は省略する。また、受信側の
装置についても、本発明とは直接関係しないので、その
説明も省略する。The other structure is the same as that of the conventional example shown in FIG. 8 and its explanation is omitted. The internal configurations of the dispersion compensator, the optical amplifier, the optical multiplexer, and the like shown in FIG. 1 are well known to those skilled in the art, and since they are not directly related to the present invention, detailed description thereof will be omitted. Also, the device on the receiving side is not directly related to the present invention, and therefore its description is omitted.
【００２６】上述した図１の構成において、例えばｉ個
にグループ分けした波長帯域のうち、第１の波長帯域の
みが使用される場合を説明すると、帯域多重部１０の光
信号切替器１１−１は帯域分散補償部４−１からの光信
号を選択し、それ以外の光信号切替器１１−２〜１１−
ｉは擬似光信号生成部２０からの擬似光信号（図４に示
した光合波器２１３による擬似多重信号）を選択する様
に、図示せぬ制御部により制御される。In the configuration of FIG. 1 described above, a case where only the first wavelength band is used, for example, of the wavelength bands divided into i groups will be described. The optical signal switch 11-1 of the band multiplexer 10 will be described. Selects the optical signal from the band dispersion compensator 4-1 and selects the other optical signal switchers 11-2 to 11-.
i is controlled by a control unit (not shown) so as to select the pseudo optical signal from the pseudo optical signal generation unit 20 (pseudo multiplexed signal by the optical multiplexer 213 shown in FIG. 4).
【００２７】第２〜第ｉの波長帯域については、波長多
重部３−２〜３−ｉと、帯域分散補償部４−２〜４−ｉ
とが不要となり、初期導入価格が安くなると共に、装置
の設置のための床面積も少くて済むことになる。システ
ムの拡張に伴って、第２の波長帯域が使用される場合に
は、波長多重部３−２と帯域分散補償部４−２のみを追
加し、帯域分散補償部４−２から出力される第２の波長
帯域の光信号レベルが所定レベルであることを確認後
に、帯域多重部１０内の光信号切替器１１−２を、擬似
光信号発生部２０からの擬似多重信号から帯域分散補償
部４−２からの光信号に切替える様制御する。こうする
ことにより、インサービス状態である第１の波長帯域に
は何等の影響を及ぼすことなく、波長増設が可能となる
のである。Regarding the second to i-th wavelength bands, the wavelength multiplexing units 3-2 to 3-i and the band dispersion compensating units 4-2 to 4-i are provided.
This eliminates the need for and, reduces the initial installation price, and requires less floor space for installing the device. When the second wavelength band is used due to the expansion of the system, only the wavelength multiplexing unit 3-2 and the band dispersion compensating unit 4-2 are added and output from the band dispersion compensating unit 4-2. After confirming that the optical signal level in the second wavelength band is at a predetermined level, the optical signal switch 11-2 in the band multiplexing unit 10 is switched from the pseudo multiplexed signal from the pseudo optical signal generating unit 20 to the band dispersion compensating unit. Control is performed so as to switch to the optical signal from 4-2. By doing so, it is possible to add wavelengths without any influence on the first wavelength band in the in-service state.
【００２８】図５は本発明の他の実施例のブロック図で
あり、波長多重方法として、直交偏波多重方法を用いた
場合の例である。この直交偏波多重方法を採用した場合
の波長多重部３−１について、図５を参照して説明す
る。FIG. 5 is a block diagram of another embodiment of the present invention, in which an orthogonal polarization multiplexing method is used as a wavelength multiplexing method. The wavelength multiplexing unit 3-1 when this orthogonal polarization multiplexing method is adopted will be described with reference to FIG.
【００２９】図５の例では、光信号選択器を１波長おき
の奇数波長番号に配置した例を示す。波長多重部３−１
は、奇数配列偏波多重部３０−１と偶数配列偏波多重部
３０−２と偏波直交合波器３０−３とから構成される。
奇数配列偏波多重部３０−１は複数の光信号選択器３１
２−１，３１２−３，……，３１２−（ｊ−１）と、複
数の光増幅器３１３−１，３１３−３，……，３１３−
（ｊ−１）と、偏波保持光合波器３０−１とから構成さ
れている。偶数配列偏波多重部３０−２は複数の光増幅
器３１３−２，３１３−４，……，３１３−ｊと、偏波
保持光合波器３１０−２とから構成されている。The example of FIG. 5 shows an example in which the optical signal selectors are arranged at odd wavelength numbers every other wavelength. Wavelength multiplexer 3-1
Is composed of an odd-numbered array polarization multiplexing unit 30-1, an even-numbered array polarization multiplexing unit 30-2, and a polarization orthogonal multiplexer 30-3.
The odd-numbered polarization multiplexer 30-1 includes a plurality of optical signal selectors 31.
2-1, 312-3, ..., 312- (j-1) and a plurality of optical amplifiers 313-1, 313-3 ,.
(J-1) and a polarization maintaining optical multiplexer 30-1. The even-numbered polarization multiplexer 30-2 is composed of a plurality of optical amplifiers 313-2, 313-4, ..., 313-j and a polarization maintaining optical multiplexer 310-2.
【００３０】奇数配列偏波多重部３０−１に外部から入
力される、奇数配列波長λ1-1，λ1-3，……，λ１-(j-
1)の光信号は、一定偏波方向に保持された状態で入力さ
れ、偏波保存光信号選択器３１２−１〜３１２−（ｊ−
１）及び偏波保存光増幅器３１３−１〜３１３−（ｊ−
１）を経由して偏波保持光合波器３１０−１で偏波保持
多重される。偶数配列偏波多重部３０−２に外部から入
力される偶数配列波長λ1-2，λ1-4，……，λ1-iの光
信号は、奇数配列波長の光信号の偏波と直交するように
保持された状態で入力され、偏波保存光増幅器３１３−
２〜３１３−ｊを経由して偏波保持光合波器３１０−２
で偏波保持多重される。Odd array wavelengths λ1-1, λ1-3, ..., λ1- (j-
The optical signal of 1) is input while being held in a constant polarization direction, and polarization-maintaining optical signal selectors 312-1 to 312- (j-
1) and polarization-maintaining optical amplifiers 313-1 to 313- (j-
The polarization-maintaining optical multiplexer 310-1 performs polarization-maintaining multiplexing via 1). The optical signals of the even array wavelengths λ1-2, λ1-4, ..., λ1-i externally input to the even array polarization multiplexer 30-2 are orthogonal to the polarization of the optical signal of the odd array wavelength. Input in the state of being held by the polarization maintaining optical amplifier 313-
2 to 313-j via the polarization maintaining optical multiplexer 310-2
Polarization-maintaining multiplex.
【００３１】偏波保持光合波器３１０−１から出力され
る奇数配列偏波多重部３０−１の多重光信号と、偏波保
持光合波器３１０−２から出力される偶数配列偏波多重
部３０−２の多重光信号とは、偏波直交合波器３０−３
で互いの偏波が直交保持されたまま合波される。The multiplexed optical signal output from the polarization maintaining optical multiplexer 310-1 by the odd-numbered polarization multiplexer 30-1 and the even-numbered polarization multiplexer output by the polarization-maintaining optical multiplexer 310-2. The multiplexed optical signal 30-2 is a polarization orthogonal multiplexer 30-3.
At, the polarized waves of each other are combined while being held orthogonally.
【００３２】図５の構成は、第１の波長帯域についての
波長多重部３−１のものであるが、第２〜第ｉの波長帯
域についても同様な構成が採用される。そして、これ等
各波長多重部の後段部分の構成については、図１の帯域
分散補償部及び帯域多重部と同一構成となる。The configuration of FIG. 5 is that of the wavelength multiplexer 3-1 for the first wavelength band, but the same configuration is adopted for the second to i-th wavelength bands. The configuration of the latter part of each wavelength multiplexing unit is the same as that of the band dispersion compensating unit and the band multiplexing unit of FIG.
【００３３】図６は本発明の更に他の実施例のブロック
図であり、図１と同等部分は同一符号により示してい
る。本実施例は、波長帯域が使用状態になったときの擬
似光信号の挿入を帯域分散補償部にて行う場合の例であ
る。図６において、図１と相違する部分についてのみ述
べる。図６においては、図１における波長多重部３−１
〜３−ｉに設けられていた光信号選択器３１２−１〜３
ｉ２−１を省いて、帯域分散補償部４−１〜４−ｉの入
力部分において、擬似光信号挿入器４１−２〜４１−ｉ
を追加したものである。FIG. 6 is a block diagram of still another embodiment of the present invention, and the same portions as those in FIG. 1 are designated by the same reference numerals. The present embodiment is an example of a case where the band dispersion compensating unit inserts a pseudo optical signal when the wavelength band is in use. In FIG. 6, only parts different from those in FIG. 1 will be described. 6, the wavelength multiplexing unit 3-1 in FIG.
To 3-i, the optical signal selectors 312-1 to 32-1
i2-1 is omitted, and the pseudo optical signal adders 41-2 to 41-i are provided at the input parts of the band dispersion compensators 4-1 to 4-i.
Is added.
【００３４】この場合の光増幅器４２−１〜４２−ｉの
各々は、波長多重部３−１〜３−ｉ内の光合波器と擬似
光信号挿入器との挿入損失を補償するために、所定帯域
の光信号のみを所定レベルに増幅するものである。Each of the optical amplifiers 42-1 to 42-i in this case compensates for the insertion loss between the optical multiplexer and the pseudo optical signal adder in the wavelength multiplexers 3-1 to 3-i. Only the optical signal in a predetermined band is amplified to a predetermined level.
【００３５】これら擬似光信号挿入器４１−２〜４１−
ｉの各々は、波長多重部３−１〜３−ｉの各出力である
波長帯域の光信号に対して、擬似光信号生成部２０から
の擬似光信号を挿入するものであり、ある波長帯域内で
のサービスに使用される波長の数が異なっても、光増幅
器４２−１〜４２−ｉへ入力される光信号レベルが一定
になる様に、擬似光信号を本来の光信号へ挿入するため
のものである。These pseudo optical signal adders 41-2 to 41-
Each i is for inserting the pseudo optical signal from the pseudo optical signal generation unit 20 into the optical signal of the wavelength band that is each output of the wavelength multiplexing units 3-1 to 3-i. Even if the number of wavelengths used for the internal service is different, the pseudo optical signal is inserted into the original optical signal so that the optical signal level input to the optical amplifiers 42-1 to 42-i becomes constant. It is for.
【００３６】図７は図６における擬似光信号生成部２０
の例を示す図であり、図４と同等部分は同一符号により
示している。図７において、図４と異なる部分につい
て、第１の波長帯域に対応するブロック２０−１につい
て述べる、擬似光信号発生器２０１−１〜２０１−ｑの
各光信号の光カプラ２１１−１〜２１１−ｑによる一方
の分岐出力の各々を、光アンプ２１５−１〜２１５−ｑ
により所定レベルに調整して、光合波器２１６にて合波
（多重）するようになっている。この光合波器２１６に
よる擬似多重信号が、図６の擬似信号挿入器４１−１で
の挿入信号となる。FIG. 7 shows the pseudo optical signal generator 20 shown in FIG.
5 is a diagram illustrating an example of FIG. 4, and the same portions as those in FIG. 4 are denoted by the same reference numerals. 7, a block 20-1 corresponding to the first wavelength band will be described with respect to a portion different from FIG. 4, and optical couplers 211-1 to 211-2 of the respective optical signals of the pseudo optical signal generators 201-1 to 201-q will be described. Each of the one branch output by -q is converted into an optical amplifier 215-1 to 215-q.
Is adjusted to a predetermined level, and multiplexed (multiplexed) by the optical multiplexer 216. The pseudo-multiplexed signal by the optical multiplexer 216 becomes the insertion signal in the pseudo signal adder 41-1 in FIG.
【００３７】他の構成については、図４のブロック２０
−１と同一である。また、他の波長帯域に対応するブロ
ック２０−２〜２０−ｉについても、上述したブロック
２０−１と同一の構成であるので、それらの説明は省略
するものとする。For other configurations, block 20 of FIG.
Same as -1. Further, the blocks 20-2 to 20-i corresponding to the other wavelength bands have the same configuration as the above-mentioned block 20-1, and therefore their description will be omitted.
【００３８】本実施例においても、帯域多重部１０の入
力部において、光信号切替器１１−１〜１１−ｉを設け
て、不使用波長帯域については、この光信号切替器によ
り擬似多重信号を供給するようにしているので、第１の
実施例と同等の効果があることは明らかである。Also in this embodiment, optical signal switches 11-1 to 11-i are provided in the input section of the band multiplexer 10, and for the unused wavelength band, a pseudo multiplex signal is generated by the optical signal switch. Since it is supplied, it is clear that it has the same effect as that of the first embodiment.
【００３９】[0039]
【発明の効果】以上述べた如く、本発明によれば複数の
波長帯域の光信号を全て多重する帯域多重部における各
波長帯域の入力部で、擬似光信号を挿入する様にしたの
で、使用される波長帯域に対応する波長多重部及び帯域
分散補償部のみを設けるだけで良いので、初期時に使用
される波長数が少ない場合に、初期導入価格が安価にな
ると共に、装置設置面積も小となるという効果がある。
また、将来インサービス状態での波長数の増加も容易と
なるという効果もある。As described above, according to the present invention, the pseudo optical signal is inserted at the input section of each wavelength band in the band multiplexing section for multiplexing all optical signals of a plurality of wavelength bands. Since it is sufficient to provide only the wavelength multiplexing unit and the band dispersion compensating unit corresponding to the wavelength band to be used, the initial introduction price is low and the device installation area is small when the number of wavelengths used at the initial stage is small. There is an effect that.
Further, there is also an effect that it is easy to increase the number of wavelengths in the in-service state in the future.
【図１】本発明の一実施例のブロック図である。FIG. 1 is a block diagram of an embodiment of the present invention.
【図２】図１の光信号切替器の一例を示す図である。2 is a diagram showing an example of the optical signal switch of FIG.
【図３】図１の光信号切替器の他の例を示す図である。FIG. 3 is a diagram showing another example of the optical signal switch of FIG.
【図４】図１の擬似光信号生成部の例を示す図である。FIG. 4 is a diagram illustrating an example of a pseudo optical signal generation unit in FIG.
【図５】本発明の他の実施例の一部ブロック図である。FIG. 5 is a partial block diagram of another embodiment of the present invention.
【図６】本発明の更に他の実施例の一部ブロック図であ
る。FIG. 6 is a partial block diagram of yet another embodiment of the present invention.
【図７】図６の擬似光信号生成部の例を示す図である。7 is a diagram illustrating an example of a pseudo optical signal generation unit in FIG.
【図８】従来例を説明するブロック図である。FIG. 8 is a block diagram illustrating a conventional example.
【図９】複数の波長をｉ個の波長帯域にグループ分けす
る場合の例を示す図である。FIG. 9 is a diagram showing an example in which a plurality of wavelengths are grouped into i wavelength bands.
【図１０】図８の擬似光信号生成部の例を示す図であ
る。10 is a diagram illustrating an example of a pseudo optical signal generation unit in FIG.
３−１〜３−ｉ 波長多重部
４−１〜４−ｉ 帯域分散補償部
１０ 帯域多重部
１１−１〜１１−ｉ 光信号切替器
１３，３１０，３２０，３ｉ０ 光合波器
２０ 擬似光信号生成
部
３１２−１，３２２−１，３ｉ２−１ 光信号選択器
４１−１，４１−２，４１−ｉ 擬似光信号挿入
器3-1 to 3-i Wavelength multiplexer 4-1 to 4-i Band dispersion compensator 10 Band multiplexer 11-1 to 11-i Optical signal switch 13, 310, 320, 3i0 Optical multiplexer 20 Pseudo optical signal Generation unit 312-1, 322-1, 3i2-1 Optical signal selector 41-1, 41-2, 41-i Pseudo optical signal inserter
───────────────────────────────────────────────────── フロントページの続き (72)発明者 南條 行則 宮城県黒川郡大和町吉岡字雷神２番地 宮 城日本電気株式会社内 Ｆターム(参考） 5K002 AA01 BA02 BA05 BA06 CA01 DA02 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Yukinori Nanjo Miyagi Prefecture Kurokawa-gun Yamato-cho Yoshioka character Raijin 2 shrine Inside NEC Corporation F-term (reference) 5K002 AA01 BA02 BA05 BA06 CA01 DA02
Claims (6)
を１つの波長帯域に多重する複数個の波長多重手段と、 これ等波長多重手段の各波長帯域出力を分散補償する複
数個の帯域分散補償手段と、 これ等複数個の帯域分散補償手段の各波長帯域出力を多
重して送出する帯域多重手段とを含む波長多重伝送装置
であって、 前記複数の波長帯域の各々に対応して、これ等対応する
波長帯域に含まれかつ予め定められた１または複数種類
の擬似波長信号と、これ等擬似波長信号を多重した擬似
多重信号とを生成する擬似光信号生成手段と、 前記複数個の波長多重手段の各入力部において、前記擬
似光信号生成手段から生成された前記擬似波長信号とこ
れに対応する入力光信号とを選択的に出力する光信号選
択手段と、 前記複数個の帯域多重手段の各入部において、前記波長
帯域出力の各々とこれに対応する前記擬似多重信号とを
切替えて出力する光信号切替手段と、を含むことを特徴
とする波長多重伝送装置。1. A plurality of wavelength multiplexing means for respectively multiplexing a plurality of input optical signal groups having different wavelengths into one wavelength band, and a plurality of bands for dispersion compensation of respective wavelength band outputs of these wavelength multiplexing means. A wavelength multiplex transmission device comprising a dispersion compensating means and a band multiplexing means for multiplexing and outputting the respective wavelength band outputs of a plurality of band dispersion compensating means, each of which corresponds to each of the plurality of wavelength bands. A pseudo optical signal generating means for generating one or a plurality of predetermined pseudo wavelength signals included in the corresponding wavelength bands and a pseudo multiplex signal in which these pseudo wavelength signals are multiplexed; In each of the input parts of the wavelength multiplexing means, optical signal selection means for selectively outputting the pseudo wavelength signal generated from the pseudo optical signal generation means and the input optical signal corresponding thereto, and the plurality of bands Of multiple means In join the club, a wavelength multiplex transmission apparatus characterized by comprising, an optical signal switching means for outputting the switching between the pseudo-multiplexed signal corresponding thereto and each of the wavelength bands output.
帯域が存在する場合、この不使用の波長帯域に対応する
前記光信号切替手段を前記擬似光信号生成手段からの擬
似多重信号に切替え制御するようにしたことを特徴とす
る請求項１記載の波長多重伝送装置。2. When an unused wavelength band exists among the plurality of wavelength bands, the optical signal switching means corresponding to the unused wavelength band is switched to a pseudo multiplex signal from the pseudo optical signal generation means. The wavelength multiplexing transmission device according to claim 1, wherein the wavelength multiplexing transmission device is controlled.
信号がなくなった場合、このなくなった入力光信号に対
応する前記光信号選択手段を前記擬似波長信号に切替え
るようにしたことを特徴とする請求項１または２記載の
波長多重伝送装置。3. When the input optical signal corresponding to the pseudo wavelength signal is lost, the optical signal selecting means corresponding to the lost input optical signal is switched to the pseudo wavelength signal. The wavelength division multiplexing transmission apparatus according to claim 1.
記入力光信号群の各波長信号を分散補償する波長分散補
償器を有しており、前記光信号選択手段の各々は、前記
波長分散補償器の出力段に設けられていることを特徴と
する請求項１〜３いずれか記載の波長多重伝送装置。4. Each of the plurality of wavelength multiplexing means has a chromatic dispersion compensator for dispersion compensating each wavelength signal of the input optical signal group, and each of the optical signal selecting means has the wavelength The wavelength division multiplex transmission device according to any one of claims 1 to 3, which is provided at an output stage of the dispersion compensator.
を１つの波長帯域に多重する複数個の波長多重手段と、 これ等波長多重手段の各波長帯域出力を分散補償する複
数個の帯域分散補償手段と、 これ等複数個の帯域分散補償手段の各波長帯域出力を多
重して送出する帯域多重手段とを含む波長多重伝送装置
であって、 前記複数の波長帯域の各々に対応して、これ等対応する
波長帯域に含まれかつ予め定められた１または複数種類
の擬似波長信号を多重した擬似多重信号を生成する擬似
光信号生成手段と、 前記帯域分散補償手段の各入部において、前記擬似多重
信号を挿入する擬似光信号挿入手段と、 前記複数個の帯域多重手段の各入部において、前記波長
帯域出力の各々とこれに対応する前記擬似多重信号とを
切替えて出力する光信号切替手段と、を含むことを特徴
とする波長多重伝送装置。5. A plurality of wavelength multiplexing means for respectively multiplexing a plurality of input optical signal groups of different wavelengths into one wavelength band, and a plurality of bands for dispersion compensation of respective wavelength band outputs of these wavelength multiplexing means. A wavelength multiplex transmission device comprising a dispersion compensating means and a band multiplexing means for multiplexing and outputting the respective wavelength band outputs of a plurality of band dispersion compensating means, each of which corresponds to each of the plurality of wavelength bands. , A pseudo optical signal generation unit that generates a pseudo multiplexed signal that is a multiplex of one or more kinds of predetermined pseudo wavelength signals included in the corresponding wavelength band, and each of the input sections of the band dispersion compensation unit, Pseudo-optical signal inserting means for inserting a pseudo-multiplexed signal, and an optical signal switch for switching and outputting each of the wavelength band outputs and the corresponding pseudo-multiplexed signal at each input of the plurality of band multiplexing means. Wavelength multiplexing transmission apparatus, characterized in that it comprises a means.
帯域が存在する場合、この不使用の波長帯域に対応する
前記光信号切替手段を前記擬似光信号生成手段からの擬
似多重信号に切替え制御するようにしたことを特徴とす
る請求項５記載の波長多重伝送装置。6. When an unused wavelength band exists among the plurality of wavelength bands, the optical signal switching means corresponding to the unused wavelength band is switched to a pseudo multiplex signal from the pseudo optical signal generation means. 6. The wavelength division multiplexing transmission device according to claim 5, wherein the wavelength division multiplexing transmission device is controlled.
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|---|---|---|---|
| JP2002020838A JP3926162B2 (en) | 2002-01-30 | 2002-01-30 | Wavelength multiplex transmission equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002020838A JP3926162B2 (en) | 2002-01-30 | 2002-01-30 | Wavelength multiplex transmission equipment |
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| Publication Number | Publication Date |
|---|---|
| JP2003224541A true JP2003224541A (en) | 2003-08-08 |
| JP3926162B2 JP3926162B2 (en) | 2007-06-06 |
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|---|---|---|---|
| JP2002020838A Expired - Fee Related JP3926162B2 (en) | 2002-01-30 | 2002-01-30 | Wavelength multiplex transmission equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006005639A (en) * | 2004-06-17 | 2006-01-05 | Nec Corp | System and method for wavelength multiplexing transmission and optical transmitter |
| JP2006014055A (en) * | 2004-06-28 | 2006-01-12 | Nec Corp | Multiple wavelength transmitting device and its wavelength additional method |
| JP2010273033A (en) * | 2009-05-20 | 2010-12-02 | Mitsubishi Electric Corp | Optical transmitting apparatus, apparatus for expanding number of light wavelengths, and method for expanding number of light wavelengths |
-
2002
- 2002-01-30 JP JP2002020838A patent/JP3926162B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006005639A (en) * | 2004-06-17 | 2006-01-05 | Nec Corp | System and method for wavelength multiplexing transmission and optical transmitter |
| JP4590944B2 (en) * | 2004-06-17 | 2010-12-01 | 日本電気株式会社 | Wavelength multiplex transmission system, optical transmitter, and wavelength multiplex transmission method |
| JP2006014055A (en) * | 2004-06-28 | 2006-01-12 | Nec Corp | Multiple wavelength transmitting device and its wavelength additional method |
| JP4517747B2 (en) * | 2004-06-28 | 2010-08-04 | 日本電気株式会社 | Wavelength multiplexing transmission apparatus and wavelength extension method thereof |
| JP2010273033A (en) * | 2009-05-20 | 2010-12-02 | Mitsubishi Electric Corp | Optical transmitting apparatus, apparatus for expanding number of light wavelengths, and method for expanding number of light wavelengths |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3926162B2 (en) | 2007-06-06 |
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