JPH06276160A - Wavelength dispersion compensating equipment - Google Patents
Wavelength dispersion compensating equipmentInfo
- Publication number
- JPH06276160A JPH06276160A JP5060233A JP6023393A JPH06276160A JP H06276160 A JPH06276160 A JP H06276160A JP 5060233 A JP5060233 A JP 5060233A JP 6023393 A JP6023393 A JP 6023393A JP H06276160 A JPH06276160 A JP H06276160A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- polarization
- chromatic dispersion
- dispersion compensating
- terminal
- 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]
【産業上の利用分野】この発明は、伝送用光ファイバの
波長分散をキャンセルする波長分散補償器に関し、特
に、伝送用光ファイバの波長分散と逆の極性を有する波
長分散補償光ファイバを用いた波長分散補償器に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chromatic dispersion compensator for canceling chromatic dispersion of a transmission optical fiber, and more particularly to a chromatic dispersion compensating optical fiber having a polarity opposite to that of the transmission optical fiber. The present invention relates to a chromatic dispersion compensator.
【０００２】[0002]
【従来の技術】従来から、１．３μｍ帯のシングルモー
ド光ファイバを用いた１．５５μｍ帯域光伝送が広く行
なわれているが、伝送する光信号のビットレートを高く
したり、伝送距離を長くした場合、光ファイバの波長分
散により伝送される光信号に歪が発生するため、光伝送
に限界が生じていた。2. Description of the Related Art Conventionally, 1.55 μm band optical transmission using a 1.3 μm band single mode optical fiber has been widely performed. However, the bit rate of an optical signal to be transmitted is increased and the transmission distance is increased. In such a case, distortion occurs in the transmitted optical signal due to the wavelength dispersion of the optical fiber, which causes a limit to the optical transmission.
【０００３】このような問題を解決するため、例えばE.
F.Murphy,etc"All-Optical,Fiber-Based 1550 nm Dispe
rsion Experiment over 1310nm Optimized Fiber",OFC'
92 Paper PD-14に示されるように、伝送用光ファイバの
波長分散と逆の極性（正又は負）の波長分散をもった光
ファイバ（以下、波長分散補償光ファイバという）を用
いて、上記伝送用光ファイバの波長分散をキャンセルす
る方法が有力な手段である。In order to solve such a problem, for example, E.
F. Murphy, etc "All-Optical, Fiber-Based 1550 nm Dispe
rsion Experiment over 1310nm Optimized Fiber ", OFC '
As shown in 92 Paper PD-14, using an optical fiber (hereinafter referred to as “chromatic dispersion compensating optical fiber”) having a chromatic dispersion having a polarity (positive or negative) opposite to that of the transmission optical fiber, The method of canceling the chromatic dispersion of the transmission optical fiber is a powerful means.
【０００４】この引例に示された従来例によると、１５
０ｋｍの伝送用光ファイバ（１．３μｍ帯のシングルモ
ード光ファイバ）の１．５５μｍ帯域における波長分散
（約２５００ｐｓ／ｎｍ）を補償するため、１ｋｍ当り
−６５ｐｓ／ｎｍ（負の波長分散）の波長分散をもつ波
長分散補償光ファイバを合計３９．４ｋｍ使用してい
る。According to the conventional example shown in this reference, 15
Wavelength of -65 ps / nm (negative wavelength dispersion) per 1 km to compensate for wavelength dispersion (about 2500 ps / nm) in the 1.55 μm band of 0 km transmission optical fiber (1.3 μm band single mode optical fiber) A total of 39.4 km of chromatic dispersion compensating optical fiber with dispersion is used.
【０００５】[0005]
【発明が解決しようとする課題】従来の波長分散補償器
は以上のように、伝送用光ファイバの波長分散を補償す
るため、逆の極性（正又は負）の波長分散を有する数１
０ｋｍ程度の波長分散補償光ファイバを必要とするの
で、光伝送用の装置内の限られたスペースに収納するの
が難しいという課題があった。As described above, the conventional chromatic dispersion compensator compensates for the chromatic dispersion of the transmission optical fiber, and therefore has the opposite polarity (positive or negative) chromatic dispersion.
Since a chromatic dispersion compensating optical fiber of about 0 km is required, there is a problem that it is difficult to store the optical fiber in a limited space in the device for optical transmission.
【０００６】この発明は上記のような課題を解決するた
めになされたもので、高性能でかつ収納性（小型化）に
優れた波長分散補償器を提供することを特徴としてい
る。The present invention has been made to solve the above problems, and is characterized by providing a chromatic dispersion compensator having high performance and excellent storability (miniaturization).
【０００７】[0007]
【課題を解決するための手段】この発明に係る波長分散
補償器は、当該波長分散補償器を構成する波長分散補償
光ファイバ中を、伝送される光が２度伝搬するように構
成したことを特徴としている。The chromatic dispersion compensator according to the present invention is configured such that the transmitted light propagates twice in the chromatic dispersion compensating optical fiber constituting the chromatic dispersion compensator. It has a feature.
【０００８】特に、請求項１に係る波長分散補償器は、
伝送用光ファイバの波長分散と逆の極性の波長分散を有
する波長分散補償光ファイバの一端を、外部との入出力
手段として少なくとも３端子を有する光サーキュレータ
と結合させるとともに、他端を全反射終端させたことを
特徴としている。なお、ここにいう全反射終端は、必ず
しも反射率１００％を意味するものではない。Particularly, the chromatic dispersion compensator according to claim 1 is
One end of a chromatic dispersion compensating optical fiber having a chromatic dispersion having a polarity opposite to that of the transmission optical fiber is coupled to an optical circulator having at least three terminals as an input / output means with the outside, and the other end is a total reflection termination. It is characterized by having done. The term “total reflection termination” does not necessarily mean 100% reflectance.
【０００９】また、請求項２に係る波長分散補償器は、
上記波長分散補償光ファイバとして偏波面保存型の波長
分散補償光ファイバを用いたものであり、この波長分散
補償光ファイバの両端を第１及び第２の偏波合成器と結
合させている。そして、第２の偏波合成器における一方
の偏波面と、この偏波面とは異なる偏波モードを有する
他方の偏波面とを、偏波面保存光ファイバを用いてルー
プ状に結合させたことを特徴としている。The chromatic dispersion compensator according to claim 2 is
A polarization plane preserving type chromatic dispersion compensating optical fiber is used as the chromatic dispersion compensating optical fiber, and both ends of the chromatic dispersion compensating optical fiber are coupled to the first and second polarization combiners. Then, one polarization plane in the second polarization combiner and the other polarization plane having a polarization mode different from this polarization plane are coupled in a loop using a polarization-maintaining optical fiber. It has a feature.
【００１０】なお、当該波長分散補償器に入力される信
号光は直線偏波であることが前提となるため、上記請求
項２に係る波長分散補償器において外部との入出力手段
となる第１の偏波合成器と入力端との間に、偏波面保存
光ファイバを設けるか、あるいは任意の偏波状態を直線
偏波に変換する偏波制御器を設けている。Since it is premised that the signal light input to the chromatic dispersion compensator is linearly polarized light, the chromatic dispersion compensator according to claim 2 serves as an external input / output unit. Between the polarization combiner and the input end, a polarization-maintaining optical fiber is provided, or a polarization controller that converts an arbitrary polarization state into a linear polarization is provided.
【００１１】[0011]
【作用】請求項１に係る波長分散補償器は、波長分散補
償光ファイバの一端を、入射方向と出射方向を変えるた
めに３端子の光サーキュレータと結合させるとともに、
他端を全反射終端させることにより、上記波長分散補償
光ファイバに入射された信号光を再度逆方向に伝搬させ
る。In the chromatic dispersion compensator according to the first aspect of the present invention, one end of the chromatic dispersion compensating optical fiber is coupled with an optical circulator having three terminals to change the incident direction and the outgoing direction.
By terminating the other end with total reflection, the signal light incident on the wavelength dispersion compensation optical fiber is propagated in the opposite direction again.
【００１２】また、偏波状態が直線偏波状態であること
を前提とした請求項２に係る波長分散補償器は、偏波保
存型の波長分散補償光ファイバの両端を偏波合成器と結
合させ、その一方の偏波合成器における異なる偏波面同
志を偏波面保存光ファイバによりループ状に結合するよ
うに構成したので、上記偏波保存型の波長分散補償光フ
ァイバに入射された信号光を再度逆方向に伝搬させる。The chromatic dispersion compensator according to claim 2, which is premised on the fact that the polarization state is a linear polarization state, connects both ends of a polarization-maintaining chromatic dispersion compensating optical fiber to a polarization combiner. Since the different polarization planes in one of the polarization combiners are coupled in a loop by the polarization-maintaining optical fiber, the signal light incident on the polarization-maintaining chromatic dispersion compensating optical fiber is Propagate in the opposite direction again.
【００１３】さらに、上記請求項１および２に係る波長
分散補償器は、以上のように波長分散補償光ファイバ内
において信号光を２度伝搬させているので、波長分散機
能を十分に保持したまま収納性（小型化）の向上を可能
にする。Further, since the chromatic dispersion compensator according to claims 1 and 2 propagates the signal light twice in the chromatic dispersion compensating optical fiber as described above, the chromatic dispersion function is sufficiently maintained. Allows for improved storability (miniaturization).
【００１４】[0014]
【実施例】以下、この発明の一実施例を図１及び図２を
用いて説明する。なお、図中同一部分には同一符号を付
して説明を省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. In the figure, the same parts are designated by the same reference numerals and the description thereof is omitted.
【００１５】図１は、請求項１に係る波長分散補償器の
構成を示す図であり、この図において、波長分散補償光
ファイバ２の一端は、外部との入出力手段として３端子
を有する光サーキュレータ１における第２の端子と結合
され、他端は全反射終端構造３にすることにより構成さ
れている。FIG. 1 is a diagram showing a configuration of a chromatic dispersion compensator according to a first aspect of the present invention. In this figure, one end of a chromatic dispersion compensating optical fiber 2 is an optical device having three terminals as an input / output unit with the outside. The circulator 1 is connected to the second terminal, and the other end of the circulator 1 has a total reflection termination structure 3.
【００１６】ここで、上記波長分散補償光ファイバ２
は、比屈折率差（コア部とクラッド部の屈折率差）２．
０％、コア径２．５μｍ、カットオフ波長０．８μｍ
で、波長分散は１ｋｍ当たり−６４ｐｓ／ｎｍのものを
用い、全反射終端させる構造３は、上記波長分散補償光
ファイバ２の他端に金（Ａｕ）を蒸着させることで、反
射率約９０％の全反射終端構造を実現している。なお、
明細書中でいう全反射終端は、必ずしも反射率１００％
を意味するものではない。Here, the chromatic dispersion compensating optical fiber 2 is used.
Is the relative refractive index difference (refractive index difference between the core and the clad).
0%, core diameter 2.5 μm, cutoff wavelength 0.8 μm
The wavelength dispersion used is -64 ps / nm per 1 km, and the structure 3 for terminating the total reflection is formed by evaporating gold (Au) on the other end of the wavelength dispersion compensation optical fiber 2 to obtain a reflectance of about 90%. The total reflection termination structure of is realized. In addition,
The total reflection termination referred to in the specification does not necessarily mean a reflectance of 100%.
Does not mean.
【００１７】また、上記光サーキュレータ１は、光送信
器あるいは伝送用光ファイバから送信された光信号を入
力する第１の端子１ａと、この第１の端子１ａから入力
された光信号を出力し、上記全反射終端構造３により反
射された光信号を再度入力する第２の端子１ｂと、この
第２の端子１ｂにに入力された光信号を出力する第３の
端子１ｃを有し、外部との入出力手段として機能する。The optical circulator 1 outputs a first terminal 1a for inputting an optical signal transmitted from an optical transmitter or an optical fiber for transmission, and an optical signal input from the first terminal 1a. , A second terminal 1b for re-inputting the optical signal reflected by the total reflection termination structure 3 and a third terminal 1c for outputting the optical signal input to the second terminal 1b, And functions as an input / output means.
【００１８】この請求項１の発明によると、まず、伝送
されてきた信号光は、光サーキュレータ１の第１の端子
１ａから入力され、第２の端子１ｂから波長分散補償光
ファイバ２の一端へ出力される。そして、この波長分散
補償光ファイバ２を伝搬した信号光は他端の全反射終端
構造３により反射され、再度この波長分散補償光ファイ
バ２を逆方向に伝搬して第２の端子１ｂに入力され、最
終的に上記光サーキュレータ１の第３の端子１ｃから出
力されることで、同一ファイバ中での信号光の２度伝搬
（逆方向）を可能にしている。According to the invention of claim 1, first, the transmitted signal light is input from the first terminal 1a of the optical circulator 1 and from the second terminal 1b to one end of the chromatic dispersion compensating optical fiber 2. Is output. The signal light propagating through the wavelength dispersion compensation optical fiber 2 is reflected by the total reflection termination structure 3 at the other end, propagates through the wavelength dispersion compensation optical fiber 2 in the opposite direction again, and is input to the second terminal 1b. Finally, by being output from the third terminal 1c of the optical circulator 1, the signal light can be propagated twice (in the opposite direction) in the same fiber.
【００１９】次に、図２は請求項２に係る波長分散補償
器の構成を示す図であり、入力される信号光が直線偏波
状態であることを前提として構成したものである。Next, FIG. 2 is a diagram showing a configuration of a chromatic dispersion compensator according to a second aspect of the present invention, which is configured on the assumption that the input signal light is in a linearly polarized state.
【００２０】すなわち、偏波面を保持する機能を有する
偏波面保存型の波長分散補償光ファイバ５の両端に、第
１及び第２の偏波合成器４ａ、４ｂを結合させ、この第
２の偏波合成器４ｂにおける一方の偏波面と、この偏波
面と異なる偏波モードを有する他方の偏波面とを偏波面
保存光ファイバ５ｂをループ状にして結合させること
で、上記偏波面保存型の波長分散補償光ファイバ５を伝
搬してきた信号光の偏波面と直交する偏波状態で逆方向
に伝搬させるように構成している。That is, the first and second polarization combiners 4a and 4b are coupled to both ends of the polarization-maintaining chromatic dispersion compensating optical fiber 5 having the function of maintaining the polarization plane, and the second polarization is combined. The one polarization plane in the wave combiner 4b and the other polarization plane having a polarization mode different from this polarization plane are coupled by forming a polarization plane maintenance optical fiber 5b in a loop shape, and thus the polarization plane maintenance wavelength is obtained. The signal light propagated through the dispersion compensating optical fiber 5 is configured to propagate in the opposite direction in a polarization state orthogonal to the polarization plane.
【００２１】上記第１及び第２の偏波合成器４ａ、４ｂ
としては、偏波プリズムを使用するバルク型を用いるこ
ととし、偏波面保存型の波長分散補償光ファイバ５とし
ては、上述した波長分散補償光ファイバ２と同様のコア
構造を有し、クラッド部に応力付与部を持つＰＡＮＤＡ
型光ファイバを用いる。The first and second polarization combiners 4a and 4b
Is a bulk type that uses a polarization prism, and the polarization-maintaining chromatic dispersion compensating optical fiber 5 has a core structure similar to that of the chromatic dispersion compensating optical fiber 2 described above and has a cladding portion. PANDA with stress applying part
Type optical fiber is used.
【００２２】また、上記第１の偏波合成器４ａの入力端
面において、伝送されてきた信号光の偏波状態を保持す
るため、入力端子６ａとの間に偏波保存光ファイバ５ａ
が設けられている。Further, at the input end face of the first polarization beam combiner 4a, in order to maintain the polarization state of the transmitted signal light, the polarization maintaining optical fiber 5a is provided between the input terminal 6a and the input terminal 6a.
Is provided.
【００２３】なお、通常の場合、光送信器（図示せず）
に用いられる半導体レーザからの出力光はもともと実質
的に直線偏波であるので、この光送信器あるいは伝送用
光ファイバにおける偏波状態を保持したまま当該波長分
散補償器へ信号光を入力するため、この実施例では偏波
保存光ファイバ５ａを介して信号光の入力を行ってお
り、任意の偏波状態を直線偏波状態に偏光する偏波制御
器を用いても同様の効果を奏する。In a normal case, an optical transmitter (not shown)
Since the output light from the semiconductor laser used in the above is essentially linearly polarized light, it is necessary to input the signal light to the chromatic dispersion compensator while maintaining the polarization state in this optical transmitter or optical fiber for transmission. In this embodiment, the signal light is input through the polarization-maintaining optical fiber 5a, and the same effect can be obtained by using a polarization controller that polarizes an arbitrary polarization state into a linear polarization state.
【００２４】なお、上記偏波面保存光ファイバ５ａ、５
ｂにも同様のパンダファイバを用いる。The polarization-maintaining optical fibers 5a, 5 are
The same panda fiber is used for b.
【００２５】この請求項２の発明によると、まず、光送
信器あるいは伝送用光ファイバから伝送されてきた信号
光（図中の記号は垂直偏波状態を示している）を入力端
子６ａから偏波面保存光ファイバ５ａを介して、第１の
偏波合成器４ａの一端面に入力する。According to the second aspect of the present invention, first, the signal light transmitted from the optical transmitter or the optical fiber for transmission (the symbol in the figure indicates a vertically polarized state) is polarized from the input terminal 6a. It is input to one end face of the first polarization beam combiner 4a via the wavefront maintaining optical fiber 5a.
【００２６】そして、この第１の偏波合成器４ａから出
力された信号光は偏波面保存型の波長分散補償光ファイ
バ５で伝搬され、偏波面を保持したまま第２の偏波合成
器４ｂに入力され、さらに偏波保存光ファイバ５ｂを介
してこの第２の偏波合成器４ｂの異なる偏波面に入力さ
せる。これにより、伝搬してきた信号光に直交する偏波
状態（図中の記号は水平偏波状態を示している）で、再
度偏波面保存型の波長分散補償光ファイバ５内を逆方向
に伝搬させることで、同一ファイバ中での信号光の２度
伝搬（逆方向）を可能にしている。The signal light output from the first polarization combiner 4a is propagated through the polarization-maintaining chromatic dispersion compensating optical fiber 5, and the second polarization combiner 4b is maintained while maintaining the polarization plane. To the different polarization plane of the second polarization combiner 4b via the polarization maintaining optical fiber 5b. As a result, in the polarization state orthogonal to the propagating signal light (the symbol in the drawing indicates the horizontal polarization state), the light is propagated in the opposite direction in the polarization-maintaining chromatic dispersion compensating optical fiber 5 again. This allows the signal light to propagate twice (in the opposite direction) in the same fiber.
【００２７】以上のように偏波面保存型の波長分散補償
光ファイバ５内を逆方向に伝搬してきた信号光は、第１
の偏波合成器４ａにおいて、最初に入力された信号光の
偏波状態とは異なる偏波状態となっているので、入力さ
れた端面とは異なる端面にある出力端子６ｂより出力さ
れる。As described above, the signal light propagating in the opposite direction in the polarization-maintaining type chromatic dispersion compensating optical fiber 5 is the first
Since the polarization combiner 4a has a polarization state different from the polarization state of the first input signal light, the signal light is output from the output terminal 6b on the end face different from the input end face.
【００２８】なお、上記実施例では偏波合成器として、
偏波プリズムを使用したバルク型を用いたが、特にこれ
に限定するものではなく、偏波面保存光ファイバを用い
たファイバカプラ型を用いても同様の効果を奏する。In the above embodiment, as the polarization combiner,
Although the bulk type using the polarization prism is used, the present invention is not limited to this, and the same effect can be obtained by using the fiber coupler type using the polarization-maintaining optical fiber.
【００２９】また、上記実施例では偏波面保存光ファイ
バとして、クラッド部に応力付与部をもつＰＡＮＤＡ型
光ファイバを用いたが、特にこれに限定するものではな
く、ボータイファイバ等の偏波面保存光ファイバによっ
ても同様の効果を奏する。Further, in the above-mentioned embodiment, as the polarization-maintaining optical fiber, the PANDA type optical fiber having the stress applying portion in the clad portion is used, but the invention is not particularly limited to this, and the polarization-maintaining optical fiber such as a bow-tie fiber is used. The same effect can be obtained with fibers.
【００３０】[0030]
【発明の効果】以上のようにこの発明によれば、当該波
長分散補償器を構成する波長分散補償光ファイバ中を、
伝送される光が２度伝搬するように構成している。As described above, according to the present invention, in the chromatic dispersion compensating optical fiber constituting the chromatic dispersion compensator,
It is configured such that the transmitted light propagates twice.
【００３１】具体的には、請求項１に係る波長分散補償
器は、波長分散補償光ファイバの一端を、入射方向と出
射方向を変えるために３端子の光サーキュレータと結合
させるとともに、他端を全反射終端させており、また、
偏波状態が直線偏波状態であることを前提とした請求項
２に係る波長分散補償器は、両端を偏波合成器と結合さ
せ、その一方の偏波合成器における異なる偏波面同志を
偏波面保存光ファイバによりループ状に結合するように
構成したので、波長分散補償機能を十分保持したまま上
記光ファイバ中の２度伝搬を実現することができ、これ
により収納性（小型化）のよい波長分散補償器が得られ
るという効果がある。Specifically, in the chromatic dispersion compensator according to the first aspect, one end of the chromatic dispersion compensating optical fiber is coupled with an optical circulator having three terminals to change the incident direction and the outgoing direction, and the other end is connected. It is terminated by total reflection, and also
The chromatic dispersion compensator according to claim 2, which is premised on that the polarization state is a linear polarization state, has both ends coupled to a polarization combiner and polarizes different polarization planes in one polarization combiner. Since the wavefront-maintaining optical fiber is configured to be coupled in a loop shape, it is possible to realize twice propagation in the optical fiber while sufficiently maintaining the chromatic dispersion compensation function, and thus the storage property (miniaturization) is good. There is an effect that a chromatic dispersion compensator can be obtained.
【図１】請求項１に係る波長分散補償器の構成を示すブ
ロック図である。FIG. 1 is a block diagram showing a configuration of a chromatic dispersion compensator according to claim 1.
【図２】請求項２に係る波長分散補償器の構成を示すブ
ロック図である。FIG. 2 is a block diagram showing a configuration of a chromatic dispersion compensator according to claim 2.
１…光サーキュレータ、２…波長分散補償光ファイバ、
３…全反射終端構造、４ａ、４ｂ…第１及び第２の偏波
合成器、５…偏波面保存型の波長分散補償光ファイバ、
５ａ、５ｂ…偏波面保存光ファイバ。1 ... Optical circulator, 2 ... Chromatic dispersion compensation optical fiber,
3 ... Total reflection termination structure, 4a, 4b ... First and second polarization combiners, 5 ... Polarization-maintaining chromatic dispersion compensating optical fiber,
5a, 5b ... Polarization maintaining optical fiber.
Claims (3)
合された第１の端子に入力した光を第２の端子から出力
し、出力手段として、該第２の端子に入力した光を第３
の端子から出力すべく、少なくとも３端子を有する光サ
ーキュレータと、 前記光サーキュレータの第２の端子に一端が接続される
とともに他端が全反射終端され、かつ前記伝送用光ファ
イバの波長分散と逆の極性の波長分散を有する波長分散
補償光ファイバを備えた波長分散補償器。1. The input means outputs the light input to the first terminal coupled to the transmission optical fiber from the second terminal, and the output means outputs the light input to the second terminal to the third terminal.
An optical circulator having at least three terminals for output from the terminal of the optical circulator, one end of which is connected to the second terminal of the optical circulator and the other end of which is subjected to total reflection termination, and which is reverse to the wavelength dispersion of the transmission optical fiber. Dispersion compensator comprising a chromatic dispersion compensating optical fiber having chromatic dispersion of the opposite polarity.
の波長分散を有するとともに、偏光面を保持する波長分
散補償光ファイバと、 前記波長分散補償光ファイバの両端に接続する第１及び
第２の偏波合成器と、 前記第２の偏波合成器における一方の偏波面と他方の偏
波面とをループ状に結合させる偏波面保存光ファイバを
備えた波長分散補償器。2. A chromatic dispersion compensating optical fiber having a chromatic dispersion having a polarity opposite to that of the chromatic dispersion of a transmission optical fiber and holding a polarization plane, and a first and a first connecting to both ends of the chromatic dispersion compensating optical fiber. A chromatic dispersion compensator comprising: a second polarization combiner; and a polarization-maintaining optical fiber that couples one polarization plane and the other polarization plane in the second polarization combiner in a loop.
に、偏波面保存光ファイバを設けるか、あるいは任意の
偏波状態を直線偏波状態に変換する偏波制御器を設けた
ことを特徴とする請求項２記載の波長分散補償器。3. A polarization-maintaining optical fiber is provided between the first polarization combiner and the input end, or a polarization controller for converting an arbitrary polarization state into a linear polarization state is provided. The chromatic dispersion compensator according to claim 2, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06023393A JP3186890B2 (en) | 1993-03-19 | 1993-03-19 | Chromatic dispersion compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06023393A JP3186890B2 (en) | 1993-03-19 | 1993-03-19 | Chromatic dispersion compensator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06276160A true JPH06276160A (en) | 1994-09-30 |
| JP3186890B2 JP3186890B2 (en) | 2001-07-11 |
Family
ID=13136258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06023393A Expired - Fee Related JP3186890B2 (en) | 1993-03-19 | 1993-03-19 | Chromatic dispersion compensator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3186890B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08307347A (en) * | 1995-04-28 | 1996-11-22 | Nec Corp | Wavelength dispersion compensating device |
| US6198859B1 (en) | 1996-12-05 | 2001-03-06 | Nec Corporation | Dispersion compensating device using dispersion compensating fiber module |
| US6847759B2 (en) | 2002-04-24 | 2005-01-25 | Fujitsu Limited | Wavelength dispersion compensating filter |
| KR20210094731A (en) | 2020-01-22 | 2021-07-30 | 주식회사 효성 | Gas supply system and gas filling device using the same |
-
1993
- 1993-03-19 JP JP06023393A patent/JP3186890B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08307347A (en) * | 1995-04-28 | 1996-11-22 | Nec Corp | Wavelength dispersion compensating device |
| US6198859B1 (en) | 1996-12-05 | 2001-03-06 | Nec Corporation | Dispersion compensating device using dispersion compensating fiber module |
| US6847759B2 (en) | 2002-04-24 | 2005-01-25 | Fujitsu Limited | Wavelength dispersion compensating filter |
| KR20210094731A (en) | 2020-01-22 | 2021-07-30 | 주식회사 효성 | Gas supply system and gas filling device using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3186890B2 (en) | 2001-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5596448A (en) | Dispersion compensator and optical amplifier | |
| EP1229673A2 (en) | Pump light source device for optical, raman amplification and optical raman amplification system using the same | |
| US20050018967A1 (en) | Plug-in module for providing bi-directional data transmission | |
| US5600738A (en) | Polarization dispersion compensation for optical devices | |
| US20040086214A1 (en) | Optical circulator for bi-directional communication | |
| US6882764B1 (en) | Polarization independent packaging for polarization sensitive optical waveguide amplifier | |
| JP3186890B2 (en) | Chromatic dispersion compensator | |
| US6782147B2 (en) | Optical phase shifting, splitting and combining device | |
| US6546165B2 (en) | Optical multiplexing/demultiplexing module | |
| JP3317999B2 (en) | Optical isolator | |
| EP0634025A1 (en) | Improvements to optical phase shifting | |
| JPH0854525A (en) | Fiber type dispersion compensating device | |
| JP4421143B2 (en) | Polarization-maintaining optical fiber grating, optical module, and optical communication system | |
| JPS623205A (en) | Bidirectional optical repeating system | |
| JPS5981618A (en) | Optical coupler | |
| JP2931210B2 (en) | Dispersion compensation apparatus and dispersion compensation method | |
| AU675424B2 (en) | Improvements to optical phase shifting | |
| JP3716981B2 (en) | Optical isolator | |
| JP3112030B2 (en) | Waveguide type optical coupler | |
| JP4118727B2 (en) | Optical passive components | |
| JP3209300B2 (en) | Optical circuit for dispersion compensation | |
| US6624938B1 (en) | Optical circulator | |
| JPS619606A (en) | Improvement of extinction ratio of optical fiber and communication equipment utilizing said fiber | |
| JPH05224249A (en) | Nonlinear optical device | |
| JPH0293623A (en) | Reflection type optical amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |