JP2003228089A - Optical switch - Google Patents
Optical switchInfo
- Publication number
- JP2003228089A JP2003228089A JP2002026823A JP2002026823A JP2003228089A JP 2003228089 A JP2003228089 A JP 2003228089A JP 2002026823 A JP2002026823 A JP 2002026823A JP 2002026823 A JP2002026823 A JP 2002026823A JP 2003228089 A JP2003228089 A JP 2003228089A
- Authority
- JP
- Japan
- Prior art keywords
- optical path
- optical
- path switching
- input
- inspection
- 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
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は光スイッチに関
し、特に、光通信に用いられ、光スイッチ素子がＮ×Ｍ
のマトリクス状に配列された光スイッチに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical switch, and more particularly, it is used for optical communication, and an optical switch element is N × M.
Of optical switches arranged in a matrix.
【０００２】[0002]
【従来の技術】光スイッチとして、光スイッチ内に検査
用光源を設け、光路切換部が正常に動作しているかを検
査する手法が特開昭６４‐５９２２０号公報に記載され
ている。2. Description of the Related Art As an optical switch, Japanese Patent Application Laid-Open No. 64-59220 discloses a method of providing a light source for inspection in the optical switch and inspecting whether an optical path switching section is operating normally.
【０００３】図５はその構成を示すブロック図である。
図５において、入力光ファイバ１１〜１４は入力部ＩＮ
−１〜ＩＮ−４のそれぞれに対応して設けられており、
出力光ファイバ２１〜２４は出力部ＯＵＴ−１〜ＯＵＴ
−４のそれぞれに対応して設けられている。これらの入
力と出力が４列４行でマトリクス状に配列され、それぞ
れの交点（１，１）〜（４，４）に光スイッチ素子が配
置されて、光路切換部３が構成されている。図５におい
て光スイッチ素子は○で示されている。FIG. 5 is a block diagram showing its configuration.
In FIG. 5, input optical fibers 11 to 14 are input parts IN
It is provided corresponding to each of -1 to IN-4,
The output optical fibers 21 to 24 are output sections OUT-1 to OUT.
-4 is provided corresponding to each. These inputs and outputs are arranged in a matrix with 4 columns and 4 rows, and optical switching elements are arranged at the respective intersections (1, 1) to (4, 4) to form the optical path switching unit 3. In FIG. 5, the optical switch element is indicated by a circle.
【０００４】さらに、光路切換部３が正常に動作してい
るかを確認するために、入力部ＩＮ−１と出力部ＯＵＴ
−４に対して平行に監視用光路４が配置されており、監
視用光路４の入力側に監視用光源５から光が入射され、
監視光出力６側で入射光が検知される。そして、調べた
い光路切換部３の光路に監視光を進行させ、光路切換部
３を通った光を監視光出力６側で検知する。Further, in order to confirm whether the optical path switching unit 3 is operating normally, the input unit IN-1 and the output unit OUT are provided.
-4 is arranged in parallel to the monitoring optical path 4, light is incident from the monitoring light source 5 on the input side of the monitoring optical path 4,
Incident light is detected on the monitor light output 6 side. Then, the monitoring light is advanced to the optical path of the optical path switching unit 3 to be examined, and the light passing through the optical path switching unit 3 is detected at the monitoring light output 6 side.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、図５に
示した方法では、光スイッチが動作中にすべての光路切
換部３を監視することができない。仮に、光路切換部３
の各交点（１，１），（２，２），（３，３），（４，
４）の光スイッチ素子が反射状態になっている場合、光
路切換部３の交点（１，２），（１，３），（１，
４），（２，３），（２，４），（３，４）の光スイッ
チ素子については、反射状態となっている光スイッチ素
子のために光が届かず、検査することができない。よっ
て、これらの光路切換部３を検査する場合には、光スイ
ッチの動作を停止するしかなくなる。However, in the method shown in FIG. 5, it is not possible to monitor all the optical path switching units 3 during the operation of the optical switch. Temporarily, the optical path switching unit 3
Intersections (1,1), (2,2), (3,3), (4
When the optical switch element of 4) is in the reflection state, the intersections (1, 2), (1, 3), (1,
The optical switch elements 4), (2, 3), (2, 4) and (3, 4) cannot be inspected because light does not reach them because of the optical switch elements in the reflection state. Therefore, when inspecting these optical path switching units 3, the operation of the optical switch has to be stopped.
【０００６】それゆえに、この発明の主たる目的は、光
スイッチの動作を停止することなく、全ての光路切換部
の検査が可能な光スイッチを提供することである。Therefore, a main object of the present invention is to provide an optical switch capable of inspecting all the optical path switching parts without stopping the operation of the optical switch.
【０００７】[0007]
【課題を解決するための手段】この発明は、Ｎ個の入力
光部と、Ｍ個の出力光部と、Ｎ個の入力光部とＭ個の出
力光部とを結ぶ光路の交点に配置された複数の光路切換
部とを有する格子型の光スイッチにおいて、Ｎ個の入力
光部およびＭ個の出力光部に近接して配置される予備光
路と、入力光部からの光路および出力光部からの光路
と、予備光路との交点に配置される検査用光路切換部
と、予備光路の入力端に配置される検査用光源と、予備
光路の出力端に配置される検査用光検出部とを有し、光
路の検査時において、検査用光路切換部を反射状態とす
ることで、Ｎ個の入力光における少なくとも１つの入力
光を予備光路に導き、かつ光路に検査用光源からの光を
導くことを特徴とする。According to the present invention, N input light sections, M output light sections, and optical paths connecting the N input light sections and the M output light sections are arranged. In a lattice type optical switch having a plurality of optical path switching sections, a preliminary optical path arranged in proximity to N input optical sections and M output optical sections, an optical path from the input optical section and an output optical section. Inspection optical path switching unit arranged at the intersection of the optical path from the auxiliary optical path and the auxiliary optical path, an inspection light source arranged at the input end of the auxiliary optical path, and an inspection light detection unit arranged at the output end of the auxiliary optical path. And, at the time of inspecting the optical path, by setting the inspection optical path switching unit in a reflective state, at least one input light of the N input lights is guided to the auxiliary optical path, and the light from the inspection light source is introduced into the optical path. It is characterized by leading.
【０００８】これにより、光スイッチの動作を停止する
ことなく、全ての光路切換部の検査を可能にすることが
できる。With this, it is possible to inspect all the optical path switching units without stopping the operation of the optical switch.
【０００９】また、検査用光検出部は、Ｎ個の入力部か
らの光路の相対する位置に配置され、予備光路の検査用
光路切換部のうち、Ｎ個の入力部のうちの任意の入力部
ｎとの交点に配置された光路切換部を反射状態に切換え
るとともに、予備光路の検査用光路切換部のうち、Ｍ個
の出力部のうちの任意の出力部ｍとの交点に配置された
光路切換部を反射状態に切換え、さらに、入力部ｎから
の光路の光路切換部を直進状態に切換えることを特徴と
する。Further, the inspection photodetection section is arranged at a position where the optical paths from the N input sections are opposed to each other, and any one of the N input sections of the inspection optical path switching section of the auxiliary optical path is input. The optical path switching section arranged at the intersection with the section n is switched to the reflection state, and is arranged at the intersection with any output section m of the M output sections of the inspection optical path switching section of the preliminary optical path. It is characterized in that the optical path switching section is switched to the reflecting state, and further the optical path switching section of the optical path from the input section n is switched to the straight traveling state.
【００１０】また、検査用光検出部は、Ｍ個の出力部へ
の光路の相対する位置に配置され、予備光路の検査用光
路切換部のうち、Ｎ個の入力部のうちの任意の入力部ｎ
との交点に配置された光路切換部を反射状態に切換える
とともに、予備光路の検査用光路切換部のうち、Ｍ個の
出力部のうちの任意の出力部ｍとの交点に配置された光
路切換部を反射状態に切換え、さらに、出力部ｍへの光
路の光路切換部を直進状態に切換えることを特徴とす
る。Further, the inspection photodetection section is arranged at a position where the optical paths to the M output sections face each other, and any one of the N input sections of the inspection optical path switching section of the auxiliary optical path is input. Part n
And switching the optical path switching section arranged at the intersection with the optical path switching section arranged at the intersection with any output section m of the M output sections of the inspection optical path switching section of the preliminary optical path. It is characterized in that the section is switched to the reflective state, and further the optical path switching section of the optical path to the output section m is switched to the straight traveling state.
【００１１】さらに、予備光路の検査用光路切換部のう
ち、Ｎ個の入力部のうちの任意の入力部ｎとの交点に配
置された光路切換部を反射状態に切換えるとともに、予
備光路の検査用光路切換部のうち、Ｍ個の出力部のうち
の任意の出力部ｍとの交点に配置された光路切換部を反
射状態に切換え、さらに、入力部ｎと出力部ｍとの結ぶ
光路上の光路切換部のうち、入力部ｎと出力部ｍとの交
点に配置された光路切換部を反射状態とし、残りの光路
切換部を直進状態に切換えることを特徴とする。Further, among the inspection optical path switching units for the preliminary optical path, the optical path switching unit arranged at the intersection of any of the N input units with the arbitrary input unit n is switched to the reflective state, and the preliminary optical path inspection is performed. Of the optical path switching units, the optical path switching unit arranged at the intersection with any output unit m of the M output units is switched to the reflecting state, and further on the optical path connecting the input unit n and the output unit m. Among the optical path switching units, the optical path switching unit arranged at the intersection of the input unit n and the output unit m is set in the reflecting state, and the remaining optical path switching units are switched in the straight traveling state.
【００１２】[0012]
【発明の実施の形態】図１はこの発明の第１の実施形態
におけるブロック図である。図１において、この発明の
実施形態ではＮ×Ｎ光スイッチマトリクスの中に予備光
路を設け、検査したい光路の光を予備光路に移し、空い
た光路の光路切換部を検査用光を用いて検査する。すな
わち、図１に示すように光路切換部３０は図５と同様に
して４×４のマトリクス状に光スイッチ素子が配列され
て構成されており、入力光ファイバ１１〜１４および出
力光ファイバ２１〜２４に近接して予備光路７が設けら
れている。この予備光路７と１行〜４行および１列〜４
列の各交点にも光スイッチ素子が設けられている。FIG. 1 is a block diagram of a first embodiment of the present invention. In FIG. 1, according to the embodiment of the present invention, a spare optical path is provided in an N × N optical switch matrix, light of an optical path to be inspected is transferred to the spare optical path, and an optical path switching unit of an empty optical path is inspected by using inspection light. To do. That is, as shown in FIG. 1, the optical path switching unit 30 is configured by arranging optical switch elements in a 4 × 4 matrix in the same manner as in FIG. 5, and the input optical fibers 11 to 14 and the output optical fibers 21 to 21. A preliminary optical path 7 is provided adjacent to 24. This spare optical path 7 and 1st to 4th rows and 1st column to 4th
An optical switching element is also provided at each intersection of the columns.
【００１３】ここで光の進路を切換える光スイッチ素子
としては、特願２０００−３７１３５１号に記載されて
いる交点に切込み加工を行ったポリイミド導波路型スイ
ッチが望ましい。このスイッチでは２方向からの入力光
をともに反射させることができる。Here, as the optical switch element for switching the light path, a polyimide waveguide type switch described in Japanese Patent Application No. 2000-371351 in which a notch is formed is desirable. This switch can reflect both input light from two directions.
【００１４】図１では全ての光路が動作している状態の
一例を示している。ここで、交点の記号のうち、十字線
は直進する状態を表しており、斜め２本線は光が直角に
反射して光が曲がる状態を表している。そして、図１で
は、入力ＩＮ−１はＯＵＴ−１に、ＩＮ−２はＯＵＴ−
２に、ＩＮ−３はＯＵＴ−３に、ＩＮ−４はＯＵＴ−４
に選択されている状態である。予備光路７の光路切換部
はすべて直進状態になっている。また、予備光路７には
検査用光源８が配置され、入力部ＩＮ−１〜ＩＮ−４に
相対する行には検査用光検出器９１〜９４が配置されて
いる。FIG. 1 shows an example of a state in which all the optical paths are operating. Here, among the symbols at the intersections, the cross-shaped line represents the state of going straight, and the diagonal two-line represents the state where the light is reflected at a right angle and the light is bent. In FIG. 1, the input IN-1 is OUT-1 and the input IN-2 is OUT-.
2, IN-3 to OUT-3, IN-4 to OUT-4
Is selected. All the optical path switching portions of the auxiliary optical path 7 are in a straight traveling state. Further, the inspection light source 8 is arranged in the auxiliary optical path 7, and the inspection photodetectors 91 to 94 are arranged in the rows facing the input units IN-1 to IN-4.
【００１５】図２は図１に示した実施形態の構成で光路
を検査する状態を示す図である。この図２では入力ＩＮ
−２の光は予備光路７に移されている。このために、入
力ＩＮ−２直後の光路切換部３０の交点（０，２）の光
スイッチ素子と、出力ＯＵＴ−２」直前の光路切換部３
０の交点（２，０）の光スイッチ素子とを反射状態にし
ている。これによって、入力ＩＮ−２からの光は光路切
換部３０の交点（０，２）の光スイッチ素子で反射して
予備光路の０列を通り、０行光路に曲がって進行してい
く。そして、光路切換部３０の交点（２，０）の光スイ
ッチ素子で再び反射し、ＯＵＴ−２へと射出していく。FIG. 2 is a diagram showing a state in which the optical path is inspected in the configuration of the embodiment shown in FIG. In this FIG. 2, input IN
-2 light has been moved to the spare optical path 7. For this reason, the optical switch element at the intersection (0, 2) of the optical path switching unit 30 immediately after the input IN-2 and the optical path switching unit 3 immediately before the output OUT-2 ”.
The optical switch element at the intersection point (2, 0) of 0 is set in a reflective state. As a result, the light from the input IN-2 is reflected by the optical switching element at the intersection (0, 2) of the optical path switching unit 30, passes through the 0th column of the preliminary optical path, and goes to the 0th row optical path. Then, it is reflected again by the optical switch element at the intersection (2, 0) of the optical path switching unit 30 and emitted to OUT-2.
【００１６】このように予備光路７を配置することによ
り、予備光路７に移しても入力射出の関係に影響を与え
ず他の光路にも影響を与えないという優れた効果を奏す
ることができる。By arranging the auxiliary optical path 7 in this way, it is possible to obtain an excellent effect that even if the auxiliary optical path 7 is moved to the auxiliary optical path 7, it does not affect the relationship of input emission and does not affect other optical paths.
【００１７】ここで、０列に配置した検査用光源８から
の光は、光路切換部３０の交点（０，２）の光スイッチ
素子が反射状態となっているので、今、空いている光路
である２行に反射して進んでいく。そして、光路切換部
３０の交点（１，２）〜（４，２）の光スイッチ素子を
全て直進状態としておくことで、この光は２行に配置し
た光検出器９２に入射される。この光検出器９２の出力
値から前述の光路切換部３０の交点（１，２）〜（４，
２）の各光スイッチ素子およびこれらを結ぶ導波路が正
常に動作していることがわかる。Here, the light from the inspection light source 8 arranged in the 0th row is reflected by the optical switch element at the intersection (0, 2) of the optical path switching unit 30, so that the optical path that is currently vacant is present. It reflects on 2 lines and goes on. Then, by setting all the optical switch elements at the intersections (1, 2) to (4, 2) of the optical path switching unit 30 in the straight traveling state, this light is incident on the photodetectors 92 arranged in two rows. Based on the output value of the photodetector 92, the intersections (1, 2) to (4) of the optical path switching unit 30 described above are used.
It can be seen that the optical switch elements of 2) and the waveguides connecting them are operating normally.
【００１８】１行の光路、３行の光路、４行の光路につ
いても同様に対応する予備光路７の光路切換部３０を反
射状態として、検査用光検出器９１，９３，９４で検査
できる。また、すべて本光路を図１に示すように動作の
状態では、予備光路７の光路切換部はすべて直進状態と
なっているので、検査光は光検出器９０に入射し、予備
光路７の光路切換部の検査も行うことができる。よっ
て、光スイッチ中の光路切換部すべてを検査することが
できる。With respect to the optical paths of the first row, the optical paths of the third row, and the optical paths of the fourth row, the optical path switching section 30 of the corresponding auxiliary optical path 7 can be similarly inspected by the inspection photodetectors 91, 93, 94. Further, when all the main optical paths are in the operating state as shown in FIG. 1, all the optical path switching parts of the spare optical path 7 are in the straight traveling state, so that the inspection light enters the photodetector 90 and the optical path of the spare optical path 7 is reached. Inspection of the switching unit can also be performed. Therefore, it is possible to inspect all the optical path switching units in the optical switch.
【００１９】また、この実施形態では、検出部で検出し
た光出力値をメモリに記憶させておき、今回の検査での
光出力値と前回の光出力値とを比較して劣化の度合を判
断することができ、ユーザに光スイッチ装置の交換を事
前に促すことができる。これにより、突然の故障による
ネットワークの遮断を防止できる。Further, in this embodiment, the optical output value detected by the detection unit is stored in the memory, and the optical output value of this inspection is compared with the previous optical output value to judge the degree of deterioration. It is possible to prompt the user to replace the optical switch device in advance. This prevents the network from being shut down due to a sudden failure.
【００２０】図３は図１に示した第１の実施形態の変形
例であり、検査用光源と検査用光検出器の配置が異なっ
ている。図１および図２では、行上の光路切換部を検査
するようにしたが、図３に示した例では、入力ＩＮ−１
は出力ＯＵＴ−１に、ＩＮ−２はＯＵＴ−２に、ＩＮ−
３はＯＵＴ−３に、ＩＮ−４はＯＵＴ−４に選択されて
いる。また、予備光路７の光路切換部も第１の実施形態
と同様にして光路切換部３０の交点（０，２）と（２，
０）の各光スイッチ素子を反射状態としており、ＩＮ−
２がＯＵＴ−２にいたる光路を予備光路としている。FIG. 3 shows a modification of the first embodiment shown in FIG. 1, in which the arrangement of the inspection light source and the inspection photodetector is different. 1 and 2, the optical path switching unit on the row is inspected, but in the example shown in FIG. 3, the input IN-1 is used.
To output OUT-1, IN-2 to OUT-2, IN-
3 is selected as OUT-3 and IN-4 is selected as OUT-4. Further, the optical path switching section of the auxiliary optical path 7 is also the same as in the first embodiment, and the intersections (0, 2) and (2,
Each of the optical switch elements of 0) is in a reflective state, and IN-
The optical path from 2 to OUT-2 is the auxiliary optical path.
【００２１】ここで、検査用光源８の光は光路切換部３
０の交点（２，０）の光スイッチ素子で反射し、２列の
光路に入射する。２列の光路切換部は直進状態としてい
るので、検査光は２列の光路を直進し、検査用検出器９
で光を検出する。１列、２列、４列についても同様にし
て検査することができる。Here, the light from the inspection light source 8 receives the light from the optical path switching unit 3.
The light is reflected by the optical switch element at the intersection (2, 0) of 0 and enters the optical paths in two rows. Since the optical path switching units in the two rows are in the straight traveling state, the inspection light travels straight in the optical paths in the two rows, and the inspection detector 9
To detect light. The same inspection can be performed for the first row, the second row, and the fourth row.
【００２２】図４はこの発明の第２の実施形態を示すブ
ロック図である。この実施形態は、あるルートを予備光
路７に移した際に、本光路の切換部もそのルートを辿る
ように光路切換部３０を動作させる。これにより、光路
切換部３０は直進状態だけでなく、反射状態での検査も
できる。また、検査用光検出器９は予備光路７に配置し
た１つだけでよい。入射と射出の関係はこれまでと同じ
である。また、入力ＩＮ−２と出力ＯＵＴ−２の光路を
予備光路７に移している。FIG. 4 is a block diagram showing a second embodiment of the present invention. In this embodiment, when a certain route is moved to the spare optical path 7, the optical path switching unit 30 is operated so that the switching unit of the main optical path also follows the route. Thereby, the optical path switching unit 30 can be inspected not only in the straight traveling state but also in the reflecting state. Further, the inspection photodetector 9 may be only one provided in the auxiliary optical path 7. The relationship between incidence and emission is the same as before. Further, the optical paths of the input IN-2 and the output OUT-2 are moved to the auxiliary optical path 7.
【００２３】ここで、本光路の光路切換え前は入力ＩＮ
−２から出力ＯＵＴ−２に光が導かれる状態のままとな
っている。すなわち、（１，２）直進、（２，２）反
射、（２，３）直進、（２，４）直進の状態である。こ
の状態では、検査用光源８からの光は光路切換部３０の
交点（０，２）の光スイッチ素子で反射し、出力ＯＵＴ
−２へ至るルートを辿るが、出力ＯＵＴ−２直前の予備
光路７の光路切換部３０の交点（２，０）の光スイッチ
素子は反射状態となっているので、ここで反射して予備
光路を通り、検査用光検出器に入射する。Before switching the optical path of the main optical path, the input IN
-2 remains in the state where light is guided to the output OUT-2. That is, the states are (1,2) straight ahead, (2,2) reflection, (2,3) straight ahead, and (2,4) straight ahead. In this state, the light from the inspection light source 8 is reflected by the optical switch element at the intersection (0, 2) of the optical path switching unit 30, and the output OUT
-2, the optical switch element at the intersection (2, 0) of the optical path switching unit 30 of the auxiliary optical path 7 immediately before the output OUT-2 is in the reflective state, and is reflected here so that the auxiliary optical path is reached. Incident on the inspection photodetector.
【００２４】他の光路についても同様であり、予備光路
７の光路切換部を反射状態に切換えることで、予備光路
７に光を移し、空いた光路の動作を自動的に検査するこ
とができる。そして、本光路での光のルートを検査し正
常動作を確認した上で、予備光路７から本光路に光を移
すことができ、信頼性を高めることができる。The same applies to the other optical paths. By switching the optical path switching section of the spare optical path 7 to the reflective state, light can be transferred to the spare optical path 7 and the operation of the vacant optical path can be automatically inspected. Then, after checking the route of the light in the main optical path and confirming the normal operation, the light can be transferred from the auxiliary optical path 7 to the main optical path, and the reliability can be improved.
【００２５】今回開示された実施の形態はすべての点で
例示であって制限的なものではないと考えられるべきで
ある。本発明の範囲は上記した説明ではなくて特許請求
の範囲によって示され、特許請求の範囲と均等の意味お
よび範囲内でのすべての変更が含まれることが意図され
る。The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.
【００２６】[0026]
【発明の効果】以上のように、この発明によれば、Ｎ個
の入力光部と、Ｍ個の出力光部と、Ｎ個の入力光部とＭ
個の出力光部とを結ぶ光路の交点に配置された複数の光
路切換部とを有する格子型の光スイッチにおいて、Ｎ個
の入力光部およびＭ個の出力光部に近接して配置される
予備光路と、入力光部からの光路および出力光部からの
光路と、予備光路との交点に配置される検査用光路切換
部と、予備光路の入力端に配置される検査用光源と、予
備光路の出力端に配置される検査用光検出部とを有し、
光路の検査時において、検査用光路切換部を反射状態と
することで、Ｎ個の入力光における少なくとも１つの入
力光を予備光路に導き、かつ光路に検査用光源からの光
を導くことで、光スイッチの動作を停止することなく、
全ての光路切換部の検査を可能にすることができる。As described above, according to the present invention, N input light sections, M output light sections, N input light sections and M input light sections are provided.
In a lattice type optical switch having a plurality of optical path switching units arranged at intersections of optical paths connecting the output optical units, the optical switches are arranged in proximity to N input optical units and M output optical units. A spare optical path, an optical path from the input optical section and an optical path from the output optical section, and an inspection optical path switching section arranged at the intersection of the spare optical path, an inspection light source arranged at the input end of the spare optical path, and a spare. And an inspection photodetector arranged at the output end of the optical path,
At the time of inspecting the optical path, by making the inspection optical path switching unit in the reflective state, at least one input light of the N input lights is guided to the auxiliary optical path, and the light from the inspection light source is guided to the optical path. Without stopping the operation of the optical switch
It is possible to inspect all the optical path switching units.
【図１】 この発明の第１の実施形態における光スイッ
チのブロック図である。FIG. 1 is a block diagram of an optical switch according to a first embodiment of the present invention.
【図２】 図１に示した実施形態の構成で光路を検査す
る状態を示す図である。FIG. 2 is a diagram showing a state of inspecting an optical path with the configuration of the embodiment shown in FIG.
【図３】 図１に示した第１の実施形態の変形例であ
る。FIG. 3 is a modification of the first embodiment shown in FIG.
【図４】 この発明の第２の実施形態における光スイッ
チのブロック図である。FIG. 4 is a block diagram of an optical switch according to a second embodiment of the present invention.
【図５】 特開昭６４‐５９２２０号公報に記載されて
いる光スイッチのブロック図である。FIG. 5 is a block diagram of an optical switch described in Japanese Patent Laid-Open No. 64-59220.
７ 予備光路、８ 検査用光源、９，９０〜９４ 検査
用光検出器、１１〜１４ 入力光ファイバ、２１〜２４
出力光ファイバ、３０ 光路切換部。7 preliminary optical paths, 8 inspection light source, 9, 90-94 inspection photodetector, 11-14 input optical fiber, 21-24
Output optical fiber, 30 optical path switching unit.
Claims (4)
前記Ｎ個の入力光部と前記Ｍ個の出力光部とを結ぶ光路
の交点に配置された複数の光路切換部とを有する格子型
の光スイッチにおいて、 前記Ｎ個の入力光部および前記Ｍ個の出力光部に近接し
て配置される予備光路と、 前記入力光部からの光路および前記出力光部からの光路
と、前記予備光路との交点に配置される検査用光路切換
部と、 前記予備光路の入力端に配置される検査用光源と、 前記予備光路の出力端に配置される検査用光検出部とを
有し、 前記光路の検査時において、前記検査用光路切換部を反
射状態とすることで、Ｎ個の入力光における少なくとも
１つの入力光を前記予備光路に導き、かつ前記光路に前
記検査用光源からの光を導くことを特徴とする、光スイ
ッチ。1. N input light sections, M output light sections,
A lattice type optical switch having a plurality of optical path switching units arranged at intersections of optical paths connecting the N input optical units and the M output optical units, wherein the N input optical units and the M optical switches are provided. A preliminary optical path arranged in proximity to the individual output light section, an optical path from the input light section and an optical path from the output light section, and an inspection optical path switching section arranged at an intersection of the preliminary light path, It has an inspection light source arranged at the input end of the preliminary optical path, and an inspection light detection unit arranged at the output end of the preliminary optical path, and reflects the inspection optical path switching unit during inspection of the optical path. The optical switch is characterized in that at least one of the N input lights is guided to the preliminary optical path and the light from the inspection light source is guided to the optical path by setting the state.
部からの光路の相対する位置に配置され、 前記予備光路の検査用光路切換部のうち、前記Ｎ個の入
力部のうちの任意の入力部ｎとの交点に配置された光路
切換部を反射状態に切換えるとともに、前記予備光路の
検査用光路切換部のうち、Ｍ個の出力部のうちの任意の
出力部ｍとの交点に配置された光路切換部を反射状態に
切換え、さらに、前記入力部ｎからの光路の光路切換部
を直進状態に切換えることを特徴とする、請求項１に記
載の光スイッチ。2. The inspection photodetection section is arranged at a position opposite to the optical path from the N input sections, and among the N input sections of the inspection optical path switching section of the auxiliary optical path. The optical path switching unit arranged at the intersection with any input unit n of the above is switched to the reflection state, and the optical path switching unit of the inspection optical path switching unit of the preliminary optical path is connected to any output unit m of M output units. The optical switch according to claim 1, wherein the optical path switching unit arranged at the intersection is switched to a reflective state, and further, the optical path switching unit of the optical path from the input unit n is switched to a straight traveling state.
部への光路の相対する位置に配置され、 前記予備光路の検査用光路切換部のうち、前記Ｎ個の入
力部のうちの任意の入力部ｎとの交点に配置された光路
切換部を反射状態に切換えるとともに、前記予備光路の
検査用光路切換部のうち、Ｍ個の出力部のうちの任意の
出力部ｍとの交点に配置された光路切換部を反射状態に
切換え、さらに、前記出力部ｍへの光路の光路切換部を
直進状態に切換えることを特徴とする、請求項１に記載
の光スイッチ。3. The inspection photodetection section is arranged at a position where the optical paths to the M output sections face each other, and among the N input sections of the inspection optical path switching section of the auxiliary optical path. The optical path switching unit arranged at the intersection with any input unit n of the above is switched to the reflection state, and the optical path switching unit of the inspection optical path switching unit of the preliminary optical path is connected to any output unit m of M output units. The optical switch according to claim 1, wherein the optical path switching unit arranged at the intersection is switched to a reflective state, and further, the optical path switching unit of the optical path to the output unit m is switched to a straight traveling state.
ち、前記Ｎ個の入力部のうちの任意の入力部ｎとの交点
に配置された光路切換部を反射状態に切換えるととも
に、前記予備光路の検査用光路切換部のうち、Ｍ個の出
力部のうちの任意の出力部ｍとの交点に配置された光路
切換部を反射状態に切換え、さらに、前記入力部ｎと前
記出力部ｍとの結ぶ光路上の光路切換部のうち、前記入
力部ｎと前記出力部ｍとの交点に配置された光路切換部
を反射状態とし、残りの光路切換部を直進状態に切換え
ることを特徴とする、請求項１に記載の光スイッチ。4. Of the inspection optical path switching section of the auxiliary optical path, an optical path switching section arranged at an intersection with an arbitrary input section n of the N input sections is switched to a reflection state, and the standby section is provided. Of the optical path inspection optical path switching units, the optical path switching unit disposed at the intersection with any output unit m of the M output units is switched to the reflective state, and the input unit n and the output unit m are further switched. Among the optical path switching sections on the optical path connecting with, the optical path switching section arranged at the intersection of the input section n and the output section m is set in the reflecting state, and the remaining optical path switching sections are switched to the straight traveling state. The optical switch according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002026823A JP2003228089A (en) | 2002-02-04 | 2002-02-04 | Optical switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002026823A JP2003228089A (en) | 2002-02-04 | 2002-02-04 | Optical switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003228089A true JP2003228089A (en) | 2003-08-15 |
| JP2003228089A5 JP2003228089A5 (en) | 2005-06-23 |
Family
ID=27748538
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002026823A Pending JP2003228089A (en) | 2002-02-04 | 2002-02-04 | Optical switch |
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| Country | Link |
|---|---|
| JP (1) | JP2003228089A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012172760A1 (en) * | 2011-06-14 | 2012-12-20 | 日本電気株式会社 | Optical switch control method, optical switch control device, and optical transmission system |
-
2002
- 2002-02-04 JP JP2002026823A patent/JP2003228089A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012172760A1 (en) * | 2011-06-14 | 2012-12-20 | 日本電気株式会社 | Optical switch control method, optical switch control device, and optical transmission system |
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