JP2002311308A - Optical transmitting and receiving equipment - Google Patents
Optical transmitting and receiving equipmentInfo
- Publication number
- JP2002311308A JP2002311308A JP2001121490A JP2001121490A JP2002311308A JP 2002311308 A JP2002311308 A JP 2002311308A JP 2001121490 A JP2001121490 A JP 2001121490A JP 2001121490 A JP2001121490 A JP 2001121490A JP 2002311308 A JP2002311308 A JP 2002311308A
- Authority
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- Japan
- Prior art keywords
- light
- wavelength band
- optical
- optical fiber
- 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.)
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Links
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- Optical Couplings Of Light Guides (AREA)
- Optical Communication System (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、第１の波長帯の光
で双方向通信を行い、第２の波長帯の光で局から端末側
への片方向通信を行う光波長分割多重化方式を用いた光
通信システムの端末側に設置される光送受信装置、又
は、第１の波長帯の光で双方向通信を行い、第２の波長
帯の光で局側から端末側への片方向通信を行うととも
に、策３の波長帯の光で光線路保守を行う光波長分割多
重化方式を用いた光通信システムの端末側に設置される
光送受信装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical wavelength division multiplexing system for performing bidirectional communication using light in a first wavelength band and performing one-way communication from a station to a terminal using light in a second wavelength band. An optical transmission / reception device installed on the terminal side of an optical communication system using the optical communication system, or bidirectional communication is performed using light in the first wavelength band, and unidirectional communication from the station side to the terminal side using light in the second wavelength band. The present invention relates to an optical transmission / reception apparatus installed on a terminal side of an optical communication system using an optical wavelength division multiplexing system for performing communication and maintaining an optical line with light in the wavelength band of measure 3.
【０００２】[0002]
【従来の技術】図７は、第１の波長帯λ1の光で双方向
通信を行い、第２の波長帯λ2の光で局側から端末側へ
の片方向通信を行う光波長分割多重化方式を用いた光通
信システムにおける従来の光送受信装置の構成を示す図
である。端末側に設置される光送受信装置４００は、双
方向通信を行うために光を送信又は受信する双方向通信
機能部４１１、片方向通信を行うために光を受信する片
方向通信機能部４１２、異なる波長帯が多重化された光
を分割し、また異なる波長帯の光を多重化するＷＤＭ
（波長分割多重：Wavelength Division Multiplexing）
モジュール４１３を有している。2. Description of the Related Art FIG. 7 shows an optical wavelength division system in which bidirectional communication is performed with light of a first wavelength band λ 1 and one-way communication is performed from a station side to a terminal side with light of a second wavelength band λ 2. FIG. 2 is a diagram illustrating a configuration of a conventional optical transmission / reception device in an optical communication system using a multiplexing method. The optical transmitting / receiving device 400 installed on the terminal side includes a bidirectional communication function unit 411 that transmits or receives light to perform bidirectional communication, a one-way communication function unit 412 that receives light to perform one-way communication, WDM for splitting light multiplexed in different wavelength bands and multiplexing light in different wavelength bands
(Wavelength Division Multiplexing)
A module 413 is provided.
【０００３】また、光ファイバ４２０は局側と端末側と
を、光ファイバ４２１は光コネクタ４２２とＷＤＭモジ
ュール４１３とを、光ファイバ４２５はＷＤＭモジュー
ル４１３と光コネクタ４２３とを、光ファイバ４２６は
ＷＤＭモジュール４１２と光コネクタ４２４とをそれぞ
れ接続する光伝送媒体であり、光コネクタ４２２は光フ
ァイバ４２０と光ファイバ４２１とを、光コネクタ４２
３は光ファイバ４２５と双方向通信機能部４１１とを、
光コネクタ４２４は光ファイバ４２６と片方向通信機能
部４１２とをそれぞれ接続する接続手段である。なお、
本明細書の図面に記載されている矢印は、光ファイバ内
の光の伝送方向である。また、本明細書では、第２の波
長帯λ2の光を送信する側を局側、第２の波長帯λ2の光
を受信する側（光送受信装置）を端末側と呼ぶことにす
る。The optical fiber 420 is connected to the office and the terminal, the optical fiber 421 is connected to the optical connector 422 and the WDM module 413, the optical fiber 425 is connected to the WDM module 413 and the optical connector 423, and the optical fiber 426 is connected to the WDM module. The optical connector 422 is an optical transmission medium that connects the module 412 and the optical connector 424, and the optical connector 422 connects the optical fiber 420 and the optical fiber 421 to each other.
3 is an optical fiber 425 and a two-way communication function unit 411,
The optical connector 424 is connection means for connecting the optical fiber 426 and the one-way communication function unit 412, respectively. In addition,
The arrows shown in the drawings of the present specification are the transmission directions of light in the optical fiber. In this specification, the side that transmits light in the second wavelength band λ 2 is referred to as a station side, and the side that receives light in the second wavelength band λ 2 (optical transmission / reception device) is referred to as a terminal side. .
【０００４】図７において、局側に接続された光ファイ
バ４２０の一端が光コネクタ４２２を介して、端末側の
光送受信装置４００の光ファイバ４２１に接続される。
さらに、光ファイバ４２１の一端はＷＤＭモジュール４
１３に接続されており、ＷＤＭモジュール４１３は、光
ファイバ４２０から光コネクタ４２２及び光ファイバ４
２１を介して入力された第１の波長帯λ1（例えば１．
３μｍ帯）の光を光ファイバ４２５に出力するととも
に、双方向通信機能部４１１から光ファイバ４２５を介
して入力された第１の波長帯λ1の光を光ファイバ４２
１に出力し、一方、光ファイバ４２０から光コネクタ４
２２及び光ファイバ４２１を介して入力された第２の波
長帯λ2（例えば１．５５μｍ帯）の光を光ファイバ４
２６に出力する。In FIG. 7, one end of an optical fiber 420 connected to a station is connected via an optical connector 422 to an optical fiber 421 of an optical transceiver 400 on the terminal side.
Further, one end of the optical fiber 421 is connected to the WDM module 4.
13, the WDM module 413 is connected from the optical fiber 420 to the optical connector 422 and the optical fiber 4.
The first wavelength band λ 1 (for example, 1.
(3 μm band) to the optical fiber 425, and the light of the first wavelength band λ 1 input from the bidirectional communication function unit 411 via the optical fiber 425 to the optical fiber 42.
1 from the optical fiber 420 to the optical connector 4
22 and the light of the second wavelength band λ 2 (for example, 1.55 μm band) input through the optical fiber 421
26.
【０００５】上記構成により、片方向通信機能部４１２
は局側から端末側への片方向通信に用いられる第２の波
長帯λ2の光だけを受信することが可能となり、双方向
通信機能部４１１は局側と端末側との双方向通信に用い
られる第１の波長帯λ1の光だけを送受信することが可
能となる。With the above configuration, the one-way communication function unit 412
Can receive only light of the second wavelength band λ 2 used for one-way communication from the station side to the terminal side, and the two-way communication function unit 411 can perform two-way communication between the station side and the terminal side. Only the light of the first wavelength band λ 1 used can be transmitted and received.
【０００６】また、従来のＷＤＭモジュール４１３に
は、ファイバ融着延伸型ＷＤＭモジュール、誘電体多層
膜フィルタ埋込型ＷＤＭモジュール、マッハツェンダ干
渉計型ＷＤＭモジュールなどがある。ファイバ融着延伸
型ＷＤＭモジュールは、２本の光ファイバを並べて、そ
れらを融着・延伸することで作成される。光学的効果に
より、１本の光ファイバの一端から入力された光の波長
の一部がもう１本の光ファイバから出力されることで波
長分割多重を行う。The conventional WDM module 413 includes a fiber fusion drawn WDM module, a dielectric multilayer filter embedded WDM module, and a Mach-Zehnder interferometer WDM module. The fiber fusion drawing type WDM module is created by arranging two optical fibers and fusing and drawing them. Due to an optical effect, a part of the wavelength of light input from one end of one optical fiber is output from another optical fiber to perform wavelength division multiplexing.
【０００７】また、誘電体多層膜フィルタ埋込型ＷＤＭ
モジュールは、基板上にファイバを埋め込み、さらにこ
の光ファイバ４２１を斜めに横切るように誘電体多層膜
フィルタを埋め込むとともに、誘電体多層膜フィルタに
よって反射された波長の光を基板上に埋め込まれたもう
１本の光ファイバに結合して出力することによって波長
分割多重を行う。また、マッハツェンダ干渉計型ＷＤＭ
モジュールは、基板上に形成された光導波路でマッハツ
ェンダ干渉計を構成し、光の入出力用ファイバを導波路
に結合させて波長分割多重を可能とするものであり、平
面導波路型とも呼ばれる。Also, a dielectric multilayer filter embedded WDM.
The module embeds a fiber on a substrate, further embeds a dielectric multilayer filter so as to obliquely cross the optical fiber 421, and embeds light of a wavelength reflected by the dielectric multilayer filter on the substrate. Wavelength division multiplexing is performed by coupling to one optical fiber for output. Mach-Zehnder interferometer WDM
The module constitutes a Mach-Zehnder interferometer with an optical waveguide formed on a substrate, and enables wavelength division multiplexing by coupling an optical input / output fiber to the waveguide, and is also called a planar waveguide type.
【０００８】また、従来の光通信システムでは、光線路
の予防保全を行うため、通信用の波長帯（第１の波長帯
λ1及び第２の波長帯λ2）の光とは異なった第３の波長
帯λ 3（例えば１．６５μｍ）の光を局側から端末側へ
送信し、端末側に設置される光送受信装置の手前でこの
波長帯を反射させ、端末側から局側に戻ってきた光を監
視して光線路保守を行う場合がある。通常、この光線路
保守用波長帯の光を端末側に設置される光送受信装置４
００の手前で反射させるためには、端末側に設置される
光送受信装置４００とは別に、フィルタ機能が埋め込ま
れた光コネクタが先端に接続された光ファイバが必要と
なる。In a conventional optical communication system, an optical line
Wavelength band for communications (first wavelength band)
λ1And the second wavelength band λTwo) A third wavelength different from the light of
Band λ Three(For example, 1.65 μm) light from the office to the terminal
Transmit and transmit this signal in front of the optical transceiver installed on the terminal side.
Reflects the wavelength band and monitors the light returning from the terminal to the station.
In some cases, optical line maintenance may be performed while viewing. Usually this optical line
Optical transmitting / receiving device 4 for installing light in the maintenance wavelength band on the terminal side
Installed on the terminal side to reflect before 00
Filter function is embedded separately from the optical transceiver 400
Optical connector is required
Become.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、従来の
端末側に設置される光送受信装置では、ＷＤＭ機能を個
別モジュールで実現しているため、部品点数が多く、価
格が高いという問題点があった。本発明は、上記問題点
に鑑み、部品点数が少なく、価格の低い端末側に設置さ
れる光送受信装置を提供することを目的とする。However, the conventional optical transmitter / receiver installed on the terminal side has a problem that the number of parts is large and the price is high because the WDM function is realized by an individual module. . The present invention has been made in view of the above problems, and has as its object to provide an optical transmitting and receiving apparatus that is installed on a low-price terminal side with a small number of components.
【００１０】[0010]
【課題を解決するための手段】上記の課題を解決するた
め、本発明の光送受信装置は、局側と端末側とを光ファ
イバで接続し、前記光ファイバを介して第１の波長帯の
光を用いて前記局側と前記端末側との双方向通信を行
い、前記光ファイバを介して第２の波長帯の光を用いて
前記局側から前記端末側への片方向通信を行う光波長分
割多重化方式を用いた光通信システムの前記端末側に配
置される光送受信装置であって、前記光ファイバと接続
して前記第１及び第２の波長帯の光を伝送する端末側光
ファイバと、前記端末側光ファイバと接続して前記端末
側光ファイバを介して前記第１の波長帯の光の送受信を
行う双方向通信機能部と、前記第２の波長帯の光を受光
する受光素子を有し、前記端末側光ファイバを介して前
記第２の波長帯の光の受信を行う片方向通信機能部と、
前記第１の波長帯の光を透過させて前記第２の波長帯の
光を反射する第１の光学部材とを有し、前記第１の光学
部材で反射された前記第２の波長帯の光が前記受光素子
に受光されるよう、前記端末側光ファイバに前記第１の
光学部材が配置される構成とする。この構成により、双
方向通信に用いられる第１の波長帯λ1の光と片方向通
信に用いられる第２の波長帯λ2の光とを波長分離し、
光ファイバを通さずに第２の波長帯λ2の光を受光素子
に入射させ、受光素子に入射した後、直ちに光電変換を
行うことが可能となり、さらに従来よりも低価格で部品
数の少ない光送受信装置を提供することが可能となる。In order to solve the above-mentioned problems, an optical transmitting / receiving apparatus according to the present invention connects an office side and a terminal side with an optical fiber, and transmits the first wavelength band through the optical fiber. Light for performing bidirectional communication between the station side and the terminal side using light, and performing one-way communication from the station side to the terminal side using light of a second wavelength band via the optical fiber. An optical transmission / reception device disposed on the terminal side of an optical communication system using a wavelength division multiplexing method, the terminal side light being connected to the optical fiber and transmitting light in the first and second wavelength bands. A fiber, a bidirectional communication function unit connected to the terminal-side optical fiber for transmitting and receiving light in the first wavelength band via the terminal-side optical fiber, and receiving light in the second wavelength band A light-receiving element, and light of the second wavelength band via the terminal-side optical fiber. A one-way communication function unit for receiving,
A first optical member that transmits the light of the first wavelength band and reflects the light of the second wavelength band, wherein the first optical member reflects the light of the second wavelength band. The first optical member is arranged on the terminal-side optical fiber so that light is received by the light receiving element. With this configuration, a second wavelength band lambda 2 light used for the first light and one-way communication wavelength band lambda 1 used for two-way communication with wavelength separation,
Light of the second wavelength band λ 2 is made incident on the light receiving element without passing through the optical fiber, and immediately after being incident on the light receiving element, photoelectric conversion can be performed. Further, the cost is lower and the number of parts is smaller than before. It is possible to provide an optical transceiver.
【００１１】また、さらに、前記双方向通信機能部の受
光素子が、前記第１の波長帯の光を受光して前記第２の
波長帯の光を反射する第２の光学部材を有する構成とす
る。この構成により、双方向通信機能部に第１の波長帯
λ1の光及び第２の波長帯λ2の光の両方が入射した場合
でも、双方向通信機能部の受光素子が第２の波長帯λ2
の光を反射（遮光）して第１の波長帯λ1の光のみを処
理し、第２の波長帯λ2の光による双方向通信の妨害を
避けることが可能となり、さらに従来よりも低価格で部
品数の少ない光送受信装置を提供することが可能とな
る。Further, the light receiving element of the two-way communication function unit has a second optical member for receiving the light of the first wavelength band and reflecting the light of the second wavelength band. I do. With this configuration, even if both of the first wavelength band lambda 1 light and the second wavelength band lambda 2 light two-way communication function unit is incident, the light receiving elements of the two-way communication function unit a second wavelength Band λ 2
Is reflected (shielded) to process only the light in the first wavelength band λ 1 , thereby preventing the light in the second wavelength band λ 2 from interfering with the bidirectional communication, and further reducing the light compared to the conventional one. It is possible to provide an optical transmitting and receiving device with a small number of components at a low price.
【００１２】また、本発明の光送受信装置は、局側と端
末側とを光ファイバで接続し、前記光ファイバを介して
第１の波長帯の光を用いて前記局側と前記端末側との双
方向通信を行い、前記光ファイバを介して第２の波長帯
の光を用いて前記局側から前記端末側への片方向通信を
行い、第３の波長帯の光で光線路保守を行う光波長分割
多重化方式を用いた光通信システムの前記端末側に配置
される光送受信装置であって、前記光ファイバと接続
し、前記第１及び第２及び第３の波長帯の光を伝送する
端末側光ファイバと、前記端末側光ファイバと接続し、
前記端末側光ファイバを介して前記第１の波長帯の光の
送受信を行う双方向通信機能部と、前記第２の波長帯の
光を受光して前記第３の波長帯の光を反射する受光素子
を有し、前記端末側光ファイバを介して前記第２の波長
帯の光の受信を行う片方向通信機能部と、前記第１の波
長帯の光を透過させて前記第２及び第３の波長帯の光を
反射する特性を有し、前記端末側光ファイバで伝送され
る前記第１及び第２及び第３の波長帯の光が当たり、反
射された前記第２及び第３の波長帯の光が前記受光素子
に受光されるように前記端末側光ファイバに配置される
光学部材とを有し、前記受光素子が、前記第３の波長帯
の光が入射される側に前記第３の波長帯の光を反射する
部材を有し、反射された前記第３の波長帯の光が再び前
記光学部材に反射され前記光ファイバを介して局側に伝
送される構成とする。この構成により、光線路保守に用
いられる第３の波長帯λ3の光と片方向通信に用いられ
る第２の波長帯λ2の光とを波長分離することが可能と
なり、さらに従来よりも低価格で部品数の少ない光送受
信装置を提供することが可能となる。Also, the optical transmitting and receiving apparatus of the present invention connects the station side and the terminal side with an optical fiber, and connects the station side and the terminal side using light of a first wavelength band via the optical fiber. And one-way communication from the station side to the terminal side using the light of the second wavelength band via the optical fiber, and maintaining the optical line with the light of the third wavelength band. An optical transmitting and receiving apparatus disposed on the terminal side of an optical communication system using an optical wavelength division multiplexing method, wherein the optical transmitting and receiving apparatus is connected to the optical fiber and transmits light of the first, second, and third wavelength bands. Terminal-side optical fiber for transmission, connected to the terminal-side optical fiber,
A bidirectional communication function unit for transmitting and receiving light in the first wavelength band via the terminal-side optical fiber; and receiving light in the second wavelength band and reflecting light in the third wavelength band. A one-way communication function unit having a light receiving element and receiving light in the second wavelength band via the terminal-side optical fiber; and transmitting the light in the first wavelength band to the second and the second 3 has a characteristic of reflecting light in the third wavelength band, and the light in the first, second, and third wavelength bands transmitted by the terminal-side optical fiber strikes and is reflected by the second and third wavelength bands. An optical member disposed on the terminal-side optical fiber so that light in a wavelength band is received by the light-receiving element, wherein the light-receiving element is disposed on a side on which light in the third wavelength band is incident. A member that reflects light in a third wavelength band, wherein the reflected light in the third wavelength band is reflected back to the optical member; Is a structure to be transmitted to the office side through the optical fiber. By this configuration, it is possible to wavelength separation and the second wavelength band lambda 2 light used in the third light and one-way communication waveband lambda 3 used in the optical line maintenance, even lower than the conventional It is possible to provide an optical transmitting and receiving device with a small number of components at a low price.
【００１３】また、本発明の光送受信装置は、局側と端
末側とを光ファイバで接続し、前記光ファイバを介して
第１の波長帯の光を用いて前記局側と前記端末側との双
方向通信を行い、前記光ファイバを介して第２の波長帯
の光を用いて前記局側から前記端末側への片方向通信を
行い、第３の波長帯の光で光線路保守を行う光波長分割
多重化方式を用いた光通信システムの前記端末側に配置
される光送受信装置であって、前記光ファイバと接続
し、前記第１及び第２及び第３の波長帯の光を伝送する
端末側光ファイバと、前記端末側光ファイバと接続し、
前記端末側光ファイバを介して前記第１の波長帯の光の
送受信を行う双方向通信機能部と、前記第２の波長帯の
光を受光して前記第３の波長帯の光を反射する受光素子
を有し、前記端末側光ファイバを介して前記第２の波長
帯の光の受信を行う片方向通信機能部と、前記第１の波
長帯の光を透過させて前記第２及び第３の波長帯の光を
反射する特性を有し、前記端末側光ファイバで伝送され
る前記第１及び第２及び第３の波長帯の光が当たり、反
射された前記第２及び第３の波長帯の光が前記受光素子
に受光されるように前記端末側光ファイバに配置される
光学部材とを有し、前記受光素子が、前記第３の波長帯
の光が入射される側の反対側に前記第３の波長帯の光を
反射する部材を有し、反射された前記第３の波長帯の光
が再び前記光学部材に反射され前記光ファイバを介して
局側に伝送される構成とする。この構成により、光線路
保守に用いられる第３の波長帯λ3の光と片方向通信に
用いられる第２の波長帯λ2の光とを波長分離し、第３
の波長帯の光を反射する部材が電極の影響を受けないよ
うにすることが可能となり、さらに従来よりも低価格で
部品数の少ない光送受信装置を提供することが可能とな
る。Further, the optical transmitting and receiving apparatus of the present invention connects the station side and the terminal side with an optical fiber, and connects the station side and the terminal side using light of a first wavelength band via the optical fiber. And one-way communication from the station side to the terminal side using the light of the second wavelength band via the optical fiber, and maintaining the optical line with the light of the third wavelength band. An optical transmitting and receiving apparatus disposed on the terminal side of an optical communication system using an optical wavelength division multiplexing method, wherein the optical transmitting and receiving apparatus is connected to the optical fiber and transmits light of the first, second, and third wavelength bands. Terminal-side optical fiber for transmission, connected to the terminal-side optical fiber,
A bidirectional communication function unit for transmitting and receiving light in the first wavelength band via the terminal-side optical fiber; and receiving light in the second wavelength band and reflecting light in the third wavelength band. A one-way communication function unit having a light receiving element and receiving light in the second wavelength band via the terminal-side optical fiber; and transmitting the light in the first wavelength band to the second and the second 3 having the property of reflecting light in the three wavelength bands, and the light in the first, second, and third wavelength bands transmitted by the terminal-side optical fiber hits and is reflected by the second and third wavelength bands. An optical member disposed on the terminal-side optical fiber so that light in a wavelength band is received by the light receiving element, wherein the light receiving element is opposite to a side on which the light in the third wavelength band is incident. A member for reflecting the light of the third wavelength band on the side, and the reflected light of the third wavelength band is again reflected by the optical unit. It is reflected and configured to be transmitted to the office side through the optical fiber. With this configuration, the light of the third wavelength band λ 3 used for optical line maintenance and the light of the second wavelength band λ 2 used for one-way communication are wavelength-separated.
It is possible to prevent a member that reflects light in the above wavelength band from being affected by the electrode, and to provide an optical transmitting / receiving device that is lower in cost and has fewer components than in the past.
【００１４】[0014]
【発明の実施の形態】＜第１の実施の形態＞以下、図面
を用いて本発明に係る実施の形態を説明する。まず、本
発明の光送受信装置に係る第１の実施の形態について説
明する。図１は、第１の波長帯λ1の光で双方向通信を
行い、第２の波長帯λ2の光で局側から端末側への片方
向通信を行う光通信システムにおける本発明の光送受信
装置に係る第１の実施の形態の構成を示す図である。端
末側に設置される光送受信装置１００は、双方向通信を
行うために光を送信又は受信する双方向通信機能部１１
１、片方向通信を行うために光を受信する片方向通信機
能部１１２を有している。片方向通信機能部１１２は光
電変換機能を有し、さらに第２の波長帯λ2の光を反射
するためのλ2受光素子１３１を有している。DESCRIPTION OF THE PREFERRED EMBODIMENTS <First Embodiment> An embodiment according to the present invention will be described below with reference to the drawings. First, a first embodiment according to the optical transceiver of the present invention will be described. FIG. 1 shows an optical communication system according to the present invention in an optical communication system in which bidirectional communication is performed using light in a first wavelength band λ 1 and one-way communication from a station side to a terminal side is performed using light in a second wavelength band λ 2. FIG. 2 is a diagram illustrating a configuration of a first embodiment of a transmission / reception device. The optical transmission / reception device 100 installed on the terminal side transmits or receives light for performing bidirectional communication.
1. It has a one-way communication function unit 112 for receiving light to perform one-way communication. One-way communication function unit 112 has a photoelectric conversion function, also has a lambda 2 light receiving element 131 for reflecting the second wavelength band lambda 2 light.
【００１５】また、光ファイバ１２０は局側と端末側と
を、光ファイバ１２１は光コネクタ１２４と光コネクタ
１２５とを接続する光伝送媒体であり、光コネクタ１２
４は光ファイバ１２０と光ファイバ１２１とを、光コネ
クタ１２５は光ファイバ１２１と双方向通信機能部１１
１とをそれぞれ接続する接続手段である。片方向通信機
能部１１２は、そのλ2受光素子１３１が光ファイバ１
２１の側面に沿うように配置される。The optical fiber 120 is an optical transmission medium for connecting the office side and the terminal side, and the optical fiber 121 is an optical transmission medium for connecting the optical connector 124 and the optical connector 125.
4 is an optical fiber 120 and an optical fiber 121, and an optical connector 125 is an optical fiber 121 and a bidirectional communication function unit 11.
1 is a connecting means for connecting each of them. The one-way communication function unit 112 is configured such that the λ 2 light receiving element 131 is an optical fiber 1
21 are arranged along the side surface.
【００１６】さらに、以下に図１に示された片方向通信
機能部１１２の詳細な構成を示す。図２は、本発明の光
送受信装置に係る第１の実施の形態の詳細な部分構成図
であり、片方向通信機能部１１２と光ファイバ１２１と
が重なる部分である図１の点線で示された円の部分を、
Ａの方向から紙面に平行に見たときの図である。Further, a detailed configuration of the one-way communication function unit 112 shown in FIG. 1 will be described below. FIG. 2 is a detailed partial configuration diagram of the first embodiment of the optical transceiver according to the present invention, which is indicated by a dotted line in FIG. 1 where the one-way communication function unit 112 and the optical fiber 121 overlap. Part of the circle
FIG. 3 is a diagram when viewed in a direction parallel to the plane of FIG.
【００１７】ＷＤＭフィルタ１３２には、双方向通信に
用いられる第１の波長帯λ1の光を透過させ、片方向通
信に用いられる第２の波長帯λ2の光を反射する光学部
材が用いられ、このＷＤＭフィルタ１３２によって反射
された第２の波長帯λ2の光がλ2受光素子１３１に入射
するように、ＷＤＭフィルタ１３２を光ファイバ１２１
に対して斜めに横切るように配置する。このＷＤＭフィ
ルタ１３２には、第１の波長帯λ1の光を透過させ第２
の波長帯λ2の光を反射する光学部材を用いればよい
が、例えばガラス基板上にＴｉＯ2とＳｉＯ2の多層膜や
Ｔａ2Ｏ5とＳｉＯ 2との多層膜を積層した誘電体多層膜
フィルタを用いることが好ましい。The WDM filter 132 has two-way communication.
First wavelength band λ used1Light through the
Wavelength band λ used for transmissionTwoOptical part that reflects light
Material is used and reflected by the WDM filter 132.
Second wavelength band λTwoLight is λTwoIncident on light receiving element 131
The WDM filter 132 is connected to the optical fiber 121 so that
It is arranged so as to cross diagonally to. This WDM file
Filter 132 has a first wavelength band λ1Through the light of the second
Wavelength band λTwoIt is sufficient to use an optical member that reflects light
However, for example, TiOTwoAnd SiOTwoOr multilayer film
TaTwoOFiveAnd SiO TwoDielectric multilayer film laminated with multilayer film
Preferably, a filter is used.
【００１８】この構成により、局側から端末側への片方
向通信に用いられる第２の波長帯λ 2の光は光ファイバ
１２１に入力された後、ＷＤＭフィルタ１３２によって
反射されて、光ファイバ１２１の途中に配置された片方
向通信機能部１１２に入力される。また、局側から端末
側への双方向通信に用いられる第１の波長帯λ1の光は
光ファイバ１２１に入力され、ＷＤＭフィルタ１３２を
通過して双方向通信機能部１１１に入力されるととも
に、端末側から局側への第１の波長帯λ1の光は双方向
通信機能部１１１から光ファイバ１２１に出力され、Ｗ
ＤＭフィルタ１３２を通過して局側に送出される。以上
のように、多重化された第１の波長帯λ1の光と第２の
波長帯λ2の光を分離することが可能となる。With this configuration, one side from the station side to the terminal side can be used.
Wavelength band λ used for bidirectional communication TwoThe light is optical fiber
After being input to 121, the WDM filter 132
One of the light reflected and arranged in the middle of the optical fiber 121
Input to the communication function unit 112. Also, from the station side,
Wavelength band λ used for two-way communication to1The light of
Input to the optical fiber 121 and the WDM filter 132
Is passed through and input to the two-way communication function unit 111.
First wavelength band λ from the terminal side to the station side1Light is bidirectional
Output from the communication function unit 111 to the optical fiber 121,
The signal passes through the DM filter 132 and is sent to the station side. that's all
Multiplexed first wavelength band λ1The light and the second
Wavelength band λTwoCan be separated.
【００１９】＜第２の実施の形態＞次に、本発明に係る
第２の実施の形態について説明する。図３は、図１の構
成を基本とし、第２の波長帯λ2の光を用いた片方向通
信サービスを受けない場合のブロック図を示したもので
ある。この構成では、第２の波長帯λ2の光は、第１の
波長帯λ1の光により双方向通信を行う双方向通信機能
部２１１に入力されてしまい、双方向通信への妨害光と
なる。第２の実施の形態は、第１の実施の形態と同じ構
成であるが、双方向通信機能部１１１の内部に使用され
ている第１の波長帯λ1の光を受信する受光素子が、第
２の波長帯λ2の光を受光しないようにした点が異な
る。<Second Embodiment> Next, a second embodiment according to the present invention will be described. FIG. 3 is a block diagram based on the configuration of FIG. 1 and not receiving a one-way communication service using light in the second wavelength band λ2. In this configuration, the light in the second wavelength band λ 2 is input to the bidirectional communication function unit 211 that performs bidirectional communication using the light in the first wavelength band λ 1 , and light that interferes with the bidirectional communication is generated. Become. The second embodiment has the same configuration as the first embodiment, but a light receiving element for receiving light of the first wavelength band λ 1 used inside the two-way communication function unit 111 includes: The difference is that light of the second wavelength band λ 2 is not received.
【００２０】この第１の波長帯λ1の光を受光し、第２
の波長帯λ2の光を透過させる受光素子は、受光素子の
光吸収層のバンドギャップエネルギーを材質によって変
えることにより実現可能である。通常、長波長帯受光素
子の光吸収層には、第１の波長帯λ1（１．３μｍ帯）
及び第２の波長帯λ2（１．５５μｍ帯）の両方の波長
帯の光を吸収するＩｎＧａＡｓが用いられるが、例えば
この光吸収層にＩｎＧａＡｓＰを用いることによって、
吸収波長端を１．４μｍ付近とすることが可能となり、
第１の波長帯λ1（１．３μｍ帯）の光を受光し、第２
の波長帯λ2（１．５５μｍ帯）の光を透過させる受光
素子が実現可能となる。The light of the first wavelength band λ 1 is received and the second
Receiving element which transmits the wavelength band lambda 2 light can be realized by changing the band gap energy of the light absorbing layer of the light receiving element by the material. Usually, the first wavelength band λ 1 (1.3 μm band) is provided on the light absorbing layer of the long wavelength band light receiving element.
And InGaAs that absorbs light in both wavelength bands of the second wavelength band λ 2 (1.55 μm band) is used. For example, by using InGaAsP for this light absorption layer,
The absorption wavelength end can be set at around 1.4 μm,
Receives light in the first wavelength band λ 1 (1.3 μm band),
A light receiving element that transmits light in the wavelength band λ 2 (1.55 μm band) can be realized.
【００２１】また、この第２の実施の形態を図１に示す
双方向通信機能部１１１に用いれば、λ2受光素子１３
１で反射しきれずに、λ2受光素子１３１を透過してし
まった第２の波長帯λ2の光が存在しても、双方向通信
機能部１１１の内部の受光素子が、完全に第２の波長帯
の光λ1と第２の波長帯λ2の光とを分離する。なお、λ
2受光素子１３１の構成はλ2受光素子３３１ａ又はλ2
受光素子３３１ｂと同一の構成である。FIG. 1 shows the second embodiment.
If used for the bidirectional communication function unit 111, λTwoLight receiving element 13
ΛTwoThrough the light receiving element 131
Second wavelength band λTwoTwo-way communication even when there is light
The light receiving element inside the function part 111 is completely in the second wavelength band.
Light λ1And the second wavelength band λTwoOf light. Note that λ
TwoThe configuration of the light receiving element 131 is λTwoLight receiving element 331a or λTwo
It has the same configuration as the light receiving element 331b.
【００２２】この構成により、仮に片方向通信サービス
を中断し、図３のような横成をとることとなった場合で
も、第２の波長帯λ2の光による双方向通信への妨害を
避けることが可能となる。以上のように、多重化された
第１の波長帯λ1の光と第２の波長帯λ2の光を分離する
ことが可能となる。According to this configuration, even if the one-way communication service is interrupted and the structure shown in FIG. 3 is adopted, it is possible to prevent the light in the second wavelength band λ 2 from interfering with the two-way communication. It becomes possible. As described above, it is possible to separate the multiplexed light of the first wavelength band λ 1 and the light of the second wavelength band λ 2 .
【００２３】次に、本発明に係る第３及び第４の実施の
形態について説明する。図４は、本発明の策３及び第４
の実施の形態における端末側に設置される光送受信装置
の一構成例を示すブロック図である。図４に示すよう
に、局側から端末側に向けて敷設された光ファイバの先
端を光コネクタ３２２によって、端末側に設置される光
送受信装置の光ファイバ３２１に接続する。光ファイバ
３２１の先端には、第１の波長帯λ1の光で双方向通信
を行う双方向通信機能部３１１を光コネクタ３２３によ
り接続し、光ファイバ３２１の途中に、第２の波長帯λ
2の光で局側から端末側への片方向通信を行う片方向通
信機能部３１２を配置する。Next, third and fourth embodiments according to the present invention will be described. FIG. 4 shows solutions 3 and 4 of the present invention.
FIG. 14 is a block diagram illustrating a configuration example of an optical transmission / reception device installed on a terminal side according to the embodiment. As shown in FIG. 4, the tip of an optical fiber laid from the station side to the terminal side is connected to an optical fiber 321 of an optical transmitting / receiving apparatus installed on the terminal side by an optical connector 322. A bidirectional communication function unit 311 for performing bidirectional communication with light of the first wavelength band λ 1 is connected to an end of the optical fiber 321 by an optical connector 323.
A one-way communication function unit 312 for performing one-way communication from the station side to the terminal side with the second light is arranged.
【００２４】＜第３の実施の形態＞次に、本発明に係る
第３の実施の形態について詳細に説明する。図５は、本
発明の光送受信装置に係る第３の実施の形態の詳細な部
分構成図であり、片方向通信機能部３１２と光ファイバ
３２１とが重なる部分である図４の点線で示された円の
部分を、Ｂの方向から紙面に平行に見たときの図であ
る。第３の実施の形態では、図５に示すように、双方向
通信に用いられる第１の波長帯λ1の光を透過させ、片
方向通信に用いられる第２の波長帯λ2の光と光線路保
守に用いられる第３の波長帯λ3（例えば１．６５μｍ
帯）の光を反射するＷＤＭフィルタ３３２を、光ファイ
バ３２１を斜めに横切るように配置し、ＷＤＭフィルタ
３３２によって反射された光を受け取る位置に、光ファ
イバ側の側面に第３の波長帯λ3の光を反射するλ3反射
層３４１aを有し、第２の波長帯λ2の光を受信して光電
変換するλ2受光素子３３１aを配置する。<Third Embodiment> Next, a third embodiment according to the present invention will be described in detail. FIG. 5 is a detailed partial configuration diagram of the third embodiment according to the optical transceiver of the present invention, which is indicated by a dotted line in FIG. 4 where the one-way communication function unit 312 and the optical fiber 321 overlap. FIG. 6 is a diagram when a circled portion is viewed in a direction B and parallel to the paper surface. In the third embodiment, as shown in FIG. 5, light in a first wavelength band λ 1 used for two-way communication is transmitted, and light in a second wavelength band λ 2 used for one-way communication is transmitted. Third wavelength band λ 3 (for example, 1.65 μm
The WDM filter 332 that reflects the light of the third wavelength band λ 3 is disposed at a position where the light reflected by the WDM filter 332 is received at a position where the light reflected by the WDM filter 332 is received. A λ 2 light receiving element 331a that has a λ 3 reflection layer 341a that reflects the light of the second wavelength band λ 2 and receives the light of the second wavelength band λ 2 and performs photoelectric conversion is disposed.
【００２５】この構成により、局側から端末側への片方
向通信に用いられる第２の波長帯λ 2の光は、光ファイ
バ３２１に入力された後、ＷＤＭフィルタ３３２によっ
て反射されて、光ファイバ３２１の途中に配置された片
方向通信機能部３１２に入力される。また、局側から端
末側への双方向通信に用いられる第１の波長帯λ1の光
は光ファイバ３２１に入力され、ＷＤＭフィルタ３３２
を通過して双方向通信機能部３１１に入力されるととも
に、端末側から局側への光は、双方向通信機能部３１１
から光ファイバ３２１に出力されて、ＷＤＭフィルタ３
３２を通過して局側に送出される。また、局側から端末
側への光線路保守に用いられる第３の波長帯λ3の光は
光ファイバ３２１に入力された後、ＷＤＭフィルタ３３
２によって反射され、さらにλ2受光素子３３１aのλ3
反射層３４１aで反射されるとともに、再度ＷＤＭフィ
ルタ３３２によって反射されて、その一部が光ファイバ
３２１に再結合して局側に戻される。以上のように、多
重化された第１の波長帯λ1の光、第２の波長帯λ2の
光、第３の波長帯λ3の光を分離することが可能とな
る。With this configuration, one side from the station side to the terminal side
Wavelength band λ used for bidirectional communication TwoThe light of the optical fiber
After being input to the bar 321, the
Reflected by the optical fiber 321
It is input to the direction communication function unit 312. Also, from the station side to the end
First wavelength band λ used for bidirectional communication to the terminal1Light of
Is input to the optical fiber 321 and the WDM filter 332
Is input to the two-way communication function unit 311 through
The light from the terminal side to the station side is transmitted to the bidirectional communication function unit 311.
Is output to the optical fiber 321 by the WDM filter 3.
It is transmitted to the station side after passing through 32. Also, from the station side,
Wavelength band λ used for optical line maintenance to the sideThreeThe light of
After being input to the optical fiber 321, the WDM filter 33
2 and further reflected by λTwoΛ of the light receiving element 331aThree
While being reflected by the reflective layer 341a, the WDM filter
Part of the optical fiber
321 is recombined and returned to the station side. As mentioned above,
Multiplexed first wavelength band λ1, The second wavelength band λTwoof
Light, third wavelength band λThreeLight can be separated
You.
【００２６】＜第４の実施の形態＞次に、本発明に係る
第４の実施の形態について説明する。図６は、本発明の
光送受信装置に係る第４の実施の形態の詳細な部分構成
図であり、片方向通信機能部３１２と光ファイバ３２１
とが重なる部分である図４の点線で示された円の部分
を、Ｂの方向から紙面に平行に見たときの図である。第
４の実施の形態は、第３の実施の形態と同じ構成である
が、第４の実施の形態の構成は、第３の実施の形態と同
様に、第２の波長帯λ2の光を受光する受光素子３３１
ｂに設けられているが、受光素子３３１ｂの第３の波長
帯λ3の光を反射するλ3受光層３４１ｂが光ファイバ３
２１とは反対の位置にあり、λ2受光素子３３１ｂが第
３の波長帯λ3の光を透過させる特性を有する点が異な
る。この構成により、第４の実施の形態は第３の実施の
形態と同様の効果を有し、さらにλ2受光素子３３１ｂ
上のλ3反射層３４１ｂが電極の影響を受けずに形成可
能であるため、電気的なロスが少なく、第３の実施の形
態の構成よりコストを削減することが可能となる。<Fourth Embodiment> Next, a fourth embodiment according to the present invention will be described. FIG. 6 is a detailed partial configuration diagram of the fourth embodiment according to the optical transceiver of the present invention. The one-way communication function unit 312 and the optical fiber 321 are shown.
FIG. 5 is a diagram of a portion of a circle indicated by a dotted line in FIG. The fourth embodiment has the same configuration as the third embodiment, but the configuration of the fourth embodiment is similar to that of the third embodiment in that the light of the second wavelength band λ 2 Element 331 that receives light
b, the λ 3 light receiving layer 341 b of the light receiving element 331 b that reflects light in the third wavelength band λ 3 is
21 in that the λ 2 light receiving element 331b has the property of transmitting light in the third wavelength band λ 3 . With this configuration, the fourth embodiment has the same effect as the third embodiment, and further has the λ 2 light receiving element 331b
Since the upper λ 3 reflective layer 341b can be formed without being affected by the electrodes, the electric loss is small and the cost can be reduced as compared with the configuration of the third embodiment.
【００２７】[0027]
【発明の効果】以上説明したように、本発明の光送受信
装置は、局側と端末側とを光ファイバで接続し、前記光
ファイバを介して第１の波長帯の光を用いて前記局側と
前記端末側との双方向通信を行い、前記光ファイバを介
して第２の波長帯の光を用いて前記局側から前記端末側
への片方向通信を行う光波長分割多重化方式を用いた光
通信システムの前記端末側に配置される光送受信装置で
あって、前記光ファイバと接続して前記第１及び第２の
波長帯の光を伝送する端末側光ファイバと、前記端末側
光ファイバと接続して前記端末側光ファイバを介して前
記第１の波長帯の光の送受信を行う双方向通信機能部
と、前記第２の波長帯の光を受光する受光素子を有し、
前記端末側光ファイバを介して前記第２の波長帯の光の
受信を行う片方向通信機能部と、前記第１の波長帯の光
を透過させて前記第２の波長帯の光を反射する第１の光
学部材とを有し、前記光学部材で反射された前記第２の
波長帯の光が前記受光素子に受光されるよう、前記端末
側光ファイバに前記第１の光学部材が配置される構成と
するので、双方向通信に用いられる第１の波長帯λ1の
光と片方向通信に用いられる第２の波長帯λ2の光とを
波長分離し、光ファイバを通さずに第２の波長帯λ2の
光を受光素子に入射させ、受光素子入射後に光電変換を
直ちに行うことが可能となり、さらに従来よりも低価格
で部品数の少ない光送受信装置を提供することが可能と
なる。As described above, in the optical transmitting / receiving apparatus of the present invention, the station side and the terminal side are connected by the optical fiber, and the station is used by using the light of the first wavelength band via the optical fiber. Wavelength-division multiplexing method for performing bidirectional communication between a terminal side and the terminal side, and performing one-way communication from the station side to the terminal side using light of a second wavelength band via the optical fiber. An optical transmission / reception device arranged on the terminal side of the used optical communication system, wherein the terminal-side optical fiber is connected to the optical fiber and transmits light in the first and second wavelength bands; A bidirectional communication function unit that connects to an optical fiber and transmits and receives light in the first wavelength band via the terminal-side optical fiber, and a light receiving element that receives light in the second wavelength band;
A one-way communication function unit for receiving the light in the second wavelength band via the terminal-side optical fiber, and transmitting the light in the first wavelength band and reflecting the light in the second wavelength band A first optical member, wherein the first optical member is arranged in the terminal-side optical fiber such that the light of the second wavelength band reflected by the optical member is received by the light receiving element. since a structure that, a second wavelength band lambda 2 light used for the first light and one-way communication wavelength band lambda 1 used for two-way communication with wavelength separation, a not through the optical fiber The light of the second wavelength band λ 2 can be made incident on the light receiving element, and the photoelectric conversion can be performed immediately after the light receiving element is made incident. Further, it is possible to provide an optical transmitting and receiving apparatus with a lower cost and a smaller number of parts than before. Become.
【００２８】また、本発明の光送受信装置は、さらに、
双方向通信機能部の受光素子が、第１の波長帯の光を受
光して第２の波長帯の光を反射する第２の光学部材を有
する構成とするので、双方向通信機能部に第１の波長帯
λ1の光及び第２の波長帯λ2の光の両方が入射した場合
でも、双方向通信機能部の受光素子が第２の波長帯λ 2
の光を反射して第１の波長帯λ1の光のみを処理し、第
２の波長帯λ2の光による双方向通信の妨害を避けるこ
とが可能となり、さらに従来よりも低価格で部品数の少
ない光送受信装置を提供することが可能となる。Further, the optical transceiver of the present invention further comprises:
The light receiving element of the bidirectional communication function unit receives light in the first wavelength band.
A second optical member that reflects light and reflects light in a second wavelength band;
The first wavelength band in the bidirectional communication function unit.
λ1And the second wavelength band λTwoWhen both lights are incident
However, the light receiving element of the bidirectional communication function unit is in the second wavelength band λ Two
Of the first wavelength band λ1Process only the light of the
2 wavelength bands λTwoAvoid interfering with two-way communication
And lower cost and fewer parts than before.
It is possible to provide an optical transmission / reception device that does not have any.
【００２９】また、本発明の光送受信装置は、局側と端
末側とを光ファイバで接続し、前記光ファイバを介して
第１の波長帯の光を用いて前記局側と前記端末側との双
方向通信を行い、前記光ファイバを介して第２の波長帯
の光を用いて前記局側から前記端末側への片方向通信を
行い、第３の波長帯の光で光線路保守を行う光波長分割
多重化方式を用いた光通信システムの前記端末側に配置
される光送受信装置であって、前記光ファイバと接続
し、前記第１及び第２及び第３の波長帯の光を伝送する
端末側光ファイバと、前記端末側光ファイバと接続し、
前記端末側光ファイバを介して前記第１の波長帯の光の
送受信を行う双方向通信機能部と、前記第２の波長帯の
光を受光して前記第３の波長帯の光を反射する受光素子
を有し、前記端末側光ファイバを介して前記第２の波長
帯の光の受信を行う片方向通信機能部と、前記第１の波
長帯の光を透過させて前記第２及び第３の波長帯の光を
反射する特性を有し、前記端末側光ファイバで伝送され
る前記第１及び第２及び第３の波長帯の光が当たり、反
射された前記第２及び第３の波長帯の光が前記受光素子
に受光されるように前記端末側光ファイバに配置される
光学部材とを有し、前記受光素子が、前記第３の波長帯
の光が入射される側に前記第３の波長帯の光を反射する
部材を有し、反射された前記第３の波長帯の光が再び前
記光学部材に反射され前記光ファイバを介して局側に伝
送される構成とするので、光線路保守に用いられる第３
の波長帯λ3の光と片方向通信に用いられる第２の波長
帯λ2の光とを波長分離することが可能となり、さらに
従来よりも低価格で部品数の少ない光送受信装置を提供
することが可能となる。Further, the optical transmitting and receiving apparatus of the present invention connects the station side and the terminal side with an optical fiber, and uses the light of the first wavelength band through the optical fiber to connect the station side and the terminal side. And one-way communication from the station side to the terminal side using the light of the second wavelength band via the optical fiber, and maintaining the optical line with the light of the third wavelength band. An optical transmitting and receiving apparatus disposed on the terminal side of an optical communication system using an optical wavelength division multiplexing method, wherein the optical transmitting and receiving apparatus is connected to the optical fiber and transmits light of the first, second, and third wavelength bands. Terminal-side optical fiber for transmission, connected to the terminal-side optical fiber,
A bidirectional communication function unit for transmitting and receiving light in the first wavelength band via the terminal-side optical fiber; and receiving light in the second wavelength band and reflecting light in the third wavelength band. A one-way communication function unit having a light receiving element and receiving light in the second wavelength band via the terminal-side optical fiber; and transmitting the light in the first wavelength band to the second and the second 3 having the property of reflecting light in the three wavelength bands, and the light in the first, second, and third wavelength bands transmitted by the terminal-side optical fiber hits and is reflected by the second and third wavelength bands. An optical member disposed on the terminal-side optical fiber so that light in a wavelength band is received by the light-receiving element, wherein the light-receiving element is disposed on a side on which light in the third wavelength band is incident. A member that reflects light in a third wavelength band, wherein the reflected light in the third wavelength band is reflected back to the optical member; It is because the structure to be transmitted to the office side through the optical fiber, a third for use in the optical line maintenance
The wavelength of the wavelength band λ 3 and the light of the second wavelength band λ 2 used for one-way communication can be wavelength-separated, and furthermore, an optical transmitting and receiving apparatus with a lower cost and a smaller number of components than the conventional one is provided. It becomes possible.
【００３０】また、本発明の光送受信装置は、局側と端
末側とを光ファイバで接続し、前記光ファイバを介して
第１の波長帯の光を用いて前記局側と前記端末側との双
方向通信を行い、前記光ファイバを介して第２の波長帯
の光を用いて前記局側から前記端末側への片方向通信を
行い、第３の波長帯の光で光線路保守を行う光波長分割
多重化方式を用いた光通信システムの前記端末側に配置
される光送受信装置であって、前記光ファイバと接続
し、前記第１及び第２及び第３の波長帯の光を伝送する
端末側光ファイバと、前記端末側光ファイバと接続し、
前記端末側光ファイバを介して前記第１の波長帯の光の
送受信を行う双方向通信機能部と、前記第２の波長帯の
光を受光して前記第３の波長帯の光を反射する受光素子
を有し、前記端末側光ファイバを介して前記第２の波長
帯の光の受信を行う片方向通信機能部と、前記第１の波
長帯の光を透過させて前記第２及び第３の波長帯の光を
反射する特性を有し、前記端末側光ファイバで伝送され
る前記第１及び第２及び第３の波長帯の光が当たり、反
射された前記第２及び第３の波長帯の光が前記受光素子
に受光されるように前記端末側光ファイバに配置される
光学部材とを有し、前記受光素子が、前記第３の波長帯
の光が入射される側の反対側に前記第３の波長帯の光を
反射する部材を有し、反射された前記第３の波長帯の光
が再び前記光学部材に反射され前記光ファイバを介して
局側に伝送される構成とするので、光線路保守に用いら
れる第３の波長帯λ3の光と片方向通信に用いられる第
２の波長帯λ2の光とを波長分離し、第３の波長帯の光
を反射する部材が電極の影響を受けないようにすること
が可能となり、さらに従来よりも低価格で部品数の少な
い光送受信装置を提供することが可能となる。Further, the optical transmitting / receiving apparatus of the present invention connects the station side and the terminal side with an optical fiber, and connects the station side and the terminal side using light of a first wavelength band via the optical fiber. And one-way communication from the station side to the terminal side using the light of the second wavelength band via the optical fiber, and maintaining the optical line with the light of the third wavelength band. An optical transmitting and receiving apparatus disposed on the terminal side of an optical communication system using an optical wavelength division multiplexing method, wherein the optical transmitting and receiving apparatus is connected to the optical fiber and transmits light of the first, second, and third wavelength bands. Terminal-side optical fiber for transmission, connected to the terminal-side optical fiber,
A bidirectional communication function unit for transmitting and receiving light in the first wavelength band via the terminal-side optical fiber; and receiving light in the second wavelength band and reflecting light in the third wavelength band. A one-way communication function unit having a light receiving element and receiving light in the second wavelength band via the terminal-side optical fiber; and transmitting the light in the first wavelength band to the second and the second 3 having the property of reflecting light in the three wavelength bands, and the light in the first, second, and third wavelength bands transmitted by the terminal-side optical fiber hits and is reflected by the second and third wavelength bands. An optical member disposed on the terminal-side optical fiber so that light in a wavelength band is received by the light receiving element, wherein the light receiving element is opposite to a side on which the light in the third wavelength band is incident. A member for reflecting the light of the third wavelength band on the side, and the reflected light of the third wavelength band is again reflected by the optical unit. Because the reflected and configured to be transmitted to the office side through the optical fiber, the optical line maintenance to a third wavelength band lambda 3 light and one-way communication to a second wavelength band lambda 2 used used It is possible to provide a light transmitting / receiving device that separates light and wavelength so that a member that reflects light in the third wavelength band is not affected by the electrode, and that is lower in cost and has fewer components than in the past. It becomes possible.
【図１】第１の波長帯λ1の光で双方向通信を行い、第
２の波長帯λ2の光で局側から端末側への片方向通信を
行う光通信システムにおける本発明の光送受信装置に係
る第１の実施の形態の構成を示す図FIG. 1 shows an optical communication system according to the present invention in an optical communication system in which bidirectional communication is performed with light of a first wavelength band λ 1 and one-way communication from a station side to a terminal side is performed with light of a second wavelength band λ 2. FIG. 3 is a diagram illustrating a configuration of a first embodiment according to a transmission / reception device.
【図２】本発明の光送受信装置に係る第１の実施の形態
の詳細な部分構成図であり、片方向通信機能部１１２と
光ファイバ１２１とが重なる部分である図１の点線で示
された円の部分を、Ａの方向から紙面に平行に見たとき
の図FIG. 2 is a detailed partial configuration diagram of the first embodiment of the optical transmission / reception device of the present invention, which is indicated by a dotted line in FIG. 1 where a one-way communication function unit 112 and an optical fiber 121 overlap. Figure when the circled part is viewed parallel to the paper from the direction of A.
【図３】図１の構成を基本とし、第２の波長帯λ2の光
を用いた片方向通信サービスを受けない場合のブロック
図FIG. 3 is a block diagram based on the configuration of FIG. 1 and not receiving a one-way communication service using light of a second wavelength band λ 2 ;
【図４】本発明の策３及び第４の実施の形態における端
末側に設置される光送受信装置の一構成例を示すブロッ
ク図FIG. 4 is a block diagram showing a configuration example of an optical transmitting / receiving device installed on a terminal side in solutions 3 and 4 of the present invention;
【図５】本発明の光送受信装置に係る第３の実施の形態
の詳細な部分構成図であり、片方向通信機能部３１２と
光ファイバ３２１とが重なる部分である図４の点線で示
された円の部分を、Ｂの方向から紙面に平行に見たとき
の図FIG. 5 is a detailed partial configuration diagram of a third embodiment according to the optical transceiver of the present invention, which is indicated by a dotted line in FIG. 4 where a one-way communication function unit 312 and an optical fiber 321 overlap each other. View of the circled part viewed parallel to the paper from the direction of B
【図６】本発明の光送受信装置に係る第４の実施の形態
の詳細な部分構成図であり、片方向通信機能部３１２と
光ファイバ３２１とが重なる部分である図４の点線で示
された円の部分を、Ｂの方向から紙面に平行に見たとき
の図FIG. 6 is a detailed partial configuration diagram of a fourth embodiment according to the optical transceiver of the present invention, which is indicated by a dotted line in FIG. 4 where a one-way communication function unit 312 and an optical fiber 321 overlap each other. View of the circled part viewed parallel to the paper from the direction of B
【図７】第１の波長帯λ1の光で双方向通信を行い、第
２の波長帯λ2の光で局側から端末側への片方向通信を
行う光波長分割多重化方式を用いた光通信システムにお
ける従来の光送受信装置の構成を示す図FIG. 7 uses an optical wavelength division multiplexing system in which bidirectional communication is performed with light in a first wavelength band λ 1 and one- way communication is performed from a station side to a terminal side with light in a second wavelength band λ 2 . Diagram showing the configuration of a conventional optical transmitting and receiving apparatus in an optical communication system
１００、２００、３００、４００ 光送受信装置 １１１、２１１、３１１、４１１ 双方向通信機能部 １１２、３１２、４１２ 片方向通信機能部 １２１、２２１、３２１、４２０、４２１、４２５、４
２６ 光ファイバ １２２、１２３、２２２、２２３、３２２、３２３、４
２２、４２３、４２４光コネクタ １３１、３３１、３３１ａ、３３１ｂ λ2受光素子 １３２、３３２ ＷＤＭフィルタ ３４１ａ、３４１ｂ λ3反射層 ４１３ ＷＤＭモジュール100, 200, 300, 400 Optical transmitting / receiving device 111, 211, 311, 411 Two-way communication function unit 112, 312, 412 One-way communication function unit 121, 221, 321, 420, 421, 425, 4
26 Optical fiber 122, 123, 222, 223, 322, 323, 4
22,423,424 optical connector 131,331,331a, 331b λ 2 receiving element 132,332 WDM filter 341a, 341b lambda 3 reflecting layer 413 WDM module
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2H037 BA11 CA37 5K002 AA01 BA02 BA05 BA21 DA42 EA06 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H037 BA11 CA37 5K002 AA01 BA02 BA05 BA21 DA42 EA06
Claims (4)
前記光ファイバを介して第１の波長帯の光を用いて前記
局側と前記端末側との双方向通信を行い、前記光ファイ
バを介して第２の波長帯の光を用いて前記局側から前記
端末側への片方向通信を行う光波長分割多重化方式を用
いた光通信システムの前記端末側に配置される光送受信
装置であって、 前記光ファイバと接続して前記第１及び第２の波長帯の
光を伝送する端末側光ファイバと、 前記端末側光ファイバと接続して前記端末側光ファイバ
を介して前記第１の波長帯の光の送受信を行う双方向通
信機能部と、 前記第２の波長帯の光を受光する受光素子を有し、前記
端末側光ファイバを介して前記第２の波長帯の光の受信
を行う片方向通信機能部と、 前記第１の波長帯の光を透過させて前記第２の波長帯の
光を反射する第１の光学部材とを有し、 前記第１の光学部材で反射された前記第２の波長帯の光
が前記受光素子に受光されるよう、前記端末側光ファイ
バに前記第１の光学部材が配置される光送受信装置。1. An office side and a terminal side are connected by an optical fiber,
The station side and the terminal side perform bidirectional communication using light in a first wavelength band via the optical fiber, and communicate with the station side using light in a second wavelength band via the optical fiber. An optical transmitting and receiving apparatus disposed on the terminal side of an optical communication system using an optical wavelength division multiplexing system that performs one-way communication from the terminal side to the terminal side, wherein A bidirectional communication function unit that transmits and receives light in the first wavelength band via the terminal side optical fiber connected to the terminal side optical fiber and transmitting the light in the second wavelength band; A one-way communication function unit having a light-receiving element for receiving light in the second wavelength band, and receiving light in the second wavelength band via the terminal-side optical fiber; A first optical member that transmits light in the second band and reflects light in the second wavelength band. An optical transmitting and receiving device, wherein the first optical member is arranged in the terminal-side optical fiber such that the light of the second wavelength band reflected by the first optical member is received by the light receiving element. .
素子が、前記第１の波長帯の光を受光して前記第２の波
長帯の光を反射する第２の光学部材を有することを特徴
とする請求項１に記載の光送受信装置。2. The light receiving element of the two-way communication function unit further includes a second optical member that receives the light of the first wavelength band and reflects the light of the second wavelength band. The optical transceiver according to claim 1, wherein:
前記光ファイバを介して第１の波長帯の光を用いて前記
局側と前記端末側との双方向通信を行い、前記光ファイ
バを介して第２の波長帯の光を用いて前記局側から前記
端末側への片方向通信を行い、第３の波長帯の光で光線
路保守を行う光波長分割多重化方式を用いた光通信シス
テムの前記端末側に配置される光送受信装置であって、 前記光ファイバと接続し、前記第１及び第２及び第３の
波長帯の光を伝送する端末側光ファイバと、 前記端末側光ファイバと接続し、前記端末側光ファイバ
を介して前記第１の波長帯の光の送受信を行う双方向通
信機能部と、 前記第２の波長帯の光を受光して前記第３の波長帯の光
を反射する受光素子を有し、前記端末側光ファイバを介
して前記第２の波長帯の光の受信を行う片方向通信機能
部と、 前記第１の波長帯の光を透過させて前記第２及び第３の
波長帯の光を反射する特性を有し、前記端末側光ファイ
バで伝送される前記第１及び第２及び第３の波長帯の光
が当たり、反射された前記第２及び第３の波長帯の光が
前記受光素子に受光されるように前記端末側光ファイバ
に配置される光学部材とを有し、 前記受光素子が、前記第３の波長帯の光が入射される側
に前記第３の波長帯の光を反射する部材を有し、反射さ
れた前記第３の波長帯の光が再び前記光学部材に反射さ
れ前記光ファイバを介して局側に伝送される光送受信装
置。3. The station side and the terminal side are connected by an optical fiber,
The station side and the terminal side perform bidirectional communication using light in a first wavelength band via the optical fiber, and communicate with the station side using light in a second wavelength band via the optical fiber. An optical transmission / reception apparatus disposed on the terminal side of an optical communication system using an optical wavelength division multiplexing system for performing one-way communication from the optical communication apparatus to the terminal side and maintaining an optical line with light in a third wavelength band. A terminal-side optical fiber that connects to the optical fiber and transmits light in the first, second, and third wavelength bands; and a terminal-side optical fiber that connects to the terminal-side optical fiber. A bidirectional communication function unit for transmitting and receiving light in a first wavelength band; a light receiving element for receiving the light in the second wavelength band and reflecting the light in the third wavelength band; A one-way communication function unit that receives light in the second wavelength band via an optical fiber; The first, second, and third wavelength bands transmitted by the terminal-side optical fiber, having a characteristic of transmitting light of one wavelength band and reflecting light of the second and third wavelength bands; And an optical member disposed on the terminal-side optical fiber so that the reflected light in the second and third wavelength bands is received by the light receiving element. A member that reflects the light of the third wavelength band on the side where the light of the third wavelength band is incident, wherein the reflected light of the third wavelength band is reflected by the optical member again; An optical transmission / reception device transmitted to the station side via an optical fiber.
前記光ファイバを介して第１の波長帯の光を用いて前記
局側と前記端末側との双方向通信を行い、前記光ファイ
バを介して第２の波長帯の光を用いて前記局側から前記
端末側への片方向通信を行い、第３の波長帯の光で光線
路保守を行う光波長分割多重化方式を用いた光通信シス
テムの前記端末側に配置される光送受信装置であって、 前記光ファイバと接続し、前記第１及び第２及び第３の
波長帯の光を伝送する端末側光ファイバと、 前記端末側光ファイバと接続し、前記端末側光ファイバ
を介して前記第１の波長帯の光の送受信を行う双方向通
信機能部と、 前記第２の波長帯の光を受光して前記第３の波長帯の光
を反射する受光素子を有し、前記端末側光ファイバを介
して前記第２の波長帯の光の受信を行う片方向通信機能
部と、 前記第１の波長帯の光を透過させて前記第２及び第３の
波長帯の光を反射する特性を有し、前記端末側光ファイ
バで伝送される前記第１及び第２及び第３の波長帯の光
が当たり、反射された前記第２及び第３の波長帯の光が
前記受光素子に受光されるように前記端末側光ファイバ
に配置される光学部材とを有し、 前記受光素子が、前記第３の波長帯の光が入射される側
の反対側に前記第３の波長帯の光を反射する部材を有
し、反射された前記第３の波長帯の光が再び前記光学部
材に反射され前記光ファイバを介して局側に伝送される
光送受信装置。4. The station side and the terminal side are connected by an optical fiber,
The station side and the terminal side perform bidirectional communication using light in a first wavelength band via the optical fiber, and communicate with the station side using light in a second wavelength band via the optical fiber. An optical transmission / reception apparatus disposed on the terminal side of an optical communication system using an optical wavelength division multiplexing system for performing one-way communication from the optical communication apparatus to the terminal side and maintaining an optical line with light in a third wavelength band. A terminal-side optical fiber that connects to the optical fiber and transmits light in the first, second, and third wavelength bands; and a terminal-side optical fiber that connects to the terminal-side optical fiber. A bidirectional communication function unit for transmitting and receiving light in a first wavelength band; a light receiving element for receiving the light in the second wavelength band and reflecting the light in the third wavelength band; A one-way communication function unit that receives light in the second wavelength band via an optical fiber; The first, second, and third wavelength bands transmitted by the terminal-side optical fiber, having a characteristic of transmitting light of one wavelength band and reflecting light of the second and third wavelength bands; And an optical member disposed on the terminal-side optical fiber so that the reflected light in the second and third wavelength bands is received by the light receiving element. A member for reflecting the light of the third wavelength band on a side opposite to a side on which the light of the third wavelength band is incident, and the reflected light of the third wavelength band is again applied to the optical member; An optical transmitting / receiving device that is reflected and transmitted to the station side via the optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001121490A JP2002311308A (en) | 2001-04-19 | 2001-04-19 | Optical transmitting and receiving equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001121490A JP2002311308A (en) | 2001-04-19 | 2001-04-19 | Optical transmitting and receiving equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002311308A true JP2002311308A (en) | 2002-10-23 |
Family
ID=18971350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001121490A Pending JP2002311308A (en) | 2001-04-19 | 2001-04-19 | Optical transmitting and receiving equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002311308A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013177997A1 (en) * | 2012-05-30 | 2013-12-05 | 国家电网公司 | Onu-end optical transceiver chip for monolithic integrated pon system and manufacturing method therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09197177A (en) * | 1996-01-24 | 1997-07-31 | Matsushita Electric Ind Co Ltd | Bidrectional optical module |
| JPH10268158A (en) * | 1997-03-27 | 1998-10-09 | Matsushita Electric Ind Co Ltd | Optical branching filter and optical coupling part |
| JPH11149019A (en) * | 1997-06-25 | 1999-06-02 | Matsushita Electric Ind Co Ltd | Optical transmitting and receiving device and its manufacturing method, and optical semiconductor module |
| JPH11248977A (en) * | 1998-03-05 | 1999-09-17 | Nippon Telegr & Teleph Corp <Ntt> | Optical transmission and reception module |
-
2001
- 2001-04-19 JP JP2001121490A patent/JP2002311308A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09197177A (en) * | 1996-01-24 | 1997-07-31 | Matsushita Electric Ind Co Ltd | Bidrectional optical module |
| JPH10268158A (en) * | 1997-03-27 | 1998-10-09 | Matsushita Electric Ind Co Ltd | Optical branching filter and optical coupling part |
| JPH11149019A (en) * | 1997-06-25 | 1999-06-02 | Matsushita Electric Ind Co Ltd | Optical transmitting and receiving device and its manufacturing method, and optical semiconductor module |
| JPH11248977A (en) * | 1998-03-05 | 1999-09-17 | Nippon Telegr & Teleph Corp <Ntt> | Optical transmission and reception module |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013177997A1 (en) * | 2012-05-30 | 2013-12-05 | 国家电网公司 | Onu-end optical transceiver chip for monolithic integrated pon system and manufacturing method therefor |
| CN103456829A (en) * | 2012-05-30 | 2013-12-18 | 国家电网公司 | Monolithic integration PON (passive optical network) ONU (optical network unit) end optical transceiving chip and manufacturing method thereof |
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