JPH06296056A - Optical transmitter-receiver - Google Patents
Optical transmitter-receiverInfo
- Publication number
- JPH06296056A JPH06296056A JP5081562A JP8156293A JPH06296056A JP H06296056 A JPH06296056 A JP H06296056A JP 5081562 A JP5081562 A JP 5081562A JP 8156293 A JP8156293 A JP 8156293A JP H06296056 A JPH06296056 A JP H06296056A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- light
- receiver
- signal
- demultiplexing means
- 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]
【産業上の利用分野】本発明は、光双方向通信における
光送受信装置に関し、特に受信信号光と送信信号光とを
光増幅する機能を有する光送受信装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transmitter / receiver in optical bidirectional communication, and more particularly to an optical transmitter / receiver having a function of optically amplifying received signal light and transmitted signal light.
【０００２】[0002]
【従来の技術】従来の光増幅機能を有する光送受信装置
の一例を図５に基づいて説明する。2. Description of the Related Art An example of a conventional optical transmitter / receiver having an optical amplification function will be described with reference to FIG.
【０００３】図５において、受信用信号伝送路２０１か
ら伝送された受信信号光は、受信用光合分波器２０２に
て受信用励起用光源２０３からの励起光と合波されて受
信用Ｅｒ添加ファイバ２０４に入射される。受信用Ｅｒ
添加ファイバ２０４では励起光のエネルギーにより受信
信号光が増幅される。増幅された受信信号光は受信用光
フィルタ２０５を通って光受信部２０６に入射され、信
号が検出される。使用されなかった励起光は受信用光フ
ィルタ２０５にて取り除かれる。In FIG. 5, the received signal light transmitted from the receiving signal transmission line 201 is combined with the pumping light from the receiving pumping light source 203 by the receiving optical multiplexer / demultiplexer 202 to add receiving Er. It is incident on the fiber 204. Er for reception
In the doped fiber 204, the received signal light is amplified by the energy of the pumping light. The amplified received signal light passes through the receiving optical filter 205 and is incident on the optical receiver 206, where the signal is detected. The unused excitation light is removed by the reception optical filter 205.
【０００４】また、光送信部２０７から送出される送信
信号光は、送信用光フィルタ２０８を通って送信用Ｅｒ
添加ファイバ２０９に入射される。一方送信用励起用光
源２１０からの励起光は、送信用光合分波器２１１によ
って送信信号光と合波されて送信用Ｅｒ添加ファイバ２
０９に入射される。送信用Ｅｒ添加ファイバ２０９で
は、励起光のエネルギーにより送信信号光が増幅され
る。増幅された送信信号光は送信用光合分波器２１１を
通って送信用信号伝送路２１２に送出される。使用され
なかった励起光は送信用光フィルタ２０８にて取り除か
れる。受信用信号伝送路２０１と送信用信号伝送路２１
２は、光合分波器によって一つの伝送路にまとめられる
場合もある。Further, the transmission signal light transmitted from the optical transmission section 207 passes through the transmission optical filter 208 and the transmission Er.
It is incident on the doped fiber 209. On the other hand, the pumping light from the transmitting pumping light source 210 is multiplexed with the transmitting signal light by the transmitting optical multiplexer / demultiplexer 211, and the transmitting Er-doped fiber 2 is transmitted.
It is incident on 09. In the transmission Er-doped fiber 209, the transmission signal light is amplified by the energy of the pumping light. The amplified transmission signal light is transmitted to the transmission signal transmission line 212 through the transmission optical multiplexer / demultiplexer 211. The unused excitation light is removed by the transmission optical filter 208. Reception signal transmission line 201 and transmission signal transmission line 21
In some cases, the two are combined into one transmission line by an optical multiplexer / demultiplexer.
【０００５】[0005]
【発明が解決しようとする課題】上記のような双方向通
信用の光送受信装置では、受信用の光増幅は低雑音であ
る必要がある。一方それほど高出力である必要はない。
光ファイバアンプのＮＦを小さくするためには、励起光
のパワーを大きくする必要があり、このため高出力の必
要ない受信用の光増幅では増幅に使用されない励起光が
大きく、高性能の光送受信装置を低消費電力で作製する
には限界があった。また、高価な励起用光源を２台使用
するため低価格にて生産することは困難であった。In the optical transceiver for bidirectional communication as described above, the optical amplification for reception needs to have low noise. On the other hand, the output does not have to be so high.
In order to reduce the NF of the optical fiber amplifier, it is necessary to increase the power of the pumping light. Therefore, the pumping light that is not used for amplification is large in the optical amplification for reception that does not require high output, and high-performance optical transmission / reception is possible. There was a limit to the fabrication of the device with low power consumption. Further, since two expensive pumping light sources are used, it is difficult to produce at a low price.
【０００６】本発明は上記従来の光送受信装置の課題を
解決するもので、低消費電力で低価格の光送受信装置を
提供することを目的とする。The present invention solves the above-mentioned problems of the conventional optical transmitter / receiver, and an object thereof is to provide an optical transmitter / receiver with low power consumption and low cost.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記問題点を
解決するために受信側の光増幅で使用されない励起光を
光合分波器を用いて送信側の光増幅に用い、送信側の励
起用光源を用いない構成とする。In order to solve the above problems, the present invention uses pumping light not used in optical amplification on the receiving side for optical amplification on the transmitting side using an optical multiplexer / demultiplexer, and The configuration does not use an excitation light source.
【０００８】[0008]
【作用】この構成を取ることにより、受光側の光増幅の
ＮＦを小さくするために十分に大きな励起光を発生させ
ても、使用されなかった励起光は送信部での光増幅に用
いられるために消費電力に無駄がなく、送信用の励起用
光源を省略できるので低価格の光送受信装置が実現でき
る。With this configuration, even if a sufficiently large pump light is generated to reduce the NF of the light amplification on the light receiving side, the unused pump light is used for the light amplification in the transmitter. In addition, there is no waste in power consumption and the pumping light source for transmission can be omitted, so that a low-cost optical transceiver can be realized.
【０００９】[0009]
（第１の実施例）図１に本発明の請求項１に関する一実
施例の光送受信装置の構成を示す。第１の信号伝送路１
０１は、受信信号光が伝送される伝送路である。第２の
信号伝送路１０２は、送信信号光が伝送される伝送路で
ある。励起用光源１０３は光増幅用の励起光を発生させ
る光源である。光受信部１０４は、受信信号光を受信し
信号を検出する装置である。光送信部１０５は、送信信
号を光信号として送出する装置である。第１のＥｒ添加
ファイバ１０６は、受信信号光を励起光を用いて増幅す
るデバイスである。第２のＥｒ添加ファイバ１０７は、
送信信号光を励起光を用いて増幅するデバイスである。
第１の光合分波器１０８と第２の光合分波器１０９は、
受信信号光と励起光を合分波するデバイスである。第３
の光合分波器１１０は、送信信号光と励起光を合分波す
るデバイスである。光フィルタ１１１は、励起光を吸収
し、以降の伝送路に励起光を伝送させないデバイスであ
る。(First Embodiment) FIG. 1 shows the arrangement of an optical transmitter / receiver according to an embodiment of the present invention. First signal transmission line 1
Reference numeral 01 is a transmission line through which the received signal light is transmitted. The second signal transmission path 102 is a transmission path through which transmission signal light is transmitted. The excitation light source 103 is a light source that generates excitation light for optical amplification. The optical receiver 104 is a device that receives the received signal light and detects the signal. The optical transmitter 105 is a device that sends a transmission signal as an optical signal. The first Er-doped fiber 106 is a device that amplifies received signal light by using pumping light. The second Er-doped fiber 107 is
It is a device that amplifies transmission signal light by using excitation light.
The first optical multiplexer / demultiplexer 108 and the second optical multiplexer / demultiplexer 109 are
It is a device that multiplexes and demultiplexes the received signal light and the excitation light. Third
The optical multiplexer / demultiplexer 110 is a device that multiplexes and demultiplexes the transmission signal light and the pump light. The optical filter 111 is a device that absorbs the excitation light and does not transmit the excitation light to the subsequent transmission lines.
【００１０】以上のように構成された本実施例の光送受
信装置について、以下にその動作を説明する。The operation of the optical transmitter / receiver of this embodiment having the above-described structure will be described below.
【００１１】励起用光源１０３から出射された励起光
は、まず第１の光合分波器１０８を通って第１のＥｒ添
加ファイバ１０６に入射され受信信号光の増幅に用いら
れる。第１のＥｒ添加ファイバ１０６で余った励起光
は、第２の光合分波器１０９、第３の光合分波器１１０
を通って第２のＥｒ添加ファイバ１０７に入射され送信
信号光の増幅に用いられる。第２のＥｒ添加ファイバ１
０７で余った励起光は、光フィルタ１１１に入射されて
吸収され、光送信部１０５には励起光は入射されない。The pumping light emitted from the pumping light source 103 first enters the first Er-doped fiber 106 through the first optical multiplexer / demultiplexer 108 and is used for amplifying the received signal light. Excess pump light in the first Er-doped fiber 106 is supplied to the second optical multiplexer / demultiplexer 109 and the third optical multiplexer / demultiplexer 110.
It is incident on the second Er-doped fiber 107 after passing through and is used for amplification of transmission signal light. Second Er-doped fiber 1
Excessive excitation light at 07 is incident on the optical filter 111 and absorbed, and no excitation light is incident on the optical transmitter 105.
【００１２】第１の信号伝送路１０１から入射された受
信信号光は、第２の光合分波器１０９を通って第１のＥ
ｒ添加ファイバ１０６に入射され励起光によって増幅さ
れる。増幅された受信信号光は、第１の光合分波器１０
８を通って光受信部１０４に入射される。The received signal light incident from the first signal transmission path 101 passes through the second optical multiplexer / demultiplexer 109 to produce the first E signal.
It is incident on the r-doped fiber 106 and is amplified by the excitation light. The amplified received signal light is transmitted to the first optical multiplexer / demultiplexer 10
It is incident on the light receiving unit 104 through the light source 8.
【００１３】光送信部１０５より出射された送信信号光
は、光フィルタ１１１を通って第２のＥｒ添加ファイバ
１０７に入射され励起光によって増幅される。増幅され
た送信信号光は、第３の光合分波器１１０を通って第２
の信号伝送路１０２へ出射される。The transmission signal light emitted from the optical transmission unit 105 passes through the optical filter 111, is incident on the second Er-doped fiber 107, and is amplified by the excitation light. The amplified transmission signal light passes through the third optical multiplexer / demultiplexer 110 to generate the second signal.
The signal is transmitted to the signal transmission path 102.
【００１４】以上の構成及び動作により、受光信号増幅
で用いられなかった励起光を用いて送信信号光を増幅す
ることが可能となる。受信光の受信直前での光増幅で重
要となるのは、低雑音の増幅である。低雑音増幅のため
には多くの励起光を入射する必要があるが、受信直前の
増幅では高出力にする必要はないために、その励起光の
大部分は使用されない。この使用されない励起光を送信
信号光増幅に用いることにより、低雑音の受信光増幅で
ありながら電力を無駄に使用しないので低消費電力で、
かつ送信信号光増幅に専用の励起用光源を必要としない
ので低コストの光送受信装置が実現できる。With the above configuration and operation, it becomes possible to amplify the transmission signal light by using the pumping light that has not been used in the received light signal amplification. Amplification with low noise is important in optical amplification just before reception of received light. A large amount of pumping light needs to be incident for low noise amplification, but most of the pumping light is not used because it is not necessary to have a high output in amplification immediately before reception. By using this unused pumping light for amplification of the transmission signal light, power is not wasted even though it is amplification of the reception light with low noise, so low power consumption,
Moreover, since a dedicated pumping light source is not required for amplifying the transmission signal light, a low-cost optical transceiver can be realized.
【００１５】また、請求項１の構成は、受信信号光の増
幅と送信信号光の増幅を後方励起方式としているため、
上記の利点に加え、受信側増幅と送信側増幅で高利得を
得ることができるという特徴を有する。Further, in the configuration of claim 1, since the amplification of the received signal light and the amplification of the transmission signal light are performed by the backward pumping method,
In addition to the above advantages, there is a feature that a high gain can be obtained by receiving side amplification and transmitting side amplification.
【００１６】なお、本実施例ではＥｒ添加ファイバを用
いたが、Ｐｒ添加ファイバ等の希土類添加ファイバを用
いても同様の効果が得られる。Although the Er-doped fiber is used in this embodiment, the same effect can be obtained by using a rare-earth-doped fiber such as Pr-doped fiber.
【００１７】（第２の実施例）図２に本発明の請求項２
に関する一実施例の光送受信装置の構成を示す。本実施
例の構成については、第１の実施例とほぼ同様であっ
て、それら各部品の接続形態が異なるにとどまるので、
動作とともに説明する。(Second Embodiment) FIG. 2 shows the claim 2 of the present invention.
1 shows a configuration of an optical transmitter / receiver according to an exemplary embodiment. The configuration of this embodiment is almost the same as that of the first embodiment, and the connection form of each of these parts is different.
It will be described together with the operation.
【００１８】本実施例の光送受信装置について、以下に
その動作を説明する。The operation of the optical transmitter / receiver of this embodiment will be described below.
【００１９】励起用光源１０３から出射された励起光
は、まず第１の光合分波器１０８を通って第１のＥｒ添
加ファイバ１０６に入射され受信信号光の増幅に用いら
れる。第１のＥｒ添加ファイバ１０６で余った励起光
は、第２の光合分波器１０９、第３の光合分波器１１０
を通って第２のＥｒ添加ファイバ１０７に入射され送信
信号光の増幅に用いられる。第２のＥｒ添加ファイバ１
０７で余った励起光は、光フィルタ１１１に入射されて
吸収され、第２の信号伝送路１０２には励起光は入射さ
れない。The pumping light emitted from the pumping light source 103 first passes through the first optical multiplexer / demultiplexer 108 and enters the first Er-doped fiber 106 to be used for amplifying the received signal light. Excess pump light in the first Er-doped fiber 106 is supplied to the second optical multiplexer / demultiplexer 109 and the third optical multiplexer / demultiplexer 110.
It is incident on the second Er-doped fiber 107 after passing through and is used for amplification of transmission signal light. Second Er-doped fiber 1
Excessive excitation light at 07 is incident on the optical filter 111 and is absorbed, and no excitation light is incident on the second signal transmission path 102.
【００２０】第１の信号伝送路１０１から入射された受
信信号光は、第２の光合分波器１０９を通って第１のＥ
ｒ添加ファイバ１０６に入射され励起光によって増幅さ
れる。増幅された受信信号光は、第１の光合分波器１０
８を通って光受信部１０４に入射される。The received signal light incident from the first signal transmission line 101 passes through the second optical multiplexer / demultiplexer 109 to produce the first E signal.
It is incident on the r-doped fiber 106 and is amplified by the excitation light. The amplified received signal light is transmitted to the first optical multiplexer / demultiplexer 10
It is incident on the light receiving unit 104 through the light source 8.
【００２１】光送信部１０５より出射された送信信号光
は、第３の光合分波器１１０を通って第２のＥｒ添加フ
ァイバ１０７に入射され励起光によって増幅される。増
幅された送信信号光は、光フィルタ１１１を通って第２
の信号伝送路１０２へ出射される。The transmission signal light emitted from the optical transmission unit 105 passes through the third optical multiplexer / demultiplexer 110, enters the second Er-doped fiber 107, and is amplified by the excitation light. The amplified transmission signal light passes through the optical filter 111 and is sent to the second filter.
The signal is transmitted to the signal transmission path 102.
【００２２】以上の構成及び動作により、第１の実施例
と同様、低消費電力で低コストの光送受信装置を実現で
きる。With the above configuration and operation, it is possible to realize an optical transmitter / receiver with low power consumption and low cost, as in the first embodiment.
【００２３】請求項２の構成は、受信信号光の増幅を後
方励起方式、送信信号光の増幅を前方励起方式としてい
るため、上記の利点に加え、受信側増幅は高利得を得る
ことができ、送信側増幅は低雑音にする事ができるとい
う特徴を有する。According to the second aspect of the present invention, the amplification of the received signal light is performed by the backward pumping method and the amplification of the transmitted signal light is performed by the forward pumping method. Therefore, in addition to the above advantages, the receiving side amplification can obtain a high gain. The amplification on the transmission side has a feature that it can be made to have low noise.
【００２４】なお、本実施例ではＥｒ添加ファイバを用
いたが、Ｐｒ添加ファイバ等の希土類添加ファイバを用
いても同様の効果が得られる。Although the Er-doped fiber is used in this embodiment, the same effect can be obtained by using a rare-earth-doped fiber such as Pr-doped fiber.
【００２５】（第３の実施例）図３に本発明の請求項３
に関する一実施例の光送受信装置の構成を示す。本実施
例の構成は、第１の実施例とほぼ同様であって、それら
各部品の接続形態が異なるにとどまるので、動作ととも
に説明する。(Third Embodiment) FIG. 3 shows a third embodiment of the present invention.
1 shows a configuration of an optical transmitter / receiver according to an exemplary embodiment. The configuration of this embodiment is almost the same as that of the first embodiment, and the connection form of each of these parts is different. Therefore, the operation will be described.
【００２６】図３のように構成された本実施例の光送受
信装置について、以下にその動作を説明する。The operation of the optical transmitter / receiver of this embodiment constructed as shown in FIG. 3 will be described below.
【００２７】励起用光源１０３から出射された励起光
は、まず第１の光合分波器１０８を通って第１のＥｒ添
加ファイバ１０６に入射され受信信号光の増幅に用いら
れる。第１のＥｒ添加ファイバ１０６で余った励起光
は、第２の光合分波器１０９、第３の光合分波器１１０
を通って第２のＥｒ添加ファイバ１０７に入射され送信
信号光の増幅に用いられる。第２のＥｒ添加ファイバ１
０７で余った励起光は、光フィルタ１１１に入射されて
吸収され、光送信部１０５には励起光は入射されない。The pumping light emitted from the pumping light source 103 first enters the first Er-doped fiber 106 through the first optical multiplexer / demultiplexer 108 and is used for amplifying the received signal light. Excess pump light in the first Er-doped fiber 106 is supplied to the second optical multiplexer / demultiplexer 109 and the third optical multiplexer / demultiplexer 110.
It is incident on the second Er-doped fiber 107 after passing through and is used for amplification of transmission signal light. Second Er-doped fiber 1
Excessive excitation light at 07 is incident on the optical filter 111 and absorbed, and no excitation light is incident on the optical transmitter 105.
【００２８】第１の信号伝送路１０１から入射された受
信信号光は、第１の光合分波器１０８を通って第１のＥ
ｒ添加ファイバ１０６に入射され励起光によって増幅さ
れる。増幅された受信信号光は、第２の光合分波器１０
９を通って光受信部１０４に入射される。The received signal light incident from the first signal transmission line 101 passes through the first optical multiplexer / demultiplexer 108 to produce the first E signal.
It is incident on the r-doped fiber 106 and is amplified by the excitation light. The amplified received signal light is sent to the second optical multiplexer / demultiplexer 10
It is incident on the light receiving unit 104 through 9.
【００２９】光送信部１０５より出射された送信信号光
は、光フィルタ１１１を通って第２のＥｒ添加ファイバ
１０７に入射され励起光によって増幅される。増幅され
た送信信号光は、第３の光合分波器１１０を通って第２
の信号伝送路１０２へ出射される。The transmission signal light emitted from the optical transmission unit 105 passes through the optical filter 111, is incident on the second Er-doped fiber 107, and is amplified by the excitation light. The amplified transmission signal light passes through the third optical multiplexer / demultiplexer 110 to generate the second signal.
The signal is transmitted to the signal transmission path 102.
【００３０】以上の構成及び動作により、第１の実施例
と同様、低消費電力で低コストの光送受信装置を実現で
きる。With the above configuration and operation, it is possible to realize an optical transmitter / receiver with low power consumption and low cost, as in the first embodiment.
【００３１】請求項３の構成は、受信信号光の増幅を前
方励起方式、送信信号光の増幅を後方励起方式としてい
るため、上記の利点に加え、受信側増幅は低雑音にする
事ができ、送信側増幅は高利得を得ることができるとい
う特徴を有する。According to the third aspect of the present invention, since the received signal light is amplified by the forward pumping method and the transmitted signal light is amplified by the backward pumping method, the receiving side amplification can be made low noise in addition to the above advantages. The amplification on the transmission side has a feature that a high gain can be obtained.
【００３２】なお、本実施例ではＥｒ添加ファイバを用
いたが、Ｐｒ添加ファイバ等の希土類添加ファイバを用
いても同様の効果が得られる。Although the Er-doped fiber is used in this embodiment, the same effect can be obtained by using a rare-earth-doped fiber such as Pr-doped fiber.
【００３３】（第４の実施例）図４に本発明の請求項４
に関する一実施例の光送受信装置の構成を示す。本実施
例の構成は、第２の実施例とほぼ同様であって、それら
各部品の接続形態が異なるにとどまるので、動作ととも
に説明する。(Fourth Embodiment) FIG. 4 shows a fourth embodiment of the present invention.
1 shows a configuration of an optical transmitter / receiver according to an exemplary embodiment. The configuration of this embodiment is almost the same as that of the second embodiment, and the connection form of each of these parts is different.
【００３４】図４のように構成された本実施例の光送受
信装置について、以下にその動作を説明する。The operation of the optical transmitter / receiver of the present embodiment configured as shown in FIG. 4 will be described below.
【００３５】励起用光源１０３から出射された励起光
は、まず第１の光合分波器１０８を通って第１のＥｒ添
加ファイバ１０６に入射され受信信号光の増幅に用いら
れる。第１のＥｒ添加ファイバ１０６で余った励起光
は、第２の光合分波器１０９、第３の光合分波器１１０
を通って第２のＥｒ添加ファイバ１０７に入射され送信
信号光の増幅に用いられる。第２のＥｒ添加ファイバ１
０７で余った励起光は、光フィルタ１１１に入射されて
吸収され、第２の信号伝送路１０２には励起光は入射さ
れない。The pumping light emitted from the pumping light source 103 first enters the first Er-doped fiber 106 through the first optical multiplexer / demultiplexer 108 and is used for amplifying the received signal light. Excess pump light in the first Er-doped fiber 106 is supplied to the second optical multiplexer / demultiplexer 109 and the third optical multiplexer / demultiplexer 110.
It is incident on the second Er-doped fiber 107 after passing through and is used for amplification of transmission signal light. Second Er-doped fiber 1
Excessive excitation light at 07 is incident on the optical filter 111 and is absorbed, and no excitation light is incident on the second signal transmission path 102.
【００３６】第１の信号伝送路１０１から入射された受
信信号光は、第１の光合分波器１０８を通って第１のＥ
ｒ添加ファイバ１０６に入射され励起光によって増幅さ
れる。増幅された受信信号光は、第２の光合分波器１０
９を通って光受信部１０４に入射される。The received signal light incident from the first signal transmission line 101 passes through the first optical multiplexer / demultiplexer 108 to produce the first E signal.
It is incident on the r-doped fiber 106 and is amplified by the excitation light. The amplified received signal light is sent to the second optical multiplexer / demultiplexer 10
It is incident on the light receiving unit 104 through 9.
【００３７】光送信部１０５より出射された送信信号光
は、第３の光合分波器１１０を通って第２のＥｒ添加フ
ァイバ１０７に入射され励起光によって増幅される。増
幅された送信信号光は、光フィルタ１１１を通って第２
の信号伝送路１０２へ出射される。The transmission signal light emitted from the optical transmission unit 105 passes through the third optical multiplexer / demultiplexer 110, enters the second Er-doped fiber 107, and is amplified by the excitation light. The amplified transmission signal light passes through the optical filter 111 and is sent to the second filter.
The signal is transmitted to the signal transmission path 102.
【００３８】以上の構成及び動作により、第１の実施例
と同様、低消費電力で低コストの光送受信装置を実現で
きる。With the above configuration and operation, it is possible to realize an optical transmitter / receiver with low power consumption and low cost, as in the first embodiment.
【００３９】請求項４の構成は、受信信号光の増幅と送
信信号光の増幅を前方励起方式としているため、上記の
利点に加え、受信側増幅と送信側増幅を低雑音にする事
ができるという特徴を有する。According to the structure of claim 4, since the amplification of the received signal light and the amplification of the transmitted signal light are performed by the forward pumping method, the reception side amplification and the transmission side amplification can be made low noise in addition to the above advantages. It has the feature.
【００４０】なお、本実施例ではＥｒ添加ファイバを用
いたが、Ｐｒ添加ファイバ等の希土類添加ファイバを用
いても同様の効果が得られる。Although the Er-doped fiber is used in this embodiment, the same effect can be obtained by using a rare earth-doped fiber such as Pr-doped fiber.
【００４１】[0041]
【発明の効果】以上述べたところから明らかなように、
本発明は、低雑音の受信光増幅でありながら、低消費電
力、低コストである光送受信装置を実現することを可能
とする。As is apparent from the above description,
INDUSTRIAL APPLICABILITY The present invention makes it possible to realize an optical transmitter / receiver that has low power consumption and low cost while performing reception noise amplification with low noise.
【図１】本発明の請求項１に関する一実施例の光送受信
装置の構成を示すブロック図である。FIG. 1 is a block diagram showing a configuration of an optical transceiver according to an embodiment of claim 1 of the present invention.
【図２】本発明の請求項２に関する一実施例の光送受信
装置の構成を示すブロック図である。FIG. 2 is a block diagram showing a configuration of an optical transceiver according to an embodiment of claim 2 of the present invention.
【図３】本発明の請求項３に関する一実施例の光送受信
装置の構成を示すブロック図である。FIG. 3 is a block diagram showing a configuration of an optical transmitter-receiver according to an embodiment of claim 3 of the present invention.
【図４】本発明の請求項４に関する一実施例の光送受信
装置の構成を示すブロック図である。FIG. 4 is a block diagram showing a configuration of an optical transceiver according to an embodiment of claim 4 of the present invention.
【図５】従来の、送信信号光、受信信号光を増幅する機
能を有する光送受信装置の構成を示すブロック図であ
る。FIG. 5 is a block diagram showing a configuration of a conventional optical transmitter / receiver having a function of amplifying transmitted signal light and received signal light.
１０１ 第１の信号伝送路 １０２ 第２の信号伝送路 １０３ 励起用光源 １０４ 光受信部 １０５ 光送信部 １０６ 第１のＥｒ添加ファイバ １０７ 第２のＥｒ添加ファイバ １０８ 第１の光合分波器 １０９ 第２の光合分波器 １１０ 第３の光合分波器 １１１ 光フィルタ ２０１ 受信用信号伝送路 ２０２ 受信用光合分波器 ２０３ 受信用励起用光源 ２０４ 受信用Ｅｒ添加ファイバ ２０５ 受信用光フィルタ ２０６ 光受信部 ２０７ 光送信部 ２０８ 送信用光フィルタ ２０９ 送信用Ｅｒ添加ファイバ ２１０ 送信用励起用光源 ２１１ 送信用光合分波器 ２１２ 送信用信号伝送路 101 First Signal Transmission Line 102 Second Signal Transmission Line 103 Excitation Light Source 104 Optical Receiver 105 Optical Transmitter 106 First Er-Doped Fiber 107 Second Er-Doped Fiber 108 First Optical Multiplexer / Demultiplexer 109 2 optical multiplexer / demultiplexer 110 third optical multiplexer / demultiplexer 111 optical filter 201 reception signal transmission line 202 reception optical multiplexer / demultiplexer 203 reception excitation light source 204 reception Er-doped fiber 205 reception optical filter 206 optical reception 207 Optical transmitter 208 Optical filter for transmission 209 Er-doped fiber for transmission 210 Excitation light source for transmission 211 Optical multiplexer / demultiplexer for transmission 212 Signal transmission path for transmission
Claims (4)
と、送信信号光を伝送する第２の信号伝送路と、励起光
を発生する励起用光源と、光信号を受信する光受信部
と、光信号を発生する光送信部と、前記励起用光源から
の励起光を用いて前記受信信号光を増幅させる第１の光
ファイバ増幅器と、前記第１の光ファイバ増幅器にて増
幅に用いられなかった励起光を用いて前記送信信号光を
増幅する第２の光ファイバ増幅器と、第１の光合分波手
段と、第２の光合分波手段と、第３の光合分波手段とを
備え、 前記光受信部と前記励起用光源は前記第１の光合分波手
段に接続され、 前記第１の光合分波手段は前記第１の光ファイバ増幅器
に接続され、 前記第１の光ファイバ増幅器は前記第２の光合分波手段
に接続され、 前記第２の光合分波手段は前記第１の信号伝送路と前記
第３の光合分波手段に接続され、 前記第３の光合分波手段は前記第２の信号伝送路と前記
第２の光ファイバ増幅器に接続され、 前記第２の光ファイバ増幅器は前記光送信部に接続され
ていることを特徴とする光送受信装置。1. A first signal transmission line for transmitting received signal light, a second signal transmission line for transmitting transmission signal light, a pumping light source for generating pumping light, and an optical receiver for receiving an optical signal. Section, an optical transmission section that generates an optical signal, a first optical fiber amplifier that amplifies the received signal light by using the pumping light from the pumping light source, and an amplification by the first optical fiber amplifier. A second optical fiber amplifier for amplifying the transmission signal light by using the unused pumping light, a first optical multiplexing / demultiplexing means, a second optical multiplexing / demultiplexing means, and a third optical multiplexing / demultiplexing means The optical receiver and the pumping light source are connected to the first optical multiplexing / demultiplexing means, the first optical multiplexing / demultiplexing means is connected to the first optical fiber amplifier, and the first optical A fiber amplifier is connected to the second optical multiplexing / demultiplexing means, and the second optical multiplexing / demultiplexing means. The first signal transmission path and the third optical multiplexing / demultiplexing means are connected, the third optical multiplexing / demultiplexing means is connected to the second signal transmission path and the second optical fiber amplifier, 2. The optical transmitter / receiver, wherein the optical fiber amplifier 2 is connected to the optical transmitter.
記光送信部を接続し、同時に前記光送信部に代えてその
位置に前記第２の信号伝送路を接続したことを特徴とす
る請求項１記載の光送受信装置。2. The second signal transmission line is connected to the position instead of the second signal transmission line, and at the same time, the second signal transmission line is connected to the position instead of the optical transmission unit. The optical transmitter / receiver according to claim 1.
記光受信部を接続し、前記光受信部に代えてその位置に
前記第１の信号伝送路を接続したことを特徴とする請求
項１記載の光送受信装置。3. The first signal transmission path is connected to the optical receiving section instead of the first signal transmission path, and the first signal transmission path is connected to the position instead of the optical receiving section. The optical transceiver according to claim 1.
記光受信部を接続し、前記光受信部に代えてその位置に
前記第１の信号伝送路を接続したことを特徴とする請求
項２記載の光送受信装置。4. The optical receiving unit is connected to the position instead of the first signal transmission line, and the first signal transmission line is connected to the position instead of the optical receiving unit. The optical transceiver according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5081562A JPH06296056A (en) | 1993-04-08 | 1993-04-08 | Optical transmitter-receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5081562A JPH06296056A (en) | 1993-04-08 | 1993-04-08 | Optical transmitter-receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06296056A true JPH06296056A (en) | 1994-10-21 |
Family
ID=13749738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5081562A Pending JPH06296056A (en) | 1993-04-08 | 1993-04-08 | Optical transmitter-receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06296056A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6043928A (en) * | 1997-06-27 | 2000-03-28 | Lucent Technologies Inc. | Robust multi-wavelength optical fiber communication systems |
| US7941049B2 (en) | 2006-11-29 | 2011-05-10 | Hitachi, Ltd. | Optical transmission apparatus with optical amplifiers |
| JP2016115955A (en) * | 2014-12-11 | 2016-06-23 | 日本電信電話株式会社 | Bidirectional optical amplifier |
-
1993
- 1993-04-08 JP JP5081562A patent/JPH06296056A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6043928A (en) * | 1997-06-27 | 2000-03-28 | Lucent Technologies Inc. | Robust multi-wavelength optical fiber communication systems |
| US7941049B2 (en) | 2006-11-29 | 2011-05-10 | Hitachi, Ltd. | Optical transmission apparatus with optical amplifiers |
| JP2016115955A (en) * | 2014-12-11 | 2016-06-23 | 日本電信電話株式会社 | Bidirectional optical amplifier |
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