JPH0964821A - Space transmission optical communication equipment - Google Patents
Space transmission optical communication equipmentInfo
- Publication number
- JPH0964821A JPH0964821A JP7214793A JP21479395A JPH0964821A JP H0964821 A JPH0964821 A JP H0964821A JP 7214793 A JP7214793 A JP 7214793A JP 21479395 A JP21479395 A JP 21479395A JP H0964821 A JPH0964821 A JP H0964821A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- light
- optical fiber
- infrared light
- space
- 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
Landscapes
- Optical Communication System (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空間伝送光通信装
置に関し、更に詳しくは、１０ｍ以上離れた光送信装置
と光受信装置の間で空間を介して高速光通信が可能であ
り且つ光送信装置と光受信装置の光軸合せを好適に行う
ことが出来る空間伝送光通信装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spatial transmission optical communication device, and more specifically, it enables high-speed optical communication via a space between an optical transmission device and an optical reception device which are separated by 10 m or more, and can perform optical transmission. The present invention relates to a spatial transmission optical communication device capable of suitably aligning the optical axes of a device and an optical receiving device.
【０００２】[0002]
【従来の技術】従来、１０ｍ以上離れた光送信装置と光
受信装置の間で空間を介して光通信する空間伝送光通信
装置では、伝送信号の周波数帯域が数１０ＭHz程度であ
り、発光素子として波長０．６μｍの可視光を発光する
可視光半導体レーザや波長０．８μｍ〜０．９μｍの近
赤外光を発光する近赤外光発光ダイオードが使用されて
いる。上記可視光半導体レーザの場合、光のコヒーレン
シィが強く、光ビームの広がりが小さいため、光送信装
置と光受信装置の光軸合せを十分に行う必要がある。し
かし、光ビームを視認することができる（赤く見える）
ため、光受信装置側で白いスクリーンを利用して光軸合
せを容易に行うことが出来る。他方、上記近赤外光発光
ダイオードの場合、光のコヒーレンシィが弱く、レンズ
を用いても光ビームが広がってしまうため、光送信装置
と光受信装置の光軸合せは適当でよい。従って、光ビー
ムを視認できないが、特に支障はない。2. Description of the Related Art Conventionally, in a spatial transmission optical communication device in which an optical transmission device and an optical reception device separated by 10 m or more are optically communicated through a space, a frequency band of a transmission signal is about several tens of MHz, and a light emitting element is used. A visible light semiconductor laser that emits visible light having a wavelength of 0.6 μm and a near infrared light emitting diode that emits near infrared light having a wavelength of 0.8 μm to 0.9 μm are used. In the case of the visible light semiconductor laser, since the coherency of light is strong and the spread of the light beam is small, it is necessary to sufficiently align the optical axes of the optical transmitter and the optical receiver. But you can see the light beam (looks red)
Therefore, the optical axis can be easily adjusted by using the white screen on the optical receiver side. On the other hand, in the case of the near-infrared light emitting diode, since the coherency of light is weak and the light beam spreads even if a lens is used, the optical axes of the optical transmitter and the optical receiver may be properly aligned. Therefore, the light beam cannot be visually recognized, but there is no particular problem.
【０００３】[0003]
【発明が解決しようとする課題】近年の通信量の増大傾
向に伴い、伝送信号の周波数帯域を数１００ＭHz〜数Ｇ
Hzに高速化することが必要になってきている。このよう
な高速通信では、発光素子として波長０．８μｍ以上の
赤外光を発光する赤外光半導体レーザを使用する必要が
ある。しかし、赤外光半導体レーザを使用する場合、光
のコヒーレンシィが強く、光ビームの広がりが小さいた
め、光送信装置と光受信装置の光軸合せを十分に行う必
要があるにもかかわらず、光ビームを視認できないた
め、光軸合せを容易に行うことが出来ない問題点があ
る。そこで、本発明の目的は、１０ｍ以上離れた光送信
装置と光受信装置の間で空間を介して高速光通信が可能
であり且つ光送信装置と光受信装置の光軸合せを好適に
行うことが出来る空間伝送光通信装置を提供することに
ある。With the recent trend of increasing communication volume, the frequency band of transmission signals is from several 100 MHz to several G.
It is necessary to speed up to Hz. In such high-speed communication, it is necessary to use an infrared semiconductor laser that emits infrared light having a wavelength of 0.8 μm or more as a light emitting element. However, when the infrared semiconductor laser is used, since the coherency of light is strong and the spread of the light beam is small, it is necessary to sufficiently align the optical axes of the optical transmitter and the optical receiver. Since the light beam cannot be visually recognized, there is a problem that the optical axis cannot be easily aligned. Therefore, an object of the present invention is to enable high-speed optical communication through space between an optical transmitter and an optical receiver that are separated by 10 m or more, and preferably perform optical axis alignment between the optical transmitter and the optical receiver. Another object of the present invention is to provide a spatial transmission optical communication device capable of performing the above.
【０００４】[0004]
【課題を解決するための手段】第１の観点では、本発明
は、１０ｍ以上離れた地点に設置した光受信装置に対し
て空間を介して光信号を送信しうる空間伝送光通信装置
において、波長０．８μｍ以上の赤外光を発光する赤外
光半導体レーザと、可視光を発光する可視光半導体レー
ザと、通信のために前記赤外光半導体レーザを駆動する
通信用駆動手段と、光軸合せのために前記可視光半導体
レーザを駆動する光軸合せ用駆動手段と、前記赤外光と
前記可視光とを１つの光ファイバに導く光ファイバカプ
ラまたは前記赤外光か前記可視光かを選択的に１つの光
ファイバに導く光ファイバスイッチと、前記１つの光フ
ァイバの端部から出射した光を光ビームに形成して前記
空間へ出射するレンズとを具備したことを特徴とする空
間伝送光通信装置を提供する。上記第１の観点による空
間伝送光通信装置では、波長０．８μｍ以上の赤外光を
発光する赤外光半導体レーザを通信のために駆動するた
め、伝送信号の周波数帯域が数１００ＭHz〜数ＧHzの高
速通信が可能である。また、可視光を発光する可視光半
導体レーザを光軸合せのために駆動するため、光軸合せ
を容易に且つ十分に行うことが出来る。さらに、前記赤
外光と前記可視光とを１つの光ファイバに導き、その１
つの光ファイバの端部から出射した光を光ビームに形成
して空間へ出射するため、光学系の構成が簡単になる。According to a first aspect, the present invention provides a spatial transmission optical communication device capable of transmitting an optical signal through a space to an optical receiving device installed at a point separated by 10 m or more, An infrared light semiconductor laser that emits infrared light having a wavelength of 0.8 μm or more, a visible light semiconductor laser that emits visible light, a communication driving unit that drives the infrared light semiconductor laser for communication, and an optical A drive means for optical axis alignment for driving the visible light semiconductor laser for axis alignment, an optical fiber coupler for guiding the infrared light and the visible light into one optical fiber, or the infrared light or the visible light. An optical fiber switch that selectively guides light to one optical fiber, and a lens that forms light emitted from an end of the one optical fiber into a light beam and emits the light beam to the space. Transmission optical communication device To provide. In the space transmission optical communication device according to the first aspect, since the infrared semiconductor laser that emits infrared light having a wavelength of 0.8 μm or more is driven for communication, the frequency band of the transmission signal is several 100 MHz to several GHz. High-speed communication is possible. Further, since the visible light semiconductor laser that emits visible light is driven for optical axis alignment, the optical axis alignment can be performed easily and sufficiently. Further, the infrared light and the visible light are guided to one optical fiber, and
Since the light emitted from the ends of the two optical fibers is formed into a light beam and emitted into the space, the configuration of the optical system is simplified.
【０００５】第２の観点では、この発明は、１０ｍ以上
離れた空間を介して２台を対向させ光信号を相互に送受
信しうる空間伝送光通信装置において、波長０．８μｍ
以上の赤外光を発光する赤外光半導体レーザと、可視光
を発光する可視光半導体レーザと、通信のために前記赤
外光半導体レーザを駆動する通信用駆動手段と、光軸合
せのために前記可視光半導体レーザを駆動する光軸合せ
用駆動手段と、波長０．８μｍ以上の赤外光を電気信号
に変換する赤外光受光手段と、前記赤外光と前記可視光
とを１つの光ファイバに導くと共にその光ファイバの端
部から入射した赤外光を前記赤外光受光手段に導く光フ
ァイバカプラまたは前記赤外光か前記可視光かを選択的
に１つの光ファイバに導くかその光ファイバの端部から
入射した赤外光を前記赤外光受光手段に導く光ファイバ
スイッチと、前記１つの光ファイバの端部から出射した
光を光ビームに形成して前記空間へ出射すると共に前記
空間から入射した光ビームを前記１つの光ファイバの端
部に集光するレンズとを具備したことを特徴とする空間
伝送光通信装置を提供する。上記第２の観点による空間
伝送光通信装置では、波長０．８μｍ以上の赤外光を発
光する赤外光半導体レーザを通信のために駆動するた
め、伝送信号の周波数帯域が数１００ＭHz〜数ＧHzの高
速通信が可能である。また、可視光を発光する可視光半
導体レーザを光軸合せのために駆動するため、光軸合せ
を容易に且つ十分に行うことが出来る。さらに、前記赤
外光と前記可視光とを１つの光ファイバに導き、その１
つの光ファイバの端部から出射した光を光ビームに形成
して空間へ出射すると共に、空間から入射した光ビーム
を前記１つの光ファイバの端部に集光するため、光学系
の構成が簡単になる。According to a second aspect, the present invention provides a space transmission optical communication device capable of transmitting and receiving optical signals with two units facing each other through a space separated by 10 m or more.
Infrared light semiconductor laser emitting the above infrared light, visible light semiconductor laser emitting visible light, communication drive means for driving the infrared light semiconductor laser for communication, for optical axis alignment An optical axis alignment driving means for driving the visible light semiconductor laser, an infrared light receiving means for converting infrared light having a wavelength of 0.8 μm or more into an electric signal, and the infrared light and the visible light An optical fiber coupler that guides the infrared light incident from one end of the optical fiber to the infrared light receiving means or selectively guides the infrared light or the visible light to one optical fiber. Or an optical fiber switch that guides infrared light incident from the end of the optical fiber to the infrared light receiving means, and light emitted from the end of the one optical fiber is formed into a light beam and emitted to the space. And incident from the space Providing space transmission optical communication apparatus characterized by comprising a lens for focusing the beam on the end of said one optical fiber. In the space transmission optical communication device according to the second aspect, since the infrared semiconductor laser that emits infrared light having a wavelength of 0.8 μm or more is driven for communication, the frequency band of the transmission signal is several 100 MHz to several GHz. High-speed communication is possible. Further, since the visible light semiconductor laser that emits visible light is driven for optical axis alignment, the optical axis alignment can be performed easily and sufficiently. Further, the infrared light and the visible light are guided to one optical fiber, and
The light emitted from the end of one optical fiber is formed into a light beam and emitted to the space, and the light beam incident from the space is focused on the end of the one optical fiber, which simplifies the configuration of the optical system. become.
【０００６】第３の観点では、この発明は、上記構成の
空間伝送光通信装置において、前記１つの光ファイバの
端部と前記レンズの間の間隔を前記レンズの前記赤外光
に対する焦点距離に合せたり，前記間隔を前記可視光に
対する焦点距離に合せたりするための間隔調整手段を具
備したことを特徴とする空間伝送光通信装置を提供す
る。波長が異なれば同一のレンズにおける焦点距離が異
なる。このため、異なる焦点距離に対して前記１つの光
ファイバの端部と前記レンズの間の間隔が一定である
と、赤外光と可視光の両方に対して最適の光ビームを形
成することが出来ない。上記第３の観点による空間伝送
光通信装置では、前記１つの光ファイバの端部と前記レ
ンズの間の間隔を調整し、前記レンズの前記赤外光に対
する焦点距離に合せたり，前記可視光に対する焦点距離
に合せたりする。このため、赤外光と可視光の両方に対
して最適の光ビームを形成することが出来る。According to a third aspect of the present invention, in the space transmission optical communication device having the above structure, the distance between the end of the one optical fiber and the lens is set to the focal length of the lens with respect to the infrared light. Provided is a space transmission optical communication device, which is provided with an interval adjusting means for adjusting or adjusting the interval to a focal length for the visible light. Different wavelengths have different focal lengths in the same lens. Therefore, if the distance between the end of the one optical fiber and the lens is constant for different focal lengths, an optimum light beam can be formed for both infrared light and visible light. Can not. In the space transmission optical communication device according to the third aspect, the distance between the end of the one optical fiber and the lens is adjusted to match the focal length of the lens with respect to the infrared light, or with respect to the visible light. Adjust to the focal length. Therefore, it is possible to form an optimal light beam for both infrared light and visible light.
【０００７】第４の観点では、この発明は、上記構成の
空間伝送光通信装置において、前記レンズの前記赤外光
に対する焦点距離を前記１つの光ファイバの端部と前記
レンズの間の間隔に合せたり，前記可視光に対する焦点
距離を前記１つの光ファイバの端部と前記レンズの間の
間隔に合せるための焦点距離調整手段を具備したことを
特徴とする空間伝送光通信装置を提供する。上記第４の
観点による空間伝送光通信装置では、異なる波長に対し
て前記レンズの焦点距離が一定になるように前記レンズ
を調整し、前記赤外光に対する焦点距離を前記１つの光
ファイバの端部と前記レンズの間の間隔に合せたり，前
記可視光に対する焦点距離を前記１つの光ファイバの端
部と前記レンズの間の間隔に合せたりする。このため、
赤外光と可視光の両方に対して最適の光ビームを形成す
ることが出来る。According to a fourth aspect of the present invention, in the spatial transmission optical communication device having the above structure, the focal length of the lens with respect to the infrared light is set to a distance between the end of the one optical fiber and the lens. Also, there is provided a spatial transmission optical communication device characterized by comprising focal length adjusting means for adjusting the focal length for the visible light to the distance between the end of the one optical fiber and the lens. In the spatial transmission optical communication device according to the fourth aspect, the lens is adjusted so that the focal length of the lens is constant for different wavelengths, and the focal length for the infrared light is set to the end of the one optical fiber. The distance between the lens and the lens, and the focal length for the visible light is adjusted to the distance between the end of the one optical fiber and the lens. For this reason,
Optimal light beams can be formed for both infrared light and visible light.
【０００８】[0008]
【発明の実施の形態】以下、図に示す実施の形態により
本発明をさらに詳細に説明する。なお、これにより本発
明が限定されるものではない。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. The present invention is not limited to this.
【０００９】−第１の実施形態− 図１は、本発明の第１の実施形態の空間伝送光通信装置
１００Ａを示す構成図である。この空間伝送光通信装置
１００Ａは、波長１．３１μｍまたは１．５５μｍの近
赤外光を発光する近赤外光半導体レーザ１１と、波長
０．６６μｍの赤色光を発光する高出力の可視光半導体
レーザ１２と、伝送信号の周波数帯域が数１００ＭHz〜
数ＧHzの高速通信のために前記近赤外光半導体レーザ１
１を駆動する通信用駆動回路１３と、光軸合せのために
前記可視光半導体レーザ１２を駆動する光軸合せ用駆動
回路１４と、前記近赤外光を第１光ファイバ１５ｃで第
３光ファイバ１５ｏに導くと共に前記赤色光を第２光フ
ァイバ１５ｐで前記第３光ファイバ１５ｏに導く光ファ
イバカプラ１５と、前記第３光ファイバ１５ｏの端部に
取り付けられた光コネクタ１６と、その光コネクタ１６
を支持すると共に当該光コネクタ１６の位置を前後に調
整可能な微調台１７と、前記第３光ファイバ１５ｏの端
部から出射された近赤外光および可視光を平行な光ビー
ムＬに形成するためのレンズ１８とを具備して構成され
る。Ｓｃは、通信用駆動信号である。また、Ｓｐは、光
軸合せ用駆動信号である。First Embodiment FIG. 1 is a block diagram showing a spatial transmission optical communication device 100A according to a first embodiment of the present invention. This spatial transmission optical communication device 100A includes a near-infrared light semiconductor laser 11 that emits near-infrared light having a wavelength of 1.31 μm or 1.55 μm, and a high-output visible light semiconductor that emits red light having a wavelength of 0.66 μm. Laser 12 and transmission signal frequency band is several hundred MHz
Near-infrared semiconductor laser 1 for high-speed communication of several GHz
1, a communication drive circuit 13 for driving the optical axis 1, an optical axis alignment drive circuit 14 for driving the visible light semiconductor laser 12 for optical axis alignment, and the near-infrared light through the first optical fiber 15c as a third light beam. An optical fiber coupler 15 that guides the red light to the third optical fiber 15o through the second optical fiber 15p while guiding the red light to the fiber 15o, an optical connector 16 attached to the end of the third optical fiber 15o, and its optical connector. 16
And a near-infrared light and a visible light emitted from the end of the third optical fiber 15o are formed into a parallel light beam L. And a lens 18 for Sc is a communication drive signal. Further, Sp is a drive signal for optical axis alignment.
【００１０】図２は、上記空間伝送光通信装置１００Ａ
から出射される光ビームＬを受光する光受信装置１００
Ｂと光軸合せに使用するスクリーン板５を示す構成図で
ある。この光受信装置１００Ｂは、赤外光を電気信号に
変換する受光素子３１と、前記電気信号を増幅する増幅
回路３２と、端部から入射した赤外光を前記受光素子３
１に導く光ファイバ３３と、その光ファイバ３３の端部
に取り付けられた光コネクタ３４と、その光コネクタ３
４を支持すると共に当該光コネクタ３４の位置を前後に
調整可能な微調台３５と、前記光ビームＬを前記光ファ
イバ３３の端部に集光するためのレンズ３６とを具備し
て構成される。Ｓｒは、受信信号である。前記スクリー
ン板５は、上記光受信装置１００Ｂの前面に着脱可能な
白色板であり、図４に示すように、ターゲットマーク５
１が描かれている。FIG. 2 shows the spatial transmission optical communication device 100A.
Optical receiver 100 for receiving a light beam L emitted from
It is a block diagram which shows the screen board 5 used for B and an optical axis alignment. This optical receiving device 100B includes a light receiving element 31 that converts infrared light into an electric signal, an amplifier circuit 32 that amplifies the electric signal, and infrared light that enters from an end portion of the light receiving element 3.
1, an optical fiber 33 that leads to the optical fiber 1, an optical connector 34 attached to the end of the optical fiber 33, and an optical connector 3 thereof.
4, a fine adjustment table 35 that can adjust the position of the optical connector 34 back and forth, and a lens 36 that focuses the light beam L on the end of the optical fiber 33. . Sr is a received signal. The screen plate 5 is a white plate that can be attached to and detached from the front surface of the optical receiving device 100B. As shown in FIG.
1 is drawn.
【００１１】図３および図４は、上記空間伝送光通信装
置１００Ａと上記光受信装置１００Ｂの光軸合せ時の説
明図である。空間伝送光通信装置１００Ａでは、光軸合
せ用駆動信号Ｓｐを光軸合せ用駆動回路１４に印加し、
可視光半導体レーザ１２から赤色光を発光させる。ま
た、微調台１７により第３光ファイバ１５ｏの端部とレ
ンズ１８の間の間隔を調整し、赤色光に対するレンズ１
８の焦点距離に合せ、赤色光ビームＬｐを空間に出射さ
せる。他方、光受信装置１００Ｂでは、スクリーン板５
を前面に装着する。そして、スクリーン板５に赤色光ビ
ームＬｐが適正に当たるように、空間伝送光通信装置１
００Ａおよび／または光受信装置１００Ｂの位置や向き
を調整する。3 and 4 are explanatory views when the optical axes of the spatial transmission optical communication device 100A and the optical receiving device 100B are aligned. In the spatial transmission optical communication device 100A, the optical axis alignment drive signal Sp is applied to the optical axis alignment drive circuit 14,
The visible light semiconductor laser 12 emits red light. Further, the distance between the end portion of the third optical fiber 15o and the lens 18 is adjusted by the fine adjustment table 17, and the lens 1 for the red light is adjusted.
The red light beam Lp is emitted to the space according to the focal length of 8. On the other hand, in the optical receiver 100B, the screen plate 5
To the front. Then, the spatial transmission optical communication device 1 is arranged so that the red light beam Lp properly strikes the screen plate 5.
00A and / or the position and orientation of the optical receiver 100B are adjusted.
【００１２】図５および図６は、上記空間伝送光通信装
置１００Ａと上記光受信装置１００Ｂの通信時の説明図
である。空間伝送光通信装置１００Ａでは、通信用駆動
信号Ｓｃを通信用駆動回路１３に印加し、近赤外光半導
体レーザ１１から近赤外光を発光させる。また、微調台
１７により第３光ファイバ１５ｏの端部とレンズ１８の
間の間隔を調整し、近赤外光に対するレンズ１８の焦点
距離に合せ、近赤外光ビームＬｃを空間に出射させる。
他方、光受信装置１００Ｂでは、スクリーン板５を前面
から外し、微調台３５により光ファイバ３３の端部とレ
ンズ３６の間の間隔を調整し、近赤外光に対するレンズ
３６の焦点距離に合せる。そして、受信信号Ｓｒをモニ
タして感度が最大になるように空間伝送光通信装置１０
０Ａおよび／または光受信装置１００Ｂの位置や向きを
再調整する。この状態になれば、以後、高速通信を行う
ことが出来る。FIGS. 5 and 6 are explanatory views of the space transmission optical communication device 100A and the optical receiving device 100B during communication. In the spatial transmission optical communication device 100A, the communication drive signal Sc is applied to the communication drive circuit 13, and the near infrared semiconductor laser 11 emits near infrared light. Further, the fine adjustment table 17 adjusts the distance between the end of the third optical fiber 15o and the lens 18 to match the focal length of the lens 18 with respect to the near infrared light and emit the near infrared light beam Lc into the space.
On the other hand, in the optical receiver 100B, the screen plate 5 is removed from the front surface, and the distance between the end of the optical fiber 33 and the lens 36 is adjusted by the fine adjustment table 35 to match the focal length of the lens 36 with respect to near infrared light. Then, the spatial transmission optical communication device 10 is monitored so that the sensitivity is maximized by monitoring the reception signal Sr.
0A and / or the position and orientation of the optical receiver 100B are readjusted. In this state, high speed communication can be performed thereafter.
【００１３】なお、平凸レンズの焦点距離ｆと，球面曲
率ｒと，屈折率ｎとには、 １／ｆ＝（ｎ−１）／ｒ の関係がある。そこで、レンズ１８が平凸レンズであ
り、球面曲率ｒが６２．２８ｍｍであり、波長０．６６
μｍに対して屈折率ｎ＝１．５１４，波長１．３１μｍ
に対して屈折率ｎ＝１．５０４，波長１．５５μｍに対
して屈折率ｎ＝１．５０１の材料からなるものとすれ
ば、波長０．６６μｍに対して焦点距離ｆ＝１２１．１
ｍｍ，波長１．３１μｍに対して焦点距離ｆ＝１２３．
６ｍｍ，波長１．５５μｍに対して焦点距離ｆ＝１２
４．３ｍｍとなる。The focal length f of the plano-convex lens, the spherical curvature r, and the refractive index n have a relationship of 1 / f = (n-1) / r. Therefore, the lens 18 is a plano-convex lens, the spherical curvature r is 62.28 mm, and the wavelength is 0.66.
Refractive index n = 1.514, wavelength 1.31 μm for μm
On the other hand, if a material having a refractive index n = 1.504 and a refractive index n = 1.501 for a wavelength of 1.55 μm is used, the focal length f = 121.1 for a wavelength of 0.66 μm.
mm, wavelength 1.31 μm, focal length f = 123.
6 mm, focal length f = 12 for wavelength 1.55 μm
It becomes 4.3 mm.
【００１４】−第２の実施形態− 図７は、本発明の第２の実施形態の空間伝送光通信装置
２００を示す構成図である。この空間伝送光通信装置２
００は、波長１．３１μｍまたは１．５５μｍの近赤外
光を発光する近赤外光半導体レーザ１１と、波長０．６
６μｍの赤色光を発光する高出力の可視光半導体レーザ
１２と、伝送信号の周波数帯域が数１００ＭHz〜数ＧHz
の高速通信のために前記近赤外光半導体レーザ１１を駆
動する通信用駆動回路１３と、光軸合せのために前記可
視光半導体レーザ１２を駆動する光軸合せ用駆動回路１
４と、赤外光を電気信号に変換する受光素子３１と、前
記電気信号を増幅する増幅回路３２と、前記近赤外光を
１次側第１光ファイバ１９ｃで２次側光ファイバ１９ｏ
に導くと共に前記赤色光を１次側第２光ファイバ１９ｐ
で前記２次側光ファイバ１９ｏに導き且つ２次側光ファ
イバ１９ｏの端部から入射した赤外光を前記受光素子３
１に導く光ファイバカプラ１９と、前記２次側光ファイ
バ１９ｏの端部に取り付けられた光コネクタ１６と、そ
の光コネクタ１６を支持すると共に当該光コネクタ１６
の位置を前後に調整可能な微調台１７と、前記２次側光
ファイバ１９ｏの端部から出射された近赤外光および可
視光を平行な光ビームＬに形成すると共に前記空間から
入射した光ビームＬを前記２次側光ファイバ１９ｏの端
部に集光するためのレンズ１８とを具備して構成され
る。Ｓｃは、通信用駆動信号である。また、Ｓｐは、光
軸合せ用駆動信号である。また、Ｓｒは、受信信号であ
る。微調台１７により２次側光ファイバ１９ｏの端部と
レンズ１８の間の間隔を調整し、近赤外光に対するレン
ズ１８の焦点距離に合せておく。-Second Embodiment- FIG. 7 is a block diagram showing a spatial transmission optical communication device 200 according to a second embodiment of the present invention. This space transmission optical communication device 2
00 is a near infrared light semiconductor laser 11 that emits near infrared light having a wavelength of 1.31 μm or 1.55 μm, and a wavelength of 0.6
A high-power visible light semiconductor laser 12 that emits red light of 6 μm and a transmission signal frequency band of several 100 MHz to several GHz
Communication driving circuit 13 for driving the near-infrared light semiconductor laser 11 for high-speed communication and optical axis alignment drive circuit 1 for driving the visible light semiconductor laser 12 for optical axis alignment.
4, a light receiving element 31 for converting infrared light into an electric signal, an amplifier circuit 32 for amplifying the electric signal, and the near-infrared light by the primary side first optical fiber 19c to the secondary side optical fiber 19o.
To the primary side second optical fiber 19p
Infrared light guided to the secondary side optical fiber 19o and incident from the end of the secondary side optical fiber 19o is received by the light receiving element 3
1, the optical fiber coupler 19, the optical connector 16 attached to the end of the secondary side optical fiber 19o, and the optical connector 16 supporting the optical connector 16
Of the fine adjustment table 17 whose front and rear positions can be adjusted, and the near-infrared light and visible light emitted from the end of the secondary side optical fiber 19o are formed into a parallel light beam L and the light incident from the space And a lens 18 for condensing the beam L on the end portion of the secondary side optical fiber 19o. Sc is a communication drive signal. Further, Sp is a drive signal for optical axis alignment. Further, Sr is a received signal. The distance between the end of the secondary-side optical fiber 19o and the lens 18 is adjusted by the fine adjustment table 17 to match the focal length of the lens 18 with respect to the near infrared light.
【００１５】図８は、前記空間伝送光通信装置２００の
前面に装着する焦点距離調整用アダプタ６の説明図であ
る。この焦点距離調整用アダプタ６のレンズ６１は、こ
のレンズ６１と前記空間伝送光通信装置２００のレンズ
１８とを合成した場合の赤色光に対する焦点距離が、近
赤外光に対するレンズ１８の焦点距離に合致するように
選ばれている。FIG. 8 is an explanatory view of the focal length adjusting adapter 6 mounted on the front surface of the spatial transmission optical communication device 200. In the lens 61 of the focal length adjusting adapter 6, the focal length for red light when the lens 61 and the lens 18 of the spatial transmission optical communication device 200 are combined is the focal length of the lens 18 for near infrared light. Selected to match.
【００１６】図９は、２台の上記空間伝送光通信装置２
００の間の光軸合せ時の説明図である。発光側の空間伝
送光通信装置２００では、光軸合せ用駆動信号Ｓｐを光
軸合せ用駆動回路１４に印加し、可視光半導体レーザ１
２から赤色光を発光させる。また、焦点距離調整用アダ
プタ６を装着し、赤色光ビームＬｐを空間に出射させ
る。他方、受光側の空間伝送光通信装置２００では、ス
クリーン板５を前面に装着する。そして、スクリーン板
５に赤色光ビームＬｐが適正に当たるように、発光側の
空間伝送光通信装置２００および／または受光側の空間
伝送光通信装置２００の位置や向きを調整する。FIG. 9 shows two above-mentioned space transmission optical communication devices 2.
It is explanatory drawing at the time of optical axis alignment between 00. In the light emitting side spatial transmission optical communication device 200, the optical axis alignment drive signal Sp is applied to the optical axis alignment drive circuit 14, and the visible light semiconductor laser 1 is applied.
2 emits red light. Further, the focal length adjusting adapter 6 is attached to emit the red light beam Lp into the space. On the other hand, in the light receiving side spatial transmission optical communication device 200, the screen plate 5 is mounted on the front surface. Then, the position and orientation of the light emitting side spatial transmission optical communication device 200 and / or the light receiving side spatial transmission optical communication device 200 are adjusted so that the red light beam Lp properly strikes the screen plate 5.
【００１７】図１０は、２台の上記空間伝送光通信装置
２００の間の通信時の説明図である。発光側の空間伝送
光通信装置２００では、焦点距離調整用アダプタ６を外
し、通信用駆動信号Ｓｃを通信用駆動回路１３に印加
し、近赤外光半導体レーザ１１から近赤外光を発光さ
せ、近赤外光ビームＬｃを空間に出射させる。他方、受
光側の空間伝送光通信装置２００では、スクリーン板５
を前面から外し、近赤外光ビームＬｃをレンズ３６に入
射させ、受信信号Ｓｒをモニタして感度が最大になるよ
うに発光側の空間伝送光通信装置２００および／または
受光側の空間伝送光通信装置２００の位置や向きを再調
整する。この状態になれば、以後、双方向の高速通信を
行うことが出来る。FIG. 10 is an explanatory diagram at the time of communication between the two space transmission optical communication devices 200. In the light emitting side spatial transmission optical communication device 200, the focal length adjusting adapter 6 is removed, the communication drive signal Sc is applied to the communication drive circuit 13, and the near infrared light semiconductor laser 11 emits near infrared light. , Emits the near infrared light beam Lc into the space. On the other hand, in the spatial transmission optical communication device 200 on the light receiving side, the screen plate 5
Is removed from the front surface, the near-infrared light beam Lc is made incident on the lens 36, the reception signal Sr is monitored, and the spatial transmission optical communication device 200 on the light emitting side and / or the spatial transmission light on the light receiving side is set so as to maximize the sensitivity. Readjust the position and orientation of the communication device 200. In this state, bidirectional high speed communication can be performed thereafter.
【００１８】[0018]
【発明の効果】本発明の空間伝送光通信装置によれば、
１０ｍ以上離れた光送信装置と光受信装置の間で空間を
介して高速光通信が可能であり且つ光送信装置と光受信
装置の光軸合せを好適に行うことが出来る。According to the spatial transmission optical communication device of the present invention,
High-speed optical communication is possible between the optical transmitter and the optical receiver separated by 10 m or more via a space, and the optical axes of the optical transmitter and the optical receiver can be suitably aligned.
【図１】本発明の第１の実施形態の空間伝送光通信装置
を示す構成図である。FIG. 1 is a configuration diagram showing a spatial transmission optical communication device according to a first embodiment of the present invention.
【図２】光受信装置とスクリーン板を示す構成図であ
る。FIG. 2 is a configuration diagram showing an optical receiving device and a screen plate.
【図３】光軸合せ時の説明図である。FIG. 3 is an explanatory diagram for optical axis alignment.
【図４】光軸合せ時の斜視図である。FIG. 4 is a perspective view at the time of optical axis alignment.
【図５】通信時の説明図である。FIG. 5 is an explanatory diagram during communication.
【図６】通信時の斜視図である。FIG. 6 is a perspective view during communication.
【図７】本発明の第２の実施形態の空間伝送光通信装置
を示す構成図である。FIG. 7 is a configuration diagram showing a spatial transmission optical communication device according to a second embodiment of the present invention.
【図８】焦点距離調整用アダプタの構成図である。FIG. 8 is a configuration diagram of a focal length adjustment adapter.
【図９】光軸合せ時の斜視図である。FIG. 9 is a perspective view at the time of optical axis alignment.
【図１０】通信時の斜視図である。FIG. 10 is a perspective view during communication.
５ スクリーン ６ 焦点距離調整用アダプタ １１ 近赤外光半導体レーザ １２ 可視光半導体レーザ １３ 通信用駆動回路 １４ 光軸合せ用駆動回路 １５，１９ 光ファイバカプラ １６ 光コネクタ １７，３５ 微調台 １８，３６，６１ レンズ ３１ 受光素子 ３２ 増幅回路 ３３ 光ファイバ ３４ 光コネクタ １００Ａ，２００ 空間伝送光通信装置 １００Ｂ 光受信装置 5 Screen 6 Focal length adjustment adapter 11 Near infrared semiconductor laser 12 Visible semiconductor laser 13 Communication drive circuit 14 Optical axis alignment drive circuit 15,19 Optical fiber coupler 16 Optical connector 17,35 Fine adjustment stage 18,36, 61 lens 31 light receiving element 32 amplification circuit 33 optical fiber 34 optical connector 100A, 200 spatial transmission optical communication device 100B optical receiving device
Claims (4)
装置に対して空間を介して光信号を送信しうる空間伝送
光通信装置において、 波長０．８μｍ以上の赤外光を発光する赤外光半導体レ
ーザと、可視光を発光する可視光半導体レーザと、通信
のために前記赤外光半導体レーザを駆動する通信用駆動
手段と、光軸合せのために前記可視光半導体レーザを駆
動する光軸合せ用駆動手段と、前記赤外光と前記可視光
とを１つの光ファイバに導く光ファイバカプラまたは前
記赤外光か前記可視光かを選択的に１つの光ファイバに
導く光ファイバスイッチと、前記１つの光ファイバの端
部から出射した光を光ビームに形成して前記空間へ出射
するレンズとを具備したことを特徴とする空間伝送光通
信装置。1. A spatial transmission optical communication device capable of transmitting an optical signal through a space to an optical receiving device installed at a point separated by 10 m or more, wherein infrared light emitting infrared light having a wavelength of 0.8 μm or more. Optical semiconductor laser, visible light semiconductor laser emitting visible light, communication driving means for driving the infrared light semiconductor laser for communication, light for driving the visible light semiconductor laser for optical axis alignment An axis alignment driving means, an optical fiber coupler for guiding the infrared light and the visible light into one optical fiber, or an optical fiber switch for selectively guiding the infrared light or the visible light into one optical fiber And a lens which forms light emitted from an end of the one optical fiber into a light beam and emits the light beam into the space.
向させ光信号を相互に送受信しうる空間伝送光通信装置
において、 波長０．８μｍ以上の赤外光を発光する赤外光半導体レ
ーザと、可視光を発光する可視光半導体レーザと、通信
のために前記赤外光半導体レーザを駆動する通信用駆動
手段と、光軸合せのために前記可視光半導体レーザを駆
動する光軸合せ用駆動手段と、波長０．８μｍ以上の赤
外光を電気信号に変換する赤外光受光手段と、前記赤外
光と前記可視光とを１つの光ファイバに導くと共にその
光ファイバの端部から入射した赤外光を前記赤外光受光
手段に導く光ファイバカプラまたは前記赤外光か前記可
視光かを選択的に１つの光ファイバに導くかその光ファ
イバの端部から入射した赤外光を前記赤外光受光手段に
導く光ファイバスイッチと、前記１つの光ファイバの端
部から出射した光を光ビームに形成して前記空間へ出射
すると共に前記空間から入射した光ビームを前記１つの
光ファイバの端部に集光するレンズとを具備したことを
特徴とする空間伝送光通信装置。2. In a space transmission optical communication device capable of transmitting and receiving optical signals with two units facing each other through a space separated by 10 m or more, an infrared semiconductor laser emitting infrared light having a wavelength of 0.8 μm or more. A visible light semiconductor laser that emits visible light, a communication drive means that drives the infrared light semiconductor laser for communication, and an optical axis alignment that drives the visible light semiconductor laser for optical axis alignment Driving means, infrared light receiving means for converting infrared light having a wavelength of 0.8 μm or more into an electric signal, the infrared light and the visible light are guided to one optical fiber, and from the end of the optical fiber. An optical fiber coupler that guides the incident infrared light to the infrared light receiving means or an infrared light that selectively guides the infrared light or the visible light to one optical fiber or enters from the end of the optical fiber. To guide the infrared light to the infrared light receiving means. An iva switch and a lens that forms a light beam emitted from the end portion of the one optical fiber into a light beam and emits the light beam into the space, and collects the light beam incident from the space at the end portion of the one optical fiber. A spatial transmission optical communication device comprising:
送光通信装置において、前記１つの光ファイバの端部と
前記レンズの間の間隔を前記レンズの前記赤外光に対す
る焦点距離に合せたり，前記間隔を前記可視光に対する
焦点距離に合せたりするための間隔調整手段を具備した
ことを特徴とする空間伝送光通信装置。3. The space transmission optical communication device according to claim 1, wherein the distance between the end of the one optical fiber and the lens is adjusted to the focal length of the lens with respect to the infrared light. And a space transmission optical communication device comprising a space adjusting means for adjusting the space to a focal length with respect to the visible light.
送光通信装置において、前記レンズの前記赤外光に対す
る焦点距離を前記１つの光ファイバの端部と前記レンズ
の間の間隔に合せたり，前記可視光に対する焦点距離を
前記１つの光ファイバの端部と前記レンズの間の間隔に
合せるための焦点距離調整手段を具備したことを特徴と
する空間伝送光通信装置。4. The spatial transmission optical communication device according to claim 1, wherein a focal length of the lens with respect to the infrared light is adjusted to a distance between an end of the one optical fiber and the lens. In addition, the spatial transmission optical communication device is provided with a focal length adjusting means for adjusting the focal length for the visible light to the distance between the end of the one optical fiber and the lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7214793A JPH0964821A (en) | 1995-08-23 | 1995-08-23 | Space transmission optical communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7214793A JPH0964821A (en) | 1995-08-23 | 1995-08-23 | Space transmission optical communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0964821A true JPH0964821A (en) | 1997-03-07 |
Family
ID=16661629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7214793A Pending JPH0964821A (en) | 1995-08-23 | 1995-08-23 | Space transmission optical communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0964821A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004068746A1 (en) * | 2003-01-31 | 2004-08-12 | Mitsubishi Denki Kabushiki Kaisha | Optical antenna |
| JP2007295050A (en) * | 2006-04-21 | 2007-11-08 | Kddi Corp | Optical receiver |
| JP2008109598A (en) * | 2006-10-27 | 2008-05-08 | Nippon Telegr & Teleph Corp <Ntt> | Optical communication apparatus |
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| CN107870396A (en) * | 2017-09-19 | 2018-04-03 | 广州光束信息技术有限公司 | A kind of space optical coupling device |
| KR20180116548A (en) * | 2017-04-17 | 2018-10-25 | 서강대학교산학협력단 | Monostatic bidrectional focusing and collecting optics system |
-
1995
- 1995-08-23 JP JP7214793A patent/JPH0964821A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004068746A1 (en) * | 2003-01-31 | 2004-08-12 | Mitsubishi Denki Kabushiki Kaisha | Optical antenna |
| US7151882B2 (en) | 2003-01-31 | 2006-12-19 | Mitsubishi Denki Kabushiki Kaisha | Optical antenna |
| JP2007295050A (en) * | 2006-04-21 | 2007-11-08 | Kddi Corp | Optical receiver |
| JP2008109598A (en) * | 2006-10-27 | 2008-05-08 | Nippon Telegr & Teleph Corp <Ntt> | Optical communication apparatus |
| JP4747073B2 (en) * | 2006-10-27 | 2011-08-10 | 日本電信電話株式会社 | Optical communication device |
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| US10331274B2 (en) | 2014-09-18 | 2019-06-25 | Nec Display Solutions, Ltd. | Light source device, electronic blackboard system, and method of controlling light source device |
| KR20180116548A (en) * | 2017-04-17 | 2018-10-25 | 서강대학교산학협력단 | Monostatic bidrectional focusing and collecting optics system |
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