JPH05257081A - Optical transmitter - Google Patents
Optical transmitterInfo
- Publication number
- JPH05257081A JPH05257081A JP4019652A JP1965292A JPH05257081A JP H05257081 A JPH05257081 A JP H05257081A JP 4019652 A JP4019652 A JP 4019652A JP 1965292 A JP1965292 A JP 1965292A JP H05257081 A JPH05257081 A JP H05257081A
- Authority
- JP
- Japan
- Prior art keywords
- light
- prism
- parallel
- optical transmitter
- light emitting
- 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 Elements Other Than Lenses (AREA)
- Optical Communication System (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は空間光伝送用装置に適す
る光送信機に関し、特に複数の発光素子からの信号光を
特定方向に出射する光送信機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transmitter suitable for a device for spatial light transmission, and more particularly to an optical transmitter for emitting signal light from a plurality of light emitting elements in a specific direction.
【0002】[0002]
【従来の技術】従来、空間光伝送用送信機の出力パワー
は、一般に半導体レーザ、発光ダイオード等の発光素子
自体の最大定格出力により制限されている。この光送信
機に発光素子の最大定格を超える光出力が要求される場
合には、波長の相異なる複数の発光素子からの光信号を
波長選択性を有する光学素子、例えば回折格子,誘電体
多層干渉膜等を用いて波長多重する方法や、半導体レー
ザのように偏光特性を有する素子からの光信号を偏光素
子によって偏光多重する方法が、出力パワーの合成法と
して知られている。2. Description of the Related Art Conventionally, the output power of a transmitter for spatial light transmission is generally limited by the maximum rated output of a light emitting element itself such as a semiconductor laser or a light emitting diode. When this optical transmitter is required to have an optical output exceeding the maximum rating of the light emitting element, an optical element having wavelength selectivity for optical signals from a plurality of light emitting elements having different wavelengths, such as a diffraction grating and a dielectric multilayer. A method of wavelength-multiplexing using an interference film or the like, and a method of polarization-multiplexing an optical signal from an element having a polarization characteristic such as a semiconductor laser with a polarizing element are known as output power combining methods.
【0003】[0003]
【発明が解決しようとする課題】上述した従来の光パワ
ー合成法については次に述べる欠点があった。The conventional optical power combining method described above has the following drawbacks.
【0004】第1の波長多重法では、発光素子の発光波
長を自由に選択することが難かしいという問題があっ
た。特に、定められた発光波長を維持するためには、一
般に発光素子の発光波長が温度に依存することから、正
確な温度制御が必要であった。さらに、波長選択性を有
する光学素子を用いるため、光送信機の構成が極めて複
雑となり、装置が大型化するとともに高価になるという
欠点があった。The first wavelength multiplexing method has a problem that it is difficult to freely select the emission wavelength of the light emitting element. In particular, in order to maintain the predetermined emission wavelength, the emission wavelength of the light emitting element generally depends on the temperature, so that accurate temperature control is required. Furthermore, since an optical element having wavelength selectivity is used, the structure of the optical transmitter becomes extremely complicated, and the size of the device becomes large and the cost becomes high.
【0005】また、第2の偏光多重法では、P偏光とS
偏光の多重のみしか行えず、これによって所要の出力パ
ワーを得られないときには更に上記の波長多重法と組み
合わせる必要が生じ、実現性に乏しいという欠点があっ
た。In the second polarization multiplexing method, P-polarized light and S-polarized light are used.
If only the polarization can be multiplexed and the required output power cannot be obtained by this, it is necessary to combine it with the above wavelength multiplexing method, and there is a drawback that the feasibility is poor.
【0006】[0006]
【課題を解決するための手段】本発明の光送信機は、各
々光束を出射するN(Nは複数)個の発光素子と、前記
各々の発光素子からの光束をそれぞれ平行光に変換する
N個のレンズと、前記各々のレンズからの平行光を中心
軸に対称に形成されたN個の入力面からそれぞれ入射す
るとともにN個の出力面から前記入射されたそれぞれの
平行光を相互に平行に出力するプリズムとを備えてい
る。SUMMARY OF THE INVENTION An optical transmitter according to the present invention includes N (N is a plurality) light emitting elements each emitting a light beam, and N converting each light beam from each light emitting element into parallel light. Parallel light from each of the lenses and each of the parallel light from each of the lenses is incident from each of the N input surfaces symmetrically formed about the central axis, and each of the parallel light incident from each of the N output surfaces is parallel to each other. And a prism for outputting to.
【0007】[0007]
【実施例】次に本発明について図面を参照して説明す
る。図1は本発明の一実施例の原理図である。The present invention will be described below with reference to the drawings. FIG. 1 is a principle diagram of an embodiment of the present invention.
【0008】図1の光送信機は、説明を簡単にするため
に、光信号の多重度Nが2の場合を示している。発光素
子1aおよび1bからの出射光は、それぞれレンズ2a
および2bによって平行光に変換され、これらの平行光
はプリズム3の入射面4aおよび4bからそれぞれ垂直
に入射する。プリズム3に入射した入射光(平行光)は
それぞれプリズム3中を進行し、出射面5aおよび5b
からそれぞれ出射して光束6aおよび6bとなる。ここ
で、プリズム3の2つの出射面5aおよび5bのなす頂
角αは、光束6aおよび6bが相互に平行となるように
プリズム3の屈折率nに応じて定められている。従って
光束6aおよび6bはプリズム3から相互に平行に出射
する。The optical transmitter of FIG. 1 shows a case where the multiplicity N of the optical signal is 2 for the sake of simplicity. Light emitted from the light emitting elements 1a and 1b is respectively reflected by the lens 2a.
And 2b are converted into parallel light, and these parallel lights are vertically incident from the incident surfaces 4a and 4b of the prism 3, respectively. Incident light (parallel light) incident on the prism 3 travels through the prism 3 and exits 5a and 5b.
From each of which the light beams 6a and 6b are emitted. Here, the apex angle α formed by the two emission surfaces 5a and 5b of the prism 3 is determined according to the refractive index n of the prism 3 so that the light beams 6a and 6b are parallel to each other. Therefore, the light beams 6a and 6b are emitted from the prism 3 in parallel with each other.
【0009】なお、多重度が2より大きいNの場合に
は、上述の条件でプリズム3の中心軸まわりにN個の入
射面4a〜4nおよび出射面5a〜5nを形成すればよ
い。このように多重度Nを増すことにより、さらに大き
な光送信機出力パワーを得ることができる。また、発光
素子1aおよび1bからの出射光に通信信号で変調をか
けておくことができるのは勿論である。When the multiplicity is N larger than 2, it is sufficient to form N incident surfaces 4a to 4n and emission surfaces 5a to 5n around the central axis of the prism 3 under the above conditions. By increasing the multiplicity N in this way, a larger optical transmitter output power can be obtained. Further, it goes without saying that the light emitted from the light emitting elements 1a and 1b can be modulated by a communication signal.
【0010】[0010]
【発明の効果】以上説明したように本発明は、1個のプ
リズムを用いて複数の光信号を一定方向に指向するよう
に多重するので、構成が極めて簡単であリ、小型・安価
な高出力の光送信機を容易に実現できる効果がある。As described above, according to the present invention, a single prism is used to multiplex a plurality of optical signals so that they are directed in a fixed direction. Therefore, the structure is extremely simple, and the size and cost are high. There is an effect that an output optical transmitter can be easily realized.
【図1】本発明の一実施例の原理図である。FIG. 1 is a principle diagram of an embodiment of the present invention.
1a,1b 発光素子 2a,2b レンズ 3 プリズム 4a,4b 入射面 5a,5b 出射面 6a,6b 光束 1a, 1b Light emitting element 2a, 2b Lens 3 Prism 4a, 4b Incident surface 5a, 5b Emission surface 6a, 6b Luminous flux
Claims (1)
発光素子と、前記各々の発光素子からの光束をそれぞれ
平行光に変換するN個のレンズと、前記各々のレンズか
らの平行光を中心軸に対称に形成されたN個の入力面か
らそれぞれ入射するとともにN個の出力面から前記入射
されたそれぞれの平行光を相互に平行に出力するプリズ
ムとを備えることを特徴とする光送信機。1. N (N is a plurality) light emitting elements that emit light fluxes respectively, N lenses that convert the light fluxes from each of the light emission elements into parallel light, and parallel light from each of the lenses. And prisms for respectively injecting light from the N input surfaces, which are formed symmetrically with respect to the central axis, and outputting the incident parallel lights from the N output surfaces in parallel with each other. Optical transmitter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4019652A JPH05257081A (en) | 1992-02-05 | 1992-02-05 | Optical transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4019652A JPH05257081A (en) | 1992-02-05 | 1992-02-05 | Optical transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05257081A true JPH05257081A (en) | 1993-10-08 |
Family
ID=12005184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4019652A Pending JPH05257081A (en) | 1992-02-05 | 1992-02-05 | Optical transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05257081A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1096294A2 (en) * | 1999-10-28 | 2001-05-02 | Xerox Corporation | Optical element for multiple beam separation control |
WO2013167824A1 (en) * | 2012-05-09 | 2013-11-14 | Archimej Technology | Emission device for emitting a light beam of controlled spectrum |
FR2990582A1 (en) * | 2012-11-20 | 2013-11-15 | Archimej Technology | Light emission device for emitting light beam of controlled spectrum in multispectral imaging apparatus, has optical assembly moving light beams spatially closer together, where light beams propagate in free space from LEDs to assembly |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63132215A (en) * | 1986-11-25 | 1988-06-04 | Mitsubishi Rayon Co Ltd | Projection system for putting plural pieces of luminous flux together into single luminous flux |
JPH02173719A (en) * | 1988-11-04 | 1990-07-05 | Miles Inc | Light transmission type spectorscope |
-
1992
- 1992-02-05 JP JP4019652A patent/JPH05257081A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63132215A (en) * | 1986-11-25 | 1988-06-04 | Mitsubishi Rayon Co Ltd | Projection system for putting plural pieces of luminous flux together into single luminous flux |
JPH02173719A (en) * | 1988-11-04 | 1990-07-05 | Miles Inc | Light transmission type spectorscope |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1096294A2 (en) * | 1999-10-28 | 2001-05-02 | Xerox Corporation | Optical element for multiple beam separation control |
EP1096294A3 (en) * | 1999-10-28 | 2003-12-10 | Xerox Corporation | Optical element for multiple beam separation control |
WO2013167824A1 (en) * | 2012-05-09 | 2013-11-14 | Archimej Technology | Emission device for emitting a light beam of controlled spectrum |
FR2990524A1 (en) * | 2012-05-09 | 2013-11-15 | Archimej Technology | DEVICE FOR TRANSMITTING A CONTROLLED SPECTRUM LIGHT BEAM. |
CN104380065A (en) * | 2012-05-09 | 2015-02-25 | 阿奇麦杰科技公司 | Emission device for emitting light beam of controlled spectrum |
FR2990582A1 (en) * | 2012-11-20 | 2013-11-15 | Archimej Technology | Light emission device for emitting light beam of controlled spectrum in multispectral imaging apparatus, has optical assembly moving light beams spatially closer together, where light beams propagate in free space from LEDs to assembly |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19981013 |