JPS6346784A - Led stabilized light source - Google Patents
Led stabilized light sourceInfo
- Publication number
- JPS6346784A JPS6346784A JP61190933A JP19093386A JPS6346784A JP S6346784 A JPS6346784 A JP S6346784A JP 61190933 A JP61190933 A JP 61190933A JP 19093386 A JP19093386 A JP 19093386A JP S6346784 A JPS6346784 A JP S6346784A
- Authority
- JP
- Japan
- Prior art keywords
- light
- output
- led
- single mode
- mode fiber
- 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.)
- Granted
Links
- 239000000835 fiber Substances 0.000 claims abstract description 30
- 230000003287 optical effect Effects 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007526 fusion splicing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、光ファイバや光部品の損失測定、調整等に
用いられる、高出力・高安定な、ＬＥＤ（発光ダイオー
ド）使用の安定化光源に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a stabilized light source using LEDs (light emitting diodes), which has high output and high stability and is used for loss measurement and adjustment of optical fibers and optical components.
従来の技術
ＬＥＤを使用した光源の安定化装置には、従来、フィー
ドフォワード型の温度補償によるものや、ペルチェ素子
などの温調素子を用いてＬＥＤの温度を一定に保つ温度
２Ｉ！ＩＪり型や、ハーフミラ−による光分岐器を用い
てフォワード光（出力光）の−部を分岐してフィードバ
ックするフォワード光フイードバツク型などが知られて
いる。Conventional technology Stabilizing devices for light sources using LEDs have conventionally used feed-forward temperature compensation devices and temperature control devices such as Peltier devices to keep the LED temperature constant. Known are an IJ type and a forward optical feedback type in which a half-mirror optical splitter is used to split a portion of the forward light (output light) and feed it back.
発明が解決しようとする問題点
しかし、フィードフォワード型の温度補償によるもので
は、電源投入直後から光出力が安定するまでに時間を要
すること、使用部品の温度特性を予め知っておかなけれ
ばならないこと、調整か複雑になること、等々の欠点が
ある。Problems to be Solved by the Invention However, with feedforward temperature compensation, it takes time for the optical output to stabilize immediately after power is turned on, and the temperature characteristics of the components used must be known in advance. , the adjustment is complicated, and so on.
また、ペルチェ素子などの温調素子を用いてＬＥＤの温
度を一定に保つようにした温度調節型安定化装置では、
温調素子の温度状態が安定するまでに時間がかかること
、回路が複雑となること、熱容量の大きな構造では消費
電力が大きくなること、製造コストが高いこと等の欠点
を有する。In addition, in a temperature control type stabilization device that uses a temperature control element such as a Peltier element to keep the temperature of the LED constant,
The disadvantages include that it takes time for the temperature state of the temperature control element to stabilize, that the circuit is complicated, that a structure with a large heat capacity increases power consumption, and that manufacturing costs are high.
さらに、フォワード光フイードバツク型のＬＥＤ安定化
光源では、ハーフミラ−による光分岐器を用いているの
で、光学系が複雑で高精度な調心が必要であり、また光
学系の損失も大きいなどの欠点がある。Furthermore, the forward optical feedback type LED stabilized light source uses a half-mirror optical splitter, so the optical system is complex and requires highly accurate alignment, and the optical system also suffers from large losses. There is.
この発明は、電源投入後直ちに安定な光を出力できると
ともに、製造コストが低く、しかも高出力な、ＬＥＤ安
定化光源を提供することを目的とする。An object of the present invention is to provide an LED stabilized light source that can output stable light immediately after power is turned on, has low manufacturing cost, and has high output.
開通点を解決するための手段
この発明によるＬＥＤ安定化光源は、ＬＥＤと、受光器
と、上記ＬＥＤの光を分岐し一方の分岐光を外部に出力
するとともに他方の分岐光を上記受光器に導くシングル
モードファイバカプラと、上記受光器の出力を上記ＬＥ
Ｄの駆動回路にフィードバックするフィードバックルー
プとを備える。Means for Solving the Opening Point The LED stabilized light source according to the present invention includes an LED, a light receiver, and the light of the LED is branched, one branched light is outputted to the outside, and the other branched light is sent to the light receiver. A single mode fiber coupler that guides the output of the optical receiver and the output of the optical receiver
A feedback loop that feeds back to the drive circuit of D is provided.
作 用
ＬＥＤの光はシングルモードファイバカプラにより分岐
され、その一方の分岐光が出力され、他方の分岐光が受
光器に導かれてＬＥＤの駆動回路にフィードバックされ
るので、電源投入後、瞬時に安定な光を出力できる。Operation The light from the LED is split by a single-mode fiber coupler, one branched light is output, and the other branched light is guided to the receiver and fed back to the LED drive circuit, so the power is turned on instantly. Can output stable light.
また、このＬＥＤの光の一部を分岐するためのシングル
モードファイバカプラは、同時に空間フィルタとして機
能する。そのため、モードによる分岐比の影響がなく、
安定化の精度が高い。Moreover, the single mode fiber coupler for branching a part of the light from the LED simultaneously functions as a spatial filter. Therefore, the branching ratio is not affected by the mode,
High stabilization accuracy.
シングルモードファイバカプラは、ハーフミラ−などの
光学系による光分岐器に比較して損失が小さいため、大
きな光出力を得ることができ、また調心等の複雑な調整
が不要であり、構造も筒中で、製造コストも低い。Single-mode fiber couplers have lower loss than optical splitters using optical systems such as half mirrors, so they can obtain large optical outputs, do not require complex adjustments such as alignment, and have a structure that is centered inside the cylinder. And the manufacturing cost is low.
実施例
図において、ＬＥＤ ｌが駆動回路２により駆動されて
光出力を生じる。このＬＥＤ １の出力光は、シングル
モードファイバカプラ３の入射側シングルモードファイ
バ４に入射される。このシングルモードファイバカプラ
３は、２本のシングルモードファイバを、クラッド部を
削り取って隣接させて沿わせたものや融着などによりコ
アを近接させたもので、シングルモードファイバ４に入
射された光が出射側の２本のシングルモードファイバ５
．６に分岐される。シングルモードファイバ５の光は外
部に出力され、シングルモードファイ／へ６の光は受光
器であるＰＤ（フォトダイオード）７に導かれる。In the embodiment diagram, LED l is driven by a driving circuit 2 to produce a light output. The output light of this LED 1 is input to a single mode fiber 4 on the input side of a single mode fiber coupler 3. This single-mode fiber coupler 3 is made by cutting off the cladding of two single-mode fibers and making them run adjacent to each other, or by fusion splicing the cores of two single-mode fibers so that the light incident on the single-mode fiber 4 are the two single mode fibers 5 on the output side
．． It is branched into 6. The light from the single mode fiber 5 is output to the outside, and the light from the single mode fiber 6 is guided to a PD (photodiode) 7 which is a light receiver.
ＰＤ７の出力信号はまずプリアンプ８で増幅された後、
コンパレータ９に送られ、基準電圧と比較される。その
比較結果として生じたコンパレータ９の出力により駆動
回路２が制御され、ＬＥＤｌの蒙動′屯流が変化させら
れる。こうしてフィードバックループが形成される。The output signal of PD7 is first amplified by preamplifier 8, and then
The voltage is sent to a comparator 9 and compared with a reference voltage. The drive circuit 2 is controlled by the output of the comparator 9 produced as a result of the comparison, and the pulse current of the LED 1 is changed. A feedback loop is thus formed.
したがって、このフィードバックループによってＬＥＤ
１からの光の安定化がなされ、その一部が外部に出力
される光となるので、外部に出力される光が電源投入後
瞬時に安定化する。Therefore, this feedback loop causes the LED
Since the light from 1 is stabilized and a part of it becomes light that is output to the outside, the light that is output to the outside is stabilized instantly after the power is turned on.
また、シングルモードファイバカプラ３の入射側シング
ルモードファイバ４は空間フィルタとして機能するため
、モードによる分岐比への悪影響がなく、安定化の精度
が高まる。さらに、モードによる影響がないことからシ
ングルモードファイバだけでなく、Ｇ Ｉ 、’（’Ｉ
光ファイバや他の光部品にも安定な光を出力できる。し
かも、このシングルモートファイバカプラ３はハーフミ
ラ−等の光学系による光分岐器に比較して損失が小さい
ので、光出力を高出力化できる。さらにシングルモード
ファイバカプラ３は構造も簡単であり３調整箇所もなく
、製造コストも低いという利点がある。Further, since the single mode fiber 4 on the input side of the single mode fiber coupler 3 functions as a spatial filter, there is no adverse effect on the branching ratio due to the mode, and stabilization accuracy is improved. Furthermore, since there is no mode influence, not only single mode fiber but also G I,'('I
Stable light can also be output to optical fibers and other optical components. Furthermore, since the single mote fiber coupler 3 has a smaller loss than an optical splitter using an optical system such as a half mirror, the optical output can be increased. Furthermore, the single mode fiber coupler 3 has the advantage of a simple structure, no adjustment points, and low manufacturing cost.
なお、ＬＥＤＩの光は無偏光なので、シングルモートフ
ァイバカプラ３の分岐比に偏光依存性があってもよい。Note that since LEDI light is non-polarized, the branching ratio of the single-mode fiber coupler 3 may have polarization dependence.
発明の効果
この発明によれば、電源投入直後、瞬時に安定な光を出
力でき、しかも安定化の精度を高めることができるとと
もに光出力の高出力化を［司ることができる。Effects of the Invention According to the present invention, stable light can be instantaneously output immediately after power is turned on, and moreover, stabilization accuracy can be improved, and the optical output can be increased to a high level.
図はこの発明の一実施例のブロック図である。
１・・・ＬＥＤ ２・・・駆動回路３・・
・シングルモードファイバカプラ４・・・入射側シング
ルモードファイバ５．６・・・出力側シングルモードフ
ァイ／へ７・・・ＰＤ ８・・・プリア
ンプ９・・・コンバレータThe figure is a block diagram of an embodiment of the present invention. 1...LED 2...Drive circuit 3...
・Single mode fiber coupler 4...Input side single mode fiber 5.6...Output side single mode fiber/To 7...PD 8...Preamplifier 9...Converter
Claims (1)
方の分岐光を外部に出力するとともに他方の分岐光を上
記受光器に導くシングルモードファイバカプラと、上記
受光器の出力を上記ＬＥＤの駆動回路にフィードバック
するフィードバックループとを備えるＬＥＤ安定化光源
。(1) An LED, a light receiver, a single mode fiber coupler that branches the light from the LED and outputs one branched light to the outside and guides the other branched light to the light receiver, An LED stabilized light source comprising a feedback loop that feeds back to an LED drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19093386A JP2591608B2 (en) | 1986-08-13 | 1986-08-13 | LED stabilized light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19093386A JP2591608B2 (en) | 1986-08-13 | 1986-08-13 | LED stabilized light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6346784A true JPS6346784A (en) | 1988-02-27 |
| JP2591608B2 JP2591608B2 (en) | 1997-03-19 |
Family
ID=16266099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19093386A Expired - Lifetime JP2591608B2 (en) | 1986-08-13 | 1986-08-13 | LED stabilized light source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2591608B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4998043A (en) * | 1989-05-01 | 1991-03-05 | Fujikura Ltd. | LED stabilizing light source device |
| EP0844512A1 (en) * | 1996-06-10 | 1998-05-27 | Sony Cinema Products Corporation | Apparatus for recording data on movie film |
| US5959716A (en) * | 1996-06-10 | 1999-09-28 | Sony Cinema Products Corporation | Data recording device for motion picture film |
| KR20030007051A (en) * | 2001-07-09 | 2003-01-23 | 페베베-루라텍 인두스트리프로둑테 게엠베하 | Method and apparatus for stabilizing a signal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3770966A (en) * | 1971-07-28 | 1973-11-06 | Hitachi Ltd | Light amplifier for use in optical communication system |
| JPS5274765U (en) * | 1975-12-01 | 1977-06-03 | ||
| JPS5368185A (en) * | 1976-11-30 | 1978-06-17 | Nec Corp | Light emitting diode |
| JPS6318857U (en) * | 1986-07-21 | 1988-02-08 |
-
1986
- 1986-08-13 JP JP19093386A patent/JP2591608B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3770966A (en) * | 1971-07-28 | 1973-11-06 | Hitachi Ltd | Light amplifier for use in optical communication system |
| JPS5274765U (en) * | 1975-12-01 | 1977-06-03 | ||
| JPS5368185A (en) * | 1976-11-30 | 1978-06-17 | Nec Corp | Light emitting diode |
| JPS6318857U (en) * | 1986-07-21 | 1988-02-08 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4998043A (en) * | 1989-05-01 | 1991-03-05 | Fujikura Ltd. | LED stabilizing light source device |
| EP0844512A1 (en) * | 1996-06-10 | 1998-05-27 | Sony Cinema Products Corporation | Apparatus for recording data on movie film |
| EP0844512A4 (en) * | 1996-06-10 | 1999-01-07 | Sony Cinema Products Corp | Apparatus for recording data on movie film |
| US5959716A (en) * | 1996-06-10 | 1999-09-28 | Sony Cinema Products Corporation | Data recording device for motion picture film |
| KR20030007051A (en) * | 2001-07-09 | 2003-01-23 | 페베베-루라텍 인두스트리프로둑테 게엠베하 | Method and apparatus for stabilizing a signal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2591608B2 (en) | 1997-03-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |