JPS6344783A - Frequency stabilizer of laser light source - Google Patents
Frequency stabilizer of laser light sourceInfo
- Publication number
- JPS6344783A JPS6344783A JP18921386A JP18921386A JPS6344783A JP S6344783 A JPS6344783 A JP S6344783A JP 18921386 A JP18921386 A JP 18921386A JP 18921386 A JP18921386 A JP 18921386A JP S6344783 A JPS6344783 A JP S6344783A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- scanning
- laser light
- pulse
- circuit
- 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
- 239000003381 stabilizer Substances 0.000 title 1
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims description 15
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000009924 canning Methods 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 description 12
- 238000011105 stabilization Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000010355 oscillation Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000001427 coherent effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/139—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
レーザ光源に生ずる周波数変動を例えば走査型ファプリ
ペロー干渉計にて時間軸上の変位として取り出し、これ
を用いてレーザ光源外部共振器の共振器長可変手段の変
位を生ぜしめてレーザ光源の周波数安定化を図る。[Detailed Description of the Invention] [Summary] Frequency fluctuations occurring in a laser light source are extracted as displacements on the time axis using, for example, a scanning Fabry-Perot interferometer, and this is used to adjust the resonator length variable means of the external resonator of the laser light source. This creates a displacement to stabilize the frequency of the laser light source.
本発明はレーザ光源の周波数安定化装置に関し、更に詳
しく言えば、レーザ光源の周波数変動を時間軸上の変位
に変換し、これを用いてレーザ光源の周波数を安定化す
るレーザ光源の周波数安定化装置に関する。The present invention relates to a frequency stabilization device for a laser light source, and more specifically, the present invention relates to a frequency stabilization device for a laser light source, and more specifically, a frequency stabilization device for a laser light source that converts frequency fluctuations of a laser light source into a displacement on the time axis and uses this to stabilize the frequency of the laser light source. Regarding equipment.
通信の分野においてはそこで取り扱う情報の急激な増大
、通信速度の向上環に対処すべく、従来の電気通信方式
を補完乃至はこれに代わるものとして光通信方式の開発
が活発に行なわれている。In the field of communications, in order to cope with the rapid increase in the amount of information handled and the increase in communication speed, optical communication systems are being actively developed to complement or replace conventional telecommunication systems.
現在開発中にあるコヒーレント通信方式、とりゎけ時間
的コヒーレンスを利用した通信方式では、中間周波数の
変動を抑えるために光源の周波数安定度を十分に高（す
ることが必要である。例えば、レーザ光源の発振周波数
が２００Ｔｔｌｚとしたときの発振周波数の変動を１０
ＭＨｚ程度としたいとす、れば、その安定度はＩ Ｘ
１０−７のオーダになる。Coherent communication systems currently under development, especially communication systems that utilize temporal coherence, require the frequency stability of the light source to be sufficiently high in order to suppress fluctuations in the intermediate frequency. When the oscillation frequency of the light source is 200Ttlz, the fluctuation of the oscillation frequency is 10
If you want to set it to about MHz, then its stability is I
It will be on the order of 10-7.
従来におけるコヒーレント通信方式の光源の代表的なも
のとして、半導体レーザがあり、その周波数安定化方式
の１つの例は第４図に示す如きものである。この方式は
第５図に示す如き光透過特性を有する光フアイバ型リン
グ共振器４ｏを用いてレーザ光の発振周波数の変化度合
を透過光強度の変化として得、これを発振周波数の安定
化に供せんとするものである。部ち、光フアイバ型リン
グ共振器４０の出力光信号を光検出器４２２反転反転器
４４．差動増幅器４６．フィルタ４８及びバッファ増幅
器５０を介して、電／Ａ源５２から半導体レーザ５４に
給電される電流制御に用いてし一ザ光源の周波数を安定
化せんとするものである。A semiconductor laser is a typical light source for conventional coherent communication systems, and one example of its frequency stabilization system is shown in FIG. This method uses an optical fiber ring resonator 4o having light transmission characteristics as shown in Fig. 5 to obtain the degree of change in the oscillation frequency of the laser beam as a change in transmitted light intensity, and uses this to stabilize the oscillation frequency. This is what I am trying to do. The output optical signal of the optical fiber ring resonator 40 is transmitted to a photodetector 422 and an inverter 44 . Differential amplifier 46. This is used to control the current supplied from the power/A source 52 to the semiconductor laser 54 via the filter 48 and the buffer amplifier 50 to stabilize the frequency of the laser light source.
従来の他の周波数安定化方式は第６図に示されるが、こ
の方式はエタロン板６０を周波数基準として用い、この
周波数基準からレーザ光源の発振周波数がずれた度合に
応じて外部共振器長を制御してレーザ光源の周波数安定
化を行なわんとするものである。即ち、厚さ数１１の光
学ガラスの両面に反射膜をコーティングしたエタロン板
（ファプリーペロー）６０は、第６図に示すように、光
の干渉効果により入力レーザ光の周波数に応じてその透
過光強度が周期的な尖鋭特性を示すものである。その特
性の半値付近（第７図中のν０付近）に周波数を固定す
れば、発振周波数の変動は透過光の強度変化となって現
れる。その透過光をホトダイオード６２で電気信号に変
換し、該電気信号を比較５６４で基準電圧と比較してＰ
ＺＴ制御器６６を介してＰＺＴ６８に印加し、グレーテ
ィング７０に変位を与えて外部共振器長を制御し、レー
ザ光源の周波数安定化を図ろうとするものである。Another conventional frequency stabilization method is shown in FIG. 6, which uses an etalon plate 60 as a frequency reference, and adjusts the external resonator length according to the degree to which the oscillation frequency of the laser light source deviates from this frequency reference. The objective is to control the frequency of the laser light source and stabilize it. That is, as shown in FIG. 6, the etalon plate (Fapley-Perot) 60, which is made of optical glass with a thickness of several eleven and coated with reflective films on both sides, changes its transmission according to the frequency of the input laser beam due to the optical interference effect. The light intensity exhibits periodic sharp characteristics. If the frequency is fixed near the half value of the characteristic (near ν0 in FIG. 7), the fluctuation in the oscillation frequency will appear as a change in the intensity of the transmitted light. The transmitted light is converted into an electric signal by a photodiode 62, and the electric signal is compared with a reference voltage by a comparison 564.
This is applied to the PZT 68 via the ZT controller 66 to displace the grating 70 to control the external resonator length and stabilize the frequency of the laser light source.
上述前者の周波数安定化方式は半導体レーザ５４の駆動
電流を制御してその発振周波数を安定化するのに光フア
イバ型リング共振器４ｏの出方信号を用いるが、この出
力信号にはレーザ光パワー自体の変動も又周波数自体の
変動も含まれてしまうため、周波数変動のみについての
制御を行なうのは難しい。The former frequency stabilization method described above uses the output signal of the optical fiber ring resonator 4o to control the drive current of the semiconductor laser 54 and stabilize its oscillation frequency, but this output signal is based on the laser light power. It is difficult to control only the frequency fluctuations, since this includes fluctuations in the frequency itself as well as fluctuations in the frequency itself.
これに対して、上述後者の周波数安定化方式においても
エタロン板６０から得られる透過光の強度変化の中には
、レーザ光の周波数変化に伴う強度変化成分の他に、も
しレーザ光自体に強度ゆらぎが生じている場合にはその
成分も透過光強度変化成分として含まれて来るが、レー
ザ光自体のゆらぎ成分検出のためのホトダイオード７２
と、その検出信号でホトダイオード６２の出力信号（ゆ
らぎ成分×周波数変動成分）を除算する除算器７４とに
より上述後者の透過光強度成分を除き得る。On the other hand, even in the latter frequency stabilization method mentioned above, in the intensity change of the transmitted light obtained from the etalon plate 60, in addition to the intensity change component accompanying the frequency change of the laser beam, if the intensity of the laser beam itself is If fluctuation occurs, that component is also included as a transmitted light intensity change component, but the photodiode 72 is used to detect the fluctuation component of the laser beam itself.
The latter transmitted light intensity component can be removed by a divider 74 that divides the output signal (fluctuation component x frequency fluctuation component) of the photodiode 62 by the detection signal.
しかしながら、２つのホトダイオードを用いることは、
光学系及び電気系の複雑化となる。However, using two photodiodes
This complicates the optical system and electrical system.
本発明は、斯かる問題点に鑑みて創作されたもので、レ
ーザ光の周波数安定化に、レーザ出力光パワーの影響を
可及的に排してレーザ光周波数の安定化を為し得るレー
ザ光源の周波数安定化装置を提供することを目的とする
。The present invention was created in view of such problems, and provides a laser that can stabilize the frequency of laser light by eliminating the influence of the laser output light power as much as possible. The purpose of the present invention is to provide a frequency stabilization device for a light source.
Ｃ問題点を解決するための手段〕
第１図は本発明の原理構成図を示す。本発明は、外部共
振器１を有するレーザ光源において、外部共振器１に光
学的に結合された走査型光学系２と、該走査型光学系２
の走査を生ぜしめる走査制御回路３と、該走査制御回路
３による走査と同期してその走査周期内の所定期間の間
パルスを発生する第１のパルス発生回路４と、前記走査
型光学系２の出力に応答して前記所定期間を超える期間
に亘ってパルスを発生する第２のパルス発生回路５と、
前記第１及び第２のパルス発生回路４．５の出力に接続
されたアンド回路６と、該アンド回路６の出力に接続さ
れ前記外部共振器１の共振器長可変手段７に変位を生ぜ
しめる変位制御回路８とを設けて周波数安定化装置を構
成したものである。Means for Solving Problem C] FIG. 1 shows a diagram of the principle configuration of the present invention. The present invention provides a laser light source having an external resonator 1, including a scanning optical system 2 optically coupled to the external resonator 1, and a scanning optical system 2 that is optically coupled to the external resonator 1.
a first pulse generating circuit 4 that generates a pulse for a predetermined period within the scanning period in synchronization with the scanning by the scanning control circuit 3; and the scanning optical system 2. a second pulse generating circuit 5 that generates pulses for a period exceeding the predetermined period in response to the output of the second pulse generating circuit 5;
An AND circuit 6 connected to the outputs of the first and second pulse generating circuits 4.5 and a resonator length variable means 7 connected to the output of the AND circuit 6 of the external resonator 1 to cause displacement. A displacement control circuit 8 is provided to constitute a frequency stabilizing device.
レーザ光源のレーザ光周波数に変化が生ずると、走査型
光学系から出力する信号の発生時刻が変化する。この出
力信号に応答する第２のパルス発生回路５から予め決め
られた持続期間の第２のパルスが出力される一方、走査
型光学系２の走査と同期して第１のパルス発生回路４か
らその走査開始時刻から所定持続期間の第１のパルスが
出力される。When a change occurs in the laser light frequency of the laser light source, the generation time of the signal output from the scanning optical system changes. A second pulse of a predetermined duration is output from the second pulse generation circuit 5 in response to this output signal, while a second pulse of a predetermined duration is output from the first pulse generation circuit 4 in synchronization with the scanning of the scanning optical system 2. A first pulse of a predetermined duration is output from the scan start time.
これら第１及び第２のパルスがアンド回路６を経て変位
制御回路８に供給されることにより、レーザ光源の周波
数が安定化される。By supplying these first and second pulses to the displacement control circuit 8 via the AND circuit 6, the frequency of the laser light source is stabilized.
第２図は本発明の一実施例を示す。この図において、ｌ
は半導体レーザ光源の外部共ｔｉ器で、７゜は外部共振
器１内に設けられて外部共振器長を変えるＰＺＴ（第１
図の共振器長可変手段７の例）である、２”は走査型フ
ァブリベロー干渉計（第１図２の例）で、これは外部共
振器に光学的に結合されている。３は走査型ファブリベ
ロー干渉計２゛に接続され、そのミラーの走査制御を行
なう走査制御回路である。４゛は走査制御回路３による
走査開始時刻から走査周期内の所定期間の間持続する第
１のパルスを発生するモノマルチバイブレーク（第１図
の第１のパルス発生回路４の例）である。９は走査型フ
プブリペロー干渉計の光出力に光学的に結合された光検
出器で、１０は光検出器９の出力信号を増幅する増幅器
で、１１は増幅器出力信号に応答して所定期間持続する
第２のパルスを発生するモノマルチバイブレークであり
、これら９〜１１から成る部分が第１図の第２のパルス
発生回路５の例である。６はアンド回路である。１２は
アンド回路６の出力に接続された低域フィルタ（ＬＰＦ
） 、１３は低域フィルタ１２の出力を基準電圧と比較
する差動増幅器、１４は比較出力信号を増幅する増幅器
であり、これら１２〜１４から成る部分が第１図の変位
制御回路８の例である。増幅器１４の出力電圧がＰＺＴ
７’ に印加される。FIG. 2 shows an embodiment of the invention. In this figure, l
7° is the external resonator of the semiconductor laser light source, and 7° is the PZT (first
2" is a scanning Fabry-Bero interferometer (example shown in FIG. 1 and 2), which is optically coupled to an external resonator. 3 is a scanning This is a scan control circuit that is connected to the Fabry-Bello interferometer 2' and controls the scanning of its mirror. 4' is a first pulse that lasts for a predetermined period within the scan period from the time when the scan by the scan control circuit 3 starts. (an example of the first pulse generating circuit 4 in Fig. 1). 9 is a photodetector optically coupled to the optical output of the scanning Fubvli-Perot interferometer, and 10 is a photodetector. The amplifier 11 amplifies the output signal of the amplifier 9, and the reference numeral 11 is a mono-multi-by-break that generates a second pulse that lasts for a predetermined period in response to the amplifier output signal. 2 is an example of the pulse generating circuit 5. 6 is an AND circuit. 12 is a low-pass filter (LPF) connected to the output of the AND circuit 6.
), 13 is a differential amplifier that compares the output of the low-pass filter 12 with a reference voltage, 14 is an amplifier that amplifies the comparison output signal, and the portion consisting of these 12 to 14 is an example of the displacement control circuit 8 in FIG. It is. The output voltage of amplifier 14 is PZT
7' is applied.
上述構成になる本発明回路の動作態様を説明する。The operation mode of the circuit of the present invention configured as described above will be explained.
本発明回路の動作が始まると、走査制御回路３から第３
図の０）に示す如き走査制御用ランプ電圧が走査型ファ
ブリペロ−干渉計２゛に周期的に供給されてその走査を
反復する。この走査と同期したトリガ信号（第３図の１
））がモノマルチバイブレーク４°に供給されてそこか
ら第３図の３）に示すような持続期間ｔ１の第１のパル
スが発生される。When the operation of the circuit of the present invention starts, the scan control circuit 3
A scanning control lamp voltage as shown at 0) in the figure is periodically supplied to the scanning Fabry-Perot interferometer 2' to repeat its scanning. A trigger signal synchronized with this scanning (1 in Figure 3)
)) is applied to the monomulti-bibrake 4° from which a first pulse of duration t1 as shown in 3) of FIG. 3 is generated.
上記走査が行なわれている走査型ファブリペロ−干渉計
２゛からレーザ光の周波数に応じて決まる走査周期内の
時刻に光出力が光検出器９に照射され、その検出信号が
増幅器１０で増幅されて（第３図の２））モノマルチバ
イブレータ１１に印加される。そのモノマルチバイブレ
ータ１１からは第３図の４）に示されるような第２のパ
ルスが発生される。この第２のパルスも又第３図の４）
からも明らかな如くレーザ光の周波数変化によってその
発生時刻を異にする。The optical output from the scanning Fabry-Perot interferometer 2 in which the above scanning is performed is applied to the photodetector 9 at a time within the scanning period determined according to the frequency of the laser beam, and the detection signal is amplified by the amplifier 10. (2 in FIG. 3)) is applied to the mono-multivibrator 11. The mono-multivibrator 11 generates a second pulse as shown in 4) in FIG. This second pulse is also 4) in Figure 3.
As is clear from the above, the time of occurrence varies depending on the frequency change of the laser beam.
上述の第１及び第２のパルスの論理積をアンド回路６で
とることにより、レーザ光の周波数変化は第３図の５）
に示すように、パルス幅の変化に転化される。By calculating the logical product of the above-mentioned first and second pulses using the AND circuit 6, the frequency change of the laser beam is determined by 5) in Fig. 3.
This is converted into a change in pulse width, as shown in .
そのパルスが低域フィルタ１２を介して差動増幅器１３
で基準電圧（基準周波数相当の電圧）と比較されて出力
される誤差信号が増＠器１４を介してＰＺＴ７°に印加
されることによって、レーザ光の周波数は基準周波数に
安定化される。The pulse passes through a low-pass filter 12 to a differential amplifier 13.
The frequency of the laser beam is stabilized to the reference frequency by applying the error signal which is compared with a reference voltage (voltage corresponding to the reference frequency) and output to the PZT 7° via the amplifier 14.
以上述べたように本発明によれば、レーザ光の周波数変
化が時間軸上の変化に変換されているから、レーザ光の
周波数安定化にレーザ出力光パワーの影響を可及的に排
し得て、より安定したレーザ光の発生を可能にする。As described above, according to the present invention, the frequency change of the laser beam is converted into a change on the time axis, so the influence of the laser output light power can be eliminated as much as possible on the frequency stabilization of the laser beam. This makes it possible to generate more stable laser light.
第１図は本発明の原理構成図、
第２図は本発明の一実施例を示す図、
第３図はタイミングチャート、
第４図は従来の１つの周波数安定化方式を示す図、第５
図は光フアイバ型リング共振器の光る過特性図、
第６図は従来の他の周波数安定化方式を示す図、第７図
はエタロン板の光透過特性図を示す図である。
第１図及び第２図において、
１は外部共振器、
２は走査型光学系、
３は走査制御回路、
４は第１のパルス発生回路、
５は第２のパルス発生回路、
６はアンド回路、
７は共振器長可変手段、
８は変位制御回路である。
本発明の原理構成図
第１図
５） ｐ関／” ｔｋ Ｘ −一付−Ｌ−一一タイミ
ングチヤード
第３図
第４図Figure 1 is a diagram showing the principle configuration of the present invention, Figure 2 is a diagram showing an embodiment of the present invention, Figure 3 is a timing chart, Figure 4 is a diagram showing one conventional frequency stabilization method, and Figure 5 is a diagram showing one conventional frequency stabilization method.
FIG. 6 is a diagram showing an optical fiber type ring resonator's luminous excess characteristics, FIG. 6 is a diagram showing another conventional frequency stabilization method, and FIG. 7 is a diagram showing a light transmission characteristic diagram of an etalon plate. 1 and 2, 1 is an external resonator, 2 is a scanning optical system, 3 is a scanning control circuit, 4 is a first pulse generation circuit, 5 is a second pulse generation circuit, and 6 is an AND circuit. , 7 is a resonator length variable means, and 8 is a displacement control circuit. Principle configuration diagram of the present invention Fig. 1 5) p/tk
Claims (1)
振器（１）に光学的に結合された走査型光学系（２）と
、 該走査型光学系（２）の走査を生ぜしめる走査制御回路
（３）と、 該走査制御回路（３）による走査と同期してその走査周
期内の所定期間の間パルスを発生する第１のパルス発生
回路（４）と、 前記走査型光学系（２）の出力に応答して前記所定期間
を超える期間に亘ってパルスを発生する第２のパルス発
生回路（５）と、 前記第１及び第２のパルス発生回路（４、５）の出力に
接続されたアンド回路（６）と、 該アンド回路（６）の出力に接続され前記外部共振器（
１）の共振器長可変手段（７）に変位を生ぜしめる変位
制御回路（８）とを設けたことを特徴とするレーザ光源
の周波数安定化装置。[Claims] A laser light source having an external resonator (1), comprising: a scanning optical system (2) optically coupled to the external resonator (1); and a scanning optical system (2). a first pulse generating circuit (4) that generates a pulse for a predetermined period within the scanning period in synchronization with the scanning by the scanning control circuit (3); a second pulse generating circuit (5) that generates a pulse for a period exceeding the predetermined period in response to the output of the optical system (2); and the first and second pulse generating circuits (4, 5). ) and an AND circuit (6) connected to the output of the AND circuit (6); and an AND circuit (6) connected to the output of the AND circuit (6) and connected to the external resonator (
1. A frequency stabilizing device for a laser light source, characterized in that the resonator length variable means (7) of 1) is provided with a displacement control circuit (8) for causing displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18921386A JPS6344783A (en) | 1986-08-12 | 1986-08-12 | Frequency stabilizer of laser light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18921386A JPS6344783A (en) | 1986-08-12 | 1986-08-12 | Frequency stabilizer of laser light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6344783A true JPS6344783A (en) | 1988-02-25 |
Family
ID=16237441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18921386A Pending JPS6344783A (en) | 1986-08-12 | 1986-08-12 | Frequency stabilizer of laser light source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6344783A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6362388A (en) * | 1986-09-03 | 1988-03-18 | Hitachi Ltd | Semiconductor laser device |
| EP0336308A2 (en) * | 1988-03-31 | 1989-10-11 | CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. | Method and device for automatic frequency control of semiconductor lasers |
| CN102738694A (en) * | 2012-06-25 | 2012-10-17 | 中国科学院上海技术物理研究所 | Method for realizing laser frequency stabilization by utilizing Fabry-Perot (F-P) interferometer |
-
1986
- 1986-08-12 JP JP18921386A patent/JPS6344783A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6362388A (en) * | 1986-09-03 | 1988-03-18 | Hitachi Ltd | Semiconductor laser device |
| EP0336308A2 (en) * | 1988-03-31 | 1989-10-11 | CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. | Method and device for automatic frequency control of semiconductor lasers |
| EP0336308A3 (en) * | 1988-03-31 | 1991-02-27 | CSELT Centro Studi e Laboratori Telecomunicazioni S.p.A. | Method and device for automatic frequency control of semiconductor lasers |
| CN102738694A (en) * | 2012-06-25 | 2012-10-17 | 中国科学院上海技术物理研究所 | Method for realizing laser frequency stabilization by utilizing Fabry-Perot (F-P) interferometer |
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