JPH0732295B2 - Tunable laser source - Google Patents
Tunable laser sourceInfo
- Publication number
- JPH0732295B2 JPH0732295B2 JP10794988A JP10794988A JPH0732295B2 JP H0732295 B2 JPH0732295 B2 JP H0732295B2 JP 10794988 A JP10794988 A JP 10794988A JP 10794988 A JP10794988 A JP 10794988A JP H0732295 B2 JPH0732295 B2 JP H0732295B2
- Authority
- JP
- Japan
- Prior art keywords
- raman
- light
- laser
- stokes
- cell
- 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.)
- Expired - Fee Related
Links
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
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は試料の原子蛍光分析や分光光度測定その他に用
いるレーザー光源に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a laser light source used for atomic fluorescence analysis of a sample, spectrophotometric measurement and the like.
（ロ）従来の技術 試料の分析等に用いるレーザー光源として色素レーザー
が用いられている。第３図は市販されている従来の色素
レーザの構成を図示したもので、フォーカシングレンズ
30を介してエキシマレーザーからの光31により励起され
たダイフローセル32で発振した光は、ビームエキスパン
ダー（プリズム）33を介してグレーティング34とレゾネ
ータエンドミラー35の間で増幅されて出力される。この
ようなレーザー光源の波長可変域を拡大するためにラマ
ンセルが用いられる。ラマン効果を起こす物質をいれた
セルに上記色素レーザー光を入射すると、誘導ラマン効
果によって物質固有の周波数ωsrだけ変化した周波数 ω＝ω1−ωsr の光（ストークス光）及び周波数 ω＝ω1＋ωsr の光（反ストークス光）が発生し、これらの光が元とな
って高次のストークス光及び反ストークス光 ω＝ω1±ｍωsr が発生する。ストークス光及び反ストークス光は単色性
のよいコヒーレント光であり、これらの光を利用するこ
とにより種々の波長のレーザ光を光源として利用でき
る。(B) Conventional technology A dye laser is used as a laser light source used for sample analysis and the like. Fig. 3 shows the structure of a conventional dye laser that is commercially available. Focusing lens
The light oscillated in the die flow cell 32 excited by the light 31 from the excimer laser via 30 is amplified and output between the grating 34 and the resonator end mirror 35 via the beam expander (prism) 33. Raman cells are used to expand the wavelength variable range of such laser light sources. When the dye laser light is incident on a cell containing a substance that causes a Raman effect, the light having a frequency ω = ω 1 −ωsr (Stokes light) and the frequency ω = ω 1 + ωsr changed by the frequency ωsr peculiar to the substance by the stimulated Raman effect. Light (anti-Stokes light) is generated, and high-order Stokes light and anti-Stokes light ω = ω 1 ± mωsr are generated based on these lights. Stokes light and anti-Stokes light are coherent light with good monochromaticity, and by using these lights, laser light of various wavelengths can be used as a light source.
（ハ）解決すべき課題 しかしながらこれらの誘導ラマン光のうち高次のストー
クス光は微弱で、せいぜい３次のストークス光・反スト
ークス光までしか一般には利用できないのが普通であ
る。また、励起光源である色素レーザーの波長をシフト
させても、色素レーザーの発振機構上の制約もあり、広
い波長範囲に渡って連続性をもつ光を得ることができな
かった。(C) Problems to be solved However, among these stimulated Raman lights, the higher-order Stokes light is weak, and generally, at most, only third-order Stokes light and anti-Stokes light can be used. Further, even if the wavelength of the dye laser, which is the excitation light source, is shifted, it is not possible to obtain light having continuity over a wide wavelength range due to restrictions on the oscillation mechanism of the dye laser.
（ニ）課題を解決するための手段 本発明は上記の課題を解決するため、特定のラマン媒体
を２段にカスケードに構成することによって広範囲の連
続波長波長可変光を得ることを見出したもので、メタン
及び水素を夫々ラマン媒体とするラマンセルに、BBQ色
素レーザー光を直列的に入射し、発生する誘導ラマン光
を利用するようにした。(D) Means for Solving the Problems In order to solve the above problems, the present invention has found that a wide range of continuous wavelength tunable light can be obtained by configuring a specific Raman medium in a two-stage cascade. , BBQ dye laser light was made incident on the Raman cells with methane and hydrogen as Raman media, respectively, and the stimulated Raman light generated was used.
（ホ）作用 メタン及び水素を夫々ラマン媒体とするラマンセルで発
生するラマン光（ストークス光及び反ストークス光）の
両方が利用可能となり、BBQ色素レーザーの波長可変域
とあわせ、約365〜600nmの範囲で連続可変波長範囲が得
られる。(E) Action Both Raman light (Stokes light and anti-Stokes light) generated by Raman cells using methane and hydrogen as Raman media can be used, and the range of about 365 to 600 nm is included, together with the wavelength variable range of the BBQ dye laser. Gives a continuously variable wavelength range.
（ヘ）実施例 第１図は本発明の一実施例のレーザー光源を示す構成図
である。本図の構成においては、メタン及び水素を夫々
ラマン媒体とするラマンセル1,2に、BBQ色素レーザー４
の光を直列的に入射し、発生する誘導ラマン光を利用す
る。３は色素レーザー４を励起するエキシマレーザーで
あり、色素レーザー４のレーザー光はプリズム７で直角
方向に曲げられてレンズ８で集束してラマンセル１に入
射する。ラマンセル１からの光はレンズ９、プリズム1
0、レンズ11を介してラマンセル２に入射し、レンズ12
を介して取出される。これらのレンズはレーザ光の発散
を防止するために用いられている。ラマンセル1,2には
メタンガスボンベ６、水素ガスボンベ５が管13により接
続されており、弁14,15,16,17,18の開閉によって夫々の
セルに個別にガスを充填でき、濃度を調節できる。本実
施例では各々２〜30kg/cm2の圧力とし片方のセルのみ、
又は両方のセルの夫々のガスを充填して用いる。(F) Embodiment FIG. 1 is a configuration diagram showing a laser light source according to an embodiment of the present invention. In the configuration shown in the figure, BBQ dye laser 4 is added to Raman cells 1 and 2 using Raman media of methane and hydrogen, respectively.
Light is incident in series and the generated stimulated Raman light is used. Reference numeral 3 denotes an excimer laser that excites the dye laser 4. The laser light of the dye laser 4 is bent at a right angle by the prism 7, focused by the lens 8 and incident on the Raman cell 1. Light from Raman cell 1 is lens 9, prism 1
0, enters the Raman cell 2 through the lens 11, and the lens 12
Be taken out through. These lenses are used to prevent the divergence of laser light. A methane gas cylinder 6 and a hydrogen gas cylinder 5 are connected to the Raman cells 1 and 2 by a pipe 13. By opening and closing valves 14, 15, 16, 17, and 18, each cell can be individually filled with gas and the concentration can be adjusted. . In this embodiment, each pressure is 2 to 30 kg / cm2, and only one cell is
Alternatively, each gas of both cells is filled and used.
第２図は第１図構成のレーザー光源により得られた出力
光のスペクトルである。図中BBQ×1/2とあるのはBBQ色
素レーザー４の出力波長を変えた場合の出力パルスのエ
ネルギー（mJ）の分布をレンジ（縦軸）を1/2に縮小し
て表わしたもの（スペクトル）である。またCH4S1，CH4
S2，H2S1，H2S2等は夫々ラマン媒体としてメタン，水素
を入れたラマンセル1,2で発生するストークス線の出力
パルスエネルギー分布を表わし、H2AS1，H2AS2は水素を
入れたラマンセル２で発生するアンチストークス線の出
力パルスエネルギー分布を表わす。またCH4S1‐H2S1は
メタンを入れたラマンセル１で発生するストークス線が
もととなって水素を入れたラマンセル２で発生するスト
ークス線の出力パルスエネルギー分布を表わす。図中の
×10はレンジ（縦軸）を10倍に拡大して表わしたことを
示す。FIG. 2 is a spectrum of output light obtained by the laser light source having the structure shown in FIG. In the figure, BBQ × 1/2 represents the distribution of the output pulse energy (mJ) when the output wavelength of the BBQ dye laser 4 is changed, with the range (vertical axis) reduced to 1/2 ( Spectrum). Also, CH 4 S 1 , CH 4
S 2 , H 2 S 1 , H 2 S 2 etc. represent the output pulse energy distributions of Stokes lines generated in Raman cells 1 and 2 containing methane and hydrogen as Raman media, respectively, and H 2 AS 1 , H 2 AS 2 Represents the output pulse energy distribution of the anti-Stokes line generated in the Raman cell 2 containing hydrogen. CH 4 S 1 -H 2 S 1 represents the output pulse energy distribution of the Stokes line generated in the Raman cell 2 containing hydrogen based on the Stokes line generated in the Raman cell 1 containing methane. In the figure, x10 indicates that the range (vertical axis) is magnified 10 times.
（ト）効果 本発明によるとメタン及び水素を夫々ラマン媒体とする
ラマンセルで発生するラマン光を相乗的に利用できるこ
とになり、第２図に示すようにBBQ色素レーザーの波長
可変域とあわせ、約365〜600nmの範囲で連続波長可変な
レーザー光源が得られる。このような光源を試料の分析
等に用いると、光源の種類を変更せずに広い波長領域に
渡る分析を連続して行え、非常に便利である。(G) Effect According to the present invention, it is possible to synergistically use the Raman light generated in the Raman cell using methane and hydrogen as Raman media, respectively, and as shown in FIG. A laser light source with a continuously variable wavelength in the range of 365 to 600 nm can be obtained. When such a light source is used for analysis of a sample or the like, it is very convenient because analysis over a wide wavelength range can be continuously performed without changing the kind of the light source.
第１図は本発明の一実施例のレーザー光源を示す構成図
であり、第２図は第１図構成のレーザー光源により得ら
れた出力光のスペクトルであり、第３図は市販されてい
る従来の色素レーザーの構成を示す図である。 1,2……ラマンセル ３……エキシマレーザー ４……BBQ色素レーザー ６……メタンガスボンベ ５……水素ガスボンベFIG. 1 is a constitutional view showing a laser light source of one embodiment of the present invention, FIG. 2 is a spectrum of output light obtained by the laser light source of the constitution shown in FIG. 1, and FIG. 3 is commercially available. It is a figure which shows the structure of the conventional dye laser. 1,2 …… Raman cell 3 …… Excimer laser 4 …… BBQ dye laser 6 …… Methane gas cylinder 5 …… Hydrogen gas cylinder
Claims (1)
マンセルに、BBQ色素レーザー光を直列的に入射し、発
生する誘導ラマン光を利用することを特徴とする可変波
長レーザー光源。1. A tunable laser light source characterized in that a BBQ dye laser beam is serially incident on a Raman cell using methane and hydrogen as a Raman medium, and stimulated Raman light generated is utilized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10794988A JPH0732295B2 (en) | 1988-04-30 | 1988-04-30 | Tunable laser source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10794988A JPH0732295B2 (en) | 1988-04-30 | 1988-04-30 | Tunable laser source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01278791A JPH01278791A (en) | 1989-11-09 |
| JPH0732295B2 true JPH0732295B2 (en) | 1995-04-10 |
Family
ID=14472136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10794988A Expired - Fee Related JPH0732295B2 (en) | 1988-04-30 | 1988-04-30 | Tunable laser source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0732295B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69108961T2 (en) * | 1990-02-26 | 1995-08-24 | Hughes Aircraft Co | Two-cell Raman laser converter. |
| CN116247503A (en) * | 2021-12-03 | 2023-06-09 | 中国科学院大连化学物理研究所 | A gas-stimulated Raman frequency conversion device that regulates laser output through a gas medium |
-
1988
- 1988-04-30 JP JP10794988A patent/JPH0732295B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01278791A (en) | 1989-11-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |