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JPH0464478B2 - - Google Patents
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JPH0464478B2 - - Google Patents

Info

Publication number
JPH0464478B2
JPH0464478B2 JP59241755A JP24175584A JPH0464478B2 JP H0464478 B2 JPH0464478 B2 JP H0464478B2 JP 59241755 A JP59241755 A JP 59241755A JP 24175584 A JP24175584 A JP 24175584A JP H0464478 B2 JPH0464478 B2 JP H0464478B2
Authority
JP
Japan
Prior art keywords
laser
anode
tube
graphite
ion
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 - Lifetime
Application number
JP59241755A
Other languages
Japanese (ja)
Other versions
JPS61120485A (en
Inventor
Norio Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP59241755A priority Critical patent/JPS61120485A/en
Publication of JPS61120485A publication Critical patent/JPS61120485A/en
Publication of JPH0464478B2 publication Critical patent/JPH0464478B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01SDEVICES 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
    • H01S3/00Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/02Constructional details
    • H01S3/03Constructional details of gas laser discharge tubes
    • H01S3/032Constructional details of gas laser discharge tubes for confinement of the discharge, e.g. by special features of the discharge constricting tube
    • H01S3/0323Constructional details of gas laser discharge tubes for confinement of the discharge, e.g. by special features of the discharge constricting tube by special features of the discharge constricting tube, e.g. capillary

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Lasers (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)

Description

【発明の詳細な説明】 〔発明の属する分野の説明〕 本発明は、イオンレーザ装置に関し、特にモー
ド抑制用グラフアイトデイスクをアノードと光学
窓間に具備したイオンレーザ装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Description of the Field of the Invention] The present invention relates to an ion laser device, and more particularly to an ion laser device including a graphite disk for mode suppression between an anode and an optical window.

〔従来の技術の説明〕[Description of conventional technology]

従来のこの種のイオンレーザ装置は、第1図に
示すように、レーザ管1はアノード5とカソード
7との間で放電し、出力ミラー3と全反射ミラー
4とで構成される光共振器によりレーザ発振し、
レーザ光12を出力する。
In a conventional ion laser device of this kind, as shown in FIG. The laser oscillates,
A laser beam 12 is output.

イオンレーザは、イオン化された希ガスのエネ
ルギーレベル間の遷移によつてレーザ発振を行な
わせるものであり、可視域においてワツト台の大
出力連続発振が得られる唯一のガスレーザなので
ラマン分光、ホログラフイーなどに広く用いられ
ている。しかし、希ガスのイオン化エネルギーが
高いため、レーザ細管内に数10アンペアにおよぶ
大電流アーク放電を行なわせる必要があり、この
ときレーザ細管では6〜9kWに達する熱発生が
ある。したがつて、イオンレーザの細管として
は、イオンの衝撃に耐えることができ、熱分解し
にくい材料をえらぶ必要がある。そのため、中央
に穴の設けられたグラフアイトデイスク群6をな
らべ、中央穴の列をもつてレーザ細管とするもの
が用いられている。さらに6〜9kWにおよぶ熱
をレーザ細管外部に放出させるため、管外部に冷
却水を通すなどして冷却しているが、長時間使用
していると、グラフアイトデイスク群6の中央部
8のグラフアイトが粉末となつてくずれ、中央部
8の穴径は徐々に大きくなり、ついにレーザ光1
2をガウスビーム(TEM00モード)にするため
に必要な最大径より大きくなり、レーザ光12は
マルチモード(TEM10モードなどの混入したモ
ード)になり、レーザの基本的特性であるコヒー
レンシ(可干渉性)が悪くなるという問題があ
る。
Ion lasers perform laser oscillation by transitioning between energy levels of ionized rare gases, and are the only gas lasers that can produce continuous oscillations with a high output on the order of Watts in the visible range, so they can be used for Raman spectroscopy, holography, etc. widely used. However, since the ionization energy of the rare gas is high, it is necessary to cause a large current arc discharge of several tens of amperes in the laser tube, and at this time, heat generation of 6 to 9 kW occurs in the laser tube. Therefore, for the thin tube of the ion laser, it is necessary to select a material that can withstand the impact of ions and is resistant to thermal decomposition. For this reason, a group of graphite disks 6 each having a hole in the center are lined up to form a laser thin tube with a row of holes in the center. Furthermore, in order to release 6 to 9 kW of heat to the outside of the laser thin tube, cooling water is passed through the outside of the tube for cooling. The graphite turns into powder and crumbles, and the diameter of the hole in the central part 8 gradually increases until the laser beam 1
2 is larger than the maximum diameter required to make it into a Gaussian beam (TEM 00 mode), the laser beam 12 becomes multimode (mixed modes such as TEM 10 mode), and the coherency (possible There is a problem that interference (interference) deteriorates.

〔発明の目的〕[Purpose of the invention]

本発明のイオンレーザ装置は前記欠点を除去し
長期間にわたつてガウスビームを得ることのでき
るイオンレーザ装置を提供することにある。
An object of the ion laser device of the present invention is to provide an ion laser device that eliminates the above-mentioned drawbacks and can obtain a Gaussian beam for a long period of time.

〔発明の構成および作用の説明〕[Description of the structure and operation of the invention]

次に本発明について図面を参照して説明する。
第1図において、レーザ管1は、アノード5とカ
ソード7との間で放電し、出力ミラー3と全反射
ミラー4とで構成される光共振器によりレーザ発
振し、レーザ光12を出力する。
Next, the present invention will be explained with reference to the drawings.
In FIG. 1, a laser tube 1 generates a discharge between an anode 5 and a cathode 7, oscillates with an optical resonator including an output mirror 3 and a total reflection mirror 4, and outputs a laser beam 12.

このレーザ管にはアノード5と光学窓2の間に
中央孔8′の穴があいたモード抑制グラフアイト
デイスク10が図示のごとくアノード5から離れ
て設けられており、アノード5とカソード7との
間の放電の影響を受けないため粉末状になつてく
ずれることなく、中央孔8′の穴径に変化は無い。
モード制御グラフアイトデイスク10がアノード
5に密着していると、放電プラズマのスパツタを
受け、穴径は経時変化を受けるので、放電の影響
を受けないよう図示のごとくデイスク10をアノ
ード5から離して配置する必要がある。
In this laser tube, a mode-suppressing graphite disk 10 with a central hole 8' is provided between the anode 5 and the optical window 2, as shown, and is spaced apart from the anode 5, and between the anode 5 and the cathode 7. Since it is not affected by the electric discharge, it does not turn into powder and crumble, and the diameter of the central hole 8' remains unchanged.
If the mode control graphite disk 10 is in close contact with the anode 5, it will receive spatter from the discharge plasma and the hole diameter will change over time. Therefore, the disk 10 should be separated from the anode 5 as shown in the figure to avoid being affected by the discharge. need to be placed.

〔効果の説明〕[Explanation of effects]

以上説明したようにレーザ光をガウスビーム
(TEM00モード)にするために必要な中央孔8′
より大きくなることはなく、レーザ出力は長期間
にわたつてガウスビームを保持できる。
As explained above, the center hole 8' is necessary to make the laser beam into a Gaussian beam (TEM 00 mode).
The laser output can maintain a Gaussian beam for long periods of time.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明のイオンレーザ装置の一実施例
を示す断面図、第2図は従来のイオンレーザ装置
を示す断面図である。 1……レーザ管、2,2′……光学窓、3……
出力ミラー、4……全反射ミラー、5……アノー
ド、6……グラフアイトデイスク群、7……カソ
ード、8,8′……中央部、9……リターンパス、
10……モード抑制グラフアイトデイスク、12
……レーザ光。
FIG. 1 is a sectional view showing an embodiment of the ion laser device of the present invention, and FIG. 2 is a sectional view showing a conventional ion laser device. 1... Laser tube, 2, 2'... Optical window, 3...
Output mirror, 4... Total reflection mirror, 5... Anode, 6... Graphite disk group, 7... Cathode, 8, 8'... Central part, 9... Return path,
10...Mode suppression graphite disk, 12
...Laser light.

Claims (1)

【特許請求の範囲】[Claims] 1 アノードとカソード間にグラフアイトデイス
ク群よりなる細管を有するイオンレーザ装置にお
いて、前記アノードとレーザ管光学窓の間にモー
ド抑制用のグラフアイトデイスクを前記アノード
から離して備えたことを特徴とするイオンレーザ
装置。
1. An ion laser device having a thin tube composed of a group of graphite disks between an anode and a cathode, characterized in that a graphite disk for mode suppression is provided between the anode and the laser tube optical window, separated from the anode. Ion laser equipment.
JP59241755A 1984-11-16 1984-11-16 Ion laser device Granted JPS61120485A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59241755A JPS61120485A (en) 1984-11-16 1984-11-16 Ion laser device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59241755A JPS61120485A (en) 1984-11-16 1984-11-16 Ion laser device

Publications (2)

Publication Number Publication Date
JPS61120485A JPS61120485A (en) 1986-06-07
JPH0464478B2 true JPH0464478B2 (en) 1992-10-15

Family

ID=17079045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59241755A Granted JPS61120485A (en) 1984-11-16 1984-11-16 Ion laser device

Country Status (1)

Country Link
JP (1) JPS61120485A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54109481U (en) * 1978-01-19 1979-08-01
JPS5766568U (en) * 1980-10-07 1982-04-21

Also Published As

Publication number Publication date
JPS61120485A (en) 1986-06-07

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