JPS59188987A - Ion laser device - Google Patents

Ion laser device

Info

Publication number
JPS59188987A
JPS59188987A JP6318183A JP6318183A JPS59188987A JP S59188987 A JPS59188987 A JP S59188987A JP 6318183 A JP6318183 A JP 6318183A JP 6318183 A JP6318183 A JP 6318183A JP S59188987 A JPS59188987 A JP S59188987A
Authority
JP
Japan
Prior art keywords
laser
anode
discharge current
cathode
magnet coil
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
Application number
JP6318183A
Other languages
Japanese (ja)
Inventor
Norio Takahashi
鷹「はし」　紀雄
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
NEC Corp
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6318183A priority Critical patent/JPS59188987A/en
Publication of JPS59188987A publication Critical patent/JPS59188987A/en
Pending legal-status Critical Current

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
    • H01S3/02—Constructional details
    • H01S3/03—Constructional details of gas laser discharge tubes
    • H01S3/032—Constructional details of gas laser discharge tubes for confinement of the discharge, e.g. by special features of the discharge constricting tube
    • H01S3/0326—Constructional details of gas laser discharge tubes for confinement of the discharge, e.g. by special features of the discharge constricting tube by an electromagnetic field

Landscapes

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

Abstract

PURPOSE:To obtain a laser output light which can hold a gauss beam for a long time by a method wherein the end part of the group of graphite disks provided between the anode and the cathode is equipped with a magnet coil to particularly increase the discharge current density of the fine tube part. CONSTITUTION:A laser tube 1 discharges between the anode 5 and the cathode 7, laser-oscillates by means of a photo resonator composed of an output mirror 3 and a total reflection mirror 4, and outputs the laser light 13. The magnet coil 10 converges the discharge current between the anode 5 and the cathode 7 to the center hole part of the group 6 of graphite disks, thus maximize the laser light 13. While, the magnet coil 11 particularly converges the discharge current between the anode 5 and the cathode 7 to the center 8 of a mode inhibition graphite disk 12 and then restrains the ion impact due to the discharge current at the center 8 to the minimum. Thereby, the laser output light can hold the gauss beam for a long time.

Description

【発明の詳細な説明】 本発明は、グラファイト焼結型細管を有するイオンレー
ザ装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ion laser device having a graphite sintered capillary.

従来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とカン−ドアとの間で放電し、
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
によシレーザ発振し、レーザ光１３を出力する。Conventionally, this type of ion laser device, as shown in Figure 1,
The laser tube 1 discharges between the anode 5 and the can door,
Laser oscillation is performed by an optical resonator constituted by an output mirror 3 and a total reflection mirror 4, and a laser beam 13 is output.

また、マグネットコイルｌＯはグラファイトディスク群
６の中央穴部にアノード５とカン−ドアとの間の放電電
流を集束し、放電電流密度を適正にし、レーザ光１３を
最大にするためのものである。Furthermore, the magnet coil 1O is used to focus the discharge current between the anode 5 and the can door into the central hole of the graphite disk group 6, to optimize the discharge current density, and to maximize the laser beam 13. .

イオンレーザは、イオン化された希ガスのエネルギーレ
ベル間の遷移によってレーザ発振を行なわせるものであ
シ、可視域においてワンド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、ホログラフィ−
などに広く用いうしている。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υ、こ
のときレーザ細管では６〜９ｋｗに達する熱発生がある
。したがって、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ァイト
ディスク群６をならべ、中央穴の列をもってレーザ細管
とするものが用いられている。さらに６〜９　ｋｗ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、マルチモード抑制グラファイトディスクの中央部
８０グラフアイトが粉末となってくずれ、中央部８の穴
径は徐々に大きくなシ、ついにレーザ光１３をガウスビ
ーム（ＴＥＭ、、モード）にするために必要な最大径よ
シ大きくなシ、レーザ光１３はマルチモード（ＴｇＭ、
、モードなどの混入したモード）になシ、レーザの基本
的特性であるコヒーレンジ（可干渉性）が悪くなるとい
う問題がある。Ion lasers perform laser oscillation by transitions between energy levels of ionized rare gases.Ion lasers are the only gas lasers that can achieve continuous oscillation with a wand-like output in the visible range, so they can be used for Raman spectroscopy, holography, etc.
It is widely used for things such as. 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, it is necessary to select a material for the thin tube of the ion laser 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 is lined up, and the row of holes in the center forms a laser thin tube. Furthermore, in order to dissipate 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 it becomes larger than the maximum diameter required to turn the laser beam 13 into a Gaussian beam (TEM mode). Light 13 is multimode (TgM,
, mode, etc.), there is a problem in that the coherence range (coherence), which is a fundamental characteristic of lasers, deteriorates.

本発明の目的は、前記欠点を除去し、長期間にわたって
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。SUMMARY OF THE INVENTION An object 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.

以下第２図の一実施例について本発明の詳細な説明する
。The present invention will be described in detail below with reference to an embodiment shown in FIG.

レーザ管１はアノード５とカン−ドアとの間で放電し、
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
によシレーザ発振し、レーザ光１３を出力する。そして
マグネットコイル１０は、グラファイトディスク郡６の
中央穴部にアノード５とカン−ドアとの間の放電電流を
集束し、放電電流密度を適正にしレーザ光１３を最大に
する、またマグネットコイル１１はモード抑制グラファ
イトディスク１２の中央部８にアノード５とカソード７
との間の放電電流を特に集束し、放電電流密度を上昇さ
せ、前記中央部８に放電電流によるイオン衝撃を最小限
に抑制する。従って長時間使用してもモード抑制グラフ
ァイトディスク１０の中央部８はイオン衝撃を受けない
ため粉末状になってくずれることなく、中央部８の穴径
に変化は無い。このためレーザ光をガらスピーム（ＴＥ
Ｍ、。The laser tube 1 discharges between the anode 5 and the can door,
Laser oscillation is performed by an optical resonator constituted by an output mirror 3 and a total reflection mirror 4, and a laser beam 13 is output. The magnet coil 10 focuses the discharge current between the anode 5 and the can door into the central hole of the graphite disk group 6, and optimizes the discharge current density to maximize the laser beam 13. An anode 5 and a cathode 7 in the central part 8 of the mode-suppressing graphite disk 12
Specifically, the discharge current between the central portion 8 is focused, the discharge current density is increased, and the ion bombardment caused by the discharge current is suppressed to the minimum. Therefore, even if used for a long time, the center part 8 of the mode suppressing graphite disk 10 is not subjected to ion bombardment, so it does not become powdery and crumble, and the hole diameter of the center part 8 does not change. For this reason, the laser beam is
M.

モード）にするために必要な最大径よシ大きくなること
はなく、レーザ出力光は、長期間にわたってガウスビー
ムを保持できる。mode), the laser output light can maintain a Gaussian beam for a long period of time.

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

第１図は従来のイオンレーザ装置を示す断面図、第２図
は本発明の一実施例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
ァイトディスク群、７・・・・・・カソード、８・・・
・・・中央部、９・・・・・・リターンパス、１０．１
１・・・・・・マグネットコイル、１２・・・・・・モ
ード抑制グラファイトディスク、１３・・・・・・レー
ザ光。 ・’　ニー、／FIG. 1 is a sectional view showing a conventional ion laser device, and FIG. 2 is a sectional view showing an embodiment of the present invention. 1... Laser tube, 2.2'... Optical window, 3... Output mirror, 4... Total reflection mirror, 5...・Anode, 6...graphite disk group, 7...cathode, 8...
... Central part, 9 ... Return path, 10.1
1... Magnet coil, 12... Mode suppression graphite disk, 13... Laser light.・' Knee, /

Claims (1)

【特許請求の範囲】[Claims] アノードとカソード間にグラファイトディスク群よシな
るレーザ細管を有するイオンレーザ装置において、前記
グラファイトディスク群の端部の細管部の放電電流密度
を特に高めるだめのマグネットコイルを備えたことを特
徴とするイオンレーザ装置。An ion laser device having a laser capillary tube such as a group of graphite disks between an anode and a cathode, characterized in that an ion laser device is provided with a magnet coil for particularly increasing the discharge current density in the capillary portion at the end of the group of graphite disks. laser equipment.
JP6318183A 1983-04-11 1983-04-11 Ion laser device Pending JPS59188987A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6318183A JPS59188987A (en) 1983-04-11 1983-04-11 Ion laser device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6318183A JPS59188987A (en) 1983-04-11 1983-04-11 Ion laser device

Publications (1)

Publication Number Publication Date
JPS59188987A true JPS59188987A (en) 1984-10-26

Family

ID=13221813

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6318183A Pending JPS59188987A (en) 1983-04-11 1983-04-11 Ion laser device

Country Status (1)

Country Link
JP (1) JPS59188987A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0360085A (en) * 1989-07-27 1991-03-15 Nec Corp Ion laser device
JPH0537056A (en) * 1991-07-29 1993-02-12 Toshiba Corp Gas laser oscillator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0360085A (en) * 1989-07-27 1991-03-15 Nec Corp Ion laser device
JPH0537056A (en) * 1991-07-29 1993-02-12 Toshiba Corp Gas laser oscillator

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