JPS6143877B2 - - Google Patents
Info
- Publication number
- JPS6143877B2 JPS6143877B2 JP8741080A JP8741080A JPS6143877B2 JP S6143877 B2 JPS6143877 B2 JP S6143877B2 JP 8741080 A JP8741080 A JP 8741080A JP 8741080 A JP8741080 A JP 8741080A JP S6143877 B2 JPS6143877 B2 JP S6143877B2
- Authority
- JP
- Japan
- Prior art keywords
- laser
- hole
- graphite
- center
- discharge
- 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
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 229910002804 graphite Inorganic materials 0.000 claims description 13
- 239000010439 graphite Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 description 3
- 238000010849 ion bombardment Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000001093 holography Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 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
- H01S3/02—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
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】
本発明は、グラフア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の中央孔８
のグラフアイトが粉末となつてくずれ、中央孔８
の穴径は徐々に大きくなり、ついにレーザ光１２
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をマ
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 achieve continuous oscillation with a Watts level of output in the visible range, so they can be used for Raman spectroscopy, holography, etc. It is widely used in 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, as a thin tube for an ion laser,
It is necessary to choose a material that can withstand ion bombardment 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 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 becomes powder and crumbles, and the center hole 8
The hole diameter gradually increases, and finally the laser beam 12
becomes larger than the maximum diameter required to make it a Gaussian beam (TEM 00 mode), and the laser beam 12 becomes multi-mode (mixed modes such as TEM 10 mode), which increases the coherency (coherency), which is a fundamental property of lasers. There is a problem of worsening sex.
本発明の目的は、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。 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.
本発明によれば、アノードとカソードならびに
これらアノードとカソード間にグラフアイトデイ
スク群を配置し、その中央孔の列によりレーザ細
管を構成したレーザ管と、全反射ミラーと出力ミ
ラーとを具備するイオンレーザ装置において、レ
ーザ管のグラフアイトデイスク群の端部のグラフ
アイトデイスクは、中央孔の周りに中央孔より孔
径の大きい放電用孔を複数個有することを特徴と
するイオンレーザ装置が得られる。 According to the present invention, a laser tube including an anode and a cathode and a group of graphite disks arranged between the anode and the cathode, a laser tube configured by a row of central holes, a total reflection mirror and an output mirror, is provided. An ion laser device is obtained in which the graphite disks at the ends of the group of graphite disks of the laser tube have a plurality of discharge holes around the center hole having a diameter larger than the center hole.
以下、第２図の一実施例について本発明を詳細
に説明する。 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。このレーザ管には、中央孔８の
まわりに中央孔８より孔径の大きい放電用の穴１
１があいたモード抑制グラフアイトデイスク１０
が設けられてており、中央孔８′より放電穴１１
の方が放電しやすいため、アノード５とカソード
７との間の放電はグラフアイトデイスク群６では
中央孔８で放電し、モード抑制グラフアイトデイ
スク１０では放電穴１１で放電する。従つて長時
間使用してもモード抑制グラフアイトデイスク１
０の中央孔８′はイオン衝撃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。このためレーザ光をガウスビーム
（TEM00モード）にするために必要な最大径より
大きくなることはなく、レーザ出力光は、長期間
にわたつてガウスビームを保持できる。 The laser tube 1 generates a discharge between an anode 5 and a cathode 7, oscillates with an optical resonator formed of an output mirror 3 and a total reflection mirror 4, and outputs a laser beam 12. In this laser tube, a discharge hole 1 having a diameter larger than the center hole 8 is provided around the center hole 8.
1 open mode suppression graphite disk 10
is provided, and the discharge hole 11 is connected to the central hole 8'.
Since it is easier to discharge, the discharge between the anode 5 and cathode 7 occurs in the central hole 8 in the graphite disk group 6, and in the discharge hole 11 in the mode suppressed graphite disk 10. Therefore, even if you use it for a long time, the mode will be suppressed.
Since the center hole 8' of No. 0 is not subjected to ion bombardment, it does not turn into powder and crumble, and the hole diameter of the center hole 8' remains unchanged. Therefore, the diameter does not become larger than the maximum diameter required to make the laser beam a Gaussian beam (TEM 00 mode), and the laser output light can maintain a Gaussian beam for a long period of time.
第１図は従来のイオンレーザ装置を示す断面
図、第２図ａは本発明の一実施例を示す（軸）断
面図、同図ｂはａ図のＡ，A′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′……中央孔、９……リターンパ
ス、１０……モード抑制グラフアイトデイスク、
１１……放電穴、１２……レーザ光。
FIG. 1 is a sectional view showing a conventional ion laser device, FIG. 2a is an (axial) sectional view showing an embodiment of the present invention, and FIG. 2b is a sectional view taken at A and A' in FIG. 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 hole, 9... Return path, 10... Mode suppression graphite disk,
11...discharge hole, 12...laser light.
Claims (1)
ラフアイトデイスクを間隔を置いて複数個縦続し
て配置し、中央孔の列によりレーザ細管を構成す
るイオンレーザ装置において、前記レーザ細管を
構成している端部のグラフアイトデイスクは、中
央孔の周りに中央孔より孔径の大きい放電用の孔
を有することを特徴とするイオンレーザ装置。1. In an ion laser device in which a plurality of graphite disks having a hole in the center are arranged in series at intervals between an anode and a cathode, and a laser thin tube is formed by a row of central holes, the laser thin tube is formed. An ion laser device characterized in that the graphite disk at the end has a discharge hole around the center hole, the hole diameter of which is larger than that of the center hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8741080A JPS5713785A (en) | 1980-06-27 | 1980-06-27 | Ion laser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8741080A JPS5713785A (en) | 1980-06-27 | 1980-06-27 | Ion laser device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5713785A JPS5713785A (en) | 1982-01-23 |
| JPS6143877B2 true JPS6143877B2 (en) | 1986-09-30 |
Family
ID=13914101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8741080A Granted JPS5713785A (en) | 1980-06-27 | 1980-06-27 | Ion laser device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5713785A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4910739A (en) * | 1988-03-21 | 1990-03-20 | Spectra-Physics | Adjustable aperture |
-
1980
- 1980-06-27 JP JP8741080A patent/JPS5713785A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5713785A (en) | 1982-01-23 |
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