JPS6080286A - External mirror type gas laser tube - Google Patents

External mirror type gas laser tube

Info

Publication number
JPS6080286A
JPS6080286A JP18884083A JP18884083A JPS6080286A JP S6080286 A JPS6080286 A JP S6080286A JP 18884083 A JP18884083 A JP 18884083A JP 18884083 A JP18884083 A JP 18884083A JP S6080286 A JPS6080286 A JP S6080286A
Authority
JP
Japan
Prior art keywords
laser
tube
laser tube
center
external mirror
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
JP18884083A
Other languages
Japanese (ja)
Inventor
Shigeru Nakamura
茂 中村
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.)
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki 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 Tokyo Keiki Co Ltd filed Critical Tokyo Keiki Co Ltd
Priority to JP18884083A priority Critical patent/JPS6080286A/en
Publication of JPS6080286A publication Critical patent/JPS6080286A/en
Pending legal-status Critical Current

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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
    • H01S3/038—Electrodes, e.g. special shape, configuration or composition
    • 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
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
    • H01S3/083—Ring lasers

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

Abstract

PURPOSE:To obtain the titled laser suitable for ring laser gyroscope by a method wherein a discharge outlet is provided in the neighborhood of the center of a laser fine tube, and anodes in the neighborhood of Brewster windows at both ends, respectively; then the discharge outlet is arranged at the center of the cylindrical cathode in a vacuum casing. CONSTITUTION:The anode 5' is buried also in the neighborhood of the Brewster window 3' of the laser fine tube 1, anodes thus being provided in a total of two, and the discharge outlet 2'' is arranged at the center of the anode 6, i.e., nearly at the center of the fine tube. The construction of other parts is almost the same as that of the conventional laser tube. This construction brings gas flows 12 and 12' due to DC discharge which direct to the cathode from the anodes 5 and 5' in symmetry, and therefore the variation in the frequency of a laser beam passing through the laser fine tube is cancelled. Accordingly, in the case of constructing the external mirror type ring laser gyro, a piece of laser tube is sufficient, and the structure and the adjustment of the device are simplified.

Description

【発明の詳細な説明】 本発明は、外部ミラ１形ガスレーザ管、特に外部ミラ１
形リングレーザジャイロに用いて好適な外部ミラ１形ガ
スレーザ管に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an external mirror 1 type gas laser tube, particularly an external mirror 1 type gas laser tube.
The present invention relates to an external mirror type 1 gas laser tube suitable for use in a type ring laser gyro.

本発明の説明に先だち、従来のこの種外部ミラ一形ガス
レーザ管の一例を、第１図を参照して説明する。第１図
に於て、（１）及び（１′）は夫々レーザ細管で、一方
は他方に比して長くなゲζいる。Prior to explaining the present invention, an example of a conventional gas laser tube with one external mirror of this type will be explained with reference to FIG. In FIG. 1, (1) and (1') are laser tubes, one of which has a longer length than the other.

両レーザ細管＜ＩＪ、（１，’）は、両者間にギャップ
（２）を以っ゛ζ同軸上に配列されている。夫々のレー
ザ細管（１）、（１’）の外側開口端には、それ等を密
封する如くブリュースタ窓（３）及び（３′）が夫々設
けられている。両レーザ細管（１）、（１’）より大径
の真空外囲器（４）を、両し−ザ細ｇ（１）、＜　１　
’）と同軸に配し１、その一端部を一方のレーザ細管（
１）の外周に気密に封着し、その他端部を他方のレーザ
細管（１′）の外周に気密に封着する。この場合、レー
ザ細管ｉｌｌはレーザ細管（１′）に比しζ長いので、
ギャップ（２）は、真空外囲器（引に関して、一方、即
ちレーザ細管（１′）側に偏っている。更に、真空外囲
器（４）内に、レーザ細管（１）を包囲する如く、筒状
の陰極（カソード）（６）が配置されると共に、レーザ
細管（１１の外端、即ちブリュースタ窓（３）の近傍に
は、陽極（−Ｆノード）（５）が挿入固定される。かく
して、真空外囲器（４）、両レーザ細管ｉｌ＋、（１’
）及びブリュースタ窓（３１，（，３’）により削成さ
れる密封空間には、所定の気体（ガス）が封入されζい
る。尚、ギャップ（２）は、放電吹出口に供する。Both laser tubes <IJ, (1,') are coaxially arranged with a gap (2) between them. Brewster windows (3) and (3') are respectively provided at the outer open ends of the laser tubes (1) and (1') to seal them. Both laser thin tubes (1), (1') have a vacuum envelope (4) with a larger diameter than both laser thin tubes (1), (1'), and both laser thin tubes (1) and (1')
') and placed coaxially with the laser tube (1), and one end of the laser tube (
1), and the other end is hermetically sealed to the outer periphery of the other laser thin tube (1'). In this case, the laser tube ill is longer than the laser tube (1'), so
The gap (2) is biased towards one side, namely the laser capillary (1') side with respect to the vacuum envelope (with respect to the vacuum envelope). , a cylindrical cathode (6) is arranged, and an anode (-F node) (5) is inserted and fixed at the outer end of the laser tube (11), that is, near the Brewster window (3). Thus, the vacuum envelope (4), both laser tubes il+, (1'
) and the Brewster window (31, (, 3')), a predetermined gas is sealed in the sealed space.The gap (2) is provided as a discharge outlet.

向、図示せずも、レーザ細管＋１１．　（１’）と同軸
の延長上、ブリュースタ窓（３）、（３’）に対向し、
共振器を構成するミラーが夫々配置されている。Directly, although not shown, there is a laser tube +11. Coaxial extension of (1'), facing Brewster window (3), (3'),
Mirrors constituting the resonators are arranged.

上述の如き構成の従来の外部ミラ１形ガスレーザ管に於
て、アノード（５）及びカソード（６）間に、例えば所
定の直流電圧を印加すれば、周知の如く、所望のレーザ
光が得られるものである。In the conventional external mirror type 1 gas laser tube configured as described above, by applying, for example, a predetermined DC voltage between the anode (5) and cathode (6), the desired laser light can be obtained, as is well known. It is something.

病で、か＼るレーザ管で、より大きい出力、即らより強
いレーザ光を得るためには、例えば、ブリュースタ窓（
３＋、（３つが、正確なブリュースタ角を以ゲζ両レー
ザ細管（１１，（１’）の外側開口端に設けられること
、及び両ブリュースタ窓（３）。In order to obtain a larger output power, that is, a stronger laser beam, with a laser tube, for example, a Brewster window (
3+, (three are provided at the outer open ends of both laser capillaries (11, (1') with the correct Brewster angle, and both Brewster windows (3).

（３′）間に相互のよじれが小さいことが、必要である
。(3') It is necessary that the mutual twist between them be small.

第１図にボずガスレーザ管に於ては、ブリュースタ窓（
３）、（３’）を、正確なブリュースタ角を以っ°Ｃレ
ーザ細管（１１，（１’）に夫々設けることは比較的容
易であるが、レーザ細管＋１）、（１’）が別体なので
、両ブリュースタ窓（３）、（３’）間の相互のよじれ
を小さくすることは、可成り困難であるとパう欠点があ
る。Figure 1 shows the Brewster window (
It is relatively easy to provide 3) and (3') in the °C laser tube (11, (1'), respectively) with accurate Brewster's angle, but if the laser tube +1) and (1') are Since they are separate pieces, there is a drawback that it is quite difficult to reduce the mutual twist between the two Brewster windows (3), (3').

第１図のガスレーザ管の上述した欠点を回避したガスレ
ーザ管として、第２図に承ず如き外部ミラ１形ガスレー
ザ管か提案され“ζいる。この第２図に示すガスレーザ
管は、両端にブリュースタ窓（３１，（３’）を有する
１本のレーザ細管＋１１のみを使用し、その真空外囲器
（４）内で、第１図の例のギャップ（２）に略々対応す
る位置に、放電吹出穴（２′）が設りである以外は、第
１図に示すものと略々同一である。従って、それ等の部
分には、第１図と同一の符号を付し、それ等のｉ′を細
な説明は、省略する。As a gas laser tube that avoids the above-mentioned drawbacks of the gas laser tube shown in FIG. 1, an external mirror type 1 gas laser tube as shown in FIG. 2 has been proposed.The gas laser tube shown in FIG. Only one laser tube +11 with a star window (31, (3')) is used, and in its vacuum envelope (4) it is placed at a position approximately corresponding to the gap (2) in the example of FIG. , is almost the same as the one shown in Figure 1, except for the provision of a discharge outlet hole (2').Therefore, these parts are given the same reference numerals as in Figure 1. A detailed explanation of i' will be omitted.

この第２図に不ずガスレーザ管は、レーザ細管を一本に
したので、第１図のガスレーザ管の上述した欠点を回避
し得る。Since the gas laser tube shown in FIG. 2 has a single narrow laser tube, the above-mentioned drawbacks of the gas laser tube shown in FIG. 1 can be avoided.

第１図又は第２図に示したレーザ管を２個を用いて構成
した従来の外部ミラ１形リングレーザジャイロの１列を
第３図に示す。同図において、（ＬＴ−１）及び（ＬＴ
−１’）は同一のレーザ管を夫々ボす。１７）、（７’
）、（７”）はミラーで、これ等は、基台（９）上に、
それ等のｔＩｉ向が互いに１２０°の角度をなし、且つ
正三角形の頂点に在る如く配置され、光共振器を構成し
°ζいる。上記正三角形の各辺Ｑ・。FIG. 3 shows one row of a conventional external mirror type 1 ring laser gyro constructed using two laser tubes shown in FIG. 1 or 2. As shown in FIG. In the same figure, (LT-1) and (LT
-1') respectively blow the same laser tube. 17), (7'
), (7”) are mirrors, these are placed on the base (9),
Their tIi directions make an angle of 120° with each other and are arranged so as to be at the vertices of an equilateral triangle, forming an optical resonator. Each side of the equilateral triangle above is Q.

（１０’）、（１０’りは、レーザ光の光路を示す。光
路（１０’）、（１０”）上にレーザ管（ＬＴ−１）　
、（ＬＴ−１’）の光軸が夫々一致するように、配置さ
れている。(10') and (10') indicate the optical path of the laser beam. On the optical path (10') and (10'') is the laser tube (LT-1).
, (LT-1') are arranged so that their optical axes coincide with each other.

（８）は基台（９）上に配置した反射プリズムで、ミラ
ー（，７′りよりの反時計回りのレーザ光を反射し、こ
の反射レーザ光をミラー（７′りの背面においζ、時計
回りのレーザ光と混合し、干渉縞を作ることにより、基
台（９）の紙面に垂直な軸回りの回転角速度出力に対応
した出力を得゛ζいる。(8) is a reflecting prism placed on the base (9), which reflects the counterclockwise laser beam from the mirror (, 7'), and directs this reflected laser beam to the back side of the mirror (7'). By mixing it with clockwise laser light and creating interference fringes, an output corresponding to the rotational angular velocity output about the axis perpendicular to the plane of the paper of the base (9) is obtained.

第１図又は第２図に示した従来例のレーザ管においては
、直流放電により、第１図の破線（１１）でボした方向
にラングミュア−フロー効果と呼ばれるガスの流れが、
陽極（５）から陰極（６）に向って生じる。このレーザ
管を、外部ミラ１形リングレーザ、ジャイロに使用する
と、ガスの流れと同方向のレーザ光の発振周波数が、ガ
スの流れる速さに応じて変化し、結果とし”Ｃ角速度出
力に対し°ζ大きな誤差をもたらすことになる。In the conventional laser tube shown in FIG. 1 or 2, the direct current discharge causes a gas flow called the Langmuir flow effect in the direction indicated by the broken line (11) in FIG.
It occurs from the anode (5) to the cathode (6). When this laser tube is used in an external mirror type 1 ring laser or a gyro, the oscillation frequency of the laser beam in the same direction as the gas flow changes depending on the gas flow speed, resulting in "C angular velocity output" °ζ This will result in a large error.

これを避けるため、第３図に示したように、光路（１０
’）、＜１０”）上に、例えば第１図にボしたレーザ管
を２本配置し、上記の影響を互いに打−ち消すようにし
°ζいる。しかし乍ら、この場合は、次の如き欠点があ
った。＋１）、２本のレーザ管が必要であること、１２
１．　２本のレーザ管を夫々止しく調整しなければなら
ないこと、（３）、ラングミュア−フロー効果を正しく
打ち消すために、夫々のレーザ管の封入ガス圧を同一に
し、放電電極間距離を同一にする等により、２本のレー
ザ管の放電電流を正確に合わせる必要があること等。In order to avoid this, the optical path (10
For example, two laser tubes as shown in Fig. 1 are placed on top of the laser tube (<10") in order to cancel out the above effects. However, in this case, the following There were disadvantages such as +1), the need for two laser tubes, and 12
1. (3) In order to properly cancel the Langmuir flow effect, the gas pressure in each laser tube must be the same and the distance between the discharge electrodes must be the same. For example, it is necessary to precisely match the discharge currents of the two laser tubes.

従っ゛Ｃ１本発明の主目的は、上述した欠点を一掃し得
る新規な外部ミラ１形ガスレーザ管を提供せんとするも
のである。Therefore, the main object of the present invention is to provide a new external mirror type 1 gas laser tube that can eliminate the above-mentioned drawbacks.

本発明による外部ミラ１形ガスレーザ管の要旨は、１本
のレーザ細管と１個の円筒形陰極を含む真空外囲器とを
同軸状に配置し上記レーザ細管の両端にブリュースタ窓
を設けた外部ミラ１形ガスレーザ管においζ、上記レー
ザ細管の中央イ」近に放電吹出穴を設け、上記レーザ細
管の両端の上記ブリュースタ窓近傍に夫々陽極を設け、
上記真空外囲器に含まれる上記円筒形陰極の中央に上記
放電吹出穴がくるように上記真空外囲器を取りつけたこ
とにある。The gist of the external mirror type 1 gas laser tube according to the present invention is that one laser tube and a vacuum envelope including one cylindrical cathode are arranged coaxially, and Brewster windows are provided at both ends of the laser tube. In the external mirror 1 type gas laser tube, a discharge outlet hole is provided near the center of the laser capillary tube, and anodes are provided near the Brewster window at both ends of the laser capillary tube,
The vacuum envelope is attached so that the discharge outlet is located in the center of the cylindrical cathode included in the vacuum envelope.

次に、上述した特徴を有する本発明による外部ミラ１形
ガスレーザ管の一例を、第４図を参照して説明しよう。Next, an example of an external mirror type 1 gas laser tube according to the present invention having the above-mentioned characteristics will be explained with reference to FIG.

面、同図に於て、第１図及び第２図と同一符号は、互い
に同一素子を示し、それ等のＲ’ｆ細な説明は、これを
省略する。In this figure, the same reference numerals as in FIGS. 1 and 2 indicate the same elements, and a detailed explanation thereof will be omitted.

本発明に於ては、第４図に示す如く１本のレーザ細管（
１）の他方の外端、即ちブリュースタ窓（３′）の近傍
にも、アノード（５′）を埋設し、都合２個のアノード
を設けると共に、放電吹出穴を、（２″）で示ず如く、
レーザ細管１１）の略々中央部、即ちカソード（６）の
銘々中央部に位置せしめる。本発明のその他の構成は、
第２図に示す従来例と、略々同一である。In the present invention, one laser tube (
An anode (5') is also buried in the other outer end of 1), that is, near the Brewster window (3'), and a total of two anodes are provided. Zu like,
It is located approximately at the center of the laser thin tube 11), that is, at the center of the cathode (6). Other configurations of the present invention include:
This is substantially the same as the conventional example shown in FIG.

上述した本発明の外部ミラ１形ガスレーザ管によれば、
直流放電による陽極（５１，（５’）から陰極（６）へ
向う気体の流れ（ラングミュア−フロー）が、第４図の
破線（１２）　、（１２’）でンバず様に左右対称とな
るため、レーザ細管（１１を通過するレーザ光の周波数
変化が相殺される。従って、第４図に示す本発明のレー
ザ管を用い°ζ外部ミラー一形ングレーザジャイロを構
成する場合、従来と異なり２本のレーザ管を使う必要が
なく、１本のレーザ管で十分であり、従来に比し、構造
が簡素になり、調整が簡単になる等の特長を有する。According to the external mirror 1 type gas laser tube of the present invention described above,
The flow of gas (Langmuir flow) from the anode (51, (5') to the cathode (6) due to DC discharge becomes symmetrical as shown by the broken lines (12) and (12') in Figure 4. Therefore, the frequency change of the laser beam passing through the laser tube (11) is canceled out. Therefore, when constructing a laser gyro with one external mirror using the laser tube of the present invention shown in FIG. There is no need to use two laser tubes; one laser tube is sufficient, and compared to the conventional method, the structure is simpler and adjustment is easier.

その他、本発明の要旨を逸脱せずに、多くの変化変更が
当該業者により成され得ることは、明らかであろう。It will be apparent that many other changes and modifications may be made by those skilled in the art without departing from the spirit of the invention.

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

第１図及び第２図は夫々従来の外部ミラ１形ガスレーザ
管のＷｒ面図、第３図は従来の外部ミラ１形リングレー
ザジャイロの一例の路線図、第４１ス１は本発明の外部
ミラ１形ガスレーザ管の一例の断面図である。 図に於て、（１）ばレーザ細管、（２”）は放電吹出穴
、１３１．　（３’）はブリュースタ窓、（４）は真空
外囲器、（叱　（５′）は陽極、（６）は陰極を夫々ボ
す。 第１図 Ｏ 第２図 ４にイ ク− 第格図1 and 2 are Wr side views of a conventional external mirror 1 type gas laser tube, FIG. 3 is a route diagram of an example of a conventional external mirror 1 type ring laser gyro, and No. 41 is an external view of the external mirror 1 of the present invention. FIG. 2 is a cross-sectional view of an example of a Mira 1 type gas laser tube. In the figure, (1) is the laser tube, (2'') is the discharge outlet, 131. (3') is the Brewster window, (4) is the vacuum envelope, (5' is the anode, (6) opens the cathode respectively. Figure 1 O Figure 2 Go to 4 - Case diagram

Claims (1)

【特許請求の範囲】[Claims] １本のレーザ細管と１個の円筒形陰極を含む真空外囲器
とを同軸状に配置し上記レーザ細管の両端にブリュース
タ窓を設けた外部ミラ１形ガスレーザ管においζ、上記
レーザ細管の中央付近に放電吹出穴を設け、上記レーザ
細管の両端の上記ブリュースタ窓近傍に夫々陽極を設け
、上記真空外囲器に含まれる上記円筒形陰極の中央に上
記放電吹出穴がくるように上記真空外囲器を取りつけた
ことを特徴とする外部ミラ１形ガスレーザ管。In an external mirror type 1 gas laser tube in which one laser tube and a vacuum envelope including one cylindrical cathode are arranged coaxially and Brewster windows are provided at both ends of the laser tube, A discharge outlet hole is provided near the center, an anode is provided near the Brewster window at both ends of the laser thin tube, and the discharge outlet hole is placed in the center of the cylindrical cathode included in the vacuum envelope. External Mira 1 type gas laser tube characterized by being equipped with a vacuum envelope.
JP18884083A 1983-10-07 1983-10-07 External mirror type gas laser tube Pending JPS6080286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18884083A JPS6080286A (en) 1983-10-07 1983-10-07 External mirror type gas laser tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18884083A JPS6080286A (en) 1983-10-07 1983-10-07 External mirror type gas laser tube

Publications (1)

Publication Number Publication Date
JPS6080286A true JPS6080286A (en) 1985-05-08

Family

ID=16230757

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18884083A Pending JPS6080286A (en) 1983-10-07 1983-10-07 External mirror type gas laser tube

Country Status (1)

Country Link
JP (1) JPS6080286A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6457687A (en) * 1987-02-04 1989-03-03 Deutsche Forsch Luft Raumfahrt He-ne gas discharge tube

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS458895Y1 (en) * 1966-04-21 1970-04-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS458895Y1 (en) * 1966-04-21 1970-04-25

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6457687A (en) * 1987-02-04 1989-03-03 Deutsche Forsch Luft Raumfahrt He-ne gas discharge tube
JPH0529312B2 (en) * 1987-02-04 1993-04-30 Doitsuche Fuorushunkusanshutaruto Fuyuru Rufuto Unto Raumufuaaruto Ee Fuau

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