JPH0789590B2 - Solid-state laser oscillator - Google Patents

Solid-state laser oscillator

Info

Publication number
JPH0789590B2
JPH0789590B2 JP4027186A JP4027186A JPH0789590B2 JP H0789590 B2 JPH0789590 B2 JP H0789590B2 JP 4027186 A JP4027186 A JP 4027186A JP 4027186 A JP4027186 A JP 4027186A JP H0789590 B2 JPH0789590 B2 JP H0789590B2
Authority
JP
Japan
Prior art keywords
laser rod
laser
annular portion
light
solid
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
JP4027186A
Other languages
Japanese (ja)
Other versions
JPS62199080A (en
Inventor
憲 石川
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP4027186A priority Critical patent/JPH0789590B2/en
Publication of JPS62199080A publication Critical patent/JPS62199080A/en
Publication of JPH0789590B2 publication Critical patent/JPH0789590B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01S3/04Arrangements for thermal management
    • H01S3/042Arrangements for thermal management for solid state lasers
    • 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
    • H01S3/05Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08Construction or shape of optical resonators or components thereof
    • 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
    • H01S3/04Arrangements for thermal management
    • H01S3/0407Liquid cooling, e.g. by water

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】 〔発明の目的〕 (産業上の利用分野) 本発明は固体レーザ発振装置に係り、特に共振器内に制
限開口を設けて低次発振モードの出力を得る固体レーザ
発振装置に関する。
The present invention relates to a solid-state laser oscillating device, and more particularly to a solid-state laser oscillating device that obtains an output in a low-order oscillation mode by providing a limiting aperture in a resonator. Regarding the device.

(従来の技術) 従来YAGレーザロッドと励起ランプとをレーザ発振ヘッ
ドの中に収容し、レーザロッドの光軸上に1〜2mm直径
の制限開口を有する制限開口体を設けたレーザ共振器を
用いて低次の発振モード出力を取り出すことが行なわれ
ている。低次の発振モードを高い出力で得るために、レ
ーザロッドを強力に励起すると、レーザロッドは外周部
が水冷されていることと、励起光がロッド内に吸収され
て発熱することによるレーザロッド内部の温度分布のた
めに、レーザロッドの光軸方向に通過するレーザ光は収
束作用を受けて、実用的な光励起レベルにおいては、平
均的な焦点距離で10cm程度短くなる。また低次の発振モ
ードを得るためにはレーザ発振に寄与するレーザロッド
はロッドの中心部のみに制限開口で規制される。すなわ
ち、レーザロッドの外周部分は発振に寄与しない部分が
生じる。しかしこの外周部も励起ランプからの光を吸収
するので上述した発熱による悪影響を増大させることに
なる。現在使用されているレーザロッドの外周面は表面
が光学的に粗面に仕上げられており、励起光が表面から
内部に入射するときに散乱するように作られていて、レ
ーザロッド断面内に均一に分散し、光励起するように考
えられている。またこれとは反対に、レーザロッドの外
周面が光学的に滑らかに仕上げられていて、上述の散乱
性をもたせないレーザロッドを使用することも一部では
試みられている。しかしこの表面が滑らかなレーザロッ
ドはレーザロッド内の光により励起されている強度が部
分的に強い所が生じ軸対称性が悪いという欠点がある。
軸対称性を失なわない程度に弱く光励起すると、レーザ
出力も十分な高出力が得られない。
(Prior Art) Conventionally, a laser resonator in which a YAG laser rod and an excitation lamp are housed in a laser oscillation head and a limiting aperture body having a limiting aperture with a diameter of 1 to 2 mm is provided on the optical axis of the laser rod is used. The low order oscillation mode output is taken out. When the laser rod is strongly excited in order to obtain a low-order oscillation mode with a high output, the laser rod has a water-cooled outer peripheral portion, and the excitation light is absorbed in the rod to generate heat, which causes heat generation inside the laser rod. Due to this temperature distribution, the laser light passing in the optical axis direction of the laser rod is subjected to a converging action, and at a practical photoexcitation level, the average focal length is shortened by about 10 cm. Further, in order to obtain a low-order oscillation mode, the laser rod that contributes to laser oscillation is restricted by the limiting opening only in the central portion of the rod. That is, the outer peripheral portion of the laser rod has a portion that does not contribute to oscillation. However, since this peripheral portion also absorbs the light from the excitation lamp, the above-mentioned adverse effects due to heat generation are increased. The outer peripheral surface of the laser rod currently in use has an optically rough surface, and is designed to scatter when excitation light enters the inside from the surface, and it is uniform within the laser rod cross section. It is believed that they are dispersed in and are photoexcited. On the contrary, there have been some attempts to use a laser rod whose outer peripheral surface is optically smooth and which does not have the above-mentioned scattering property. However, this laser rod having a smooth surface has a drawback that the intensity of the light excited by the light in the laser rod is partially high and the axial symmetry is poor.
If the light is weakly excited so as not to lose the axial symmetry, a sufficiently high laser output cannot be obtained.

(発明が解決しようとする問題点) 上記したように、冷却されたレーザロッドを用いて高出
力を得ようとすると励起ビームは収束され、また低次の
発振モードの場合は制限開口体を用いてレーザビームの
中心部だけを用いるのでレーザロッドの発振に寄与しな
い部分が生じ効率が悪く低次発振モードにおいては高出
力のものが得られない。
(Problems to be Solved by the Invention) As described above, when trying to obtain a high output by using a cooled laser rod, the excitation beam is focused, and in the case of a lower order oscillation mode, a limiting aperture is used. Since only the central portion of the laser beam is used, there is a portion that does not contribute to the oscillation of the laser rod and the efficiency is poor, and a high output cannot be obtained in the low order oscillation mode.

本発明は上述の不都合を解決するためになされたもの
で、低次の発振モードで高出力のレーザビームを発振す
る固体レーザ装置を提供することを目的とする。
The present invention has been made to solve the above-mentioned inconvenience, and an object thereof is to provide a solid-state laser device that oscillates a high-power laser beam in a low-order oscillation mode.

〔発明の構成〕[Structure of Invention]

(問題点を解決するための手段) 本発明はレーザロッドと、励起光源と、制限開口体と、
冷却する手段をもった固定レーザ発振装置において、レ
ーザロッドをその表面が粗面に形成された非光択環状部
と、表面が滑らかに仕上げられた光択環状部とで構成
し、共振器ミラーの位置を光択環状部における励起ビー
ム断面の径が非光択環状部における励起ビーム断面の径
より小なるように設定した固体レーザ発振装置である。
(Means for Solving Problems) The present invention provides a laser rod, an excitation light source, a limiting aperture body,
In a fixed laser oscillating device having a cooling means, a laser rod is composed of a non-selective annular portion having a rough surface and an optically selective annular portion having a smooth surface. Is a solid-state laser oscillator in which the diameter of the excitation beam cross section in the light-selective annular portion is set to be smaller than the diameter of the excitation beam cross-section in the non-selective annular portion.

(作用) 励起ビーム断面の径小な部分を光択環状部にこれより径
大な部分を非光択環状部に発生させるようにして光学的
な粗面により励起光が散乱する部分では断面全部を有効
に利用し、光学的に滑らかな部分では励起光をレーザロ
ッドの中心部に集中させ励起に寄与する部分に励起光を
有効に作用させるようにしたもので、非光択表面による
作用と光択表面による作用とを適宜組合わせて軸対称性
を損なわずに出力の向上を計ったものである。
(Operation) The smaller diameter portion of the excitation beam cross section is generated in the light selective annular portion, and the larger diameter portion is generated in the non-light selection annular portion. Is effectively utilized to concentrate the pumping light in the center of the laser rod in the optically smooth portion so that the pumping light can effectively act on the portion contributing to the pumping. The output is improved without impairing the axial symmetry by properly combining with the action of the photoselective surface.

(実施例) 以下、本発明の詳細を図示の実施例により説明する。第
1図は第1の実施例を示すもので、(1)はハウジング
で、内部に空所(2)が形成されている。この空所内に
楕円反射鏡(3)が設けられている。この楕円反射鏡
(3)の一方の焦点位置に放電管からなる励起光源
(4)が取付けられている。また他方の焦点位置にはレ
ーザロッド(5)が取付けられている。このレーザロッ
ド(5)は中央部が表面が粗面の非光択環状部(6)
(斜線部)となっていて、その両側端部が表面滑らかな
光択環状部(7),(8)に形成されている。このレー
ザロッド(5)は、ハウジング(1)の両端壁を貫通し
た両端開口した2個の支持体(10),(11)により液密
に固定されている。このレーザロッド(5)と同心にフ
ローパイプ(15)が取付けられていてハウジング(1)
に設けられた冷却水(16)の流入孔(17)と流出孔(1
8)とともに流路を画定している。そして冷却水は矢印
(19)で示すように、最初フローパイプ(15)の一端側
から入ってレーザロッド(5)を冷却しながら他端側に
至り、反転して励起光源(4)を冷却しながら流出口
(18)から出て行く。またレーザロッド(5)と同軸上
に共振器ミラー(21),(22)が対向して設けられてい
て、出力側の共振器ミラー(21)の近傍に直径3mmの開
口(23)をもった制限開口体(24)が配設されている。
その他発振のための電気回路があるが一般公知のものと
同様なので省略する。なお、フローパイプ(15)、冷却
水(16)、流入孔(17)、流出孔(18)とで冷却手段
(15a)を構成している。
(Examples) Details of the present invention will be described below with reference to the illustrated examples. FIG. 1 shows a first embodiment, in which (1) is a housing, and a void (2) is formed therein. An elliptical reflecting mirror (3) is provided in this void. An excitation light source (4) composed of a discharge tube is attached to one of the focal points of the elliptical reflecting mirror (3). A laser rod (5) is attached to the other focal position. This laser rod (5) has a rough surface in the central portion and a non-light-selecting annular portion (6).
(Shaded portions), and both end portions thereof are formed as light-selective annular portions (7) and (8) having smooth surfaces. The laser rod (5) is liquid-tightly fixed by two supports (10) and (11) which are open at both ends and penetrate both end walls of the housing (1). The housing (1) has a flow pipe (15) attached concentrically with the laser rod (5).
Cooling water (16) inlet (17) and outlet (1)
It also defines the flow path together with 8). Then, as shown by an arrow (19), the cooling water first enters from one end side of the flow pipe (15) to reach the other end while cooling the laser rod (5) and reverses to cool the excitation light source (4). While exiting from the outlet (18). Resonator mirrors (21) and (22) are provided coaxially with the laser rod (5) so as to face each other, and an opening (23) having a diameter of 3 mm is provided in the vicinity of the resonator mirror (21) on the output side. A restricted opening body (24) is provided.
There are other electric circuits for oscillation, but they are omitted because they are the same as those generally known. The flow pipe (15), the cooling water (16), the inflow hole (17) and the outflow hole (18) form a cooling means (15a).

以上のように本実施例は構成されているが、常法により
これを作動させた場合の特性につき述べる。第2図は入
出力特性を示すものであるが、いま横軸に入力Piを、縦
軸に出力Pをとると、制限開口体(24)がない場合は、
その出力特性は曲線(31)のようになり、レーザロッド
(5)が全長にわたり粗面仕上げされたものとほとんど
変わらない。しかし共振器内に制限開口体(24)を設け
た場合は、すなわち低次発振モードの場合は全面粗面の
従来のものは曲線(32)のようになり、本実施例のもの
は曲線(33)のようになる。すなわち、出力の向上があ
る。これはレーザロッド(5)断面において、第3図に
示すように、外周が滑らかな光択面に仕上げたものは光
択環状部(7),(8)側面から入射する励起光(3
5),(36)はレーザロッド(5)の中心に集中するよ
うに進んでレーザロッド(5)の中心部の励起強度を増
すこと、また第4図に示すようにレーザロッド(5)の
中間部の非光択環状部(6)に入射した励起光(37),
(38)は入射面において散乱され、レーザロッド(5)
内で散らばるからレーザロッド(5)の中心部において
は励起強度が弱まるためと考えられる。このような励起
強度分布においてレーザ発振させると、レーザロッド
(5)内の励起ビーム(39)の断面径は両端部の光択環
状部(7),(8)では中央部の非光択環状部(6)よ
りも小さい直径である。このため制限開口体(24)を挿
入すると、レーザロッド(5)の中心部のみから出力が
得られるから曲線(32)と曲線(33)で示すように差が
生じると考えられる。レーザロッド(5)の中央部にお
いては励起ビーム(39)の径が最大となるから断面内で
全体的に均一に光励起される方がレーザ出力をより大き
く取り出すことができる。
The present embodiment is configured as described above, and the characteristics when it is operated by a conventional method will be described. FIG. 2 shows the input / output characteristics. Now, when the input Pi is plotted on the horizontal axis and the output P is plotted on the vertical axis, when there is no limiting opening body (24),
The output characteristic is as shown by the curve (31), which is almost the same as that of the laser rod (5) which is roughened over its entire length. However, when the limiting aperture body (24) is provided in the resonator, that is, in the case of the low-order oscillation mode, the conventional one having a rough surface on the whole surface becomes a curve (32), and the one of this embodiment has a curve ( 33). That is, there is an improvement in output. As shown in FIG. 3, in the cross section of the laser rod (5), the one with the outer periphery finished to have a smooth light-selecting surface has excitation light (3) that enters from the side surfaces of the light-selecting annular portions (7) and (8).
5) and (36) proceed so as to concentrate on the center of the laser rod (5) to increase the excitation intensity of the central part of the laser rod (5). Also, as shown in FIG. Excitation light (37) incident on the non-selective annular part (6) in the middle part,
(38) is scattered at the incident surface and laser rod (5)
It is considered that this is because the excitation intensity is weakened in the central portion of the laser rod (5) because they are scattered inside. When the laser is oscillated in such an excitation intensity distribution, the cross-sectional diameter of the excitation beam (39) in the laser rod (5) becomes non-selective annular in the central portion in the optical selective annular portions (7) and (8) at both ends. It has a smaller diameter than the part (6). Therefore, when the limiting aperture body (24) is inserted, an output can be obtained only from the central portion of the laser rod (5), and it is considered that a difference occurs as shown by the curves (32) and (33). At the center of the laser rod (5), the diameter of the excitation beam (39) is maximized, so that a more uniform laser light excitation within the cross section allows a larger laser output to be extracted.

次に第2の実施例を第5図、第6図を参照して説明す
る。レーザロッド(41)を共振器ミラー(42),(43)
の間に非対称に配置し、レーザロッド(41)の一端から
ほぼ半分までを非光択環状部(45)に、残り半分を光択
環状部(46)に形成する。そして制限開口体(47)を共
振器ミラー(43)の前面に設けて構成した。このような
構成のものを励起した時の特性は第6図に示すようにな
る。まず制限開口体(47)を設けない場合は曲線(51)
のように、逆S字形の特性曲線が得られ入力の増加とと
もに出力が一度増加し、その後出力は低下し、再度出力
が立ち上がる。次に制限開口体(47)を設けると、曲線
(52)のような低次発振モードの出力が得られる。これ
に対し、レーザロッド(41)全面を粗面とし、制限開口
体(47)を設けたものは、曲線(53)のように曲線(5
2)より低い出力となる。この実施例の場合は、入力の
大きなP2近傍では、レーザロッド(41)の光択環状部
(46)の方が、励起ビーム(39)の断面は細径となって
いるので、レーザロッド(41)の中心部が強く励起さ
れ、この部分の発振がより大きく寄与して出力の増大が
計れたと考えられる。
Next, a second embodiment will be described with reference to FIGS. The laser rod (41) is connected to the resonator mirrors (42) and (43).
Are asymmetrically arranged between the two, and the laser rod (41) is formed in the non-selective annular portion (45) from one end to almost half thereof and in the other half in the selective light annular portion (46). The limiting aperture (47) is provided on the front surface of the resonator mirror (43). FIG. 6 shows the characteristics when exciting such a structure. First, if the limiting opening (47) is not provided, the curve (51)
As described above, an inverse S-shaped characteristic curve is obtained, and the output increases once as the input increases, then the output decreases and the output rises again. Next, when the limiting aperture body (47) is provided, the output of the low-order oscillation mode as shown by the curve (52) is obtained. On the other hand, in the case where the entire surface of the laser rod (41) is roughened and the limiting opening body (47) is provided, a curved line (5) is formed as the curved line (53).
2) Lower output. In the case of this embodiment, in the vicinity of P 2 where the input is large, the cross section of the excitation beam (39) in the laser selective ring portion (46) of the laser rod (41) has a smaller diameter. It is considered that the central part of (41) was strongly excited, and the oscillation of this part contributed more to increase the output.

〔発明の効果〕〔The invention's effect〕

以上詳述したように、本発明の固体レーザ発振装置は、
レーザロッドの表面を非光択環状部と光択環状部とで形
成し、励起ビームの断面が光択環状部で他の部分より径
小となるように共振器ミラーを配置したので、励起ビー
ムの径大部では断面均一に励起させ、径小部では中心部
に励起を集中させて、主として発振に寄与するレーザロ
ッドの部分に励起エネルギーを有効に投射するようにし
たので、出力向上に益するところ極めて大である。
As described in detail above, the solid-state laser oscillator of the present invention is
Since the surface of the laser rod is formed by the non-selective annular part and the selectable annular part, and the resonator mirror is arranged so that the cross section of the excitation beam is smaller in diameter than the other parts, the excitation beam In the large diameter part, the excitation is made uniform in the cross section, and in the small diameter part, the excitation is concentrated in the center part, so that the excitation energy is effectively projected to the part of the laser rod that mainly contributes to the oscillation. It is extremely large.

【図面の簡単な説明】[Brief description of drawings]

第1図は本発明の第1の実施例の断面正面図、第2図は
同じく第1の実施例の特性と従来例の特性との比較図、
第3図および第4図は同じく第1の実施例の作用説明
図、第5図は同じく第2の実施例の要部のみ示す正面
図、第6図は同じく第2の実施例の特性と従来例の特性
との比較図である。 (4)……励起光源、(5),(41)……レーザロッ
ド、 (6),(45)……非光択環状部、(7),(8),
(46)……光択環状部、 (15a)……冷却手段、(21),(22),(42),(4
3)……共振器ミラー、 (24),(47)……制限開口体、(39)……励起ビー
ム。
FIG. 1 is a sectional front view of the first embodiment of the present invention, and FIG. 2 is a comparison diagram of the characteristics of the first embodiment and the characteristics of the conventional example.
FIGS. 3 and 4 are also explanatory views of the operation of the first embodiment, FIG. 5 is a front view showing only essential parts of the second embodiment, and FIG. 6 is a characteristic view of the second embodiment. It is a comparison diagram with the characteristic of the conventional example. (4) ... Excitation light source, (5), (41) ... Laser rod, (6), (45) ... Non-selective annular part, (7), (8),
(46) …… Optical ring part, (15a) …… Cooling means, (21), (22), (42), (4
3) ... Resonator mirror, (24), (47) ... Restricted aperture, (39) ... Excitation beam.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】レーザロッドと、これを励起する励起光源
と、上記レーザロッド発振のための共振器ミラーと、上
記共振器ミラー間に挿入された低次発振モードのための
制限開口体と、上記レーザロッドおよび励起光源を冷却
する冷却手段とを有する固体レーザ発振装置において、
少なくとも光励起される部分における上記レーザロッド
は表面が粗面に形成された非光択環状部と滑らかに形成
された光択環状部とを有し上記共振器ミラーは上記光択
環状部における発振ビーム断面が上記非光択環状部にお
ける発振ビーム断面より小径に形成される位置に配設さ
れていることを特徴とする固体レーザ発振装置。
1. A laser rod, an excitation light source for exciting the laser rod, a resonator mirror for oscillating the laser rod, and a limiting aperture body inserted between the resonator mirrors for a low-order oscillation mode. In a solid-state laser oscillator having a cooling means for cooling the laser rod and the excitation light source,
The laser rod in at least a portion to be optically excited has a non-selective annular portion having a rough surface and an optically selective annular portion formed smoothly, and the resonator mirror is an oscillation beam in the selective optical portion. A solid-state laser oscillator, wherein the cross section is arranged at a position where the diameter is smaller than the cross section of the oscillation beam in the non-selective annular portion.
【請求項2】レーザロッドの両端部分が光択環状部に形
成され中間部が非光択環状部に形成されその両部分が光
励起されていることを特徴とする特許請求の範囲第1項
記載の固体レーザ発振装置。
2. A laser rod according to claim 1, wherein both end portions of the laser rod are formed into a light-selecting annular portion, an intermediate portion is formed into a non-light-selecting annular portion, and both portions are optically excited. Solid-state laser oscillator.
【請求項3】レーザロッドの中間部から一方端側を光択
環状部に他端側を非光択環状部に形成したことを特徴と
する特許請求の範囲第1項記載の固体レーザ発振装置。
3. A solid-state laser oscillating device according to claim 1, wherein one end side of the intermediate portion of the laser rod is formed as a light-selecting annular portion and the other end side is formed as a non-light-selecting annular portion. .
JP4027186A 1986-02-27 1986-02-27 Solid-state laser oscillator Expired - Lifetime JPH0789590B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4027186A JPH0789590B2 (en) 1986-02-27 1986-02-27 Solid-state laser oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4027186A JPH0789590B2 (en) 1986-02-27 1986-02-27 Solid-state laser oscillator

Publications (2)

Publication Number Publication Date
JPS62199080A JPS62199080A (en) 1987-09-02
JPH0789590B2 true JPH0789590B2 (en) 1995-09-27

Family

ID=12575971

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4027186A Expired - Lifetime JPH0789590B2 (en) 1986-02-27 1986-02-27 Solid-state laser oscillator

Country Status (1)

Country Link
JP (1) JPH0789590B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992003858A1 (en) * 1990-08-23 1992-03-05 Australian Electro Optics Pty. Ltd. Fibre bundle coupled circular slab laser system

Also Published As

Publication number Publication date
JPS62199080A (en) 1987-09-02

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