JPS6120381A - Solid-state laser oscillation device - Google Patents

Solid-state laser oscillation device

Info

Publication number
JPS6120381A
JPS6120381A JP14158484A JP14158484A JPS6120381A JP S6120381 A JPS6120381 A JP S6120381A JP 14158484 A JP14158484 A JP 14158484A JP 14158484 A JP14158484 A JP 14158484A JP S6120381 A JPS6120381 A JP S6120381A
Authority
JP
Japan
Prior art keywords
light
excitation light
laser rod
flash lamp
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.)
Pending
Application number
JP14158484A
Other languages
Japanese (ja)
Inventor
Shinichi Imai
信一 今井
Ken Ishikawa
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 JP14158484A priority Critical patent/JPS6120381A/en
Publication of JPS6120381A publication Critical patent/JPS6120381A/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
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/0915—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light
    • H01S3/092—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp
    • H01S3/093—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp focusing or directing the excitation energy into the active medium
    • H01S3/0931—Imaging pump cavity, e.g. elliptical

Abstract

PURPOSE:To contrive to improve the laser performance by a method wherein the distribution of absorbing excited light within the cross-section of a laser rod is made uniform by enabling uniform irradiation over the whole laser rod with excited light. CONSTITUTION:A flash lamp 2 which emits excited light and the laser rod 3 are arranged in a light-collecting cylinder 1. In this case, the flash lamp 2 and the laser rod 3 are arranged on the first focus 4 of the light-collecting cylinder 1 and on its second focus 5, respectively. The light-emitting cylinder 1 is made of a photo-permeable substance formed out of e.g. a glass pipe 6 arranged on the inner surface side and transmitting the excited light, an excited-light reflection substance 7 which reflects excited light in arrangemet on the outer surface side of this glass pipe 6, and a reflected-substance protection layer 8 arranged on the outer surface side of the substance 7. Therefore, the excited light radiated out of the flash lamp 2 can be collected by uniform irradiation over the whole laser rod 3, regardless conditions of luminous distribution of excited light within the cross-section of the flash lamp 2.

Description

【発明の詳細な説明】 （発明の技術分野） この発明は励起光をレーザロッドに反射集光する集光筒
の構造を改良した固体レーザ発振ＫＷに関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a solid-state laser oscillation KW with an improved structure of a condenser tube that reflects and condenses excitation light onto a laser rod.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

従来から例えば楕円形状の集光局内の画然点位置にフラ
ッシュランプおよびレーザロッドをそれぞれ配設すると
ともに、集光筒の内面にコーティングまたはメッキ等の
手段でフラッシュランプから放射される励起光を反射す
る反射面を形成し、フラッシュランプから放射される励
起光を集光筒によってレーザロッドに反射集光する構成
の固体レーザ発振装置が知られている。Conventionally, for example, a flash lamp and a laser rod are arranged at distinct points in an elliptical focusing station, and the excitation light emitted from the flash lamp is reflected by means such as coating or plating on the inner surface of the focusing tube. A solid-state laser oscillation device is known that has a configuration in which a reflecting surface is formed, and excitation light emitted from a flash lamp is reflected and focused on a laser rod by a condensing tube.

ところで、上記従来構成のものにあってはフラッシュラ
ンプから放射される励起光は集光筒の反射面のみによっ
て反射されていたので、フラッシュランプの断面内にお
ける励起光の発光分布状態とレーザロッドの断面内にお
ける励起光の吸収分布状態とが対応する状態で励起光が
レーザロッドに集光されていた。そのため、レーザロッ
ドの中心部が強く励起され、フラッシュランプから放射
される励起光をレーザロッド全体に均一に照射集光させ
ることができない問題があったので、レーザロッドに熱
歪みが生じ易く、レーザ性能の向上を図るうえで問題が
あった。By the way, in the above conventional configuration, the excitation light emitted from the flash lamp was reflected only by the reflective surface of the condenser tube, so the emission distribution state of the excitation light within the cross section of the flash lamp and the laser rod The excitation light was focused on the laser rod in a state corresponding to the absorption distribution state of the excitation light within the cross section. As a result, the center of the laser rod is strongly excited, and the excitation light emitted from the flash lamp cannot be uniformly focused on the entire laser rod, which tends to cause thermal distortion in the laser rod, and the laser There were problems in trying to improve performance.

〔発明の目的） この発明はレーザロッド全体に均一に励起光を照射する
ことができ、レーザロッドの断面内における励起光の吸
収分布状態を均一化して、レーザ性能の向上を図ること
ができる固体レーザ発振装置を提供することを目的とす
るものである。[Object of the invention] The present invention provides a solid state that can uniformly irradiate the entire laser rod with excitation light, make the absorption distribution state of the excitation light uniform within the cross section of the laser rod, and improve laser performance. The object of the present invention is to provide a laser oscillation device.

〔発明の概要〕[Summary of the invention]

この発明はフラッシュランプおよびレーザロッドが内部
に配設され、フラッシュランプから放）１される励起光
をレーザ０ツドに反射集光する集光筒を内周面側に配設
され励起光を透過する透光性物質、この透光性物質の外
周面側に配設され励起光を反射する励起光反射物質およ
びこの励起光反射物質の外周面側に配設された反射物質
保護層によって形成したことを特徴とするものである。In this invention, a flash lamp and a laser rod are disposed inside, and a condenser tube is disposed on the inner circumference side to reflect and condense the excitation light emitted from the flash lamp onto the laser beam, and the excitation light is transmitted. a light-transmitting material that reflects the excitation light, an excitation light-reflecting material disposed on the outer peripheral surface of the light-transmitting material, and a reflective material protective layer disposed on the outer peripheral surface of the excitation light-reflecting material. It is characterized by this.

〔発明の実施例〕[Embodiments of the invention]

図面はこの発明の一実施例を示すものである。 The drawings show one embodiment of the invention.

第１図および第２図は固体レーザ発振装置の概略構成を
示すもので、１は楕円筒状に形成された集光筒である。FIGS. 1 and 2 schematically show the configuration of a solid-state laser oscillation device, and numeral 1 indicates a condenser tube formed into an elliptical cylinder shape.

この集光筒１の内部には励起光を発光するフラッシュラ
ンプ２およびレーザロッド３が配設されている。この場
合、フラッシュランプ２は集光筒１の第１の焦点４上に
、レーザロッド３は集光筒１の第２の焦点５上にそれぞ
れ配置されている。また、集光筒１は内周面側に配設さ
れ励起光を透過する例えばガラスパイプロ等によって形
成される透光性物質、このガラスパイプロの外周面側に
配設され励起光を反射する励起光反射物質７およびこの
励起光反射物質７の外周面側に配設された反射物質保護
層８によって形成されている。さらに、レーザロッド３
の光軸上にはレーザ共振器の高反射ミラー９および出力
ミラー１０がそれぞれ配設されている。なお、前記集光
筒１は軸方向に沿って２分割された第１および第２の画
構成部材１ａ、１ｂによって形成されており、これらの
第１および第２の画構成部材１ａ、１ｂが着脱可能に接
合される構成になっている。A flash lamp 2 and a laser rod 3 that emit excitation light are disposed inside the condenser tube 1. In this case, the flash lamp 2 is placed on the first focal point 4 of the condenser tube 1, and the laser rod 3 is placed on the second focal point 5 of the condenser tube 1. In addition, the condenser tube 1 is arranged on the inner circumferential side and transmits the excitation light, and includes a light-transmitting material formed by, for example, a glass pipero, and is arranged on the outer circumferential side of the glass pipero to reflect the excitation light. It is formed by an excitation light reflective material 7 and a reflective material protective layer 8 disposed on the outer peripheral surface of the excitation light reflective material 7. Furthermore, laser rod 3
A high reflection mirror 9 and an output mirror 10 of the laser resonator are arranged on the optical axis of the laser resonator. The light condensing tube 1 is formed by first and second image forming members 1a and 1b which are divided into two parts along the axial direction, and these first and second image forming members 1a and 1b are divided into two parts. It is configured to be removably joined.

そこで、上記構成のものにあ・）てはフラッシュランプ
２から励起光が放射されるとこの励起光がレーザロッド
３に照射される。この場合、励起光の一部は第１因中に
実線矢印で示すように直接レーザロッド３に照射される
。また、励起光の別の一部は同図中に点線矢印で示すよ
うにガラスパイプロの表面で反射しこの反射光がレーザ
ロッド３に照射され、励起光のさらに別の一部はガラス
パイプロの内部に一旦入射されたのちガラスパイプロの
内部で散乱反射されこの反射光がレーザロッド３に照射
される。さらに、残りの励起光は同図中に一点鎖線矢印
で示すようにガラスパイプロの内部に入射されこの入射
光が励起光反射物質７によって反射されたのちガラスパ
イプロの内部で散乱反射されてレーザロッド３に照射さ
れる。したがって、フラッシュランプ２がら放射された
励起光は上記各経路を介してレーザロッド３に照射され
るので、フラッシュランプ２の断面内における励起光の
発光分布状態が例えば第３図（△）に示すように中央部
分が強く両端部分が弱い場合であっても同図（Ｂ）に示
すようにレーザロッド３の断面内における励起光の吸収
分布状態を均一化することができ、フラッシュランプ２
の断面内における励起光の発光分布状態のいがんに係わ
らずフラッシュランプ２から放射される励起光をレーザ
ロッド３全体に均一に照射集光させることができる。そ
のため、レーザロッド３内の熱歪みを従来に比べて低減
することができ、熱レンズ効果および熱誘起複屈折効果
を軽減してレーザ出力ビームの高品質化を図ることがで
きるとともに、出力飽和現象の緩和を図ることができる
。また、集光筒１は軸方向に沿って２分割された第１お
よび第２の画構成部材１ａ、１ｂによって形成されてお
り、これらの第１および第２の画構成部材１ａ、１ｂが
着脱可能に接合される構成になっているので、フラッシ
ュランプ２の交換作業、或いは保守点検作業等の容易化
を図ることができる。Therefore, in the above configuration, when excitation light is emitted from the flash lamp 2, the laser rod 3 is irradiated with this excitation light. In this case, a part of the excitation light is directly irradiated onto the laser rod 3 as shown by the solid arrow in the first source. Another part of the excitation light is reflected by the surface of the glass pipe as shown by the dotted arrow in the figure, and this reflected light is irradiated onto the laser rod 3, and still another part of the excitation light is reflected by the glass pipe. After the light is once incident inside the glass pipe, it is scattered and reflected inside the glass pipe, and this reflected light is irradiated onto the laser rod 3. Furthermore, the remaining excitation light enters the inside of the glass piper as shown by the dashed-dotted line arrow in the same figure, and this incident light is reflected by the excitation light reflecting material 7 and is then scattered and reflected inside the glass piper. The laser rod 3 is irradiated. Therefore, the excitation light emitted from the flash lamp 2 is irradiated onto the laser rod 3 through each of the above-mentioned paths, so that the emission distribution state of the excitation light within the cross section of the flash lamp 2 is shown, for example, in FIG. 3 (△). Even if the center part is strong and both end parts are weak, the absorption distribution state of the excitation light in the cross section of the laser rod 3 can be made uniform as shown in FIG.
The excitation light emitted from the flash lamp 2 can be uniformly irradiated and focused on the entire laser rod 3 regardless of the state of emission distribution of the excitation light within the cross section. Therefore, the thermal distortion within the laser rod 3 can be reduced compared to the conventional one, and the thermal lens effect and thermally induced birefringence effect can be reduced to improve the quality of the laser output beam, and the output saturation phenomenon It is possible to alleviate the Further, the condenser tube 1 is formed by first and second image forming members 1a and 1b which are divided into two parts along the axial direction, and these first and second image forming members 1a and 1b can be attached and detached. Since the flash lamp 2 is configured to be able to be joined, it is possible to facilitate replacement work, maintenance and inspection work, etc. of the flash lamp 2.

なお、この発明は上記実施例に限定されるものではない
。例えば、ガラスパイプロにはレーザロッド３の活性物
質の吸収スペクトル域より短い波長のフラッシュランプ
２の放射光を吸収して前記吸収スペクトル域において蛍
光を発する物質を含有させる構成にしてもよく、この場
合にはレーザロッド３に悪影響を及ぼす短波長の光をガ
ラスパイプロによって吸収してレーザロッド３への励起
光を強め、レーザ発振効率を高めることができる。Note that this invention is not limited to the above embodiments. For example, the glass piper may be configured to contain a substance that absorbs the emitted light from the flash lamp 2 with a wavelength shorter than the absorption spectrum range of the active substance of the laser rod 3 and emits fluorescence in the absorption spectrum range. In such a case, short wavelength light that adversely affects the laser rod 3 can be absorbed by the glass pipe to intensify the excitation light to the laser rod 3, thereby increasing the laser oscillation efficiency.

さらに、ガラスパイプロの内面には光散乱用の微少な凹
凸面を備えた磨り面を形成してもよく、この場合にはレ
ーザロッド３に照射される励起光を一層効果的に均一化
することができる。また、集光筒１の透光性物質は円形
状のガラスパイプ等によって形成してもよく、さらにそ
の他この発明の要旨を逸脱しない範囲で種々変形実施で
きることは勿論である。Furthermore, a polished surface with minute irregularities for light scattering may be formed on the inner surface of the glass pipero, and in this case, the excitation light irradiated to the laser rod 3 can be uniformized more effectively. be able to. Further, the light-transmitting material of the condenser tube 1 may be formed of a circular glass pipe or the like, and it goes without saying that various other modifications can be made without departing from the gist of the present invention.

〔発明の効果〕〔Effect of the invention〕

この発明によればフラッシュランプおよびレーザロッド
が内部に配設され、フラッシュランプから放射される励
起光をレーザロッドに反射集光する集光筒を内周面側に
配設され励起光を透過する透光性物質、この透光性物質
の外周面に配設され励起光を反射する励起光反射物質お
よびこの励起光反射物質の外周面に配設された反射物質
保護層によって形成したので、レーザロッド全体に均一
に励起光を照射することができ、レーザロッドの断面内
における励起光の吸収分布を均一化して、レーザ性能の
向上を図ることができる。According to this invention, a flash lamp and a laser rod are disposed inside, and a condenser tube is disposed on the inner circumference side to reflect and condense excitation light emitted from the flash lamp onto the laser rod, and transmits the excitation light. Since it is formed of a light-transmitting material, an excitation light-reflecting material disposed on the outer peripheral surface of the light-transmitting material to reflect excitation light, and a reflective material protective layer disposed on the outer peripheral surface of the excitation light-reflecting material, the laser The entire rod can be uniformly irradiated with excitation light, and the absorption distribution of excitation light within the cross section of the laser rod can be made uniform, thereby improving laser performance.

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

同斜視図、第３図（Ａ）はフラッシュランプの断面内に
おける励起光の発光分布状態を示す特性図、同図（Ｂ）
はレーザロッドの断面内における励起光の吸収分布状態
を示す特性図である。 １・・・集光筒、２・・・フラッシュランプ、３・・・
レーザロッド、６・・・ガラスパイプ（透光性物質）、
７・・・励起光反射物質、８・・・反射物質保護層。 出願人代理人　弁理士　鈴江武彦 イ立遣−位遣−The same perspective view, FIG. 3 (A) is a characteristic diagram showing the emission distribution state of excitation light within the cross section of the flash lamp, and the same figure (B)
1 is a characteristic diagram showing an absorption distribution state of excitation light within a cross section of a laser rod. 1... Condenser tube, 2... Flash lamp, 3...
Laser rod, 6...Glass pipe (translucent material),
7... Excitation light reflective material, 8... Reflective material protective layer. Applicant's representative Patent attorney Takehiko Suzue

Claims (4)

【特許請求の範囲】[Claims] （１）集光筒内にフラッシュランプおよびレーザロッド
が配設され、前記フラッシュランプから放射される励起
光を前記集光筒によって前記レーザロッドに反射集光す
る固体レーザ発振装置において、前記集光筒を内周面側
に配設され励起光を透過する透光性物質、この透光性物
質の外周面側に配設され励起光を反射する励起光反射物
質およびこの励起光反射物質の外周面側に配設された反
射物質保護層によって形成したことを特徴とする固体レ
ーザ発振装置。(1) A solid-state laser oscillation device in which a flash lamp and a laser rod are disposed in a condenser tube, and excitation light emitted from the flash lamp is reflected and focused on the laser rod by the condenser tube. A light-transmitting material arranged on the inner peripheral surface of the tube and transmitting excitation light, an excitation light-reflecting material arranged on the outer peripheral surface of the light-transmitting material and reflecting the excitation light, and an outer periphery of the excitation light-reflecting material. A solid-state laser oscillation device characterized in that it is formed by a reflective material protective layer disposed on the surface side. （２）透光性物質はレーザロッドの活性物質の吸収スペ
クトル域より短い波長のフラッシュランプの放射光を吸
収して前記吸収スペクトル域において蛍光を発する物質
を含有するものであ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) The light-transmitting material is characterized in that it contains a material that absorbs the flash lamp radiation light having a wavelength shorter than the absorption spectrum range of the active substance of the laser rod and emits fluorescence in the absorption spectrum range. A solid-state laser oscillation device according to claim (1). （３）透光性物質は内面に磨り面が形成されたものであ
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。(3) The solid-state laser oscillation device according to claim (1), wherein the transparent material has a polished surface formed on its inner surface. （４）透光性物質はガラスパイプによって形成されたも
のであることを特徴とする特許請求の範囲第（１）項乃
至第（３）項のうちのいずれかに記載の固体レーザ発振
装置。(4) The solid-state laser oscillation device according to any one of claims (1) to (3), wherein the light-transmitting material is formed of a glass pipe.
JP14158484A 1984-07-09 1984-07-09 Solid-state laser oscillation device Pending JPS6120381A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14158484A JPS6120381A (en) 1984-07-09 1984-07-09 Solid-state laser oscillation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14158484A JPS6120381A (en) 1984-07-09 1984-07-09 Solid-state laser oscillation device

Publications (1)

Publication Number Publication Date
JPS6120381A true JPS6120381A (en) 1986-01-29

Family

ID=15295395

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14158484A Pending JPS6120381A (en) 1984-07-09 1984-07-09 Solid-state laser oscillation device

Country Status (1)

Country Link
JP (1) JPS6120381A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008413A1 (en) * 1989-01-13 1990-07-26 Tosoh Corporation Solid laser
US5172388A (en) * 1991-07-23 1992-12-15 International Business Machines Corporation Method and apparatus for an increased pulse repetition rate for a CW pumped laser
US5233624A (en) * 1992-09-30 1993-08-03 International Business Machines Corporation Method and apparatus for an increased output for a pumped laser using a moving aperture

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721917A (en) * 1971-06-17 1973-03-20 V Fisher Gas-discharge devices for optical pumping of lasers
JPS4917539A (en) * 1972-06-14 1974-02-16

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721917A (en) * 1971-06-17 1973-03-20 V Fisher Gas-discharge devices for optical pumping of lasers
JPS4917539A (en) * 1972-06-14 1974-02-16

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990008413A1 (en) * 1989-01-13 1990-07-26 Tosoh Corporation Solid laser
US5134626A (en) * 1989-01-13 1992-07-28 Tosoh Corporation Solid laser generator
US5172388A (en) * 1991-07-23 1992-12-15 International Business Machines Corporation Method and apparatus for an increased pulse repetition rate for a CW pumped laser
US5233624A (en) * 1992-09-30 1993-08-03 International Business Machines Corporation Method and apparatus for an increased output for a pumped laser using a moving aperture

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