JPH0126196B2 - - Google Patents

Info

Publication number
JPH0126196B2
JPH0126196B2 JP58199708A JP19970883A JPH0126196B2 JP H0126196 B2 JPH0126196 B2 JP H0126196B2 JP 58199708 A JP58199708 A JP 58199708A JP 19970883 A JP19970883 A JP 19970883A JP H0126196 B2 JPH0126196 B2 JP H0126196B2
Authority
JP
Japan
Prior art keywords
solid
state laser
water
cooling water
laser oscillation
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
Application number
JP58199708A
Other languages
Japanese (ja)
Other versions
JPS6091685A (en
Inventor
Kibatsu Shinohara
Junichi Megata
Koi Ugajin
Harutake Masuko
Tamotsu Aihara
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.)
Nihon Koshuha Co Ltd
Original Assignee
Nihon Koshuha 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 Nihon Koshuha Co Ltd filed Critical Nihon Koshuha Co Ltd
Priority to JP19970883A priority Critical patent/JPS6091685A/en
Publication of JPS6091685A publication Critical patent/JPS6091685A/en
Publication of JPH0126196B2 publication Critical patent/JPH0126196B2/ja
Granted 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
    • H01S3/025—Constructional details of solid state lasers, e.g. housings or mountings
    • 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
    • H01S3/04—Arrangements for thermal management
    • H01S3/042—Arrangements for thermal management for solid state lasers
    • 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
    • H01S3/04—Arrangements for thermal management
    • H01S3/0407—Liquid cooling, e.g. by water
    • 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

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】 本発明は固体レーザ発振器に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solid state laser oscillator.

断面が楕円形を呈する空胴集光器内の楕円の両
焦点に該当する位置に、励起用ランプと固体レー
ザ発振棒を置き、その励起用ランプの発光エネル
ギを固体レーザ発振棒に集中させて励起させるこ
とは従来実施されて来ている。 An excitation lamp and a solid-state laser oscillation rod are placed at positions corresponding to both focal points of the ellipse in a cavity condenser with an elliptical cross section, and the emitted energy of the excitation lamp is concentrated on the solid-state laser oscillation rod. Excitation has been conventionally practiced.

第１図は固体レーザ発振器集光部の１つの構造
断面図である。ルビーやYAGその他の固体レー
ザ発振棒１が楕円形断面の集光器空胴３の一方の
焦点に置かれ、他方の焦点に励起用ランプ２を置
いてこの励起用ランプ２の発光エネルギで固体レ
ーザ発振棒を励起して、レーザ発振を生じさせて
いる。この集光器は角材４1，４2の対応面内に楕
円形の半分となる溝と穿ち、この両角材４1と４2
を合わせて締めつけ、パツキング５で水密を保つ
ている。 FIG. 1 is a cross-sectional view of one structure of a solid-state laser oscillator focusing section. A solid-state laser oscillation rod 1 such as ruby or YAG is placed at one focal point of a collector cavity 3 with an elliptical cross section, and an excitation lamp 2 is placed at the other focal point, and the emitted energy of this excitation lamp 2 is used to generate a solid state. The laser oscillation rod is excited to generate laser oscillation. This condenser is made by drilling a groove that is a half of an ellipse in the corresponding planes of the square bars 4 1 and 4 2 , and
Tighten them together and keep them watertight with packing 5.

第２図は固体レーザ発振器集光部の他の構造図
を示すもので、角材４1と４2の対応面内に楕円形
の半分となる溝を穿つたのち、両者を合わせて仮
止めして楕円形断面の集光器空胴３としたのち、
この両端を円形に削つて段を付け、ここに締付用
円環７を圧入して一体とし、角材４1と４2の外周
を円形に削つて仕上げる。この状態を第３図に示
している。同図Ａは縦断面図、同図Ｂは側面図で
ある。この構造では接合面からの水漏れがある
が、これは、後記第４図の構造図の如く、この集
光器を円筒６に納め、この円筒と側面８の間に水
密パツキング５を設けて、押えることで容易に解
決できる。 Figure 2 shows another structural diagram of the condensing part of a solid-state laser oscillator, in which a groove that is half an ellipse is cut in the corresponding planes of the square members 4 1 and 4 2 , and then the two are temporarily fixed together. After forming the condenser cavity 3 with an elliptical cross section,
Both ends are cut into a circular shape to form a step, and a tightening ring 7 is press-fitted into the step to integrate them, and the outer circumferences of the square pieces 4 1 and 4 2 are finished by cutting into a circular shape. This state is shown in FIG. Figure A is a longitudinal sectional view, and Figure B is a side view. In this structure, there is water leakage from the joint surface, but this can be solved by placing the condenser in a cylinder 6 and providing a watertight packing 5 between the cylinder and the side surface 8, as shown in the structural diagram in Fig. 4 below. , can be easily solved by pressing down.

この種の固体レーザ発振器では大きなエネルギ
を小さな容積内に放出するために、励起用ランプ
２、固体レーザ発振棒１および集光器内面を水で
冷却している。このために励起用ランプおよび固
体レーザ発振棒はガラス管内に入れ、これらとガ
ラス管との隙間に水を流している。 In this type of solid-state laser oscillator, the excitation lamp 2, the solid-state laser oscillation rod 1, and the inner surface of the condenser are cooled with water in order to emit a large amount of energy into a small volume. For this purpose, the excitation lamp and solid-state laser oscillation rod are placed inside a glass tube, and water is flowed into the gap between them and the glass tube.

従来はこの冷却水系統即ち励起用ランプ２と固
体レーザ発振棒１および集光器内面を直列に接続
して冷却していた。この直列冷却方式の内、最も
大きなエネルギを消費するのは励起用ランプであ
つて、このために必要な冷却水の水圧と流量が他
の部分にも加えられていた。必要となる水圧と流
量は通常５Kg/mm2、30／分程度である。このた
め従来の方式では、レーザ発振器が振動して出力
の光ビームの方向が安定でなく、騒音さえ発生し
ていた。 Conventionally, this cooling water system, that is, the excitation lamp 2, the solid-state laser oscillation rod 1, and the inner surface of the condenser were connected in series for cooling. In this serial cooling system, the excitation lamp consumes the most energy, and the water pressure and flow rate of the cooling water required for this is also applied to other parts. The required water pressure and flow rate are usually about 5Kg/mm 2 and 30/min. For this reason, in the conventional method, the laser oscillator vibrates, making the direction of the output light beam unstable and even generating noise.

本発明は上記に鑑み、励起用ランプと固体レー
ザ発振棒１および集光器内面に対する３つの冷却
水系統を並列にして、夫々への配分量を容易に設
定できる構成を提供することを目的とする。 In view of the above, an object of the present invention is to provide a configuration in which three cooling water systems for the excitation lamp, the solid-state laser oscillation rod 1, and the inner surface of the condenser are arranged in parallel, and the amount of water to be distributed to each can be easily set. do.

実験の結果、必要とする冷却エネルギは励起用
ランプ60％、固体レーザ発振棒30％、集光器内壁
が10％の程度であつた。従つて、冷却水の流量
が、この配分になるように並列給水を行えば、最
も効果的となる。 As a result of the experiment, the required cooling energy was approximately 60% for the excitation lamp, 30% for the solid-state laser oscillation rod, and 10% for the inner wall of the condenser. Therefore, it will be most effective if water is supplied in parallel so that the flow rate of cooling water is distributed in this manner.

第４図は本発明の実施例を示すもので、固体レ
ーザ発振棒１および励起用ランプ２はそれぞれガ
ラス管１６および１７の内部に納められ、その間
隙に冷却水が流れる。集光器は外部円筒６に納め
られ、これに側板８および９と冷却水部１０が取
り付けられている。 FIG. 4 shows an embodiment of the present invention, in which a solid-state laser oscillation rod 1 and an excitation lamp 2 are housed inside glass tubes 16 and 17, respectively, and cooling water flows into the gap between them. The concentrator is housed in an external cylinder 6 to which side plates 8 and 9 and a cooling water section 10 are attached.

冷却水部１０には、冷却水入口１１が設けられ
ていて、矢示方向に冷却水１２が流れ込む。この
冷却水の半ば以上はその冷却水路１１に端部が開
口するガラス管１７に直接流入して励起用ランプ
２の冷却に使われる。また冷却水の一部は通路１
３を通つて、側板８，９間に設けた流水溜１４に
入り、側板８を貫いて流水溜１４に端部が開口す
るガラス管１６と固体レーザ発振棒１との空隙に
流れ込む。 The cooling water section 10 is provided with a cooling water inlet 11, into which cooling water 12 flows in the direction of the arrow. More than half of this cooling water flows directly into a glass tube 17 whose end is open to the cooling water channel 11 and is used to cool the excitation lamp 2. Also, some of the cooling water is in the passage 1
3, enters a water reservoir 14 provided between the side plates 8 and 9, passes through the side plate 8, and flows into the gap between the solid-state laser oscillation rod 1 and a glass tube 16 whose end opens into the water reservoir 14.

流水溜１４と集光器空胴３′とは通路１５で結
ばれており、冷却水の一部が集光器内面を冷却す
るようになつている。そこで、流水溜１４と固体
レーザ発振棒１との水路１４′および集光器との
通路１５の隙間や直径を適当にすれば、冷却流量
を必要程度に納められる。 The flowing water reservoir 14 and the collector cavity 3' are connected by a passage 15, so that a portion of the cooling water cools the inner surface of the collector. Therefore, if the gaps and diameters of the water channel 14' between the water reservoir 14 and the solid-state laser oscillation rod 1, and the passage 15 between the condenser and the condenser are appropriately set, the cooling flow rate can be kept within the required level.

本発明は上記の構成であるから、必要流量は従
来の直列冷却方式に比し半分の15／分となり、
水圧も２〜2.5Kg/mm2と低減した。このために、冷
却水用ポンプも小形となり、固体レーザ発振器の
振動や騒音も激減し、レーザビームの照射方向の
ブレも無視できる程度となつた。３つの冷却水系
統の流量比も容易に選択できるので、冷却効果も
非常に上昇している。なお発生したレーザビーム
は放出口１８から放出される。 Since the present invention has the above configuration, the required flow rate is 15/min, which is half that of the conventional series cooling system.
Water pressure was also reduced to 2-2.5Kg/ mm2 . For this reason, the cooling water pump has also become smaller, the vibration and noise of the solid-state laser oscillator have been drastically reduced, and the deviation in the direction of laser beam irradiation has become negligible. Since the flow rate ratio of the three cooling water systems can be easily selected, the cooling effect is greatly improved. Note that the generated laser beam is emitted from the emission port 18.

上記説明において、第４図は冷却水の入口付近
の図であつて、冷却水出口付近もほぼ同様の構造
となるため、図面および説明は省略した。 In the above description, FIG. 4 is a diagram of the vicinity of the cooling water inlet, and since the vicinity of the cooling water outlet has almost the same structure, the drawing and explanation are omitted.

第４図は冷却水系統を第２，３図に示す外形が
円形の集光器に適用した場合について説明した
が、第１図に示す外形が角形の集光器についても
上記冷却水系統を同様に適用することができる。 Although Fig. 4 describes the case where the cooling water system is applied to the condenser with a circular external shape shown in Figs. The same can be applied.

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

第１図は固体レーザ発振器の集光器の構造図、
第２図・第３図Ａ，Ｂは他の集光器構造の説明
図、第４図は本発明固体レーザ発振器の冷却水系
統の説明図である。 １は固体レーザ発振棒、２は励起用ランプ、３
は楕円形集光器内壁、３′は同空胴、４，４1，４
２は集光器素材、５は水密用パツキング、６は外
部円筒、７は締付用円環、８，９は側板、１０は
冷却水部、１１は冷却水入口、１２は冷却水、１
３，１５は通路、１４は流水溜、１４′は水路、
１６は固体発振棒用ガラス管、１７は励振ランプ
用ガラス管、１８はレーザビームの放出口。 Figure 1 is a structural diagram of the condenser of a solid-state laser oscillator.
2 and 3A and 3B are explanatory diagrams of other condenser structures, and FIG. 4 is an explanatory diagram of a cooling water system of the solid-state laser oscillator of the present invention. 1 is a solid-state laser oscillation rod, 2 is an excitation lamp, 3
is the inner wall of the elliptical collector, 3' is the same cavity, 4, 4 1 , 4
2 is a concentrator material, 5 is a watertight packing, 6 is an external cylinder, 7 is a tightening ring, 8 and 9 are side plates, 10 is a cooling water section, 11 is a cooling water inlet, 12 is a cooling water, 1
3 and 15 are passages, 14 is a water reservoir, 14' is a waterway,
16 is a glass tube for a solid-state oscillation rod, 17 is a glass tube for an excitation lamp, and 18 is a laser beam emission port.

Claims (1)

【特許請求の範囲】 １ 横断面が楕円形を呈する空胴集光器の両焦点
に励起用ランプと固体レーザ発振棒を配置する固
体レーザ発振器において、 その空胴集光器の両端面に夫々側板８，９を環
状パツキング５を設けて二重に取付け、 その二重側板８，９間に楕円形空胴３′の長軸
方向に流水溜１４を設け、側板９に冷却水の入口
となる水路１１を設けた冷却水部１０を取付け、 その水路１１を側板９に設けた通路１３を通じ
て前記の流水溜１４に開通させ、 励起用ランプ２の外筒１７の端部を前記水路１
１に、また固体レーザ発振棒１の外管１６の端部
を流水溜１４に開口させ、空胴３′を通路１５で
流水溜１４に開通させ、 上記の固体レーザ発振棒と励起用ランプ並びに
楕円集光器内部の３個所に並列的に、必要な冷却
効果に応じて、冷却水流量を分流させる如く構成
したことを特徴とする固体レーザ発振器。[Claims] 1. In a solid-state laser oscillator in which an excitation lamp and a solid-state laser oscillation rod are arranged at both focal points of a cavity condenser having an elliptical cross section, the excitation lamp and the solid-state laser oscillation rod are arranged at both end faces of the cavity condenser, respectively. The side plates 8 and 9 are attached in a double manner with an annular packing 5, and a water reservoir 14 is provided between the double side plates 8 and 9 in the long axis direction of the elliptical cavity 3', and the side plate 9 is provided with an inlet for cooling water. A cooling water section 10 having a water channel 11 is installed, and the water channel 11 is opened to the water reservoir 14 through a passage 13 provided in the side plate 9, and the end of the outer cylinder 17 of the excitation lamp 2 is connected to the water channel 1.
1, the end of the outer tube 16 of the solid-state laser oscillation rod 1 is opened to the water reservoir 14, the cavity 3' is opened to the water reservoir 14 through the passage 15, and the above-mentioned solid-state laser oscillation rod, excitation lamp, and A solid-state laser oscillator characterized in that the cooling water flow rate is divided into three locations in parallel within an elliptical condenser depending on the required cooling effect.
JP19970883A 1983-10-25 1983-10-25 Solid-state laser oscillator Granted JPS6091685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19970883A JPS6091685A (en) 1983-10-25 1983-10-25 Solid-state laser oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19970883A JPS6091685A (en) 1983-10-25 1983-10-25 Solid-state laser oscillator

Publications (2)

Publication Number Publication Date
JPS6091685A JPS6091685A (en) 1985-05-23
JPH0126196B2 true JPH0126196B2 (en) 1989-05-22

Family

ID=16412285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19970883A Granted JPS6091685A (en) 1983-10-25 1983-10-25 Solid-state laser oscillator

Country Status (1)

Country Link
JP (1) JPS6091685A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4826493A (en) * 1971-08-07 1973-04-07

Also Published As

Publication number Publication date
JPS6091685A (en) 1985-05-23

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