JPH0342709B2 - - Google Patents
Info
- Publication number
- JPH0342709B2 JPH0342709B2 JP20759187A JP20759187A JPH0342709B2 JP H0342709 B2 JPH0342709 B2 JP H0342709B2 JP 20759187 A JP20759187 A JP 20759187A JP 20759187 A JP20759187 A JP 20759187A JP H0342709 B2 JPH0342709 B2 JP H0342709B2
- Authority
- JP
- Japan
- Prior art keywords
- laser rod
- excitation light
- laser
- focal
- straight line
- 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
- 230000005284 excitation Effects 0.000 claims description 19
- 239000007787 solid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion 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
- H01S3/09—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】
［産業上の利用分野］
本発明は、ヤグ（YAG）レーザ、アレキサン
ドライトレーザ、ガラスレーザ等の固体レーザに
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to solid-state lasers such as YAG lasers, alexandrite lasers, and glass lasers.
［従来の技術］
固体レーザでは、楕円筒形反射集光鏡の一方の
焦点に直線型の放電管を配設し、他方の焦点にレ
ーザロツドを配設して、放電管から放射された励
起光をレーザロツドに集光・照射し、レーザロツ
ド内のYAG等のレーザ物質に対しポンピングを
行うようになつている。[Prior Art] In a solid-state laser, a linear discharge tube is arranged at one focal point of an elliptical cylindrical reflecting condenser mirror, a laser rod is arranged at the other focal point, and the excitation light emitted from the discharge tube is The laser beam is focused and irradiated onto the laser rod, and the laser material such as YAG inside the laser rod is pumped.
このレーザロツドへの集光効率を高めるため
に、従来では、横断面の楕円の長軸が一直線上に
あり、かつ、隣合う該楕円のそれぞれ一方の焦点
位置が一致するよう、単位楕円筒形反射集光鏡を
多重連設し、一つの焦点位置にレーザロツドを配
設し、他の焦点位置又はその付近に直線型の放電
管を配設していた（特公昭54−31357号公報）。 In order to increase the efficiency of condensing light to the laser rod, in the past, a unit elliptical cylindrical reflector was used so that the long axes of the ellipses in the cross section were on a straight line and the focal positions of each of the adjacent ellipses coincided. Multiple converging mirrors were arranged in series, a laser rod was placed at one focal position, and a straight discharge tube was placed at or near another focal position (Japanese Patent Publication No. 31357/1983).
［発明が解決しようとする問題点］
しかし、楕円筒形の反射集光鏡を用いているの
で、放電管の各点から全方向へ放射される励起光
のうち、放射管の軸に直角な方向へ進む励起光の
みしかレーザロツドに集光させることができず、
集光効率が極めて悪かつた。このため、大部分の
励起光は熱になつていた。[Problems to be Solved by the Invention] However, since an elliptical cylindrical reflecting condenser mirror is used, of the excitation light emitted in all directions from each point of the discharge tube, only a portion of the excitation light that is perpendicular to the axis of the discharge tube is used. Only the excitation light traveling in the direction can be focused on the laser rod,
Light collection efficiency was extremely poor. Therefore, most of the excitation light turned into heat.
本発明の目的は、上記問題点に鑑み、集光効率
の高い固体レーザを提供することにある。 SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a solid-state laser with high light collection efficiency.
［問題点を解決するための手段］
本発明では、反射集光鏡内にレーザロツド及び
励起光源を配設した固体レーザにおいて
該反射集光鏡は、複数の回転楕円体鏡の一方の
焦点群及び他方の焦点群がそれぞれ一直線上に並
ぶように、該回転楕円体鏡が多重連設され、
該レーザロツドは、一方の該一直線上に配設さ
れ、
該励起光源は、他方の該一直線上に配設されて
いることを特徴としている。[Means for Solving the Problems] In the present invention, in a solid-state laser in which a laser rod and an excitation light source are disposed within a reflective condenser mirror, the reflective condenser mirror includes one focal group of a plurality of spheroidal mirrors and The spheroidal mirrors are arranged in multiple rows so that the other focal groups are aligned on a straight line, the laser rod is arranged on one of the straight lines, and the excitation light source is arranged on the other straight line. It is characterized by being set up.
［実施例］
以下、図面に基づいて本発明の一実施例を説明
する。第１図はハウジングを省略した固体レーザ
の斜視図であり、第２図はこの固体レーザの横断
面図である。[Example] Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is a perspective view of a solid-state laser without a housing, and FIG. 2 is a cross-sectional view of this solid-state laser.
ハウジング１０の内面には反射集光鏡Ｍが形成
されている。この反射集光鏡Ｍは、回転楕円体鏡
１１〜１６が短軸方向へ多重連設されて構成され
ている。 A reflecting condenser mirror M is formed on the inner surface of the housing 10. This reflective condensing mirror M is configured by multiple spheroidal mirrors 11 to 16 arranged in series in the short axis direction.
回転楕円体鏡１１〜１６の一方の焦点群F1i（ｉ
＝１〜６）は一直線上にある。ハウジング１０の
長手方向両端部には、この一直線を中心とする支
持孔１８，２０が穿設されている。支持孔１８，
２０には直線型の放電管２２が挿通されている。
この挿通により、放電管２２の両端部がハウジン
グ１０に支持されている。放電管２２の両端面か
らは、電極Ｅ１，Ｅ２の一部が突出している。 One focal group F 1i (i
=1 to 6) are on a straight line. Support holes 18 and 20 are formed at both ends of the housing 10 in the longitudinal direction, and the support holes 18 and 20 are centered on this straight line. Support hole 18,
A linear discharge tube 22 is inserted through the tube 20 .
Through this insertion, both ends of the discharge tube 22 are supported by the housing 10. Parts of the electrodes E1 and E2 protrude from both end surfaces of the discharge tube 22.
また、回転楕円体鏡１１〜１６の他方の焦点群
F2i（ｉ＝１〜６）も一直線上にあり、ハウジング
１０の長手方向両端部には、この直線を中心とす
る支持孔２４，２６が穿設されている。支持孔２
４，２６にレーザロツド２８が挿通されて、レー
ザロツド２８の両端部がハウジング１０に支持さ
れている。 In addition, the other focal group of the spheroidal mirrors 11 to 16
F 2i (i=1 to 6) is also on a straight line, and support holes 24 and 26 centered on this straight line are bored at both ends of the housing 10 in the longitudinal direction. Support hole 2
A laser rod 28 is inserted through the rods 4 and 26, and both ends of the laser rod 28 are supported by the housing 10.
したがつて、放電管２２とレーザロツド２８と
は平行になつている。 Therefore, the discharge tube 22 and the laser rod 28 are parallel to each other.
回転楕円体鏡１１〜１６の各長軸は放電管２２
及びレーザロツド２８に直交している。また、焦
点群F1i（ｉ＝１〜６）の隣合う間隔及び焦点群F2i
（ｉ＝１〜６）の隣合う間隔は皆同一になつてい
る。 Each long axis of the spheroidal mirrors 11 to 16 corresponds to the discharge tube 22.
and perpendicular to the laser rod 28. Also, the distance between adjacent focal groups F 1i (i=1 to 6) and the focal group F 2i
The adjacent intervals of (i=1 to 6) are all the same.
レーザロツド２８の一端側には、レーザロツド
２８の軸と垂直に、反射率がほぼ100％の全反射
鏡３０が近設され、レーザロツド２８の他端側に
は、同じくレーザロツド２８の軸と垂直に、反射
率が例えば90％の出射鏡３２が近設されている。 A total reflection mirror 30 with a reflectance of approximately 100% is installed near one end of the laser rod 28, perpendicular to the axis of the laser rod 28, and a total reflection mirror 30 with a reflectance of approximately 100% is installed perpendicular to the axis of the laser rod 28, at the other end of the laser rod 28. An exit mirror 32 with a reflectance of, for example, 90% is provided nearby.
次に上記の如く構成された本実施例の動作を説
明する。 Next, the operation of this embodiment configured as described above will be explained.
電極Ｅ１，Ｅ２間に高電圧を印加して放電管２
２から励起光を放射させる。この励起光の一部
は、レーザロツド２８に直接照射される。 By applying a high voltage between the electrodes E1 and E2, the discharge tube 2
2 emits excitation light. A portion of this excitation light is directly irradiated onto the laser rod 28.
また、放電管２２の各焦点F1i（ｉ＝１〜６）及
びその付近から放射された励起光のうち、その焦
点が属する回転楕円体鏡で反射されたものについ
ては、第２図及び第２図の−線断面図である
第３図に示す如く、当該回転楕円体鏡の他方の焦
点及びその付近に集光され、レーザロツド２８に
照射される。 Furthermore, among the excitation light emitted from each focal point F 1i (i=1 to 6) of the discharge tube 22 and its vicinity, that reflected by the spheroidal mirror to which the focal point belongs is shown in FIG. As shown in FIG. 3, which is a cross-sectional view taken along the line 2 in FIG.
さらに、第２図に示す如く、総ての焦点F1i，
F2i（ｉ＝１〜６）を含む平面内及びその近傍の空
間内を進行する励起光は、総てレーザロツド２８
に照射される。 Furthermore, as shown in FIG. 2, all the focal points F 1i ,
The excitation light traveling in the plane containing F 2i (i = 1 to 6) and in the space near it is all transmitted to the laser rod 28.
is irradiated.
このようにして、レーザロツド２８内のレーザ
物質がポンピングされ、レーザロツド２８の軸方
向へ放射されるレーザ光が増幅され、その一部が
出射鏡３２を透過し、矢印Ｘ方向へ放射される。 In this way, the laser material within the laser rod 28 is pumped, and the laser light emitted in the axial direction of the laser rod 28 is amplified, and a portion of it is transmitted through the output mirror 32 and emitted in the direction of arrow X.
なお、上記実施例では、６個の回転楕円体鏡を
多重連設した場合を説明したが、連設個数は２個
以上であればよい。 In the above embodiment, the case where six spheroidal mirrors are arranged in multiple rows is explained, but the number of the mirrors to be arranged in series may be two or more.
また、上記実施例では、焦点群F1i（ｉ＝１〜
６）の隣合う間隔及び焦点群F2i（ｉ＝１〜６）の
隣合う間隔が等しい場合を説明したが、本発明は
一方の焦点群F1i（ｉ＝１〜６）が同一直線上にあ
り、他方の焦点群F1i（ｉ＝１〜６）が同一線上に
あればよく、異なる間隔であつてもよい。 Further, in the above embodiment, the focal group F 1i (i=1 to
Although the case in which the adjacent spacing in 6) and the adjacent spacing between the focal groups F 2i (i=1 to 6) are equal, the present invention provides a case in which one of the focal groups F 1i (i=1 to 6) is on the same straight line. , and the other focal group F 1i (i=1 to 6) need only be on the same line, or may be at different intervals.
さらに、各焦点F1i（ｉ＝１〜６）及びその付近
で高輝度となるように、複数の放電管を縦続接続
し、これらを電気的に並列接続して励起光源を構
成してもよい。この場合には、レーザロツド２８
への励起光の集光効率が更に高くなる。 Furthermore, a plurality of discharge tubes may be cascaded and electrically connected in parallel to form an excitation light source so that the brightness is high at each focal point F 1i (i=1 to 6) and its vicinity. . In this case, the laser rod 28
The efficiency of condensing excitation light to is further increased.
［発明の効果］
本発明に係る固体レーザでは、複数の回転楕円
体鏡の一方の焦点群及び他方の焦点群がそれぞれ
一直線上に並ぶように、該回転楕円体鏡を多重連
設して反射集光鏡を構成し、レーザロツドを一方
の該一直線上に配設し、励起光源を他方の該一直
線上に配設しているので、レーザロツドへの励起
光の集光効率が従来よりも高いという優れた効果
がある。[Effects of the Invention] In the solid-state laser according to the present invention, a plurality of spheroidal mirrors are arranged in multiple rows so that one focal group and the other focal group of the plurality of spheroidal mirrors are aligned in a straight line. Since the condensing mirror is configured, the laser rod is placed on one straight line, and the excitation light source is placed on the other straight line, the efficiency of focusing the excitation light onto the laser rod is higher than before. It has excellent effects.
このため、励起光源へ供給する電力を低減する
ことができるという効果が派生する。 This results in the effect that the power supplied to the excitation light source can be reduced.
第１図乃至第３図は本発明の一実施例に係り、
第１図はハウジング部を省略した固体レーザの斜
視図、第２図はこの固体レーザの縦断面図、第３
図は第２図の−線断面図である。
Ｍ：反射集光鏡、１０：ハウジング、１１〜１
６：回転楕円体鏡、１８，２０，２４，２６：支
持孔、２２：励起光源としての放電管、２８：レ
ーザロツド、３０：全反射鏡、３２：出射鏡、
F11〜16，F21〜26：焦点。
1 to 3 relate to an embodiment of the present invention,
Fig. 1 is a perspective view of the solid-state laser with the housing section omitted, Fig. 2 is a vertical cross-sectional view of this solid-state laser, and Fig. 3 is a longitudinal sectional view of the solid-state laser.
The figure is a sectional view taken along the line -- in FIG. M: Reflection condenser mirror, 10: Housing, 11-1
6: spheroid mirror, 18, 20, 24, 26: support hole, 22: discharge tube as excitation light source, 28: laser rod, 30: total reflection mirror, 32: emission mirror,
F 11-16 , F 21-26 : Focus.
Claims (1)
配した固体レーザにおいて 該反射集光鏡は、複数の回転楕円体鏡の一方の
焦点群及び他方の焦点群がそれぞれ一直線上に並
ぶように、該回転楕円体鏡が多重連設され、 該レーザロツドは、一方の該一直線上に配設さ
れ、 該励起光源は、他方の該一直線上に配設されて
いることを特徴とする固体レーザ。[Claims] 1. A solid-state laser in which a laser rod and an excitation light source are disposed within a reflecting condenser mirror, in which one focal group and the other focal group of a plurality of spheroidal mirrors are aligned in a straight line, respectively. The spheroidal mirrors are arranged in multiple rows so that they are lined up, the laser rod is arranged on one of the straight lines, and the excitation light source is arranged on the other straight line. solid state laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20759187A JPS6450584A (en) | 1987-08-21 | 1987-08-21 | Solid state laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20759187A JPS6450584A (en) | 1987-08-21 | 1987-08-21 | Solid state laser |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6450584A JPS6450584A (en) | 1989-02-27 |
| JPH0342709B2 true JPH0342709B2 (en) | 1991-06-28 |
Family
ID=16542304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20759187A Granted JPS6450584A (en) | 1987-08-21 | 1987-08-21 | Solid state laser |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6450584A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5015701B2 (en) * | 2006-09-12 | 2012-08-29 | パナソニック株式会社 | Laser irradiation device |
-
1987
- 1987-08-21 JP JP20759187A patent/JPS6450584A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6450584A (en) | 1989-02-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |