JPS63107080A - Internal total reflection type solid laser equipment - Google Patents
Internal total reflection type solid laser equipmentInfo
- Publication number
- JPS63107080A JPS63107080A JP25412286A JP25412286A JPS63107080A JP S63107080 A JPS63107080 A JP S63107080A JP 25412286 A JP25412286 A JP 25412286A JP 25412286 A JP25412286 A JP 25412286A JP S63107080 A JPS63107080 A JP S63107080A
- Authority
- JP
- Japan
- Prior art keywords
- laser
- main body
- light
- laser main
- type 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
Links
- 239000007787 solid Substances 0.000 title 1
- 150000002500 ions Chemical class 0.000 claims description 7
- 238000000862 absorption spectrum Methods 0.000 claims description 2
- 230000005284 excitation Effects 0.000 abstract description 15
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 230000010355 oscillation Effects 0.000 abstract description 3
- 239000013078 crystal Substances 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 229910052779 Neodymium Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 3
- 229910052724 xenon Inorganic materials 0.000 description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000002834 transmittance 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/0619—Coatings, e.g. AR, HR, passivation layer
- H01S3/0625—Coatings on surfaces other than the end-faces
-
- 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
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
- H01S3/0606—Crystal lasers or glass lasers with polygonal cross-section, e.g. slab, prism
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は内部全反射型固体レーザ装置、とくに装置の
簡素化、及びレーザビームの高品質化等に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a total internal reflection type solid-state laser device, and in particular to simplification of the device and improvement of the quality of the laser beam.
第８図ｆａ） （ｂ）は各々例えばレーザー学会研究会
報告、ＲＴＭ−８４−２７（１９８４）に示された従来
の全反射型固体レーザ装置を示す縦断面構成図及び横断
面構成図でアシ、図において（１）は内部全反射屋固体
レーザ本体で互いに平行な２つの光学的平滑面を有し、
断面が矩形をなす、（２）は紫外光除去用フィルター、
（３）は上記レーザ本体（１）を励起するだめの光源例
えばキセノンフラッシュランプ、（４）は上記フラッシ
ュツンブ（３）からの発光を上記レーザ本体（１）に照
射する反射装置、（５ａ）はレーザビーム全反射鏡、（
５ｂ）はレーザビーム部分反射鏡、（６）はレーザビー
ムである。Figure 8 fa) and (b) are a vertical cross-sectional configuration diagram and a cross-sectional configuration diagram showing a conventional total internal reflection solid-state laser device shown in, for example, the Laser Society Research Group Report, RTM-84-27 (1984). In the figure, (1) is a total internal reflection solid-state laser body with two optically smooth surfaces parallel to each other,
(2) is a filter for removing ultraviolet light, which has a rectangular cross section;
(3) is a light source such as a xenon flash lamp that excites the laser body (1); (4) is a reflection device that irradiates the laser body (1) with light emitted from the flash tube (3); (5a) ) is a laser beam total reflection mirror, (
5b) is a laser beam partial reflection mirror, and (6) is a laser beam.
次に動作について説明する。レーザ本体（１）は、励起
光源（３）から上記レーザ本体（１）へ向う直接光およ
び、反射装置によシ一度反射されたのちレーザ本体（１
）に向う上記励起光源（３）からの発光によう励起され
る。励起されたレーザ本体（１）はレーザビーム全反射
鏡（５ａ）とレーザビーム部分反射鏡（５ｂ）からなる
レーザ共振器によりレーザビーム（６）を生じ、上記レ
ーザビーム部分反射鏡（５ｂ）からレーザ共振器の外に
取υ出される。Next, the operation will be explained. The laser main body (1) receives direct light from the excitation light source (3) toward the laser main body (1), and the laser main body (1) after being reflected once by the reflection device.
) is excited by the light emitted from the excitation light source (3). The excited laser main body (1) generates a laser beam (6) through a laser resonator consisting of a laser beam total reflection mirror (5a) and a laser beam partial reflection mirror (5b), and a laser beam (6) is generated from the laser beam partial reflection mirror (5b). It is taken out of the laser cavity.
従来の内部全反射型固体レーザ装置は以上のように構成
されており、励起光源（３）による発光のスペクトル分
布は、例えば第４図に示すように紫外から赤外までの全
領域に広がっている。ところが上記レーザ本体（１）中
にドープされた活性イオンであるネオジムを励起するた
めの光の波長は第６図に示されるように約４００ｎｍか
ら９００ｎｍの範囲にしか存在しない、従って励起光の
他の波長の光は上記レーザ本体（１）の励起には役立た
ない、のみならず、上記レーザ本体（１）は紫外光照射
によシ着色される（ソーツリゼーション）ため、紫外光
を除去する必要がある。従って第８図に示されるように
、紫外光除去用フィルター（２）が上記レーザ本体（１
）と上記励起光源（３）の間に挿入されることが必要と
なっていた。A conventional total internal reflection type solid-state laser device is configured as described above, and the spectral distribution of light emitted by the excitation light source (3) spreads over the entire range from ultraviolet to infrared, as shown in Figure 4, for example. There is. However, the wavelength of light for exciting neodymium, which is an active ion doped in the laser body (1), exists only in the range of about 400 nm to 900 nm, as shown in FIG. Not only is light with a wavelength of There is a need. Therefore, as shown in FIG. 8, the ultraviolet light removal filter (2) is
) and the excitation light source (3).
また、第８図の構成のものにおいては、レーザ本体の励
起に寄与せず、レーザ本体の温度上昇の原因となる赤外
光がレーザ本体に照射、吸収される等の問題点があった
。Further, in the configuration shown in FIG. 8, there were problems such as infrared light being irradiated onto and absorbed by the laser main body, which did not contribute to the excitation of the laser main body but caused a rise in the temperature of the laser main body.
この発明は上記のような問題点を解消するためになされ
たもので、レーザ本体の励起に有用な発光のみを透過し
、紫外光および赤外光のレーザ本体への照射吸収を除去
し、レーザ本体の着色による励起効率の低下、レーザ本
体の温度上昇によるビーム品質の低下のない、高効率発
振、高品質ビームが得られる内部全反射型固体レーザ装
置を得ることを目的とする。This invention was made to solve the above-mentioned problems. It transmits only the light emitted that is useful for excitation of the laser body, eliminates the absorption of ultraviolet light and infrared light into the laser body, and The object of the present invention is to obtain a total internal reflection type solid-state laser device that can generate highly efficient oscillation and a high-quality beam without decreasing excitation efficiency due to coloring of the laser body or decreasing beam quality due to temperature rise in the laser body.
この発明に係る内部全反射型固体レーザ装置は、レーザ
本体の光照射面に紫外光及び赤外光を反射する多層膜を
コーティングしたものである。The total internal reflection type solid-state laser device according to the present invention has the light irradiation surface of the laser body coated with a multilayer film that reflects ultraviolet light and infrared light.
この発明におけるレーザ本体にコーティングされた多層
膜は、紫外光及び赤外光を反射するので、ソーフリゼー
ションを防ぐと共にレーザ本体の温度上昇を防ぎ、高品
質のビームが得られる。The multilayer film coated on the laser body in the present invention reflects ultraviolet light and infrared light, thereby preventing sofization and temperature rise of the laser body, resulting in a high quality beam.
〔９ｊ！施例〕
以下、この発明の一実施例を図について説明する。第１
図はこの発明の一実施例による内部全反射型固体レーザ
装置を示す断面構成図であり、（１）はネオジムをドー
プしたＧ Ｇ Ｇ （Ｇｄ３ Ｇａ５ ＯＩｔ ）結晶
よシなるレーザ本体、（７ａ） （７ｂ）はレーザ本体
（１）の励起光照射面上にコーティングされた多層膜で
あり、例えば第２図のような透過特性を持つものである
。即ち紫外光及び赤外光を反射する。このような膜は例
えば５ｉ０１ 、 ＭｇＦ、 、 ＴｌＩＦ等を用い、
慣用されている方法で多層コーチイン嘆を形成すること
により実現することができる。[9j! Embodiment] An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a cross-sectional configuration diagram showing a total internal reflection type solid-state laser device according to an embodiment of the present invention, in which (1) shows a laser main body made of neodymium-doped G G G (Gd3 Ga5 OIt) crystal, and (7a) (7b) is a multilayer film coated on the excitation light irradiation surface of the laser body (1), and has a transmission characteristic as shown in FIG. 2, for example. That is, it reflects ultraviolet light and infrared light. Such a film uses, for example, 5i01, MgF, TlIF, etc.
This can be achieved by forming a multi-layer coach-in layer in a customary manner.
（ｌａ） （８ｂ）はレーザ本体（１）の両面を各々照
射する励起光源、例えばキセノンフラッシュランプ、（
４ａ） （４ｂ）はフラッシュワンプ（８ａ） （８ｂ
）の７プツシユ光を各々上記レーザ本体（１）に反射さ
せる反射鏡である。(la) (8b) is an excitation light source that illuminates both sides of the laser body (1), such as a xenon flash lamp, (
4a) (4b) is a flash wamp (8a) (8b
) is a reflecting mirror that reflects each of the seven push lights to the laser main body (1).
次に動作について説明する。レーザ本体（１）は、フラ
ッシュランプ（８ａ） （８ｂ）からの７プツシユ光に
より励起され、レーザビーム全反射ｆｉ（５ａ）とレー
ザビーム部分反射鏡（５ｂ）からなるレーザ共振ＫｇＫ
ｊ り ｌ／−ザビームを発振する。このときフラッ
シュ光のスペクトル分布は例えば第４図に示すように紫
外から赤外までの全領域に広がっている。Next, the operation will be explained. The laser main body (1) is excited by seven push lights from flash lamps (8a) (8b), and a laser resonance KgK consisting of a laser beam total reflection fi (5a) and a laser beam partial reflection mirror (5b) is excited.
j ri l/-The beam is oscillated. At this time, the spectral distribution of the flash light extends over the entire range from ultraviolet to infrared, as shown in FIG. 4, for example.
ところが、レーザ本体（１）の励起光照射面上にコーテ
ィングされた多層膜（７ａ） （７ｂ）によシ、レーザ
本体（１）の内部には、第２図に示される波長５００ｎ
ｍ〜９００ ｎｍまでの光しか透過しない、従ってレー
ザ本体（１）には励起に有効な波長域の光しか透過して
こないため、レーザ本体（１）から効率よくレーザ出力
を発振させることができる。また紫外光、赤外光を多層
コーテイング膜（７ａ） （７ｂ）により反射するため
、レーザ本体（１）はソーヲリゼーションの影響を受け
ず、余分な熱入力もないため、効率よく安定に高品質ビ
ームを得ることができる。なお、上記実施例では励起光
源をレーザ本体の両ｌ１ｌＩＩに設けたものを示したが
、レーザ本体の片面にのみ設ける構成のものでもよい。However, due to the multilayer films (7a) (7b) coated on the excitation light irradiation surface of the laser body (1), there is a wavelength of 500 nm inside the laser body (1) as shown in FIG.
Only light in the wavelength range from m to 900 nm is transmitted. Therefore, only light in the wavelength range effective for excitation is transmitted through the laser body (1), so laser output can be efficiently oscillated from the laser body (1). . In addition, since ultraviolet light and infrared light are reflected by the multilayer coating films (7a) (7b), the laser body (1) is not affected by saworization and there is no excess heat input, so it can efficiently and stably achieve high performance. You can get quality beam. In the above embodiment, the excitation light source is provided on both sides of the laser body, but the excitation light source may be provided on only one side of the laser body.
さらに、上記実施例では、コーティングＮ（７ａ）（７
ｂ）の透過特性を、活性イオンであるネオジムを励起す
るのに適した特性としたが、活性イオンが他の踵類であ
れば、その活性イオンを励起するのに適した透過特性を
持つ多層コーテイング膜を装着すれば良い。Furthermore, in the above embodiment, coating N(7a)(7
The permeation characteristics in b) are suitable for exciting neodymium, which is an active ion, but if the active ion is another type of heel, a multilayer with permeation characteristics suitable for exciting the active ion is used. All you need to do is attach a coating film.
また、多層膜の透過特性は第２図に示すようなものでな
くとも、例えばレーザ本体の活性イオンの吸収スペクト
ルのみを透過させるものでもよい。Further, the transmission characteristics of the multilayer film need not be as shown in FIG. 2, and may be such that, for example, only the absorption spectrum of active ions of the laser body is transmitted.
以上のようにこの発明によれば内部全反射型固体レーザ
装置において、レーザ本体の光照射面に紫外光及び赤外
光を反射する多層膜をコーティングしたので、装置が簡
素すると共に、レーザ本体のソーヲリゼーション及び温
度上昇を防ぎ、高効率発振、高品質ビームが得られる効
果がある。As described above, in the total internal reflection type solid-state laser device according to the present invention, the light irradiation surface of the laser body is coated with a multilayer film that reflects ultraviolet light and infrared light. It has the effect of preventing sowization and temperature rise, and providing high-efficiency oscillation and high-quality beams.
第１図はこの発明の一実施例による内部全反射型固体レ
ーザ装置を示す断面構成図、第２図はこの発明の一実施
例による多層コーテイング膜の透過率を示す特性図、第
８図（ａ） （ｂｌは各々従来の内部全反射型固体レー
ザ装置を示す縦断面構成図及び横断面構成図、第４図は
キセノンフラッシュランプの発光スペクトルを示す分布
図、並びに第５図はネオジム活性イオンを励起するのに
有用な光のスペクトルを示す分布図である。
（１）・・・レーザ本体 （８ａ）（８ｂ）・・・
励起光源（４ａ）（４ｂ） −反射％ （５ａ）−
全反射鏡（５ｂ）・・・部分反射鐘（６）・・・レーザ
ビーム（７ａ）（７ｂ）・・・多層膜
なお、図中、同一符号は同−又は相当部分を示す。FIG. 1 is a cross-sectional configuration diagram showing a total internal reflection type solid-state laser device according to an embodiment of the present invention, FIG. 2 is a characteristic diagram showing the transmittance of a multilayer coating film according to an embodiment of the present invention, and FIG. a) (bl is a vertical cross-sectional configuration diagram and a cross-sectional configuration diagram showing a conventional total internal reflection type solid-state laser device, respectively, Figure 4 is a distribution diagram showing the emission spectrum of a xenon flash lamp, and Figure 5 is a distribution diagram showing neodymium active ion It is a distribution diagram showing the spectrum of light useful for exciting. (1)... Laser body (8a) (8b)...
Excitation light source (4a) (4b) -Reflection% (5a)-
Total reflection mirror (5b)...Partial reflection bell (6)...Laser beam (7a) (7b)...Multilayer film Note that in the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (2)
矩形のレーザ本体に光を照射し、上記レーザ本体を励起
し、レーザビームを発振させるものにおいて、上記レー
ザ本体の光照射面に紫外光及び赤外光を反射する多層膜
をコーティングしたことを特徴とする内部全反射型固体
レーザ装置。(1) A laser body having two optically smooth surfaces parallel to each other and having a rectangular cross section is irradiated with light to excite the laser body and oscillate a laser beam, wherein the light irradiation surface of the laser body A total internal reflection type solid-state laser device characterized in that the laser is coated with a multilayer film that reflects ultraviolet light and infrared light.
ルのみを透過させる特許請求の範囲第１項記載の内部全
反射型固体レーザ装置。(2) The total internal reflection type solid-state laser device according to claim 1, wherein the multilayer film transmits only the absorption spectrum of active ions in the laser body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25412286A JPS63107080A (en) | 1986-10-23 | 1986-10-23 | Internal total reflection type solid laser equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25412286A JPS63107080A (en) | 1986-10-23 | 1986-10-23 | Internal total reflection type solid laser equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63107080A true JPS63107080A (en) | 1988-05-12 |
Family
ID=17260530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25412286A Pending JPS63107080A (en) | 1986-10-23 | 1986-10-23 | Internal total reflection type solid laser equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63107080A (en) |
-
1986
- 1986-10-23 JP JP25412286A patent/JPS63107080A/en active Pending
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