JPH02253675A - Lasing device - Google Patents
Lasing deviceInfo
- Publication number
- JPH02253675A JPH02253675A JP7394089A JP7394089A JPH02253675A JP H02253675 A JPH02253675 A JP H02253675A JP 7394089 A JP7394089 A JP 7394089A JP 7394089 A JP7394089 A JP 7394089A JP H02253675 A JPH02253675 A JP H02253675A
- Authority
- JP
- Japan
- Prior art keywords
- laser
- light
- optical waveguide
- ring resonator
- light source
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 230000010355 oscillation Effects 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract 5
- 150000002500 ions Chemical class 0.000 claims description 12
- 230000001902 propagating effect Effects 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 abstract description 27
- 230000005284 excitation Effects 0.000 abstract description 12
- 230000003595 spectral effect Effects 0.000 abstract description 5
- 230000002194 synthesizing effect Effects 0.000 abstract 3
- 230000004913 activation Effects 0.000 abstract 2
- 239000012788 optical film Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910052768 actinide Inorganic materials 0.000 description 1
- 150000001255 actinides Chemical class 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000007740 vapor deposition 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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/083—Ring lasers
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はレーザ装置に関し、特に単一縦干一部で発振す
る光導波路型レーザ発振装面に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a laser device, and more particularly to an optical waveguide type laser oscillation device that oscillates in a single vertical section.
Ｃ従来の技術）
レーザ活性イオン、例えば遷移金属、アクチニド、希土
類元素等をドープした先導波路をレーザ媒質に用いた先
導波路型レーザは、小型・＠食性に優れている。これは
通常２つの反射鏡の中で光を往復させるファブリベロー
共振器を用いており、−数的には多数の縦モードが同時
発振している。この原因の一つは、ファブリベロー共振
器内に形成される定在波により、レーザ媒質に空間的な
ホールバーニングが生じるためである。また、通常の先
導波路では２つの直交偏波に対応した縦モードが競合し
、スペクトルや強度が不安定になる。したがりて、上述
したようにレーザイオンをドープした通常の先導波路を
用いてファブリベロー共振器を構成した従来の先導波路
型レーザでは、木質的に安定な縦単一モード発振を実現
することが極めて困にｔである。C. Prior Art) Guided waveguide type lasers using a guide waveguide doped with laser active ions, such as transition metals, actinides, rare earth elements, etc., as a laser medium are excellent in size and eclipseability. This typically uses a Fabry-Bello resonator that reciprocates light between two reflecting mirrors, with a numerically large number of longitudinal modes oscillating simultaneously. One of the reasons for this is that spatial hole burning occurs in the laser medium due to standing waves formed within the Fabry-Bello resonator. Furthermore, in a normal leading waveguide, longitudinal modes corresponding to two orthogonal polarizations compete with each other, making the spectrum and intensity unstable. Therefore, as mentioned above, in the conventional guided waveguide laser in which a Fabry-Bello resonator is constructed using a normal guided waveguide doped with laser ions, it is difficult to achieve longitudinal single mode oscillation that is stable in terms of wood quality. It is extremely difficult.
（発明が解決しようとする課題）
そこで特に単一縦モード化、スペクトル線幅の狭窄化を
実現するため、上記のファブリペロ共振器中もしくは共
振器用ミラーとして波長選択性のある素子（例えば先フ
ァイバのクラッド部分を削り、その上に長手方向にそり
てグレーティングを形成した光フアイバグレーティング
素子）を用いる方法が考案されている（１．Ｍ、Ｊａｕ
ｎｃｅｙ ａｔ ａｌ、。(Problems to be Solved by the Invention) Therefore, in order to achieve a single longitudinal mode and narrowing of the spectral linewidth, it is necessary to use a wavelength-selective element (for example, at the end of the fiber) in the Fabry-Perot cavity or as a mirror for the cavity. A method using an optical fiber grating element (optical fiber grating element in which the cladding part is shaved and a grating is formed by warping in the longitudinal direction) has been devised (1.M, Jau
ncey at al.
−５ｉｎｇｌｅ−１ｏｎｇｉｔｕｄｉｎａｌ−ｍｏｄｅ
ｏｐｅｒａｔｉｏｎ ｏｆ ａｎＮｄ−ｄｏｐｅｄ
ｆｉｂｅｒ １ａｓｅｒ″、Ｅｌａｃｔｒｏｎ、Ｌｅｔ
ｔ、、２４．ｐｐ。-5ingle-1ongitudinal-mode
operation of anNd-doped
fiber 1aser'', Electron, Let
t,,24. pp.
２４−２６ （１９８Ｂ） ）。24-26 (198B)).
しかしながら、この方法は特殊な加工を施した光学素子
を用いるため、共振器構造が複雑で高価となるだけでな
く安定性、信頼性等にも問題があった。However, since this method uses a specially processed optical element, the resonator structure is complicated and expensive, and there are also problems with stability, reliability, etc.
本発明は、ＭＸ単一モードで発振する先導波路型レーザ
の構成に関するもので、安定でスペクトル線幅のせまい
レーザ発振を実現するものである。The present invention relates to the configuration of a guided waveguide laser that oscillates in an MX single mode, and achieves stable laser oscillation with a narrow spectral linewidth.
本発明は、レーザ活性イオンがドープされた光２、ｒＩ
−波路がレーザ媒質として用いられるレーザ発振装置に
おいて、レーザ活性イオンが少なくとも一部分にトープ
されたシングルモード光導波路、および偏光手段を含む
リング共振器と、リング共振器を励振するためのボンピ
ング光源とを具えたことを特徴とする。The present invention provides laser active ion doped light 2, rI
- A laser oscillation device in which a waveguide is used as a laser medium, which includes a single-mode optical waveguide in which laser-active ions are toped at least in part, a ring resonator including polarization means, and a bombing light source for exciting the ring resonator. It is characterized by the following.
さらに本発明はレーザ活性イオンがドープされた先導波
路がレーザ媒質として用いられるレーザ発振装置におい
て、少なくとも一部分にレーザ活性イオンがドープされ
た単一偏波のみが伝搬可能な先導波路を含むリング共振
器と、リング共振器を励振するためのボンピング光源と
を具えたことを４．７徴とする。Furthermore, the present invention provides a laser oscillation device in which a guiding waveguide doped with laser active ions is used as a laser medium, in which a ring resonator including a guiding waveguide in which only a single polarized wave, at least a portion of which is doped with laser active ions, can propagate. and a bombing light source for exciting the ring resonator.
上述したように、従来の光導波路型レーザでは、縦単一
モード発振を得るためにファブリベロー共振器の中、も
しくは鏡として、光フアイバグレーティング等を使用し
ていたため、その構造が複雑であった。（しかも、上記
タイプの共１ｉ器は、共振器内に空間的なホールバーニ
ングが生じるため、縦多モード発振することとなる。）
また、通常のシングルモード光導波路を用いているため
、直交する２つの偏波が同時レーザ発振し、縦単一モー
ド発振を得ることは国籍である。As mentioned above, conventional optical waveguide lasers have complicated structures because they use optical fiber gratings in the Fabry-Bello resonator or as mirrors to obtain longitudinal single mode oscillation. . (Moreover, in the above type of resonator, spatial hole burning occurs within the resonator, resulting in vertical multimode oscillation.)
Furthermore, since a normal single-mode optical waveguide is used, two orthogonal polarized waves simultaneously perform laser oscillation, and it is possible to obtain longitudinal single-mode oscillation.
これに対し、本発明では、光グレーテイング等のミラー
を用いず、先導波路だけで共振器を構成することが可能
であると同時に、空間的なホールバーニングが原理的に
起こらないリング共振器構造を、（１）通常のシングル
モード光導波路にレーザ活性イオンをドープした先導波
路と偏光素子機能を有するデバイスにより構成する、あ
るいは（２）単一偏波のみが伝搬可能な先導波路の少な
くとも一部にレーザ活性イオンをドープした先導波路で
構成することにより、従来の先導波路型レーザのもつ上
記欠点を解決することが可能となる。In contrast, in the present invention, it is possible to configure a resonator only with a guiding waveguide without using a mirror such as an optical grating, and at the same time, a ring resonator structure is created in which spatial hole burning does not occur in principle. (1) consisting of a guiding waveguide in which a normal single-mode optical waveguide is doped with laser active ions and a device having a polarizing element function, or (2) at least a portion of the guiding waveguide capable of propagating only a single polarized wave. By constructing the laser with a leading waveguide doped with laser active ions, it becomes possible to solve the above-mentioned drawbacks of the conventional leading waveguide type laser.
（実施例〕 以下に図面を参照して本発明の詳細な説明する。(Example〕 The present invention will be described in detail below with reference to the drawings.
第１図は、本発明の一実施例を説明する図であって、１
は波長５７０，８０７，９８０あるいは１４８０ｎｍの
励起光源、２は励起光とレーザ発振光とを合分波する波
長選択性を有する光合分波器、３は少なくとも一部にＥ
ｒ３＋をドープしたシングルモード光ファイバであり、
０点で光合分波器２と、ａ点で偏波保持光フアイバ型偏
光子４と、それぞれ融着接続されている。４は偏波保持
光フアイバ型偏光子であり、ｂ点で光合分波器２と、ａ
点で光ファイバ３と、それぞれ融着接続されている。励
起光源１を出た光は、光合分波器２を通して光ファイバ
３に結合され、光ファイバ３に含まれるＥｒ３＋を励起
し、１．５ μｍ帯の光を生み出す。この光は、光合分
岐器２、光ファイバ３および４で構成されたリング共振
器を所定の回数伝搬し、しきい値に達した時点でレーザ
発振し、光合分波器２より外部にとりだされる。その際
、光ファイバ４は（扁光子として作用するため、光ファ
イバ３で生みだされた１、５μｍ帯の光の直交２偏波間
のうちどちらか一方の偏波のみを選択し、発振させるこ
とになり、単一偏波のレーザ光が得られる。FIG. 1 is a diagram illustrating an embodiment of the present invention.
is an excitation light source with a wavelength of 570, 807, 980 or 1480 nm, 2 is an optical multiplexer/demultiplexer with wavelength selectivity for multiplexing and demultiplexing excitation light and laser oscillation light, and 3 is at least partially E.
It is a single mode optical fiber doped with r3+,
The optical multiplexer/demultiplexer 2 is fusion-spliced at point 0, and the polarization-maintaining optical fiber polarizer 4 is fusion-spliced at point a. 4 is a polarization-maintaining optical fiber type polarizer, which connects the optical multiplexer/demultiplexer 2 at point b and a
They are fusion spliced to the optical fiber 3 at each point. The light emitted from the excitation light source 1 is coupled to the optical fiber 3 through the optical multiplexer/demultiplexer 2, excites Er3+ contained in the optical fiber 3, and produces light in the 1.5 μm band. This light propagates through a ring resonator composed of an optical multiplexer/brancher 2 and optical fibers 3 and 4 a predetermined number of times, oscillates as a laser when it reaches a threshold value, and is taken out from the optical multiplexer/demultiplexer 2. Ru. At that time, the optical fiber 4 acts as a polarizer, so it selects only one of the two orthogonal polarized waves of light in the 1 and 5 μm band generated by the optical fiber 3 and oscillates it. As a result, a single polarized laser beam can be obtained.
第２図は、本発明の他の実施例を説明する図であって、
５は波長５３０，１３０７．９８０あるいは１４８０ｎ
ｍの励起光源、６は励起光とレーザ光とを合分波する波
長選択性を有する光合分波器、７は少なくとも一部にＥ
Ｓ”をドープした偏波保持光ファイバ型線光子であり、
ｄ点及びｅ点で光合分波器６と融着接続されている。励
起光源５を出た光は光合分波器６を通して光ファイバ７
に結合され、Ｅｒ３“を励起し１．５μｍ帯の光を生み
出す。この光は、光合分波器６と光ファイバ７で構成さ
れたリング共振器を伝搬することでレーザ発振する。そ
の際、光ファイバ７は偏光子としても作用するため、上
記実施例で説明したように、単一偏波のレーザ光が得ら
れる。FIG. 2 is a diagram illustrating another embodiment of the present invention,
5 is wavelength 530, 1307.980 or 1480n
m excitation light source; 6 an optical multiplexer/demultiplexer having wavelength selectivity for multiplexing and demultiplexing excitation light and laser light; and 7, at least a portion of E
It is a polarization-maintaining optical fiber type line photon doped with S'',
It is fusion-connected to the optical multiplexer/demultiplexer 6 at points d and e. The light emitted from the excitation light source 5 passes through an optical multiplexer/demultiplexer 6 to an optical fiber 7.
, and excites Er3" to produce light in the 1.5 μm band. This light oscillates as a laser by propagating through a ring resonator composed of an optical multiplexer/demultiplexer 6 and an optical fiber 7. Since the optical fiber 7 also acts as a polarizer, a single polarized laser beam can be obtained as explained in the above embodiment.
第３図は、本発明のさらに他の実施例を説明する図であ
る。８は波長５３０，８０７，９８０あルイは１４８゜
ｉｔ Ｉｎの励起光源、９およびｌＯは単一モード光フ
ァイバである。１１および１２はそれぞれ直線状および
リング状の先導波路であり、シリコン基板１３上の石英
ガラス層１４内に形成されている。 １５は石英層１４
土に設けられた金属蒸着膜である。先導波路１２は少な
くともその一部分にＥｒ３＋を含み、かつ直線状導波路
１１と先約に結合され、レーザ発振波長に関してリング
共振器を木が成する。単一モード光ファイバ９および１
０は直線状先導波路１１と結合されている。FIG. 3 is a diagram illustrating still another embodiment of the present invention. 8 is an excitation light source with wavelengths of 530, 807, and 980 degrees, and 148 degrees in, and 9 and 10 are single mode optical fibers. 11 and 12 are linear and ring-shaped leading waveguides, respectively, and are formed in a quartz glass layer 14 on a silicon substrate 13. 15 is the quartz layer 14
It is a metal vapor-deposited film placed on soil. The guide waveguide 12 contains Er3+ in at least a portion thereof, and is coupled with the linear waveguide 11 a priori to form a ring resonator with respect to the laser oscillation wavelength. Single mode optical fibers 9 and 1
0 is coupled to the linear leading waveguide 11.
励起光源８を出た光は、光ファイバ９を通してリング共
振器に導かれ、共振器中のＥｒ３”を励起し、１，５
μｍりＩＦの光を生み出す。この光はリング共振器中を
何回も伝搬することでレーザ発振する。The light emitted from the excitation light source 8 is guided to the ring resonator through the optical fiber 9, excites Er3'' in the resonator, and excites 1,5
Produces μm IF light. This light oscillates as a laser by propagating through the ring resonator many times.
その際、金属蒸若膜１５は、リング共振器中を伝搬可能
なＴＥ、ＴＭ波のうち、ＴＭ波を阻止するため、単一偏
波のみがレーザ発振することとなる。したかって、光フ
ァイバＩＯからは、ＴＥ波のみがレーザ光として取り出
される。At this time, the metal vaporized film 15 blocks the TM waves among the TE and TM waves that can propagate in the ring resonator, so that only a single polarized wave is lased. Therefore, only the TE wave is extracted as laser light from the optical fiber IO.
以上説明したように、本発明によれば縦−／Ｉｔモード
で狭スペクトル線幅を有する光導波路型レーザ装置が先
導波路のみで容易に構成できる。As described above, according to the present invention, an optical waveguide type laser device having a narrow spectral linewidth in longitudinal -/It mode can be easily constructed using only a leading waveguide.
木レーザは、極めてコヒーレンスが高いため、コヒーレ
ント光通信や、光フアイバセンシング用光源として幅広
い応用が期待できる。Because wood lasers have extremely high coherence, they are expected to have a wide range of applications as light sources for coherent optical communications and optical fiber sensing.
第１図ないし第３図はそれぞれ本発明の実ｈλ例の扱式
図である。
励起光源、
光合分波器、
Ｅｒ”ドープシングルモード光ファイバ、偏波保持光フ
アイバ型偏光子、
励起光源、
光合分波器、
Ｅｒ”ドープ偏波保持光フアイバ型偏
光子、
励起光源、
・・・ 単一モード光ファイバ、
直線状先導波路、
リング状先導波路、
シリコン基板、
石英ガラス層、
金属蒸着膜。
本蒋８月の第１の良カ七ｆ列の魔へ回
第１図1 to 3 are handling formula diagrams of actual hλ examples of the present invention, respectively. Excitation light source, optical multiplexer/demultiplexer, Er"-doped single-mode optical fiber, polarization-maintaining optical fiber polarizer, excitation light source, optical multiplexer/demultiplexer, Er"-doped polarization-maintaining optical fiber polarizer, excitation light source, ・・・Single-mode optical fiber, linear waveguide, ring-shaped waveguide, silicon substrate, silica glass layer, metal vapor deposition film. Ben Jiang August's 1st Liangka 7th column to the devil Figure 1
Claims (1)
ザ媒質として用いられるレーザ発振装置において、 レーザ活性イオンが少なくとも一部分にドープされた
シングルモード光導波路、および偏光手段を含むリング
共振器と、 該リング共振器を励振するためのポンピング光源とを
具えたことを特徴とするレーザ発振装置。 ２） レーザ活性イオンがドープされた光導波路がレー
ザ媒質として用いられるレーザ発振装置において、 少なくとも一部分にレーザ活性イオンがドープされた
単一偏波のみが伝搬可能な光導波路を含むリング共振器
と、 該リング共振器を励振するためのポンピング光源とを
具えたことを特徴とするレーザ発振装置。[Scope of Claims] 1) A laser oscillation device in which an optical waveguide doped with laser active ions is used as a laser medium, which includes: a single mode optical waveguide doped at least in part with laser active ions; and a ring resonator including a polarizing means. 1. A laser oscillation device comprising: a ring resonator; and a pumping light source for exciting the ring resonator. 2) In a laser oscillation device in which an optical waveguide doped with laser active ions is used as a laser medium, a ring resonator including an optical waveguide at least partially doped with laser active ions and capable of propagating only a single polarized wave; A laser oscillation device comprising a pumping light source for exciting the ring resonator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1073940A JP2717218B2 (en) | 1989-03-28 | 1989-03-28 | Laser oscillation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1073940A JP2717218B2 (en) | 1989-03-28 | 1989-03-28 | Laser oscillation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02253675A true JPH02253675A (en) | 1990-10-12 |
| JP2717218B2 JP2717218B2 (en) | 1998-02-18 |
Family
ID=13532614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1073940A Expired - Fee Related JP2717218B2 (en) | 1989-03-28 | 1989-03-28 | Laser oscillation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2717218B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0722674A (en) * | 1993-06-18 | 1995-01-24 | Japan Aviation Electron Ind Ltd | Optical ring resonator and passive ring resonance light gyro wherein the optical ring resonator is used |
| US6798794B2 (en) | 2001-11-26 | 2004-09-28 | Sony Corporation | Semiconductor laser device, astigmatic correction plate used therefor and method of arranging the astigmatic correction plate |
| US20180083410A1 (en) * | 2016-09-22 | 2018-03-22 | LGS Innovations LLC | High-q amplified resonator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6338903A (en) * | 1986-08-04 | 1988-02-19 | Sumitomo Electric Ind Ltd | Fiber laser |
| JPS63291488A (en) * | 1987-05-25 | 1988-11-29 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber laser device |
-
1989
- 1989-03-28 JP JP1073940A patent/JP2717218B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6338903A (en) * | 1986-08-04 | 1988-02-19 | Sumitomo Electric Ind Ltd | Fiber laser |
| JPS63291488A (en) * | 1987-05-25 | 1988-11-29 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber laser device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0722674A (en) * | 1993-06-18 | 1995-01-24 | Japan Aviation Electron Ind Ltd | Optical ring resonator and passive ring resonance light gyro wherein the optical ring resonator is used |
| US6798794B2 (en) | 2001-11-26 | 2004-09-28 | Sony Corporation | Semiconductor laser device, astigmatic correction plate used therefor and method of arranging the astigmatic correction plate |
| US20180083410A1 (en) * | 2016-09-22 | 2018-03-22 | LGS Innovations LLC | High-q amplified resonator |
| US9948056B2 (en) * | 2016-09-22 | 2018-04-17 | LGS Innovations LLC | High-Q amplified resonator |
| US10714886B2 (en) | 2016-09-22 | 2020-07-14 | LGS Innovations LLC | High-Q amplified resonator |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2717218B2 (en) | 1998-02-18 |
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