JPH05100266A - Optical higher harmonics generating element - Google Patents
Optical higher harmonics generating elementInfo
- Publication number
- JPH05100266A JPH05100266A JP18320691A JP18320691A JPH05100266A JP H05100266 A JPH05100266 A JP H05100266A JP 18320691 A JP18320691 A JP 18320691A JP 18320691 A JP18320691 A JP 18320691A JP H05100266 A JPH05100266 A JP H05100266A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- substrate
- refractive index
- inversion
- electric field
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 87
- 230000010287 polarization Effects 0.000 claims abstract description 43
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 230000005684 electric field Effects 0.000 claims abstract description 22
- 230000000737 periodic effect Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は短波長光の発生に利用す
る。特に、ドメイン反転位相整合方式による光高調波の
発生に関する。BACKGROUND OF THE INVENTION The present invention is used to generate short wavelength light. In particular, it relates to generation of optical harmonics by the domain inversion phase matching method.
【０００２】[0002]
【従来の技術】短波長光を発生する素子として、非線形
光学物質を用い、入射レーザ光に対してその高調波、特
に第二高調波を出力する高調波発生素子が従来から知ら
れている。特に変換効率の高いものとしては、光導波路
に沿って分極方向を周期的に反転させたドメイン反転位
相整合方式の素子がある。2. Description of the Related Art As a device for generating short wavelength light, a harmonic generating device which uses a non-linear optical material and outputs its harmonic wave, particularly the second harmonic wave, with respect to incident laser light has been conventionally known. A device having a particularly high conversion efficiency is a domain inversion phase matching type device in which the polarization direction is periodically inverted along the optical waveguide.
【０００３】ドメイン反転位相整合方式は、分極を周期
的に反転させることにより入射光の位相とその高調波光
の位相とを整合させ、変換効率を高めるものである。分
極の反転周期すなわちドメイン反転周期Ｌc は、コヒー
レンス長により与えられ、 Ｌc ＝λF ／２（ＮF −ＮSH） で表される。λF は基本波（入射光）の波長、ＮF は基
本波に対する等価屈折率、ＮSHは高調波に対する等価屈
折率である。The domain reversal phase matching method is to increase the conversion efficiency by periodically reversing the polarization to match the phase of incident light with the phase of its harmonic light. The polarization inversion period, that is, the domain inversion period L c is given by the coherence length and is represented by L c = λ F / 2 (N F −N SH ). λ F is the wavelength of the fundamental wave (incident light), N F is the equivalent refractive index for the fundamental wave, and N SH is the equivalent refractive index for harmonics.
【０００４】光導波路の等価屈折率は、その材料の不純
物濃度や導波路の厚さによっても変化する。しかし、上
式から明らかなように、光導波路の等価屈折率が正しく
制御されていないと、光導波路上の分極を正確な周期で
反転させても位相整合が得られないことになる。これを
実用的に解決する構造として、平成２年春季第３７回応
用物理学関係連合講演会予稿集第８９３頁、論文番号２
８Ｐ−Ｆ−８、分極反転グレーティング位相整合ＬＮ導
波路ＳＨＧデバイスには、同一基板上に複数の光導波路
を平行に設け、それに対して扇状に分極反転を形成した
素子が示されている。The equivalent refractive index of the optical waveguide changes depending on the impurity concentration of the material and the thickness of the waveguide. However, as is clear from the above equation, if the equivalent refractive index of the optical waveguide is not properly controlled, phase matching cannot be obtained even if the polarization on the optical waveguide is inverted at an accurate period. As a structure for practically solving this, the spring of 1990, the 37th Joint Lecture on Applied Physics, Proceedings, page 893, article number 2
In 8P-F-8 and polarization inversion grating phase matching LN waveguide SHG device, an element in which a plurality of optical waveguides are provided in parallel on the same substrate and polarization inversion is formed in a fan shape is shown.
【０００５】図３は上述の文献に示された光高調波発生
素子を示す斜視図である。この素子はＬｉＮｂＯ3 基板
３１上に形成された複数の光導波路３２を備え、さら
に、これらの光導波路３２に対して扇状の分極反転部を
周期的に形成したドメイン反転領域３３を備える。分極
の反転が扇状に分布しているため、複数の光導波路３２
のそれぞれに対してドメイン反転周期が少しずつ異な
る。使用時には、複数の光導波路３２の中から最適のも
のを選べばよい。FIG. 3 is a perspective view showing the optical harmonic generating element shown in the above-mentioned document. This device includes a plurality of optical waveguides 32 formed on a LiNbO 3 substrate 31, and further includes a domain inversion region 33 in which fan-shaped polarization inversion parts are periodically formed in the optical waveguides 32. Since the inversion of polarization is distributed in a fan shape, a plurality of optical waveguides 32
The domain inversion period is slightly different for each of. At the time of use, the optimum one may be selected from the plurality of optical waveguides 32.
【０００６】[0006]
【発明が解決しようとする課題】しかし、この構造で
は、光導波路の実際の等価屈折率にほぼ対応するドメイ
ン反転周期を選ぶことはできるが、各々の光導波路に対
するドメイン反転周期の変化が段階的であるため、必ず
しも光導波路の等価屈折率に対応したドメイン反転周期
を得ることは困難である。With this structure, however, it is possible to select a domain inversion period that approximately corresponds to the actual equivalent refractive index of the optical waveguide, but the domain inversion period for each optical waveguide changes gradually. Therefore, it is not always easy to obtain the domain inversion period corresponding to the equivalent refractive index of the optical waveguide.
【０００７】本発明は、このような課題を解決し、光導
波路の等価屈折率に対応するドメイン反転周期を得るこ
とのできる光高調波発生素子を提供することを目的とす
る。An object of the present invention is to solve the above problems and to provide an optical harmonic generating element capable of obtaining a domain inversion period corresponding to the equivalent refractive index of an optical waveguide.
【０００８】[0008]
【課題を解決するための手段】本発明の第一の観点によ
ると、非線形光学物質の基板と、この基板に形成された
光導波路とを備え、基板には光導波路を横切って周期的
分極反転が形成された光高調波発生素子において、光導
波路に電界を印加して基本波に対する等価屈折率と高調
波に対する等価屈折率との差を調整する電界印加手段を
備えたことを特徴とする光高調波発生素子が提供され
る。According to a first aspect of the present invention, a substrate of a non-linear optical material and an optical waveguide formed on the substrate are provided, and the substrate has a periodic polarization reversal across the optical waveguide. In the optical harmonic generation element having the structure described above, an electric field applying means is provided for adjusting the difference between the equivalent refractive index for the fundamental wave and the equivalent refractive index for the harmonic by applying an electric field to the optical waveguide. A harmonic generation element is provided.
【０００９】電界印加手段は、分極が反転する毎に極性
が反転する電界を光導波路に印加する構成が望ましい
が、他の構成でもよい。例えば、周期的分極反転を光導
波路の長さ方向の一部に離散的に形成し、周期的分極反
転が設けられた部分と設けられていない部分とを含んで
電界を印加することもできる。It is desirable that the electric field applying means applies an electric field whose polarity is inverted every time the polarization is inverted to the optical waveguide, but other configurations may be adopted. For example, the periodic polarization inversion may be discretely formed in a part of the length direction of the optical waveguide, and the electric field may be applied including the portion provided with the periodic polarization inversion and the portion not provided with the periodic polarization inversion.
【００１０】この素子を従来例に示した構造と組み合わ
せると、従来例に示した構造を粗調に用い、さらに、基
本波に対する等価屈折率ＮF および高調波に対する等価
屈折率ＮSHを微調することができる。When this element is combined with the structure shown in the conventional example, the structure shown in the conventional example is used roughly, and the equivalent refractive index N F for the fundamental wave and the equivalent refractive index N SH for the harmonics are finely adjusted. be able to.
【００１１】具体的には、非線形光学物質の基板と、こ
の基板に形成された複数の光導波路とを備え、基板に
は、複数の光導波路のそれぞれに対して異なる周期とな
る形状、例えば扇状の周期的分極反転がそれぞれの光導
波路を横切って形成された光高調波発生素子において、
分極が反転する毎に極性が反転する電界を光導波路に印
加する手段を備えたことを特徴とする光高調波発生素子
が提供される。Specifically, it comprises a substrate of a non-linear optical material and a plurality of optical waveguides formed on the substrate, and the substrate has a shape having a different period for each of the plurality of optical waveguides, for example, a fan shape. In the optical harmonic generating device in which the periodic polarization inversion of is formed across each optical waveguide,
There is provided an optical harmonic generation device comprising a means for applying an electric field whose polarity is inverted every time the polarization is inverted, to an optical waveguide.
【００１２】また、周期的分極反転が複数の光導波路の
長さ方向の一部に離散的に形成され、複数の光導波路の
それぞれに沿って、周期的分極反転が設けられた部分と
設けられていない部分とを含んで電界を印加する手段を
備えたことを特徴とする光高調波発生素子が提供され
る。Further, the periodic polarization inversions are discretely formed in a part of the plurality of optical waveguides in the lengthwise direction, and a portion provided with the periodic polarization inversions is provided along each of the plurality of optical waveguides. An optical harmonic generating element is provided, which includes means for applying an electric field including a portion not included.
【００１３】[0013]
【作用】非線形光学物質に電界を印加すれば屈折率が変
化することは公知である。しかし、分極が周期的に反転
する領域に電界を印加しても、分極の方向毎に電界の効
果が異なるために屈折率の変化が相殺されてしまう。そ
こで、例えば二つの櫛形電極を用いて、分極の方向毎に
極性の異なる電界を印加すれば、等価屈折率を変化させ
ることができる。また、光導波路の一部に離散的に周期
的分極反転を設け、光導波路全体に電界を印加すれば、
周期的分極反転が設けられた領域では屈折率の変化が相
殺されるが、その間の分極反転の設けられていない領域
では屈折率変化が残り、等価屈折率を変化させることが
できる。It is known that the refractive index changes when an electric field is applied to a nonlinear optical material. However, even if an electric field is applied to a region where the polarization is periodically inverted, the change in the refractive index is canceled out because the effect of the electric field differs depending on the polarization direction. Therefore, the equivalent refractive index can be changed by using, for example, two comb-shaped electrodes and applying electric fields having different polarities in each polarization direction. In addition, if periodic polarization inversion is provided in a part of the optical waveguide and an electric field is applied to the entire optical waveguide,
The change in the refractive index is canceled in the region where the periodic polarization inversion is provided, but the change in the refractive index remains in the region where the polarization inversion is not provided therebetween, and the equivalent refractive index can be changed.
【００１４】[0014]
【実施例】図１は本発明第一実施例の光高調波発生素子
の構造を示す斜視図である。1 is a perspective view showing the structure of an optical harmonic generating device according to a first embodiment of the present invention.
【００１５】この素子は、非線形光学物質の基板１１
と、この基板１１に形成された複数の光導波路１２とを
備え、基板１１には、複数の光導波路１２のそれぞれに
対して異なる周期となる形状の周期的分極反転がそれぞ
れの光導波路を横切って形成されたドメイン反転領域１
３が設けられる。ただし、簡単のため分極が反転した部
分については図示していない。This device comprises a substrate 11 of a non-linear optical material.
And a plurality of optical waveguides 12 formed on the substrate 11, and the substrate 11 is provided with periodic polarization inversions of different shapes for the plurality of optical waveguides 12 across the respective optical waveguides. Domain inversion region 1 formed by
3 is provided. However, the portion where the polarization is inverted is not shown for simplicity.
【００１６】ここで本実施例の特徴とするところは、分
極が反転する毎に極性が反転する電界を複数の光導波路
１２に印加する手段として、互いに噛み合う形状の二つ
の櫛形電極１４、１５を備えたことにある。The feature of this embodiment is that two comb-shaped electrodes 14 and 15 having mutually meshing shapes are used as means for applying an electric field whose polarity is inverted each time the polarization is inverted to the plurality of optical waveguides 12. I was prepared.
【００１７】非線形光学物質としてＬｉＮｂＯ3 が用い
られ、光導波路１２がプロトン交換により形成されてい
るとする。その場合には、基本波の波長λF に対するド
メイン反転周期Ｌc は、 λF ＝1.547 μｍのときＬc ＝7.242 μｍ λF ＝0.84 μｍのときＬc ＝1.732 μｍ となる。It is assumed that LiNbO 3 is used as the nonlinear optical material and the optical waveguide 12 is formed by proton exchange. In that case, the domain inversion period L c with respect to the wavelength lambda F of the fundamental wave is a case of λ F = 1.547 μm L c = 7.242 μm λ F = 0.84 L c = 1.732 μm when the [mu] m.
【００１８】櫛形電極１４、１５間に電圧を供給する
と、互いに反転している分極間に電界が印加され、電気
光学効果により屈折率が変化し、基本波に対する屈折率
と高調波に対する屈折率との差 Δｎ＝｜ＮF −ＮSH｜ も変化する。この変化により導波路の等価屈折率を微調
節でき、ドメイン反転周期Ｌc に対応する値にできる。
したがって、分極の反転による位相整合を実現でき、基
本波から高調波への変換効率を最大に高めることができ
る。When a voltage is applied between the comb-shaped electrodes 14 and 15, an electric field is applied between the polarizations that are inverted to each other, and the refractive index changes due to the electro-optical effect, so that the refractive index for the fundamental wave and the refractive index for the harmonic wave are changed. of the difference Δn = | N F -N SH | also varies. By this change, the equivalent refractive index of the waveguide can be finely adjusted to a value corresponding to the domain inversion period L c .
Therefore, phase matching by reversing the polarization can be realized, and the conversion efficiency from the fundamental wave to the harmonic wave can be maximized.
【００１９】電界によるΔｎの補正量Δｎ′は、 Δｎ′＝(1/2)ｒ33・(Ｖ／ｄ）｜ΓSH(ＮSH)3 −ΓF(ＮF)3 ｜ で表される。具体的な値として、 電気光学係数ｒ33＝30.8×10-12 〔ｍ／Ｖ〕 基本波の波長λF ＝1.55 〔μｍ〕 基本波に対する等価屈折率ＮF ＝2.1366 高調波の波長λSH＝0.775 〔μｍ〕 高調波に対する等価屈折率ＮSH＝2.1774 電界補正係数ΓSH＝ΓF ＝0.5 電極間ギャップｄ＝１〔μｍ〕 とすると、 Δｎ′＝4.4 ×10-6×Ｖ となる。したがって、100 Ｖの電圧で、 Δｎ′＝4.4 ×10-4 だけ屈折率差を補正できる。プロトン交換ＬｉＮｂＯ3
導波路では、その厚さが0.1 μｍ変化したときに屈折率
差Δｎが0.0044程度変化する。したがって、そのような
製造誤差を100 Ｖの電圧で補正できる。The correction amount [Delta] n due to the electric field [Delta] n 'is, Δn' = (1/2) r 33 · (V / d) | is expressed by | Γ SH (N SH) 3 -Γ F (N F) 3 .. Specific values, electro-optic coefficient r 33 = 30.8 × 10 -12 [m / V] wavelength of the fundamental wave lambda F = 1.55 [μm] equivalent refractive index for the fundamental wave N F = 2.1366 harmonic wavelength lambda SH = 0.775 [μm] Equivalent refractive index for higher harmonics N SH = 2.1774 If the electric field correction coefficient Γ SH = Γ F = 0.5 and the interelectrode gap d = 1 [μm], then Δn ′ = 4.4 × 10 −6 × V. Therefore, with a voltage of 100 V, the refractive index difference can be corrected by Δn ′ = 4.4 × 10 −4 . Proton exchange LiNbO 3
In the waveguide, when the thickness changes by 0.1 μm, the refractive index difference Δn changes by about 0.0044. Therefore, such a manufacturing error can be corrected with a voltage of 100V.
【００２０】図２は本発明第二実施例の光高調波発生素
子の構造を示す斜視図である。FIG. 2 is a perspective view showing the structure of the optical harmonic generating element of the second embodiment of the present invention.
【００２１】この素子は、非線形光学物質の基板２１
と、この基板２１に形成された複数の光導波路２２とを
備え、基板２１には、複数の光導波路２２のそれぞれに
対して異なる周期となる形状の周期的分極反転がそれぞ
れの光導波路を横切って形成されたドメイン反転領域２
３が設けられる。This device comprises a substrate 21 of nonlinear optical material.
And a plurality of optical waveguides 22 formed on the substrate 21, and the substrate 21 has a periodic polarization inversion having a different period for each of the plurality of optical waveguides 22 across each optical waveguide. Domain inversion region 2 formed by
3 is provided.
【００２２】ここで本実施例の特徴とするところは、ド
メイン反転領域２３が複数の光導波路２２の長さ方向の
一部に離散的に形成され、この複数の光導波路２２のそ
れぞれに沿って、周期的分極反転が設けられた部分と設
けられていない部分とを含んで電界を印加する手段とし
て二つの櫛形電極２４、２５を備えたことにある。櫛形
電極２４は、その歯が複数の光導波路２２に沿って配置
される。櫛形電極２５は、その歯が櫛形電極２４の歯の
間に挟まれるように配置される。The feature of this embodiment is that the domain inversion regions 23 are discretely formed in a part of the plurality of optical waveguides 22 in the longitudinal direction, and the domain inversion regions 23 are formed along the respective optical waveguides 22. The two comb-shaped electrodes 24 and 25 are provided as means for applying an electric field including a portion provided with periodic polarization inversion and a portion not provided with periodic polarization inversion. The teeth of the comb-shaped electrode 24 are arranged along the plurality of optical waveguides 22. The comb-shaped electrode 25 is arranged so that its teeth are sandwiched between the teeth of the comb-shaped electrode 24.
【００２３】上述した第一実施例では、基本波の波長λ
F が短いほどドメイン反転周期Ｌc が短くなり、それに
伴って電極の周期も小さくしなければならない。例えば
基本波として波長0.84 μｍの光を用いるとすると、上
述したようにドメイン反転周期Ｌc は1.732 μｍであ
り、電極の幅はその半分以下にしなければならない。こ
のような微細なパターンは通常のフォトリソグラフィで
は製造が困難となり、高価な製造装置や複雑な製造プロ
セスが必要となってしまう。In the first embodiment described above, the wavelength λ of the fundamental wave is
The shorter F becomes, the shorter the domain inversion period L c becomes, and the electrode period must be made smaller accordingly. For example, if light having a wavelength of 0.84 μm is used as the fundamental wave, the domain inversion period L c is 1.732 μm as described above, and the width of the electrode must be half or less. Such a fine pattern is difficult to manufacture by ordinary photolithography, and an expensive manufacturing apparatus and a complicated manufacturing process are required.
【００２４】そこで第二実施例では、周期的分極反転を
光導波路２２に対して離散的に配置し、分極反転の設け
られていない領域における屈折率差の変化を利用する。
ドメイン反転領域２３では屈折率差の変化は生じない。
櫛形電極２４、２５のそれぞれの歯の部分は光導波路２
２と平行であり、その周期は光導波路２２の間隔によっ
て決まる。したがって、使用する基本波の波長とは無関
係に調節できる。Therefore, in the second embodiment, the periodic polarization inversion is discretely arranged with respect to the optical waveguide 22, and the change in the refractive index difference in the region where the polarization inversion is not provided is utilized.
In the domain inversion region 23, the difference in refractive index does not change.
The tooth portions of the comb-shaped electrodes 24 and 25 are the optical waveguides 2.
It is parallel to 2 and its period is determined by the distance between the optical waveguides 22. Therefore, it can be adjusted regardless of the wavelength of the fundamental wave used.
【００２５】以上の説明では、非線形光学物質としてＬ
ｉＮｂＯ3 を用い、光導波路としてプロトン交換導波路
を用い、第二高調波を発生する場合を例に説明したが、
本発明は、他の材料や他のプロセスにより得られる導波
路を用いた場合や、より高次の高調波の発生の場合にも
本発明を同様に実施できる。In the above description, L is used as the nonlinear optical material.
The case where iNbO 3 is used and a proton exchange waveguide is used as an optical waveguide to generate the second harmonic has been described as an example.
The present invention can be similarly applied to the case where a waveguide obtained by another material or another process is used, or when higher harmonics are generated.
【００２６】[0026]
【発明の効果】以上説明したように、本発明の光高調波
発生素子は、分極反転の周期に合わせて最適な導波路等
価屈折率を得ることができる。したがって、基本波から
高調波への変換効率を高めることができる効果がある。As described above, the optical harmonic generating element of the present invention can obtain an optimum waveguide equivalent refractive index in accordance with the period of polarization inversion. Therefore, there is an effect that the conversion efficiency from the fundamental wave to the harmonic wave can be increased.
【００２７】また、温度変化などの外的要因により分極
反転の周期に変化が生じた場合でも、その変化を簡単に
補正できる効果がある。Further, even if the period of the polarization inversion changes due to an external factor such as a temperature change, the change can be easily corrected.
【図１】本発明第一実施例の光高調波発生素子を示す斜
視図。FIG. 1 is a perspective view showing an optical harmonic generation device of a first embodiment of the present invention.
【図２】本発明第二実施例の光高調波発生素子を示す斜
視図。FIG. 2 is a perspective view showing an optical harmonic generating element of a second embodiment of the present invention.
【図３】従来例の光高調波発生素子を示す斜視図。FIG. 3 is a perspective view showing a conventional optical harmonic generation element.
１１、２１、３１ 基板 １２、２２、３２ 光導波路 １３、２３、３３ ドメイン反転領域 １４、１５、２４、２５ 櫛形電極 11, 21, 31 Substrate 12, 22, 32 Optical waveguide 13, 23, 33 Domain inversion region 14, 15, 24, 25 Comb-shaped electrode
Claims (3)
形成された光高調波発生素子において、 前記光導波路に電界を印加して基本波に対する等価屈折
率と高調波に対する等価屈折率との差を調整する電界印
加手段を備えたことを特徴とする光高調波発生素子。1. An optical harmonic generation device comprising: a substrate of a non-linear optical material; and an optical waveguide formed on the substrate, wherein a periodic polarization inversion is formed across the optical waveguide on the substrate. An optical harmonic generation device comprising an electric field applying means for applying an electric field to an optical waveguide to adjust a difference between an equivalent refractive index for a fundamental wave and an equivalent refractive index for a harmonic.
異なる周期となる形状の周期的分極反転がそれぞれの光
導波路を横切って形成された光高調波発生素子におい
て、 分極が反転する毎に極性が反転する電界を前記複数の光
導波路に印加する手段を備えたことを特徴とする光高調
波発生素子。2. A substrate made of a non-linear optical material and a plurality of optical waveguides formed on the substrate, wherein the substrate has a periodic polarization having a shape having a different period for each of the plurality of optical waveguides. An optical harmonic generation device in which inversion is formed across each optical waveguide, characterized in that it is provided with means for applying to said plurality of optical waveguides an electric field whose polarity is inverted every time the polarization is inverted. Wave generating element.
異なる周期となる形状の周期的分極反転がそれぞれの光
導波路を横切って形成された光高調波発生素子におい
て、 前記周期的分極反転は前記複数の光導波路の長さ方向の
一部に離散的に形成され、 前記複数の光導波路のそれぞれに沿って、前記周期的分
極反転が設けられた部分と設けられていない部分とを含
んで電界を印加する手段を備えたことを特徴とする光高
調波発生素子。3. A substrate of a non-linear optical material, and a plurality of optical waveguides formed on the substrate, wherein the substrate has a periodic polarization having a shape having a different period for each of the plurality of optical waveguides. In the optical harmonic generating element in which inversion is formed across each optical waveguide, the periodic polarization inversion is discretely formed in a part of the length direction of the plurality of optical waveguides, An optical harmonic generation device comprising means for applying an electric field including a portion provided with the periodic polarization inversion and a portion not provided with the periodic polarization inversion along each of them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18320691A JPH05100266A (en) | 1991-06-26 | 1991-06-26 | Optical higher harmonics generating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18320691A JPH05100266A (en) | 1991-06-26 | 1991-06-26 | Optical higher harmonics generating element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05100266A true JPH05100266A (en) | 1993-04-23 |
Family
ID=16131638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18320691A Pending JPH05100266A (en) | 1991-06-26 | 1991-06-26 | Optical higher harmonics generating element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05100266A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05127208A (en) * | 1991-11-06 | 1993-05-25 | Oki Electric Ind Co Ltd | Second harmonic generating element |
| JP2007073552A (en) * | 2005-09-02 | 2007-03-22 | Sony Corp | Laser light generator and image formation apparatus |
| JP2009128819A (en) * | 2007-11-27 | 2009-06-11 | National Institutes Of Natural Sciences | Electrode for periodic polarization reversal, and method for manufacturing periodic polarization reversed element |
-
1991
- 1991-06-26 JP JP18320691A patent/JPH05100266A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05127208A (en) * | 1991-11-06 | 1993-05-25 | Oki Electric Ind Co Ltd | Second harmonic generating element |
| JP2007073552A (en) * | 2005-09-02 | 2007-03-22 | Sony Corp | Laser light generator and image formation apparatus |
| JP2009128819A (en) * | 2007-11-27 | 2009-06-11 | National Institutes Of Natural Sciences | Electrode for periodic polarization reversal, and method for manufacturing periodic polarization reversed element |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110043895A1 (en) | Wavelength converting device, laser, and method to stabilize the wavelength conversion efficiency | |
| EP0664474A1 (en) | Electrically controllable grating, and optical elements having an electrically controllable grating | |
| JP2969787B2 (en) | Domain control method for nonlinear ferroelectric optical materials | |
| US6952307B2 (en) | Electric field poling of ferroelectric materials | |
| JPH05100266A (en) | Optical higher harmonics generating element | |
| EP2245508B1 (en) | Compensation for the gouy phase shift in quasi-phase matching | |
| JP3005225B2 (en) | Method for manufacturing nonlinear ferroelectric optical element having domain inversion structure | |
| JP2910370B2 (en) | Optical wavelength conversion element and short wavelength laser light source using the same | |
| EP0558801A1 (en) | Wavelength converting element | |
| JPH06273816A (en) | Optical waveguide type second higher harmonic generating element | |
| JPH06265956A (en) | Optical wavelength conversion method | |
| JP3049986B2 (en) | Optical wavelength conversion element | |
| JPH06110024A (en) | Light reflector | |
| JP4635246B2 (en) | Polarization inversion method by charge amount control and wavelength conversion element using the same | |
| JPH06102553A (en) | Optical wavelength conversion element and short wavelength laser beam source | |
| WO2002103450A1 (en) | Device for wavelength conversion and optical computing | |
| JP3111955B2 (en) | Wavelength conversion element | |
| US6762874B2 (en) | Polarization inversion method of ferroelectrics and fabrication method of optical wavelength conversion device | |
| JP3447078B2 (en) | Optical wavelength conversion element | |
| JP2002350915A (en) | Wavelength transformation element, optical waveguide device for wavelength transformation, harmonic component generating device and method for manufacturing wavelength transformation element | |
| JP2001109028A (en) | Production of polarization inversion structure | |
| Laurell et al. | Recent developments of periodically poled KTP and isomorphs | |
| JP5403521B2 (en) | Apparatus for forming domain-inverted regions | |
| CN111046588A (en) | Chirp quasiperiodic structure superlattice material and design method thereof | |
| JPH06123903A (en) | Second harmonic wave generator |