JP6955302B2 - 光学素子の製造方法及び光学素子 - Google Patents
光学素子の製造方法及び光学素子 Download PDFInfo
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Description
なお、ガーネットにはYAG,YSAG,YGAG,GGG,GSGG,LuAG,YALOなどの酸化物、バナデートは、例えばYVO4もしくはGdVO4,LuVO4等のVO4化合物、セクスオキサイドはY2O3,Sr2O3,Lu2O3,フロライドにはYLF,SrF2,CaF2などのフッ化物、アパタイトにはFAP,SFAP,VAP,SVAPなどリン酸系カルシウム化合物、タングステートとはKYW,KGWなどのWO4化合物である。機能性光学材料は、例えば水晶、LBO、LiNbO3、KTiPO4、ZGP、GaAsもしくはGaP,ZnSe,ZnSなど非線形感受率や電気光学効果、磁気光学効果を有する材料である。セラミックスは、例えば、TGG(テルビウム・ガリウム・ガーネット)、TAG(テルビウム・アルミニウム・ガーネット)、TSAG(テルビウム・スカンジウム・アルミニウム・ガーネット)セラミックス等のファラデー効果を有するものが挙げられる。
(構成例1)
レーザ媒質と、当該レーザ媒質に積層されたQスイッチ素子と、これらの間の結晶化層と、を備えた光学素子。
(構成例2)
透明ヒートシンクと、当該ヒートシンクに積層されたレーザ媒質と、これらの間の結晶化層と、を備えた光学素子。
(構成例3)
透明ヒートシンクと、当該透明ヒートシンクに積層されたレーザ媒質と、当該レーザ媒質に積層されたQスイッチ素子と、透明ヒートシンクとレーザ媒質との間の結晶化層と、レーザ媒質とQスイッチとの間の結晶化層と、を備えた光学素子。
(構成例4)
透明ヒートシンクと、当該透明ヒートシンクに積層されたレーザ媒質と、当該レーザ媒質に積層されたQスイッチ素子と、当該Qスイッチに積層された透明ヒートシンクと、透明ヒートシンクとそれに隣接するレーザ媒質との間の結晶化層と、レーザ媒質とQスイッチとの間の結晶化層と、Qスイッチ素子とそれに隣接する透明ヒートシンクとの間の結晶化層と、を備えた光学素子。
Claims (12)
- レーザ光が透過、往復又は反射する光学素子を製造する方法であって、
前記レーザ光に対して透明な第1素子部及び第2素子部が非晶質層を介して表面活性接合されてなる接合素子を得る第1ステップと、
前記第1ステップの後、前記接合素子を昇温することで、前記非晶質層の少なくとも一部を結晶化する第2ステップと、を備え、
前記第2ステップにおいては、前記第1素子部及び前記第2素子部の融点よりも低い所定温度まで前記接合素子を昇温する、光学素子の製造方法。 - 前記第1ステップでは、略真空環境下において、前記第1素子部の接合側の表面及び前記第2素子部の接合側の表面の少なくとも何れかにイオンビーム又は高速原子ビームを照射した後、前記第1素子部の前記表面と前記第2素子部の前記表面とを接触させることで、前記接合素子を得る、請求項1に記載の光学素子の製造方法。
- 前記第1ステップにおいて、前記非晶質層は、前記第1素子部及び前記第2素子部を構成する物質以外の不純物として、前記イオンビーム又は前記高速原子ビームを構成するビーム源元素、及び、前記イオンビーム又は前記高速原子ビームのビーム筐体を構成するビーム筐体材料の少なくとも何れかを含む、請求項2に記載の光学素子の製造方法。
- 前記第1素子部は、ダイアモンド、シリコンカーバイド、サファイア、YAGを含むガーネット、バナデート、セクスオキサイド、フロライド、アパタイト、タングステート、シリケート、リン酸系の材料、希土類イオンもしくは遷移金属を添加したレーザ材料、光スイッチ材料、非線形光学材料、又は、機能性光学材料であり、
前記第2素子部は、金、銅、銅タングステン、アルミニウム、鉄、チタン、或いは、これらのうちの少なくとも何れかの合金を含む金属、ダイアモンド、シリコンカーバイド、サファイア、YAGを含むガーネット、バナデート、セクスオキサイド、フロライド、アパタイト、タングステート、シリケート、リン酸系の材料、希土類イオンもしくは遷移金属を添加したレーザ材料、光スイッチ材料、非線形光学材料、又は、機能性光学材料であり、
前記第2ステップの前記所定温度は、100℃以上で且つ前記非晶質層を構成する物質の融点より低い温度である、請求項1〜3の何れか一項に記載の光学素子の製造方法。 - 前記第1素子部及び第2素子部の状態は、単結晶、アモルファス(ガラスを含む)、又はセラミックスである、請求項1〜3の何れか一項に記載の光学素子の製造方法。
- 前記第1素子部及び前記第2素子部の少なくとも一方は、その接合側部分に光学コーティング層を有し、
前記所定温度は、100℃以上600℃以下である、請求項4に記載の光学素子の製造方法。 - 前記光学コーティングの最終層は、昇温処理により透明となる層を有する、請求項6に記載の光学素子の製造方法。
- 前記第2ステップで前記非晶質層を結晶化してなる結晶化層が有する界面の平面度は、前記非晶質層が有する界面の平面度よりも高い、請求項1〜7の何れか一項に記載の光学素子の製造方法。
- レーザ光が透過、往復又は反射する光学素子であって、
前記レーザ光に対して透明な第1素子部及び第2素子部と、
前記第1素子部と前記第2素子部との間に介在され、結晶化してなる結晶化層と、を備え、
前記結晶化層は、前記第1素子部側から前記第2素子部側に行くに従って、10nm領域で前記第1素子部を構成する元素が連続的に前記第2素子部を構成する元素に交換している、光学素子。 - 前記結晶化層は、Ar、Ne、Xe、He、Fe、Ni及びCrの少なくとも何れかを含む、請求項9に記載の光学素子。
- レーザ光が透過、往復又は反射する光学素子であって、
前記レーザ光に対して透明な第1素子部及び第2素子部と、
前記第1素子部と前記第2素子部との間に介在され、結晶化してなる結晶化層と、を備え、
前記第1素子部及び前記第2素子部の少なくとも一方は、その接合側部分に光学コーティング層を有し、
前記光学コーティング層に接する前記第1素子部又は前記第2素子部の結晶化層において、10nm領域で前記第1素子部又は前記第2素子部を構成する元素が連続的に前記光学コーティング層を構成する元素に交換している、光学素子。 - 前記第1素子部及び前記第2素子部の少なくとも一方は、その接合側部分に光学コーティング層を有し、
前記結晶化層は、Ar、Ne、Xe、He、Fe、Ni及びCrの少なくとも何れかを含む、請求項9に記載の光学素子。
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