JP2021530116A - キャビティ内コーティングを備えたパッシブqスイッチマイクロチップレーザー、及びそのマイクロチップレーザーを備えたハンドピース - Google Patents
キャビティ内コーティングを備えたパッシブqスイッチマイクロチップレーザー、及びそのマイクロチップレーザーを備えたハンドピース Download PDFInfo
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Abstract
Description
パッシブQスイッチマイクロチップレーザーは、数十年にわたり広く研究されてきた。しかしながら、ほとんどの研究は、数ミリジュール未満のパルスエネルギー及び10MW未満のピーク出力の発生を報告している[1〜15、19、21〜26、28、29]。特に、いくつかのマイクロチップレーザーは、ナノ秒レーザーパルス幅(パルス持続時間)しか生成できなかった[3、4、7、13、23、及び24]。ごく最近、X. Guoらは、Yb:YAG/Cr:YAGマイクロチップレーザーからの12mJの出力の発生を実証した[1]。しかし、比較的長いパルス幅(1.8ns)に起因して、〜3.7MWのピーク出力しか達成されなかった。さらに、そのレーザーは、極低温環境下(すなわち、77ケルビン)で動作させられなければならず、これが実用的な応用を問題のあるものとする。本発明者の知る限りにおいて、パッシブQスイッチマイクロチップレーザーから直接の100MWを超える(>100MW)ナノ秒未満(サブナノセカンド)のレーザーパルスの発生は報告されていない。
本開示のピコ秒レーザーパルスを生成する高ピーク出力マイクロチップレーザーの潜在的かつ有望な応用の1つは、コスメティック(美容)用及び医療用のレーザーシステムにおけるものであろう。高エネルギー短パルスマイクロチップレーザーは、有意義な美容処置、特に、分割(フラクショナル)皮膚若返り術を実施するためのハンドピース内にマイクロチップレーザーを包含することを支援する。1レーザービーム当たり4mJの数百ピコ秒のレーザーパルスが、レーザー誘起オプティカルブレイクダウン(LIOB)あるいはメラニン補助オプティカルブレイクダウンによって、組織あるいは皮膚の微小損傷を引き起こすのに十分であることが、臨床的に実証された。そのような微小損傷によって刺激されるその後のコラーゲン再構築が、皮膚の若返りをもたらし得る。本開示のマイクロチップレーザーは、波長が1064nmの40mJを超える300psのレーザーパルスを発生することができる。したがって、このマイクロチップレーザーからの出力エネルギーを、例えば、10個の微小ビーム(ただし、他の数の微小ビームも可能である)に分割することができる。各微小ビームは、効果的な皮膚処置のために十分な4mJを超えるエネルギーを有し得る。各微小ビームは、10個の微小ドットを発生するために、集束(フォーカシング)光学系によって集束されてよい。
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Claims (25)
- マイクロチップレーザーであって、
入力面及び出力面を備えたレーザー媒質と、
マイクロチップレーザー波長において高反射性かつポンプ波長において高透過性の誘電体コーティングでコートされた入力面と、
ポンプ波長において高反射性かつQスイッチレーザー波長において高透過性の誘電体コーティングでコートされた出力面と、
分子間力によってマイクロチップレーザーに取り付けられ、出力面がマイクロチップレーザー波長において部分反射性の誘電体コーティングによってコートされた可飽和吸収体と、
を有するマイクロチップレーザー。 - 出力面のコーティングは、モノリシック材料が形成された際にコーティングが要求に応じて機能するように、レーザー媒質及び可飽和吸収体の屈折率を考慮してなる請求項1に記載のマイクロチップレーザー。
- レーザー媒質材料及び可飽和吸収体は、同一の母材で形成されている請求項1に記載のマイクロチップレーザー。
- レーザー媒質材料及び可飽和吸収体は、異なる母材で形成されている請求項1に記載のマイクロチップレーザー。
- レーザー媒質と可飽和吸収体との間の結合は、分子間力による光学的接触によって行われている請求項1に記載のマイクロチップレーザー。
- 前記マイクロチップレーザーは、ダブルパスポンプマイクロチップレーザーである請求項1に記載のマイクロチップレーザー。
- ダブルパスポンプマイクロチップレーザーが、ポンプレーザー吸収と、より短いパルス幅及びよりコンパクトなレーザーレイアウトをもたらすより短い媒質長さと、を支援する請求項1に記載のマクロチップレーザー。
- レーザー媒質と可飽和吸収体との間の接合部分におけるポンプ波長において高反射性の誘電体コーティングが、ダブルパスポンプの達成を支援し、未吸収のポンプレーザーによるパッシブQスイッチの望まない退色を避ける請求項1に記載のマイクロチップレーザー。
- ハンドピースボディーであって、
ハンドピースボディー内に配置され皮膚に適用されるように構成されたマイクロチップレーザーと、
ポンプレーザーに対する光ファイバー接続部と、
マイクロチップレーザーによって発されたソリッドビームを分解して皮膚の一部を横切るマクロビームのアレイを形成するように構成された分割走査システムと、
を収容するハンドピースボディーを有し、
前記マイクロチップレーザーは、高出力ピコ秒短パルスエネルギーを発生するマイクロチップレーザーハンドピース。 - 前記ハンドピースボディーは、皮膚に適用され該皮膚上をスライドするように適合されている請求項9に記載のマイクロチップレーザーハンドピース。
- 走査システムは、一対のミラーを含む一群の走査システムのうちの1つである請求項9に記載のマイクロチップレーザーハンドピース。
- 走査ビームは、レンズアレイ上に入射してマイクロビームアレイを形成する請求項9に記載のマイクロチップレーザーハンドピース。
- レンズアレイ上のレーザースポットサイズは、各レンズが、1064nmにおいて4mJまで、及び532nmにおいて2mJまでを通すように決定される請求項10に記載のマイクロチップレーザーハンドピース。
- 前記ハンドピースは更に、1−D分割マイクロドットラインを生成するように構成されたホログラフィック1−Dビームスプリッターを有する請求項9に記載のマイクロチップレーザーハンドピース。
- 1−D分割マイクロドットラインと直交する方向に沿う前記ハンドピースの手動による移動が、2−D分割ビームパターンを生成する請求項14に記載のマイクロチップレーザーハンドピース。
- 前記ハンドピースボディーは、追加のレーザー光波長を発生するためのオプションの第二高調波発生器を収容する請求項9に記載のマイクロチップレーザーハンドピース。
- 前記ハンドピースボディーのスライド速度が、レーザービームによって処置される皮膚の範囲を決定する請求項9に記載のマイクロチップレーザーハンドピース。
- ポンプレーザービームを供給するように構成されたポンプレーザーと、
ハンドピースであって、
前記ポンプレーザービームを受けるように構成され、利得媒質及び可飽和吸収体によって形成されたキャビティを備えたマイクロチップレーザーと、
前記マイクロチップレーザーによって発されたレーザービームによって活性化されるパッシブQスイッチ素子と、
を備えたハンドピースと、
を有し、
超短高出力レーザーパルスを発生するレーザーシステム。 - 前記マイクロチップレーザーは、ダブルパスポンプマイクロチップレーザーである請求項15に記載のレーザーシステム。
- ダブルパスポンプマイクロチップレーザーが、十分なポンプレーザー吸収と、より短いパルス及びよりコンパクトなレーザーレイアウトをもたらすより短い媒質長さと、を支援する請求項16に記載のレーザーシステム。
- 前記マイクロチップレーザーの高反射性の誘電体コーティングフィルムが、ダブルパスポンプの達成を支援し、未吸収のポンプレーザーによるパッシブQスイッチの望まない退色を避ける請求項15に記載のレーザーシステム。
- レーザー媒質と可飽和吸収体との間の結合は、分子間力による光学的接触によって行われている請求項15に記載のレーザーシステム。
- 利得媒質及び可飽和吸収体は、同一の母材で形成されている請求項15に記載のレーザーシステム。
- 利得媒質及び可飽和吸収体は、異なる母材で形成されている請求項15に記載のレーザーシステム。
- 前記ポンプレーザーは、アレキサンドライトレーザーである請求項15に記載のレーザーシステム。
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IL310192B1 (en) | 2024-04-01 |
US10622780B2 (en) | 2020-04-14 |
US11271356B2 (en) | 2022-03-08 |
JP2024063207A (ja) | 2024-05-10 |
EP4340139A3 (en) | 2024-06-05 |
US20200203913A1 (en) | 2020-06-25 |
IL310192A (en) | 2024-03-01 |
US20190393668A1 (en) | 2019-12-26 |
IL310191A (en) | 2024-03-01 |
WO2019245937A1 (en) | 2019-12-26 |
KR20210021345A (ko) | 2021-02-25 |
CN112425014B (zh) | 2024-07-02 |
IL279555A (en) | 2021-01-31 |
CN112425014A (zh) | 2021-02-26 |
EP3811472A1 (en) | 2021-04-28 |
EP4336678A2 (en) | 2024-03-13 |
EP4340139A2 (en) | 2024-03-20 |
IL310191B1 (en) | 2024-04-01 |
EP4336678A3 (en) | 2024-06-05 |
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