JP7465314B2 - 外科適用例に調整されたレーザパルス - Google Patents
外科適用例に調整されたレーザパルス Download PDFInfo
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Description
Claims (13)
- システムであって、
レーザ用媒質と、
時間的に離間した複数の電気パルスを、前記レーザ用媒質を光ポンピングするデバイスに差し向けるように構成されたコントローラと、を有し、
前記レーザ用媒質は、光ポンピングに応答して、準連続レーザパルスを出力するように構成され、
前記時間的に離間した複数の電気パルスは、(a)第1の電気パルスと、(b)前記第1の電気パルスに続く複数の第2の電気パルスを含み、
前記第1の電気パルスは、前記レーザ用媒質のレーザ発光閾値よりも低いエネルギレベルまで前記レーザ用媒質を励起させるように構成され、
前記準連続レーザパルスは、前記複数の第2の電気パルスに応答して出力され、
前記準連続レーザパルスのレーザパルス持続時間は、約250μs~10msである、システム。 - 前記レーザ用媒質は、Ho:YAG、Tm:YAG、Tm:Ho:YAG、Er:YAG、Er:YLF、Nd:YAG、Tm-ファイバレーザ、及びCTH:YAGのうちの1つを含む、請求項1に記載のシステム。
- 前記複数の第2の電気パルスの各電気パルスは、約10~1000μsの電気パルス持続時間を有する、請求項1又は2に記載のシステム。
- 前記複数の第2電気パルスのうちの隣接した電気パルスの間隔は、約10~300μsである、請求項1~3のいずれか1項に記載のシステム。
- 前記準連続レーザパルスの電力は、約100W~1KWである、請求項1~4のいずれか1項に記載のシステム。
- 前記準連続レーザパルスは、連続波形を有し、又は、複数の時間的に離間した電気パルスを有する、請求項1~5のいずれか1項に記載のシステム。
- 前記第1の電気パルスは、前記レーザ発光閾値の約80%よりも高く且つ前記レーザ発光閾値よりも低いエネルギレベルまで、前記レーザ用媒質を励起させるように構成される、請求項1~6のいずれか1項に記載のシステム。
- レーザ用媒質を有するシステムを使用する方法であって、
時間的に離間した複数の電気パルスを、レーザ用媒質を光ポンピングするデバイスに差し向ける段階を含み、
前記時間的に離間した複数の電気パルスは、(a)第1の電気パルスと、(b)前記第1の電気パルスに続く複数の第2の電気パルスを含み、前記第1の電気パルスは、前記レーザ用媒質のレーザ発光閾値よりも低いエネルギレベルまで、前記レーザ用媒質を励起させるように構成され、
更に、前記時間的に離間した複数の第2電気パルスに応答して、前記レーザ用媒質から準連続レーザパルスを出力する段階を含み、
前記時間的に離間した複数の第2の電気パルスの各電気パルスは、約10~1000μsの電気パルス持続時間を有し、前記時間的に離間した複数の第2電気パルスのうちの隣接した電気パルスの間隔は、約10~300μsである、方法。 - 前記準連続レーザパルスのレーザパルス持続時間は、約250μs~10msであり、前記準連続レーザパルスの電力は、約100W~1KWである、請求項8に記載の方法。
- 前記第1の電気パルスは、前記レーザ発光閾値の約80%よりも高く且つ前記レーザ発光閾値よりも低いエネルギレベルまで、前記レーザ用媒質を励起させるように構成される、請求項8又は9に記載の方法。
- 前記レーザ用媒質は、Ho:YAG、Tm:YAG、Tm:Ho:YAG、Er:YAG、Er:YLF、Nd:YAG、Tm-ファイバレーザ、及びCTH:YAGのうちの1つを含む、請求項8~10のいずれか1項に記載の方法。
- 前記第1の電気パルスは、単一のプレパルスであり、前記準連続レーザパルスは、(a)連続波形を有する単一のレーザパルス、及び、(b)複数の時間的に離間したレーザパルスのうちの一方である、請求項8~11のいずれか1項に記載の方法。
- 前記複数の第2の電気パルスは、第1のパルスセット及び第2のパルスセットを含み、前記第1のパルスセットの持続時間、パルス間隔、及び大きさのうちの少なくとも1つは、それに対応する前記第2のパルスセットの持続時間、パルス間隔、及び大きさと異なる、請求項8~12のいずれか1項に記載の方法。
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