JP7162606B2 - パルス群を放出するためのレーザ光源 - Google Patents
パルス群を放出するためのレーザ光源 Download PDFInfo
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Description
- 主レーザパルスが、50psより長いパルス幅に伸長されるように、単一モード増幅光ファイバの上流に配置されたストレッチャと、
- パルス群のパルスが、500fsより短いパルス幅を有するように、パルス群のパルスを時間的に圧縮するための、単一モード増幅光ファイバの下流の圧縮器と、
を更に含む。
- 少なくとも1つの主レーザパルスを放出するステップと、
- 1つ又は複数の干渉計によって、50ps~10nsに含まれる遅延だけ時間的に分離される複数の二次レーザパルスを前記主パルスから生成するステップと、
- 空間的に重ねられたパルスの群を形成するために、二次レーザパルスを単一モード増幅光ファイバに注入するステップと、
を含む方法に関する。
- 主レーザパルスが、50psより長いパルス幅に伸長されるように、主レーザパルスを時間的に伸長するステップと、
- 空間的に重ねられたパルスの群におけるパルスが、500fsより短いパルス幅を有するように、空間的に重ねられたパルスの群におけるパルスを時間的に圧縮するステップと、
を更に含む。
Claims (14)
- パルス群を放出するためのレーザ光源であって、
- 少なくとも1つの主レーザパルスを放出するのに適した主レーザ光源(22)と、
- 前記主レーザパルスから、複数の二次レーザパルス(1、2、11、12、13、14)を形成するのに適した1つ又は複数の干渉計(24、44、54、64、74、76)であって、各干渉計が、50ps~10nsに含まれる遅延(Δt、Δt’)だけ、2つの二次レーザパルスを時間的に分離できるようにする少なくとも1つの遅延線を含み、前記1つ又は複数の干渉計が、前記二次レーザパルスの少なくとも1つをスペクトル的に且つ/又は時間的に形成するための手段を含む1つ又は複数の干渉計(24、44、54、64、74、76)と、
- 空間的に重ねられたパルス(3、4、15、16、17、18)の群を出力として形成するために、前記複数の二次レーザパルスを受信するように意図された単一モード増幅光ファイバ(262)と、
を含むレーザ光源。 - 前記干渉計の少なくとも1つが、前記二次レーザパルスの相対的な光パワーを制御するための手段を含む、請求項1に記載のレーザ光源。
- - 前記主レーザパルスが、50psより長いパルス幅に伸長されるように、前記単一モード増幅光ファイバの上流に配置されたストレッチャ(32)と、
- 前記パルス群の前記パルスが、500fsより短いパルス幅を有するように、前記パルス群の前記パルスを時間的に圧縮するための、前記単一モード増幅光ファイバの下流の圧縮器(36)と、
を更に含む、請求項1又は2に記載のレーザ光源。 - 前記増幅光ファイバの上流に配置された少なくとも1つの光前置増幅器を更に含む、請求項1~3のいずれか一項に記載のレーザ光源。
- 前記単一モード増幅光ファイバ(262)を光学的に励起するためのレーザダイオード(266)を含む、請求項1~4のいずれか一項に記載のレーザ光源。
- 前記単一モード増幅光ファイバが、飽和利得領域で動作するように意図されている、請求項1~5のいずれか一項に記載のレーザ光源。
- 前記主レーザ光源と前記単一モード増幅光ファイバの入口との間の、前記少なくとも1つの主レーザパルス及び前記二次レーザパルスの経路が、全ファイバである、請求項1~6のいずれか一項に記載のレーザ光源。
- 前記主レーザ光源(22)が、少なくとも2μsの遅延だけ時間的に分離される主レーザパルス列を放出するのに適している、請求項1~7のいずれか一項に記載のレーザ光源。
- 前記1つ又は複数の干渉計(24、44、54、64、74、76)が、少なくとも1つのマッハツェンダー干渉計を含み、前記遅延線が、前記干渉計の1つのアームによって形成される、請求項1~8のいずれか一項に記載のレーザ光源。
- レーザ誘起破壊分光法(LIBS)解析システムであって、
- 請求項1~9のいずれか一項に記載の、パルス群を放出するためのレーザ光源(80)と、
- 解析される対象(83)と前記レーザ光源によって放出された前記パルス群との間の相互作用に起因するビームを収集するためのコレクタ(84)と、
- 前記収集されたビームのスペクトル解析に基づいて、解析される前記対象のLIBSスペクトルを取得できるようにする分光計(85)と、
を含む、レーザ誘起破壊分光法(LIBS)解析システム。 - パルス群を生成するための方法であって、以下のステップ、
- 少なくとも1つの主レーザパルスを放出するステップと、
- 50ps~10nsに含まれる遅延だけ時間的に分離される複数の二次レーザパルス(1、2、11、12、13、14)を1つ又は複数の干渉計(24、44、54、64、74、76)によって前記主パルスから生成するステップであって、前記生成ステップが、前記二次レーザパルスの少なくとも1つをスペクトル的に且つ/又は時間的に形成するステップを更に含むステップと、
- 空間的に重ねられたパルス(3、4、15、16、17、18)の群を形成するために、前記二次レーザパルスを単一モード増幅光ファイバ(262)に注入するステップと、
を含む方法。 - 以下のステップ、
- 前記主レーザパルスが、50psより長いパルス幅に伸長されるように、前記主レーザパルスを時間的に伸長するステップと、
- 空間的に重ねられたパルスの前記群における前記パルスが、500fsより短いパルス幅を有するように、空間的に重ねられたパルスの前記群における前記パルスを時間的に圧縮するステップと、
を更に含む、請求項11に記載のパルス群を生成するための方法。 - 前記単一モード増幅光ファイバの利得を飽和させることを更に含む、請求項11又は12に記載のパルス群を生成するための方法。
- 前記二次レーザパルス間の前記遅延を調整することを更に含む、請求項11~13のいずれか一項に記載のパルス群を生成するための方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1751653A FR3063395B1 (fr) | 2017-02-28 | 2017-02-28 | Source laser pour l'emission d'un groupe d'impulsions |
FR1751653 | 2017-02-28 | ||
PCT/EP2018/054829 WO2018158261A1 (fr) | 2017-02-28 | 2018-02-27 | Source laser pour l'emission d'un groupe d'impulsions |
Publications (2)
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JP2020511634A JP2020511634A (ja) | 2020-04-16 |
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JP7215060B2 (ja) * | 2018-10-12 | 2023-01-31 | ウシオ電機株式会社 | 分光分析用光源、分光分析装置及び分光分析方法 |
KR20210118167A (ko) * | 2019-01-31 | 2021-09-29 | 아이피지 포토닉스 코포레이션 | 처프 펄스 증폭 및 맞춤형 펄스 트레인을 갖는 초단파 펄스 레이저 소스 |
US20220337017A1 (en) | 2019-09-26 | 2022-10-20 | Uab ,,Ekspla" | Method for generating gigahertz bursts of pulses and laser apparatus thereof |
GB2593456B (en) * | 2020-03-18 | 2024-02-28 | Thermo Fisher Scient Ecublens Sarl | Double-pulse laser system |
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US20200028316A1 (en) | 2020-01-23 |
EP3590159B1 (fr) | 2021-04-21 |
FR3063395B1 (fr) | 2021-05-28 |
US10879667B2 (en) | 2020-12-29 |
WO2018158261A1 (fr) | 2018-09-07 |
FR3063395A1 (fr) | 2018-08-31 |
EP3590159A1 (fr) | 2020-01-08 |
JP2020511634A (ja) | 2020-04-16 |
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