JP4825809B2 - 調整可能なグレーティングコンプレッサを備えたパルスレーザ光源 - Google Patents
調整可能なグレーティングコンプレッサを備えたパルスレーザ光源 Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0057—Temporal shaping, e.g. pulse compression, frequency chirping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/062—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam
- B23K26/0622—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses
- B23K26/0624—Shaping the laser beam, e.g. by masks or multi-focusing by direct control of the laser beam by shaping pulses using ultrashort pulses, i.e. pulses of 1ns or less
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/13—Integrated optical circuits characterised by the manufacturing method
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
- G02B6/02133—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating using beam interference
- G02B6/02138—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating using beam interference based on illuminating a phase mask
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
- G02B6/02142—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating based on illuminating or irradiating an amplitude mask, i.e. a mask having a repetitive intensity modulating pattern
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
- G02B6/02147—Point by point fabrication, i.e. grating elements induced one step at a time along the fibre, e.g. by scanning a laser beam, arc discharge scanning
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Lasers (AREA)
- Optical Integrated Circuits (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Description
本願は、全体として参照することにより本明細書に組み込まれる「可視フェムト秒パルスを活用する光導波路書き込み(OPTICAL WAVEGUIDE WRITING UTILIZING VISIBLE FETMOSECOND PULSES)と題される2004年12月20日に出願された米国特許出願番号第60/638,072号に対する優先権を主張する。
光学系20は、約1.0未満及びいくつかの実施形態では約1.0と0.4の間の開口数(NA)を有してよい。低NAの収束型対物レンズが、例えばNA>1.0の油浸対物レンズ及び水浸対物レンズを基準にして焦点深度が長いために三次元導波路パターンの製造を容易にする。また、約520mmに近い可視波長は、近赤外(NIR)波長よりも可視顕微鏡使用で使用される標準高倍率対物レンズと互換性がある。このようにして、この対物レンズにより生じる挿入損失及びビーム収差は大幅に削減される。他のタイプの光学系20が使用可能であり、光学系は特定の実施形態で除外されてよい。
Claims (8)
- 繰り返し周波数が可変の複数の超短光パルスを備えるパルスレーザビームを生じさせるレーザ光源であって、
光パルス幅を有する光パルスを出力するファイバ発振器と、
前記光パルスを受け取るように配置され、前記光パルス幅を拡大し、引き伸ばされた光パルスを生じさせる分散を有するパルスストレッチャと、
前記引き伸ばされた光パルスを受け取り、前記引き伸ばされた光パルスを増幅する利得を有し、前記引き伸ばされた光パルスに自己位相変調の影響を与えて増幅し、該増幅された光パルスのパルス幅を繰り返し周波数の関数として変化させるファイバ増幅器と、
可変光路長を有する光学経路によって互いに分離された、第1及び第2の光学素子を備え、前記光パルス幅を減少させる分散を有し、前記光学経路の光路長を変化することにより、前記分散を、異なる繰り返し周波数について自動的に調整するグレーティングコンプレッサと、
前記第1又は第2の光学素子を移動する移動ステージと、
前記光パルス幅を検知する光学検波器、及び、前記光パルス幅及び前記繰り返し周波数に基づいて前記グレーティングコンプレッサを駆動する制御回路を含むフィードバックシステムと、
を備えることを特徴とするレーザ光源。 - 前記グレーティングコンプレッサが、前記第1及び第2の光学素子として、前記光学経路によって互いに分離された2つのグレーティングを有し、
少なくとも1つのグレーティングが並進移動可能であることを特徴とする請求項1に記載のレーザ光源。 - 前記移動ステージが、前記グレーティングの少なくとも一方を移動させることを特徴とする請求項2に記載のレーザ光源。
- 前記制御回路が、異なった繰り返し周波数のために、前記グレーティングコンプレッサの分散を変化させるように、前記移動ステージに信号を送信することを特徴とする請求項1〜3のいずれか1項に記載のレーザ光源。
- 前記繰り返し周波数に基づいて前記グレーティングコンプレッサの分散を自動的に調整するために、異なった繰り返し周波数及び関連付けられる調整値を含むデータベースを含む記憶装置を更に備えることを特徴とする請求項1〜4のいずれか1項に記載のレーザ光源。
- 前記第1及び第2の光学素子が鏡、グレーティング、プリズム、逆反射体の少なくともいずれかを含むことを特徴とする請求項1に記載のレーザ光源。
- 繰り返し周波数が可変の複数の超短光パルスを備えるパルスレーザビームを生じさせる方法であって、
光パルス幅を有する光パルスを生じさせ、
前記光パルス幅を減少させ、それにより圧縮光パルスを生成し、
前記繰り返し周波数を変え、
前記光パルス幅を検知し、
前記繰り返し周波数の関数としての前記パルス幅の変化を補正するように、前記光パルス幅に基づき、前記異なった繰り返し周波数について自動的にバルクグレーティングコンプレッサの分散を調整し、
前記分散を調整するための値を取得するためにそれと関連付けられる調整値を有するデータベースに記録されている繰り返し周波数と、前記異なった繰り返し周波数を比較すること
を含むことを特徴とする方法。 - 前記異なった繰り返し周波数について自動的にバルクグレーティングコンプレッサの分散を調整して、最小パルス幅を生じさせることを特徴とする請求項7に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US63807204P | 2004-12-20 | 2004-12-20 | |
US60/638,072 | 2004-12-20 | ||
PCT/US2005/046537 WO2007046833A2 (en) | 2004-12-20 | 2005-12-20 | Pulsed laser source with adjustable grating compressor |
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JP2007066456A Division JP2008135673A (ja) | 2004-12-20 | 2007-03-15 | 調整可能なグレーティングコンプレッサを備えたパルスレーザ光源 |
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JP2008518488A JP2008518488A (ja) | 2008-05-29 |
JP4825809B2 true JP4825809B2 (ja) | 2011-11-30 |
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JP2007066456A Pending JP2008135673A (ja) | 2004-12-20 | 2007-03-15 | 調整可能なグレーティングコンプレッサを備えたパルスレーザ光源 |
JP2013000030A Expired - Fee Related JP5716757B2 (ja) | 2004-12-20 | 2013-01-04 | 媒体中に導波路を製造する方法およびシステム |
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JP2007066456A Pending JP2008135673A (ja) | 2004-12-20 | 2007-03-15 | 調整可能なグレーティングコンプレッサを備えたパルスレーザ光源 |
JP2013000030A Expired - Fee Related JP5716757B2 (ja) | 2004-12-20 | 2013-01-04 | 媒体中に導波路を製造する方法およびシステム |
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US (3) | US7684450B2 (ja) |
EP (1) | EP1851837B1 (ja) |
JP (3) | JP4825809B2 (ja) |
WO (1) | WO2007046833A2 (ja) |
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US7684450B2 (en) | 2010-03-23 |
EP1851837A4 (en) | 2009-11-04 |
JP2013070095A (ja) | 2013-04-18 |
US20060285561A1 (en) | 2006-12-21 |
EP1851837A2 (en) | 2007-11-07 |
JP2008518488A (ja) | 2008-05-29 |
WO2007046833A2 (en) | 2007-04-26 |
US20060159137A1 (en) | 2006-07-20 |
EP1851837B1 (en) | 2015-03-04 |
US20100111120A1 (en) | 2010-05-06 |
JP5716757B2 (ja) | 2015-05-13 |
JP2008135673A (ja) | 2008-06-12 |
WO2007046833A3 (en) | 2008-10-09 |
US8077749B2 (en) | 2011-12-13 |
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