JP6331486B2 - レーザ媒質ユニット、レーザ増幅器及びレーザ発振器 - Google Patents
レーザ媒質ユニット、レーザ増幅器及びレーザ発振器 Download PDFInfo
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- 238000005086 pumping Methods 0.000 description 7
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- ZPDRQAVGXHVGTB-UHFFFAOYSA-N gallium;gadolinium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Gd+3] ZPDRQAVGXHVGTB-UHFFFAOYSA-N 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
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- 230000009466 transformation Effects 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
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- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
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- 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
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
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- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10013—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by controlling the temperature of the active medium
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1611—Solid materials characterised by an active (lasing) ion rare earth neodymium
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- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/163—Solid materials characterised by a crystal matrix
- H01S3/164—Solid materials characterised by a crystal matrix garnet
- H01S3/1643—YAG
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Description
図16は、一実施形態に係るレーザ媒質ユニットを備えたレーザ発振器の構成を概略的に示す図面である。
Claims (9)
- 活性元素が添加されており励起光が照射されることにより放出光を発生する少なくとも一つのレーザ利得媒質が、活性元素が添加されておらず、前記励起光及び前記放出光の双方を透過させる光学媒質の第1面と、前記第1面と反対側に位置する第2面とに、それぞれ接合されてなる、レーザ媒質体と、
前記レーザ媒質体を収容すると共に、前記レーザ利得媒質を冷却する冷却媒質を流す冷却媒質流路を有する容器と、
を備え、
前記冷却媒質流路は、前記冷却媒質によって前記レーザ利得媒質を冷却する冷却流路を有し、
前記冷却流路の前記冷却媒質の流れ方向に直交する断面において、前記レーザ利得媒質と、前記レーザ利得媒質に対向する前記冷却流路の内面との距離が、前記レーザ利得媒質に対する励起光の照射領域内の強度分布のうち強度の高い領域より低い領域において短く、
前記冷却流路において前記レーザ利得媒質に対する前記冷却媒質の流れ方向は、前記第1面及び前記第2面のうち当該レーザ利得媒質が接合されている面に平行かつ一方向である、
レーザ媒質ユニット。 - 前記第1面及び前記第2面それぞれに複数の前記レーザ利得媒質が接合されており、
前記冷却媒質流路は、各前記レーザ利得媒質に対して前記冷却流路を有する、
請求項1に記載のレーザ媒質ユニット。 - 前記第2面に接合される前記複数のレーザ利得媒質の各々は、前記第1面に接合される前記複数のレーザ利得媒質の各々に対向している、
請求項2記載のレーザ媒質ユニット。 - 前記容器は、前記第1面及び前記第2面それぞれに接合された前記複数のレーザ利得媒質のうち隣接する前記レーザ利得媒質それぞれに対応する前記冷却流路を仕切る仕切り壁を有しており、
隣接する前記レーザ利得媒質の配置方向における前記仕切り壁の長さは、隣接する前記レーザ利得媒質の間の長さに実質的に等しく、
前記第1面及び前記第2面のうち隣接する前記レーザ利得媒質が接合されている面の法線方向における前記仕切り壁の長さは、隣接する前記レーザ利得媒質が接合されている面と前記容器の内面との間の距離に実質的に等しい、
請求項2又は3記載のレーザ媒質ユニット。 - 前記第1面及び前記第2面は矩形を有し、
前記第1面及び前記第2面それぞれに接合された前記複数のレーザ利得媒質は、前記矩形の長手方向に配置されており、
前記冷却媒質の流れ方向は前記矩形の短手方向である、
請求項2〜4の何れか一項記載のレーザ媒質ユニット。 - 前記冷却流路の前記冷却媒質の流れ方向に直交する断面の形状が三角形、五角形又は円弧である、請求項1〜5の何れか一項記載のレーザ媒質ユニット。
- 前記レーザ媒質ユニットは、
前記第1面に接合された少なくとも一つのレーザ利得媒質の前記光学媒質と反対側に設けられる第1のヒートシンクと、
前記第2面に接合された少なくとも一つのレーザ利得媒質の前記光学媒質と反対側に設けられる第2のヒートシンクと、
を更に有する、
請求項1〜6の何れか一項記載のレーザ媒質ユニット。 - 請求項1〜7の何れか一項記載のレーザ媒質ユニットと、
光増幅されるべきレーザ光を前記光学媒質に前記励起光と同軸の光路で入射させる入射光学系と、
前記レーザ利得媒質によって増幅され前記励起光と同軸の光路で前記レーザ媒質体から出射された前記レーザ光を前記励起光の光路とは異なる方向に出力する出力光学系と、
を備える、
レーザ増幅器。 - 請求項1〜7の何れか一項記載のレーザ媒質ユニットと、
前記レーザ媒質ユニットが有する前記レーザ媒質体を、共振光路上に有する光共振器と、
を備えるレーザ発振器。
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