公开(公告)号：US20060274795A1

公开(公告)日：2006-12-07

申请号：US11407712

申请日：2006-04-20

申请人： Hitoshi Sekita ,  Kazuya Takasago ,  Nobuo Nakata ,  Arata Nakamura

发明人： Hitoshi Sekita ,  Kazuya Takasago ,  Nobuo Nakata ,  Arata Nakamura

IPC分类号： H01S3/13 ,  H01S3/098

CPC分类号： H01S3/005 ,  H01S3/1301 ,  H01S3/235

摘要： A femtosecond laser with stabilized output, and a method for stabilizing the output of a femtosecond laser. The femtosecond laser comprises a regenerative amplifier, a photodetector, a control portion and a variable attenuator, wherein the variable attenuator is provided so as to be capable of controlling an output beam of the regenerative amplifier, the photodetector is provided between the regenerative amplifier and the variable attenuator, the photodetector detects an output beam of the regenerative amplifier and transmits the results of the detection to a power controller, and the power controller controls the variable attenuator depending on the a difference between a predetermined target value and the results.

摘要翻译： 具有稳定输出的飞秒激光器和用于稳定飞秒激光器的输出的方法。 飞秒激光器包括再生放大器，光电检测器，控制部分和可变衰减器，其中可变衰减器被设置为能够控制再生放大器的输出光束，光电检测器设置在再生放大器和 可变衰减器，光电检测器检测再生放大器的输出光束，并将检测结果发送到功率控制器，功率控制器根据预定目标值与结果之间的差异来控制可变衰减器。

公开(公告)号：US07466730B2

公开(公告)日：2008-12-16

申请号：US11407712

申请日：2006-04-20

申请人： Hitoshi Sekita ,  Kazuya Takasago ,  Nobuo Nakata ,  Arata Nakamura

发明人： Hitoshi Sekita ,  Kazuya Takasago ,  Nobuo Nakata ,  Arata Nakamura

IPC分类号： H01S3/13

CPC分类号： H01S3/005 ,  H01S3/1301 ,  H01S3/235

摘要： A femtosecond laser with stabilized output, and a method for stabilizing the output of a femtosecond laser. The femtosecond laser comprises a regenerative amplifier, a photodetector, a control portion and a variable attenuator, wherein the variable attenuator is provided so as to be capable of controlling an output beam of the regenerative amplifier, the photodetector is provided between the regenerative amplifier and the variable attenuator, the photodetector detects an output beam of the regenerative amplifier and transmits the results of the detection to a power controller, and the power controller controls the variable attenuator depending on the a difference between a predetermined target value and the results.

摘要翻译： 具有稳定输出的飞秒激光器和用于稳定飞秒激光器的输出的方法。 飞秒激光器包括再生放大器，光电检测器，控制部分和可变衰减器，其中可变衰减器被设置为能够控制再生放大器的输出光束，光电检测器设置在再生放大器和 可变衰减器，光电检测器检测再生放大器的输出光束，并将检测结果发送到功率控制器，功率控制器根据预定目标值与结果之间的差异来控制可变衰减器。

公开(公告)号：US07123635B2

公开(公告)日：2006-10-17

申请号：US10619305

申请日：2003-07-14

申请人： Yusuke Tamaki ,  Kazuya Takasago ,  Taisuke Miura ,  Hitoshi Sekita

发明人： Yusuke Tamaki ,  Kazuya Takasago ,  Taisuke Miura ,  Hitoshi Sekita

IPC分类号： H01S3/04

CPC分类号： H01S3/042 ,  H01S3/025 ,  H01S3/027 ,  H01S3/0404

摘要： The present invention offers a laser oscillator device having sufficient cooling ability to maintain a lasing medium which generates high-density thermal energy at a temperature appropriate for use, while being capable of being made compact. The laser oscillator device comprises an excitation beam source for generating an excitation beam, a laser medium for receiving the excitation beam and performing optical amplification, a laser oscillator device for causing resonance of light emitted by the laser medium for laser oscillation, and a cooling system for cooling said laser medium, wherein the cooling system uses a gas as the heat-carrying medium.

摘要翻译： 本发明提供了具有足够的冷却能力的激光振荡器装置，以保持在适于使用的温度下产生高密度热能的激光介质，同时能够制造得紧凑。 激光振荡器装置包括用于产生激发光束的激发光束源，用于接收激发光束并执行光放大的激光介质，用于引起由激光介质发射的用于激光振荡的光的共振的激光振荡器装置，以及冷却系统 用于冷却所述激光介质，其中所述冷却系统使用气体作为所述载热介质。

公开(公告)号：US07012940B2

公开(公告)日：2006-03-14

申请号：US10619303

申请日：2003-07-14

申请人： Yusuke Tamaki ,  Hitoshi Sekita ,  Kazuya Takasago ,  Taisuke Miura

发明人： Yusuke Tamaki ,  Hitoshi Sekita ,  Kazuya Takasago ,  Taisuke Miura

IPC分类号： H01S3/00

CPC分类号： H01S3/235 ,  H01S3/08 ,  H01S3/08072 ,  H01S3/106

摘要： The present invention has the object of offering a laser resonator capable of maintaining high amplification efficiency even if the thermal lensing effect occurring in the laser medium varies during operation or over repeated operation and suspension of the laser device. The laser resonator comprises at least a pair of reflection portions (planar reflective mirrors 3) provided such as to allow a laser beam to oscillate therebetween; a laser medium provided on the optical path of the laser between the pair of reflection portions; an excitation portion (excitation laser device 5) for exciting the laser medium; an optical system (convex lens 1) provided on the optical path of the laser beam between the laser medium and the pair of reflection portions for changing the state of the laser in the laser medium; and a movement portion for moving the optical system along the optical axis of the laser.

摘要翻译： 本发明的目的是提供一种激光谐振器，即使在激光介质中发生的热透镜效应在操作期间或者在激光装置的重复操作和暂停时都会发生变化时，其能够保持高的放大效率。 激光谐振器包括至少一对反射部分（平面反射镜3），其被设置为允许激光束在它们之间振荡; 设置在所述一对反射部之间的所述激光的光路上的激光介质; 用于激发激光介质的激励部分（激发激光装置5） 在激光介质和一对反射部分之间设置在激光束的光路上的光学系统（凸透镜1），用于改变激光介质中激光的状态; 以及用于沿着激光的光轴移动光学系统的移动部分。

公开(公告)号：US06882469B2

公开(公告)日：2005-04-19

申请号：US10619310

申请日：2003-07-14

申请人： Yusuke Tamaki ,  Kazuya Takasago ,  Taisuke Miura ,  Hitoshi Sekita

发明人： Yusuke Tamaki ,  Kazuya Takasago ,  Taisuke Miura ,  Hitoshi Sekita

IPC分类号： G02F1/03 ,  H01S3/107 ,  H01S3/23 ,  H01S3/00

CPC分类号： H01S3/235 ,  H01S3/1075

摘要： The invention offers a regenerative optical amplifier enabling voltage to be easily applied to polarizing elements such as Pockels cells, without the need for complicated drive circuitry. An input beam of S-polarized light is reflected by a polarizer 1 and advances to a Pockels cell 2. In the time it takes for the input beam, having once passed through the Pockels cell 2, to be reflected by a reflective mirror 3 and return to the Pockels cell 2, a voltage VP1 causing a 90-degree rotation in the polarization of transmitted light is applied to the Pockels cell 2, and this applied voltage VP1 is maintained. The input beam is converted by the Pockels cell 2 into a P-polarized light pulse which is transmitted by the polarizer. Subsequently, the light pulse is converted from P-polarized light to S-polarized light and back to P-polarized light with each roundtrip of the Pockels cell 2, while passing each time between the reflective mirror 3, laser crystal 4 and reflective mirror 7, so as to be amplified in the resonator formed thereby. The amplified light pulse is extracted by applying a voltage VP2 causing a 90-degree rotation of the polarization of the transmitted light to the Pockels cell 6 to convert the light pulse to S-polarized light which is then reflected out of the resonator by the polarizer 5.

摘要翻译： 本发明提供一种再生式光放大器，其使电压容易地应用于诸如Pockels电池的偏振元件，而不需要复杂的驱动电路。 S偏振光的输入光束被偏振器1反射并前进到Pockels单元2。 在输入光束一旦经过普克尔斯单元2而被反射镜3反射并返回到普克尔斯单元2的时候，将产生90度的电压V P1， 透射光的偏振度的旋转角度被施加到普克尔斯单元2，并且保持该施加电压V P1。 输入光束由Pockels单元2转换成由偏振器透射的P偏振光脉冲。 随后，光脉冲从P偏振光转换成S偏振光，并且随着普克尔斯单元2的每个往返光而被转换成P偏振光，同时每次在反射镜3，激光晶体4和反射镜7之间通过 以便在由此形成的谐振器中被放大。 通过施加将透射光的偏振90度旋转到Pockels单元6的电压V P2 P2来提取放大的光脉冲，以将光脉冲转换成S偏振光 由偏振器5反射出谐振器。