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1. 发明授权

US07050474B2 High peak-power kilohertz laser system employing single-stage multi-pass amplification 失效
标题翻译：采用单级多通道放大的高峰值功率千赫兹激光系统
公开(公告)号：US07050474B2
公开(公告)日：2006-05-23
申请号：US10656343
申请日：2003-09-05
申请人： Bing Shan , Chun Wang , Zenghu Chang
发明人： Bing Shan , Chun Wang , Zenghu Chang
IPC分类号： H01S3/091
CPC分类号： H01S3/2325 , H01S3/005 , H01S3/094038 , H01S3/1625 , H01S3/1636
摘要： The present invention describes a technique for achieving high peak power output in a laser employing single-stage, multi-pass amplification. High gain is achieved by employing a very small “seed” beam diameter in gain medium, and maintaining the small beam diameter for multiple high-gain pre-amplification passes through a pumped gain medium, then leading the beam out of the amplifier cavity, changing the beam diameter and sending it back to the amplifier cavity for additional, high-power amplification passes through the gain medium. In these power amplification passes, the beam diameter in gain medium is increased and carefully matched to the pump laser's beam diameter for high efficiency extraction of energy from the pumped gain medium. A method of “grooming” the beam by means of a far-field spatial filter in the process of changing the beam size within the single-stage amplifier is also described.
摘要翻译：本发明描述了在采用单级多通道放大的激光器中实现高峰值功率输出的技术。通过在增益介质中采用非常小的“种子”光束直径来实现高增益，并且通过泵浦增益介质保持多个高增益预放大通过的小光束直径，然后将光束导出放大器腔，改变光束直径并将其发送回放大器腔，用于额外的高功率放大，通过增益介质。在这些功率放大通路中，增益介质中的光束直径增加并仔细地匹配于泵激光器的光束直径，用于从泵浦增益介质中高效提取能量。还描述了在改变单级放大器内的光束尺寸的过程中借助于远场空间滤波器“修整”光束的方法。

2. 发明申请

US20100061411A1 METHOD AND APPARATUS FOR CONTROLLING CARRIER ENVELOPE PHASE 有权
标题翻译：用于控制载体包络相的方法和装置
公开(公告)号：US20100061411A1
公开(公告)日：2010-03-11
申请号：US12306348
申请日：2007-06-21
申请人： Zenghu Chang , Chengquan Li , Eric Moon
发明人： Zenghu Chang , Chengquan Li , Eric Moon
IPC分类号： H01S3/13
CPC分类号： H01S3/0057 , H01S2301/08
摘要： A chirped pulse amplification laser system. The system generally comprises a laser source, a pulse modification apparatus including first and second pulse modification elements separated by a separation distance, a positioning element, a measurement device, and a feedback controller. The laser source is operable to generate a laser pulse and the pulse modification apparatus operable to modify at least a portion of the laser pulse. The positioning element is operable to reposition at least a portion of the pulse modification apparatus to vary the separation distance. The measurement device is operable to measure the carrier envelope phase of the generated laser pulse and the feedback controller is operable to control the positioning element based on the measured carrier envelope phase to vary the separation distance of the pulse modification elements and control the carrier envelope phase of laser pulses generated by the laser source.
摘要翻译：啁啾脉冲放大激光系统。该系统通常包括激光源，包括由分离距离分开的第一和第二脉冲修改元件，定位元件，测量装置和反馈控制器的脉冲修改设备。激光源可操作以产生激光脉冲，并且脉冲修改装置可操作以修改激光脉冲的至少一部分。定位元件可操作以重新定位脉冲修改设备的至少一部分以改变间隔距离。测量装置可操作以测量产生的激光脉冲的载波包络相位，并且反馈控制器可操作以基于测量的载波包络相位来控制定位元件，以改变脉冲修改元件的间隔距离并控制载波包络相位由激光源产生的激光脉冲。

3. 发明授权

US08073026B2 Method and apparatus for controlling carrier envelope phase 有权
标题翻译：用于控制载波包络相的方法和装置
公开(公告)号：US08073026B2
公开(公告)日：2011-12-06
申请号：US12306348
申请日：2007-06-21
申请人： Zenghu Chang , Chengquan Li , Eric Moon
发明人： Zenghu Chang , Chengquan Li , Eric Moon
IPC分类号： H01S3/13
CPC分类号： H01S3/0057 , H01S2301/08
摘要： A chirped pulse amplification laser system. The system generally comprises a laser source, a pulse modification apparatus including first and second pulse modification elements separated by a separation distance, a positioning element, a measurement device, and a feedback controller. The laser source is operable to generate a laser pulse and the pulse modification apparatus operable to modify at least a portion of the laser pulse. The positioning element is operable to reposition at least a portion of the pulse modification apparatus to vary the separation distance. The measurement device is operable to measure the carrier envelope phase of the generated laser pulse and the feedback controller is operable to control the positioning element based on the measured carrier envelope phase to vary the separation distance of the pulse modification elements and control the carrier envelope phase of laser pulses generated by the laser source.
摘要翻译：啁啾脉冲放大激光系统。该系统通常包括激光源，包括由分离距离分开的第一和第二脉冲修改元件，定位元件，测量装置和反馈控制器的脉冲修改设备。激光源可操作以产生激光脉冲，并且脉冲修改装置可操作以修改激光脉冲的至少一部分。定位元件可操作以重新定位脉冲修改设备的至少一部分以改变间隔距离。测量装置可操作以测量产生的激光脉冲的载波包络相位，并且反馈控制器可操作以基于测量的载波包络相位来控制定位元件，以改变脉冲修改元件的间隔距离并控制载波包络相位由激光源产生的激光脉冲。

4. 发明申请

US20050053105A1 High peak-power kilohertz laser system employing single-stage multi-pass amplification 失效
标题翻译：采用单级多通道放大的高峰值功率千赫兹激光系统
公开(公告)号：US20050053105A1
公开(公告)日：2005-03-10
申请号：US10656343
申请日：2003-09-05
申请人： Bing Shan , Chun Wang , Zenghu Chang
发明人： Bing Shan , Chun Wang , Zenghu Chang
IPC分类号： H01S3/00 , H01S3/094 , H01S3/10 , H01S3/16 , H01S3/23
CPC分类号： H01S3/2325 , H01S3/005 , H01S3/094038 , H01S3/1625 , H01S3/1636
摘要： The present invention describes a technique for achieving high peak power output in a laser employing single-stage, multi-pass amplification. High gain is achieved by employing a very small “seed” beam diameter in gain medium, and maintaining the small beam diameter for multiple high-gain pre-amplification passes through a pumped gain medium, then leading the beam out of the amplifier cavity, changing the beam diameter and sending it back to the amplifier cavity for additional, high-power amplification passes through the gain medium. In these power amplification passes, the beam diameter in gain medium is increased and carefully matched to the pump laser's beam diameter for high efficiency extraction of energy from the pumped gain medium. A method of “grooming” the beam by means of a far-field spatial filter in the process of changing the beam size within the single-stage amplifier is also described.
摘要翻译：本发明描述了在采用单级多通道放大的激光器中实现高峰值功率输出的技术。通过在增益介质中采用非常小的“种子”光束直径来实现高增益，并且通过泵浦增益介质保持多个高增益预放大通过的小光束直径，然后将光束导出放大器腔，改变光束直径并将其发送回放大器腔，用于额外的高功率放大，通过增益介质。在这些功率放大通路中，增益介质中的光束直径增加并仔细地匹配于泵激光器的光束直径，用于从泵浦增益介质中高效提取能量。还描述了在改变单级放大器内的光束尺寸的过程中借助于远场空间滤波器“修整”光束的方法。

5. 发明授权

US08228961B2 Temperature feedback control for long-term carrier-envelope phase locking 有权
标题翻译：温度反馈控制用于长期载波包络相位锁定
公开(公告)号：US08228961B2
公开(公告)日：2012-07-24
申请号：US13320226
申请日：2010-05-27
申请人： Zenghu Chang , Chenxia Yun , Shouyuan Chen , He Wang , Michael Chini
发明人： Zenghu Chang , Chenxia Yun , Shouyuan Chen , He Wang , Michael Chini
IPC分类号： H01S3/10 , H01S3/13 , H01S3/00
CPC分类号： H01S3/0057 , H01S3/0092 , H01S3/094076 , H01S3/1022 , H01S3/1028 , H01S3/1112 , H01S3/1305 , H01S3/1307 , H01S3/1625 , H01S3/1636
摘要： A feedback control module for stabilizing a carrier-envelope phase of an output of a laser oscillator system comprises a first photodetector, a second photodetector, a phase stabilizer, an optical modulator, and a thermal control element. The first photodetector may generate a first feedback signal corresponding to a first portion of a laser beam from an oscillator. The second photodetector may generate a second feedback signal corresponding to a second portion of the laser beam filtered by a low-pass filter. The phase stabilizer may divide the frequency of the first feedback signal by a factor and generate an error signal corresponding to the difference between the frequency-divided first feedback signal and the second feedback signal. The optical modulator may modulate the laser beam within the oscillator corresponding to the error signal. The thermal control unit may change the temperature of the oscillator corresponding to a signal operable to control the optical modulator.
摘要翻译：用于稳定激光振荡器系统的输出的载波包络相位的反馈控制模块包括第一光电检测器，第二光电检测器，相位稳定器，光调制器和热控制元件。第一光电检测器可以产生对应于来自振荡器的激光束的第一部分的第一反馈信号。第二光电检测器可以产生对应于由低通滤波器滤波的激光束的第二部分的第二反馈信号。相位稳定器可以将第一反馈信号的频率除以因子，并产生与分频的第一反馈信号和第二反馈信号之间的差相对应的误差信号。光调制器可以调制振荡器内对应于误差信号的激光束。热控制单元可以改变对应于可操作以控制光调制器的信号的振荡器的温度。

6. 发明申请

US20120057611A1 Temperature Feedback Control for Long-Term Carrier-Envelope Phase Locking 有权
标题翻译：长期载波包络相位锁定的温度反馈控制
公开(公告)号：US20120057611A1
公开(公告)日：2012-03-08
申请号：US13320226
申请日：2010-05-27
申请人： Zenghu Chang , Chenxia Yun , Shouyuan Chen , He Wang , Michael Chini
发明人： Zenghu Chang , Chenxia Yun , Shouyuan Chen , He Wang , Michael Chini
IPC分类号： H01S3/10
CPC分类号： H01S3/0057 , H01S3/0092 , H01S3/094076 , H01S3/1022 , H01S3/1028 , H01S3/1112 , H01S3/1305 , H01S3/1307 , H01S3/1625 , H01S3/1636
摘要： A feedback control module for stabilizing a carrier-envelope phase of an output of a laser oscillator system comprises a first photodetector, a second photodetector, a phase stabilizer, an optical modulator, and a thermal control element. The first photodetector may generate a first feedback signal corresponding to a first portion of a laser beam from an oscillator. The second photodetector may generate a second feedback signal corresponding to a second portion of the laser beam filtered by a low-pass filter. The phase stabilizer may divide the frequency of the first feedback signal by a factor and generate an error signal corresponding to the difference between the frequency-divided first feedback signal and the second feedback signal. The optical modulator may modulate the laser beam within the oscillator corresponding to the error signal. The thermal control unit may change the temperature of the oscillator corresponding to a signal operable to control the optical modulator.
摘要翻译：用于稳定激光振荡器系统的输出的载波包络相位的反馈控制模块包括第一光电检测器，第二光电检测器，相位稳定器，光调制器和热控制元件。第一光电检测器可以产生对应于来自振荡器的激光束的第一部分的第一反馈信号。第二光电检测器可以产生对应于由低通滤波器滤波的激光束的第二部分的第二反馈信号。相位稳定器可以将第一反馈信号的频率除以因子，并产生与分频的第一反馈信号和第二反馈信号之间的差相对应的误差信号。光调制器可以调制振荡器内对应于误差信号的激光束。热控制单元可以改变对应于可操作以控制光调制器的信号的振荡器的温度。

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