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1. 发明授权

US06667995B2 ultrashort pulse laser oscillator 失效
标题翻译：超短脉冲激光振荡器
公开(公告)号：US06667995B2
公开(公告)日：2003-12-23
申请号：US09794137
申请日：2001-02-28
申请人： Jihong Geng , Satoshi Wada , Hideo Tashiro
发明人： Jihong Geng , Satoshi Wada , Hideo Tashiro
IPC分类号： H01S3117
CPC分类号： H01S3/1112 , H01S3/0816 , H01S3/094038 , H01S3/0943 , H01S3/1068
摘要： For the sake of no needing to provide a mechanically actuating section such as a rotating mechanism thereby to be capable of realizing stable ultrashort pulse laser oscillation, an ultrashort pulse laser oscillator comprises a laser resonator composed of a mirror on outgoing side, and a total reflection mirror; a continuous wave oscillation laser for inputting excitation laser beam; a tunable laser medium capable of laser oscillation; a photoacoustic optical crystal having birefringent property as a crystal for selecting wavelength to which is input outgoing light from the tunable laser medium; a piezoelectric element inputting an acoustic wave having a frequency in response to a distortion upon application of voltage; a power source for applying the voltage; and a control means for controlling a frequency of voltage to be applied to the piezoelectric element by the power source wherein a frequency of voltage to be applied to the piezoelectric element by the power source is controlled by means of the control means, whereby the voltage having a frequency conforming to a distance defined between the mirror on outgoing side and the total reflection mirror is applied to the piezoelectric element by means of the power source, besides laser beam output from the mirror on outgoing side is utilized as outgoing laser beam from the laser resonator.
摘要翻译：为了不需要提供诸如旋转机构的机械致动部分，从而能够实现稳定的超短脉冲激光振荡，超短脉冲激光振荡器包括由出射侧的反射镜和全反射镜子; 用于输入激发激光束的连续波振荡激光器; 可激光振荡的可调激光介质; 具有双折射性的光声光学晶体作为用于选择从可调激光介质输入出射光的波长的晶体; 输入响应于施加电压时的失真而具有频率的声波的压电元件; 用于施加电压的电源; 以及控制装置，用于控制通过电源施加到压电元件的电压的频率，其中通过控制装置控制由电源施加到压电元件的电压的频率，由此电压具有通过电源将符合出射侧的反射镜和全反射镜之间的距离的频率施加到压电元件，除了从出射侧的反射镜输出的激光束被用作来自激光器的输出激光束谐振器。

2. 发明授权

US06618404B2 Method for producing highly accurate frequency and FM of a laser 有权
公开(公告)号：US06618404B2
公开(公告)日：2003-09-09
申请号：US09883246
申请日：2001-06-19
申请人： Barry G. Mattox
发明人： Barry G. Mattox
IPC分类号： H01S3117
CPC分类号： H01S3/105 , H01S3/1305 , H01S3/1394 , H01S3/1398
摘要： A method and apparatus for accurately and precisely controlling the frequency (wavelength) and periodic frequency modulation of a laser are provided. An ADC (Analog to Digital Converter) is used to sample the output of a modified interferometer used as a delay line discriminator, and quadrature components of the sampled output are generated. An arctangent function (e.g., atan2) is applied to convert the quadrature components to a phase measure that is proportional to the laser frequency. Correlator circuits (e.g., cost-efficient correlator circuits) are provided to extract average frequency, modulation peak deviation, and modulation phase error signals. Control-loop feedback using the extracted signals is used to adjust the average frequency, modulation deviation, and modulation phase to respective set points.

3. 发明授权

US06563844B1 High loss modulation acousto-optic Q-switch for high power multimode laser 有权
标题翻译：高功率多模激光器的高损耗调制声光Q开关
公开(公告)号：US06563844B1
公开(公告)日：2003-05-13
申请号：US09368665
申请日：1999-08-05
申请人： Eddie H. Young , Robert V. Belfatto, Sr. , Carlos M. Carbonell
发明人： Eddie H. Young , Robert V. Belfatto, Sr. , Carlos M. Carbonell
IPC分类号： H01S3117
CPC分类号： H01S3/117 , H01S3/04 , H01S3/127
摘要： A Q-switch modulator for a high power laser having a randomly polarized output beam and large divergence angle employs a cascaded arrangement of longitudinal mode acousto-optic modulators, each of which has a Raman Nath or near Raman Nath interaction length. The modulators are optically cascaded such that the distance the randomly polarized laser beam travels through the modulators is effectively confined to the sum of the non coherent interaction lengths thereof. Due to the substantial power level of the laser output, there is heating of the bulk material, which usually results in a shift in the Bragg angle. This has minimal if any effect on the shorter interaction length of the Q-switch modulator of the invention. Also, heating of the bulk material is countered by the incorporation of cooling fluid channels in a heat sink support block coupled in thermal communication with the bulk material. The heat sink support structure is configured to be effectively mechanically floating with respect to a support housing for the Q-switch.
摘要翻译：具有随机偏振输出光束和大发散角的大功率激光器的Q开关调制器采用纵向模式声光调制器的级联布置，其中每个具有拉曼Nath或接近拉曼Nath相互作用长度。调制器被光学级联，使得随机偏振的激光束穿过调制器的距离被有效地限制在其非相干相互作用长度的和之间。由于激光输出的实质功率水平，散装材料的加热，这通常导致布拉格角的偏移。如果对本发明的Q开关调制器的较短的相互作用长度有任何影响，这是最小的。此外，通过将冷却流体通道并入与散装材料热连通的散热器支撑块中来抵消散装材料的加热。散热器支撑结构被配置为相对于用于Q开关的支撑壳体有效地机械地浮动。

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