公开(公告)号：US07502395B2

公开(公告)日：2009-03-10

申请号：US11500661

申请日：2006-08-08

申请人： Eric Chiu-Tat Cheng ,  Robert Rex Rice ,  Michael Gordon Wickham ,  Mark Ernest Weber

发明人： Eric Chiu-Tat Cheng ,  Robert Rex Rice ,  Michael Gordon Wickham ,  Mark Ernest Weber

IPC分类号： G01B9/02 ,  H01S3/13

CPC分类号： H01S3/2383 ,  G01J9/00 ,  H01S3/0085 ,  H01S3/06754 ,  H01S3/09415 ,  H01S3/10015 ,  H01S3/10053

摘要： A pulsed coherent fiber array laser system that includes a beam generating sub-system that provides a signal pulse beam having pulses of the desired duration that is split into several fiber channels. Optical leakage between the pulses in each split beam is measured and locked to a reference beam by a phase sensing circuit and phase adjusters so that the phase of each fiber pulsed beam is aligned with the phase of the reference beam. A pulse clipper or filter is employed to remove the pulses in the fiber beams so that they do not saturate the phase sensing circuit. The beam generating sub-system can employ any suitable combination of devices to generate the signal beam and the reference beam, including continuous wave master oscillators, amplitude modulators, frequency shifters, injection seed oscillators, Q-switched lasers, reference oscillators, frequency lockers, wavelength division multiplexers, time gated switches, etc.

摘要翻译： 一种脉冲相干光纤阵列激光系统，其包括光束产生子系统，其提供具有被分割成若干光纤通道的期望持续时间的脉冲的信号脉冲光束。 通过相位检测电路和相位调整器测量每个分束中的脉冲之间的光学泄漏并将其锁定到参考光束，使得每个光纤脉冲光束的相位与参考光束的相位对准。 使用脉冲削波器或滤波器来去除光纤束中的脉冲，使得它们不会使相位感测电路饱和。 光束产生子系统可以采用任何合适的设备组合来产生信号光束和参考光束，包括连续波主振荡器，幅度调制器，移相器，注入种子振荡器，Q开关激光器，参考振荡器，频率锁存器， 波分复用器，时间门控开关等

公开(公告)号：US07218402B1

公开(公告)日：2007-05-15

申请号：US10727473

申请日：2003-12-04

申请人： Stephen John Brosnan ,  Mark Ernest Weber

发明人： Stephen John Brosnan ,  Mark Ernest Weber

IPC分类号： G01B11/02

CPC分类号： G01J9/04

摘要： A hybrid optical/electronic wavefront sensor includes an electro-acoustical device used to upshift an optical reference signal. An optical test signal and the frequency upshifted optical reference signal are optically heterodyned to create a signal having a frequency equivalent to the beat frequency of the two signals, for example, the RF driving frequency of the Bragg cell. The optically heterodyned signal is then converted by way of a detector to an electronic signal having the same phase as the optical test signal. The output of the detector is a sinusoidal signal having the same phase as the phase of the optical test signal. This signal is filtered by way of an AC filter and mixed with a second clock signal, for example, a clock signal that is offset in frequency from the electro-acoustical drive signal by a frequency, for example, between 100 kHz and 1 MHz. These two signals are mixed by way of a mixer. The low frequency product of the mixer is passed by way of a filter and converted to a square wave by way of a comparator. The output of the comparator is applied to a simple pulse counter and used to disable the pulse counter. The pulse counter counts the clock pulses while it is enabled and is linearly related to the difference in phase between the optical test signal and the frequency upshifted signal.

摘要翻译： 混合光学/电子波前传感器包括用于升高光学参考信号的电声装置。 光学测试信号和频率升高的光学参考信号被光学外差，以产生具有等于两个信号的拍频的频率的信号，例如布拉格单元的RF驱动频率。 光学外差信号然后通过检测器转换成具有与光学测试信号相同相位的电子信号。 检测器的输出是具有与光学测试信号的相位相同相位的正弦信号。 该信号通过AC滤波器进行滤波，并与第二时钟信号（例如，频率偏离电声驱动信号）频率例如在100kHz和1MHz之间的时钟信号混频。 这两个信号通过混合器混合。 混频器的低频乘积通过滤波器并通过比较器转换成方波。 比较器的输出应用于简单的脉冲计数器，用于禁止脉冲计数器。 脉冲计数器在使能时对时钟脉冲进行计数，并且与光学测试信号和频率升高信号之间的相位差线性相关。