公开(公告)号：US07239771B2

公开(公告)日：2007-07-03

申请号：US11235618

申请日：2005-09-26

申请人： Kamyar Ghandi ,  Nesbitt Ward Hagood, IV ,  Timothy Scott Glenn

发明人： Kamyar Ghandi ,  Nesbitt Ward Hagood, IV ,  Timothy Scott Glenn

IPC分类号： G02B6/26

CPC分类号： G02B6/3502 ,  G02B6/3556 ,  G02B6/3558 ,  G02B6/3578 ,  G02B6/359 ,  H04Q11/0005 ,  H04Q2011/003 ,  H04Q2011/0039 ,  H04Q2011/0049

摘要： A free space optical switch that uses both an open loop control mode and a closed loop control mode. The open loop control mode is used to transition to a state where at least some light is sensed at a destination port. A closed loop control mode is then used, whereby a series of controlled dither signals are adjusted for system dynamics. Modifying the dither signals in this matter allows moving actuators at a rate that is much closer to the natural frequency of the underlying system, and hence speeds up the system convergence process. Variable modulation amplitudes may be employed on the dither signals to maximize convergence speed. In particular, changes in the dither signal can be made in accordance with the change in amplitude as a function of a gradient along a parabola that models the optical system response. According to still further aspects, the dither signals may be compensated for a desired and selectable attenuation level of output optical power.

摘要翻译： 一种使用开环控制模式和闭环控制模式的自由空间光开关。 开环控制模式用于转换到在目的地端口处感测至少一些光的状态。 然后使用闭环控制模式，由此针对系统动态调整一系列受控抖动信号。 在此事项中修改抖动信号允许以更接近底层系统固有频率的速度移动执行器，从而加快系统收敛过程。 可以在抖动信号上采用可变调制幅度来最大化收敛速度。 特别地，抖动信号的变化可以根据作为对抛物线的梯度的函数的幅度变化进行，该抛物线对光学系统响应进行建模。 根据另外的方面，抖动信号可被补偿输出光功率的期望和可选择的衰减水平。

公开(公告)号：US06975785B2

公开(公告)日：2005-12-13

申请号：US10392371

申请日：2003-03-18

申请人： Kamyar Ghandi ,  Nesbitt Ward Hagood, IV ,  Timothy Scott Glenn

发明人： Kamyar Ghandi ,  Nesbitt Ward Hagood, IV ,  Timothy Scott Glenn

IPC分类号： G02B6/35 ,  H04Q11/00 ,  G02B6/32

CPC分类号： G02B6/3502 ,  G02B6/3556 ,  G02B6/3558 ,  G02B6/3578 ,  G02B6/359 ,  H04Q11/0005 ,  H04Q2011/003 ,  H04Q2011/0039 ,  H04Q2011/0049

摘要： A free space optical switch that uses both an open loop control mode and a closed loop control mode. The open loop control mode is used to transition to a state where at least some light is sensed at a destination port. A closed loop control mode is then used, whereby a series of controlled dither signals are adjusted for system dynamics. Modifying the dither signals in this matter allows moving actuators at a rate that is much closer to the natural frequency of the underlying system, and hence speeds up the system convergence process. Variable modulation amplitudes may be employed on the dither signals to maximize convergence speed. In particular, changes in the dither signal can be made in accordance with the change in amplitude as a function of a gradient along a parabola that models the optical system response. According to still further aspects, the dither signals may be compensated for a desired and selectable attenuation level of output optical power.

摘要翻译： 一种使用开环控制模式和闭环控制模式的自由空间光开关。 开环控制模式用于转换到在目的地端口处感测至少一些光的状态。 然后使用闭环控制模式，由此针对系统动态调整一系列受控抖动信号。 在此事项中修改抖动信号允许以更接近底层系统固有频率的速度移动执行器，从而加快系统收敛过程。 可以在抖动信号上采用可变调制幅度来最大化收敛速度。 特别地，抖动信号的变化可以根据作为对抛物线的梯度的函数的幅度变化进行，该抛物线对光学系统响应进行建模。 根据另外的方面，抖动信号可被补偿输出光功率的期望和可选择的衰减水平。