公开(公告)号：US20060285119A1

公开(公告)日：2006-12-21

申请号：US11156103

申请日：2005-06-17

申请人： Joanne Law ,  Raymond Yeung ,  Eric Johnstone ,  Kerry Bagwell

发明人： Joanne Law ,  Raymond Yeung ,  Eric Johnstone ,  Kerry Bagwell

IPC分类号： G01B9/02

CPC分类号： G01B9/02003 ,  G01B2290/70

摘要： A polarization control system includes a light source that generates two light beams with different polarization states and optical frequencies. A polarization state modulator changes the polarization states of the two light beams. A first detector path generates a first beat signal from the two light beams passing through a first polarizer. A second detector path generates a second beat signal from the two light beams passing through a second polarizer that is oriented substantially orthogonal to the first polarizer. An amplitude detector generates an amplitude beat signal from the first and the second beat signals. The system then uses the amplitude beat signal to determine how to adjust the polarization state modulator in order to generate the first and the second light beams with the desired polarization states.

摘要翻译： 偏振控制系统包括产生具有不同偏振态和光频的两个光束的光源。 偏振状态调制器改变两个光束的偏振状态。 第一检测器路径从穿过第一偏振器的两个光束产生第一拍动信号。 第二检测器路径从穿过基本上正交于第一偏振器的第二偏振器的两个光束产生第二拍动信号。 振幅检测器从第一和第二拍频信号产生幅度差信号。 系统然后使用幅度差拍信号来确定如何调整偏振状态调制器，以便产生具有所需偏振态的第一和第二光束。

公开(公告)号：US20050185190A1

公开(公告)日：2005-08-25

申请号：US11099760

申请日：2005-04-05

申请人： Joanne Law ,  Kerry Bagwell ,  Eric Johnstone ,  Elizabeth Nevis

发明人： Joanne Law ,  Kerry Bagwell ,  Eric Johnstone ,  Elizabeth Nevis

IPC分类号： G02F1/03 ,  G01B9/02 ,  G01J1/26 ,  G01J3/52 ,  G02F1/11

CPC分类号： G01J1/26 ,  G01B9/02003 ,  G01B9/02007 ,  G01B2290/70 ,  G02F1/11

摘要： A polarization control system includes a beam source that generates a first beam component containing light with a first polarization and a first frequency and a second beam component containing light with a second polarization and a second frequency. A polarization state modulator adjusts the polarizations of the components for transmission on a single optical fiber. A detector system measures polarizations of the components when output from the optical fiber and determines how to adjust the polarization state modulator in order to give the first and the second components the desired output polarization states. The beam source can be implemented using a Zeeman-split laser, a laser containing a birefringent element, a pair of phase-locked lasers, and/or a variety of configurations of electro-optic or acousto-optic crystals operated to create or enhance the frequency difference between the beam components.

摘要翻译： 偏振控制系统包括产生包含具有第一偏振光和第一频率的光的第一光束分量和包含具有第二偏振光和第二频率的光的第二光束分量的光束源。 偏振状态调制器调节用于在单个光纤上传输的组件的极化。 当从光纤输出时，检测器系统测量元件的极化，并且确定如何调整偏振状态调制器以给出第一和第二分量所需的输出偏振状态。 光束源可以使用塞曼分割激光器，包含双折射元件的激光器，一对锁相激光器和/或电光或声光晶体的各种配置来实现，其操作以产生或增强 光束分量之间的频率差。

公开(公告)号：US20050031245A1

公开(公告)日：2005-02-10

申请号：US10637276

申请日：2003-08-08

申请人： Joanne Law ,  Eric Johnstone

发明人： Joanne Law ,  Eric Johnstone

IPC分类号： G01J4/00 ,  G02B6/34 ,  G02F1/01 ,  G02B6/00

CPC分类号： G02B6/274 ,  G01J4/00 ,  G02B6/2766 ,  G02F1/0136

摘要： A method for improving polarization extinction ratio includes changing a polarization state of a light beam, wherein the light beam thereafter includes spatially non-uniform polarization states, and spatially filtering the light beam to filter out the spatially non-uniform polarization states. Spatial filtering involves filtering a wavefront of the light beam by passing the light beam through a polarization-maintaining single-mode fiber, or filtering an amplitude of the light beam by passing the light beam through an aperture.

摘要翻译： 提高偏振消光比的方法包括改变光束的偏振状态，其中光束此后包括空间上不均匀的偏振状态，并且对光束进行空间滤波以滤除空间上不均匀的偏振状态。 空间滤波包括通过使光束通过偏振保持单模光纤来对光束的波前进行滤波，或通过使光束通过光圈来滤波光束的幅度。

公开(公告)号：US20050078317A1

公开(公告)日：2005-04-14

申请号：US10685325

申请日：2003-10-14

申请人： Joanne Law ,  Douglas Baney

发明人： Joanne Law ,  Douglas Baney

IPC分类号： H04B10/08 ,  G01J9/04 ,  H04B10/148 ,  H04J14/00 ,  H04J14/02 ,  G01B9/02

CPC分类号： H04B10/61 ,  G01J9/04 ,  H04B10/64

摘要： Ensuring that a tunable device, such as a tunable optical filter, accurately tracks the wavelength of a local oscillator signal involves generating at least one synchronization signal as the local oscillator signal is swept across a range of wavelengths and adjusting an operating characteristic of the tunable device in response to the at least one synchronization signal. Before the local oscillator signal is swept across the range of wavelengths, the operating characteristic of the tunable device and the wavelength of the local oscillator signal are initially set to matching values.

摘要翻译： 确保诸如可调谐光学滤波器的可调谐器件精确地跟踪本地振荡器信号的波长涉及当本地振荡器信号扫过波长范围并调整可调谐器件的工作特性时产生至少一个同步信号 响应于所述至少一个同步信号。 在本地振荡器信号扫过波长范围之前，可调谐器件的工作特性和本地振荡器信号的波长初始设置为匹配值。