公开(公告)号：US06625354B2

公开(公告)日：2003-09-23

申请号：US09740370

申请日：2000-12-19

申请人： Jack H. Hollister ,  Robert R. Rice ,  Neil F. Ruggieri

发明人： Jack H. Hollister ,  Robert R. Rice ,  Neil F. Ruggieri

IPC分类号： G02B643

CPC分类号： H01S3/094003 ,  G02B6/2852 ,  H01S3/06708 ,  H01S3/094019

摘要： An optical fiber amplifier employing a prism to optimally couple pump energy into the pump core of a dual clad fiber. The optical fiber amplifier consists of a dual clad fiber having an inner (e.g., signal) core, an outer (e.g., pump) core surrounding the inner core, and a cladding layer at least partially surrounding the outer core. Pump energy can be injected into the outer core through the prism located adjacent to the outer core in order to amplify signals propagating through the inner core.

公开(公告)号：US5847817A

公开(公告)日：1998-12-08

申请号：US783009

申请日：1997-01-14

申请人： Mark S. Zediker ,  Robert R. Rice ,  Jack H. Hollister

发明人： Mark S. Zediker ,  Robert R. Rice ,  Jack H. Hollister

IPC分类号： G01S7/493 ,  G01S17/32 ,  G01S17/58 ,  H01S3/00

CPC分类号： G01S17/58 ,  G01S17/32 ,  G01S7/4911 ,  G01S7/4917 ,  G01S7/493 ,  G01S7/497

摘要： A method for compensating a reference signal used in a coherent receiver of a micro-doppler sensor having a transmitter includes the steps for: (a) repeatedly measuring phase differences between a signal emitted by the transmitter a first time and a previous signal emitted at a previous time so as to produce a plurality of phase error signals; (b) accumulating the phase error signals over a propagation time between the transmitter and the coherent receiver so as to produce a cumulative phase error signal; and (c) modulating a signal produced by the transmitter at the end of the propagation period so as to generate a compensated reference signal having a phase characteristic substantially identical to the signal produced by the transmitter at the beginning of the propagation period. A phase error or noise compensator, which can form part of a micro-doppler ladar system, is also described.

摘要翻译： 一种用于补偿在具有发射机的微多普勒传感器的相干接收机中使用的参考信号的方法，包括以下步骤：（a）重复地测量由发射机发射的信号第一次与先前发射的信号之间的相位差 以产生多个相位误差信号; （b）在发射机和相干接收机之间的传播时间累积相位误差信号，以产生累积相位误差信号; 以及（c）在传播周期结束时调制由发射机产生的信号，以产生具有与传播周期开始时由发射机产生的信号基本相同的相位特性的补偿参考信号。 还描述了可以形成微多普勒系统的一部分的相位误差或噪声补偿器。

公开(公告)号：US06597836B2

公开(公告)日：2003-07-22

申请号：US09885670

申请日：2001-06-20

申请人： Bartley C. Johnson ,  Jack H. Hollister

发明人： Bartley C. Johnson ,  Jack H. Hollister

IPC分类号： G02B632

CPC分类号： G02B27/108 ,  G02B27/0087 ,  G02B27/144 ,  H01S5/4025 ,  H01S5/4075

摘要： A real-time control system for an optical phased array is disclosed that comprises a computationally efficient algorithm for calculating phase differences between a plurality of array beamlets and a reference plane wave and further generates phase correction signals that are transmitted to a plurality of phase modulators to realign the array beamlets to compensate for external perturbations and atmospheric aberrations. The phase measurements are based on a phase angle of a complex number comprising square wave functions, and alternately, based on a phase angle of a complex number comprising sine and cosine functions to correct for harmonic content of phase measurements. Furthermore, the phase correction signal is based on the phase measurement times modulo2&pgr;.

公开(公告)号：US5832163A

公开(公告)日：1998-11-03

申请号：US896624

申请日：1997-07-18

申请人： Jack H. Hollister

发明人： Jack H. Hollister

IPC分类号： G02B6/02 ,  H01S3/067

CPC分类号： H01S3/06708 ,  G02B6/02

摘要： A single mode optical waveguide includes a first region having a relatively high refractive index, a second region having a relatively low refractive index disposed adjacent to the first region, and a dopant region overlapping the first and second regions. Preferably, the first and second regions are circular regions which are concentric with respect to one another. Moreover, the dopant material in the dopant region advantageously can have a non-uniform dopant gradient. In addition, a predetermined percentage of dopant material defining the dopant region is disposed coincident with the second region. Preferably, the predetermined percentage is greater than or equal to 10 percent and, most preferably, the predetermined percentage is greater than or equal to 50 percent. Alternatively, the first region corresponds to an inner core of a dual core optical fiber, while the second region corresponds to an outer core of the dual core optical fiber.

摘要翻译： 单模光波导包括具有相对较高折射率的第一区域，与第一区域邻近设置的具有相对较低折射率的第二区域以及与第一区域和第二区域重叠的掺杂区域。 优选地，第一和第二区域是相对于彼此同心的圆形区域。 此外，掺杂剂区域中的掺杂剂材料有利地可以具有不均匀的掺杂剂梯度。 此外，限定掺杂剂区域的预定百分比的掺杂剂材料被设置为与第二区域一致。 优选地，预定百分比大于或等于10％，最优选地，预定百分比大于或等于50％。 或者，第一区域对应于双芯光纤的内芯，而第二区域对应于双芯光纤的外芯。