公开(公告)号：US5448579A

公开(公告)日：1995-09-05

申请号：US164336

申请日：1993-12-09

申请人： Kok W. Chang ,  David K. Donald ,  Hong Lin

发明人： Kok W. Chang ,  David K. Donald ,  Hong Lin

IPC分类号： H01S3/098 ,  H01S3/06 ,  H01S3/067 ,  H01S3/101 ,  H01S3/16 ,  H01S3/17 ,  H01S3/07 ,  H01S3/106

CPC分类号： H01S3/067 ,  H01S3/06712 ,  H01S3/1112 ,  H01S3/1115 ,  H01S3/1608

摘要： A polarization insensitive fiber laser. A pair of 45 degree Faraday rotators are positioned on either end of the fiber gain source. The resulting laser is insensitive to external perturbations with respect to known entrance and exit polarization states of the laser light. Modelocking, both passive and active, is possible. Configuration wherein the fiber is a combination of polarization preserving and Erbium-doped, and a saturable absorber is included provide a self-starting, polarization insensitive modelocked laser.

摘要翻译： 极化不敏感光纤激光器。 一对45度法拉第旋转器位于光纤增益源的任一端。 所得到的激光对于激光的已知入射和出射极化状态对外部扰动不敏感。 模式锁定，被动和主动都是可能的。 配置其中光纤是偏振保持和铒掺杂的组合，并且包括可饱和吸收体提供自启动偏振不敏感锁模激光器。

公开(公告)号：US5446578A

公开(公告)日：1995-08-29

申请号：US327945

申请日：1989-03-23

申请人： Kok W. Chang ,  Wayne Sorin

发明人： Kok W. Chang ,  Wayne Sorin

IPC分类号： G02B27/28 ,  G02B6/26 ,  G02F1/09 ,  G02B5/30

CPC分类号： G02B6/2746 ,  G02F1/093 ,  G02F2203/04 ,  G02F2203/06 ,  Y10S372/703

摘要： At least one non-reciprocal rotation element is interposed between two adjacent walk off crystal members to form an optical isolator. Light in the forward direction is separated into two rays of linear polarizations where there is substantially no optical path length difference between the two rays. Light transmitted in the reverse direction is reduced. A conventional optical isolator which does not preserve optical path length difference is converted into one which does by adding a birefringent plate to compensate for the optical path length difference introduced by the conventional isolator. A pair of collimating lenses may be introduced between any pair of non-reciprocal rotation elements.

摘要翻译： 在两个相邻的脱落晶体构件之间插入至少一个不可逆旋转元件以形成光隔离器。 沿向前方向的光被分成两束线性偏振光，其中两条光线之间基本上没有光程差。 沿相反方向传输的光减少。 不保留光路长度差的常规光隔离器被转换成通过添加双折射板来补偿由常规隔离器引入的光程长度差异的光隔离器。 一对准直透镜可以被引入任何一对不可逆旋转元件之间。

公开(公告)号：US4751480A

公开(公告)日：1988-06-14

申请号：US931276

申请日：1986-11-14

申请人： William E. Kunz ,  Kok W. Chang ,  Waguih S. Ishak

发明人： William E. Kunz ,  Kok W. Chang ,  Waguih S. Ishak

IPC分类号： H01P7/00 ,  H03H2/00 ,  H03B7/12

CPC分类号： H03H2/001

摘要： An overcoupled resonator having a resonant cavity defined by a thin film of magnetic material with a pair of end walls parallel to a transducer. Because this resonator is overcoupled, it is suitable for use in a broadband oscillator.

摘要翻译： 具有谐振腔的过耦合谐振器，其由磁性材料的薄膜限定，其一对端壁平行于换能器。 因为这个谐振器是过耦合的，所以它适用于宽带振荡器。

公开(公告)号：US4777462A

公开(公告)日：1988-10-11

申请号：US94959

申请日：1987-09-09

申请人： William E. Kunz ,  Kok W. Chang ,  Giuseppe Miccoli

发明人： William E. Kunz ,  Kok W. Chang ,  Giuseppe Miccoli

IPC分类号： H01P1/215 ,  H01P7/00 ,  H01P9/00 ,  H03H2/00 ,  H03H3/08 ,  H03H9/25 ,  H01P1/20

CPC分类号： H03H2/001

摘要： A magnetostatic wave structure in which magnetostatic wave signals are coupled between discrete magnetostatic wave elements without the use of microstrip transducers. This structure consists of a plurality of blocks of ferrimagnetic material in which each block has an edge close enough to an edge of another block that a magnetostatic wave in the first of these blocks couples across the gap between these two edges into the second of these blocks. Linear and nonlinear configurations are presented that include a band pass filter.

公开(公告)号：US4652338A

公开(公告)日：1987-03-24

申请号：US840846

申请日：1986-03-18

申请人： Waguih Ishak ,  Kok W. Chang

发明人： Waguih Ishak ,  Kok W. Chang

IPC分类号： H01P11/00 ,  H01F41/34 ,  H01P1/215 ,  H03H2/00 ,  C23F1/02 ,  B44C1/22 ,  C03C15/00

CPC分类号： H03H2/001 ,  H01F41/34

摘要： In a batch process of manufacturing magnetostatic resonators, photolithographically etching a ferrimagnetic layer, that has been deposited on a dielectric substrate, to produce a plurality of disjoint blocks of ferrimagnetic material. Each block has a pair of sides that are substantially parallel for use in reflecting magnetostatic waves to form a resonator. A conductive layer is deposited on the wafer and then this layer is photolithographically etched to form a transducer adjacent to each of these reflecting sides.

摘要翻译： 在制造静磁共振器的批处理中，光刻地蚀刻已经沉积在电介质基底上的铁氧体层，以产生多个不相交的亚铁磁性材料块。 每个块具有基本上平行的一对侧面，用于反射静磁波以形成谐振器。 导电层沉积在晶片上，然后将该层光刻蚀刻以形成与这些反射侧中的每一个相邻的换能器。

公开(公告)号：US4974944A

公开(公告)日：1990-12-04

申请号：US222597

申请日：1988-07-21

申请人： Kok W. Chang

发明人： Kok W. Chang

IPC分类号： G02B27/28 ,  G02B6/26 ,  G02F1/09

CPC分类号： G02B6/2746 ,  G02F1/093 ,  G02F2203/04 ,  G02F2203/06 ,  Y10S372/703

摘要： An optical non-reciprocal device is disclosed for passing light in the forward direction and for reducing light passing in the reverse direction. Three anisotropic crystal members are arranged in a linear array. Each member has a walk off direction for separating light into ordinary and extraordinary rays. At least one non-reversible rotation element is interposed between every two adjacent anisotropic crystal members. Rotations of the elements and the orientations and thicknesses of the anisotropic crystal members are such that light in the forward direction is separated into ordinary and extraordinary rays which substantially do not superpose each other upon emerging from the device so that light passing in the reverse direction is reduced in a manner which is substantially insensitive to temperature and wavelengths of the light passing in either direction.