公开(公告)号：US06522456B2

公开(公告)日：2003-02-18

申请号：US09848766

申请日：2001-05-04

Applicant: Qiushui Chen ,  Hua Jiang ,  Yingyin Zou ,  Dean Tsang ,  Paul Melman ,  Feiling Wang ,  Guanghai Jin ,  Jing Zhao

Inventor： Qiushui Chen ,  Hua Jiang ,  Yingyin Zou ,  Dean Tsang ,  Paul Melman ,  Feiling Wang ,  Guanghai Jin ,  Jing Zhao

IPC: G02F100

CPC classification number: G02F1/21 ,  G02F2001/212 ,  G02F2202/40 ,  G02F2203/055 ,  G02F2203/48

Abstract: An apparatus and method for filtering an optical input is disclosed. In an illustrative embodiment, an optical input is split into polarization components along separate paths. The polarization components are then fed into a first electro-optic device that includes a set of electrodes across which a voltage is applied to adjust a wavelength transmission characteristic of the device. A section of the first device positioned between the electrodes preferably has a birefringence that is adjusted depending on the voltage applied across the electrodes. The adjusted components of the optical input are thereafter combined to produce an optical output. Accordingly, the optical input can be attenuated based on the voltage applied to electrodes of the first electro-optic device.

公开(公告)号：US06411422B1

公开(公告)日：2002-06-25

申请号：US09798136

申请日：2001-03-02

Applicant: Feiling Wang ,  Gene H. Haertling

Inventor： Feiling Wang ,  Gene H. Haertling

IPC: G02F107

Abstract: A solid state device used to modulate the intensity of reflected or transmitted light by modulating with an external voltage the optical thickness of a thin film ferroelectric placed in an etalon cavity is disclosed. The device is constructed by selecting a generally planar supporting substrate, preferably silicon or sapphire in order to be compatible with silicon integrated circuits. A dielectric stack consisting of alternating layers of different index of refraction materials, also specifically selected to be compatible with later growth of the thin film ferroelectric, is deposited thereon to form a partially reflective and partially transmitting mirror, followed by a transparent electrically conductive layer. The thin film ferroelectric is deposited on the conductive layer, followed by a second transparent conductive layer and a second dielectric stack. Leads are connected to the conductive layers and in turn to a voltage generator. In one version of the invention, the functions of both the second (top) electrically conductive layer and dielectric stack are fulfilled by using a semi-transparent conducting film. In another version, the functions of both the first (bottom) electrically conductive layer and dielectric stack are also fulfilled by using a, preferably, highly reflective conducting film.

公开(公告)号：US06404538B1

公开(公告)日：2002-06-11

申请号：US09695538

申请日：2000-10-24

Applicant: Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao ,  Dean Tsang ,  Feiling Wang

Inventor： Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao ,  Dean Tsang ,  Feiling Wang

IPC: G02F100

CPC classification number: G02F1/055 ,  G02F1/0555 ,  G02F1/0556 ,  G02F2201/17 ,  G02F2203/06 ,  G02F2203/48

Abstract: An optical modulator is provided to control the intensity of a transmitted or reflected light. In a transmission mode, a separator splits arbitrarily polarized light into two polarization rays and one is made to travel a separate path from the other. A recombiner causes the two rays to recombine at an output unless an electro-optic phase retarder changes the polarization of the two rays, in which case, both of them miss the output by an amount which is a function of the voltage on the retarder. A normally-off version with low polarization mode dispersion is obtained by changing the orientation of the recombiner. A normally-on version with low polarization mode dispersion is obtained with a passive polarization direction rotator. Similar results can be obtained in a reflection mode where the input and output are on the same side of the modulator. Versions using a GRIN lens are particularly suited to modulation of light out of and back into fiber-optic cables. The device can be operated as a variable optical attenuator, an optical switch, or a high speed modulator and is insensitive to polarization of the input light. A preferred material for the phase retarder is a hot-pressed ceramic lead lanthanum zirconate titanate composition.

Abstract translation: 提供光调制器以控制透射或反射光的强度。 在透射模式中，分离器将任意偏振光分离成两个偏振光，一个偏振光从另一个行进。 重组器会导致两条射线在输出端重新组合，除非电光相位延迟器改变两个射线的极化，在这种情况下，它们都将输出误差减去延迟器上的电压的函数。 通过改变重组器的取向，获得具有低偏振模色散的常关型。 使用无源偏振方向旋转器获得具有低偏振模色散的常导版本。 在输入和输出位于调制器的同一侧的反射模式下可以获得类似的结果。 使用GRIN镜头的版本特别适用于调制光纤到光纤的光纤。 该器件可以作为可变光衰减器，光开关或高速调制器操作，并且对输入光的偏振不敏感。 用于相缓凝剂的优选材料是热压陶瓷铅锆酸镧锆酸盐组合物。

公开(公告)号：US06373620B1

公开(公告)日：2002-04-16

申请号：US09362209

申请日：1999-07-28

Applicant: Feiling Wang

Inventor： Feiling Wang

IPC: G02F129

CPC classification number: G02F1/292 ,  G02F2001/213

Abstract: A light beam deflector comprising a modified asymmetric Fabry-Perot (Gires-Tournois) etalon having a back reflecting and electrically conducting mirror and a front partially transmitting mirror spaced apart by an electro-optic material, there also being a transparent sheet resistor between the electro-optic material and the front mirror. The invention further comprises a pair of electrodes contacting two generally parallel edges of the transparent sheet resistor so that if different voltages are applied between the electrodes with respect to the back conducting mirror, a front to back electric field which varies in a linear manner from one electrode to the other will be produced. By utilizing an electro-optic material with either a linear longitudinal electro-optic effect or one having a linearized quadratic electro-optic effect, a linear variation of refractive index in the material will be produced between the electrodes, further resulting in a linear phase shift across a light beam impinging on the front and undergoing multiple reflections inside the electro-optic material and still further resulting in an overall deflection of the reflected beam.

Abstract translation: 一种光束偏转器，包括具有背反射和导电反射镜的修改的不对称法布里 - 珀罗（Gires-Tournois）标准具和由电光材料隔开的前部部分透射镜，在电极之间还具有透明片状电阻器 - 光学材料和前视镜。 本发明还包括一对电极，其接触透明薄片电阻器的两个大致平行的边缘，使得如果在电极之间相对于后导电反射镜施加不同的电压，则以从线性方式与一个线性方式变化的前后电场 将生产电极到另一个。 通过利用具有线性纵向电光效应的电光材料或具有线性二次电光效应的电光材料，将在电极之间产生材料中折射率的线性变化，进一步导致线性相移 穿过照射在前面的光束并且在电光材料内部经历多次反射，并且还进一步导致反射光束的整体偏转。