公开(公告)号：US06337991B1

公开(公告)日：2002-01-08

申请号：US08964520

申请日：1997-11-05

Applicant: Yi-Qun Li ,  Jing Zhao

Inventor： Yi-Qun Li ,  Jing Zhao

IPC: G01B700

CPC classification number: H01L31/101 ,  C30B23/02 ,  C30B25/02 ,  C30B25/18 ,  C30B29/22 ,  C30B29/225 ,  G01J5/20 ,  H01L31/03046 ,  H01L37/00 ,  Y02E10/544

Abstract: Oxide thin films having a perovskite-like structure and undergoing a ferromagnetic phase transition with large temperature coefficients of resistance (TCRs) are disclosed. These can be useful materials for making thermistors, bolometers, infrared detectors and the like. These can be fabricated with a number of methods, preferably including metal oxide chemical vapor deposition, laser ablation and sputtering. In one embodiment, the oxides are based on a LaMnO3 with substitutions of Ca, Sr, Ba, Mn, and Pb for some of the La. The amounts can be varied to maximize the TCR or shift the temperature at which the maximum occurs. Methods of making such thin films are disclosed. In one embodiment, the high sensitivity films can be used in an array of micro-bolometers in an infrared camera.

Abstract translation: 公开了具有钙钛矿结构并经历具有大的温度系数电阻（TCR）的铁磁相变的氧化物薄膜。 这些可以是用于制造热敏电阻，辐射热计，红外探测器等的有用材料。 这些可以用多种方法制造，优选包括金属氧化物化学气相沉积，激光烧蚀和溅射。 在一个实施方案中，氧化物基于LaMnO 3，LaMnO 3中的一些La取代了Ca，Sr，Ba，Mn和Pb，可以改变量以使TCR最大化或者使发生最大值的温度发生变化。 公开了制造这种薄膜的方法。 在一个实施例中，高灵敏度膜可以用于红外照相机中的微辐射计的阵列中。

公开(公告)号：US06330097B1

公开(公告)日：2001-12-11

申请号：US09288439

申请日：1999-04-08

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: G02B2600

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：US6137619A

公开(公告)日：2000-10-24

申请号：US158224

申请日：1998-09-22

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

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

IPC: G02F1/055 ,  G02F1/03

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.