公开(公告)号：US06795147B1

公开(公告)日：2004-09-21

申请号：US09483702

申请日：2000-01-14

Applicant: Gary K. Starkweather

Inventor： Gary K. Starkweather

IPC: G02F11335

CPC classification number: G02F1/133553 ,  G02F2201/17

Abstract: A transmissive display system with a controllable display cell, such as a liquid crystal display cell, includes a pair of generally non-absorptive, high reflectance, low transmittance optical layers positioned opposite each other across the cell to provide improved image contrast. In one implementation, non-absorptive, high reflectance, low transmittance optical layers may be formed by dielectric coatings on inner surfaces of generally transmissive plates facing the display cell.

Abstract translation: 具有诸如液晶显示单元的可控显示单元的透射显示系统包括一对通常在单元上相对定位的大体上不吸收的高反射率低透光率光学层，以提供改善的图像对比度。 在一个实施方案中，可以通过面向显示单元的通常透射板的内表面上的电介质涂层形成非吸收性，高反射率，低透光率的光学层。

公开(公告)号：US06775054B1

公开(公告)日：2004-08-10

申请号：US10217853

申请日：2002-08-12

Applicant: Arlee V. Smith ,  Darrell J. Armstrong

Inventor： Arlee V. Smith ,  Darrell J. Armstrong

IPC: G02F139

CPC classification number: G02F1/39 ,  G02F2201/17 ,  G02F2203/15

Abstract: A device for optical parametric amplification utilizing four mirrors oriented in a nonplanar configuration where the optical plane formed by two of the mirrors is orthogonal to the optical plane formed by the other two mirrors and with the ratio of lengths of the laser beam paths approximately constant regardless of the scale of the device. With a cavity length of less than approximately 110 mm, a conversion efficiency of greater than 45% can be achieved.

Abstract translation: 一种用于光学参量放大的装置，其利用以非平面构造取向的四个反射镜，其中由两个反射镜形成的光学平面与由另外两个反射镜形成的光学平面正交，并且激光束路径的长度比率几乎不变 的设备规模。 在腔长度小于约110mm的情况下，可以实现大于45％的转换效率。

公开(公告)号：US20040120683A1

公开(公告)日：2004-06-24

申请号：US10657743

申请日：2003-09-05

Applicant: Xtellus, Inc.

Inventor： Gil Cohen

IPC: G02B006/00 ,  G02F001/035

CPC classification number: G02F1/1326 ,  G02B6/266 ,  G02F1/0115 ,  G02F1/134309 ,  G02F1/1396 ,  G02F1/2955 ,  G02F2201/04 ,  G02F2201/17 ,  G02F2203/48

Abstract: A fiber optical attenuator utilizing the cut-off phenomenon for single mode propagation of an optical wave down a single mode fiber, comprising an element such as a pixelated liquid crystal element, capable of spatially changing the phase across the cross section of an input optical signal. Such a spatial phase change is equivalent to a change in the mode structure of the propagating wave. The signal propagating in the single mode output fiber is attenuated in accordance with the extent to which higher order modes are mixed into the low order mode originally present. When the mode is completely transformed to higher order modes, the wave is effectively completely blocked from entering the output single-mode fiber, and the attenuation is high. The level of attenuation is determined by the fraction of the wave which is converted to modes other than the lowest order mode, and is thus controllable by the voltage applied to the pixels of the liquid crystal element.

Abstract translation: 一种光纤衰减器，其利用用于单模光纤单模传播的截止现象的光纤衰减器，其包括诸如像素化液晶元件的元件，其能够在输入光信号的横截面上空间改变相位 。 这样的空间相位变化相当于传播波的模式结构的变化。 在单模输出光纤中传播的信号根据最初存在的低阶模式混合到高阶模式的程度而衰减。 当模式完全转换为高阶模式时，波被有效完全阻止进入输出单模光纤，衰减高。 衰减的水平由转换成除了最低阶模式之外的模式的波的分数确定，并且因此可以通过施加到液晶元件的像素的电压来控制。

公开(公告)号：US06678092B2

公开(公告)日：2004-01-13

申请号：US10123230

申请日：2002-04-17

Applicant: Takeshi Matsushita ,  Mitsuteru Inoue ,  Hideki Kato ,  Akio Takayama

Inventor： Takeshi Matsushita ,  Mitsuteru Inoue ,  Hideki Kato ,  Akio Takayama

IPC: G02B2728

CPC classification number: G02F1/093 ,  G02F2201/17

Abstract: A reflection type Faraday rotator includes first to sixth reflection type sub-rotators. Light is made incident on the first to sixth sub-rotators while repeating reflecting thereat. A Faraday rotation occurs at a sub-rotator having a center wavelength equal to the wavelength of the light The sub-rotators are of reflection-type, have a larger bandwidth of outgoing light compared to a transmission type, and have center wavelengths (wavelength characteristics) different from one another. Thus, the effective wavelength range (the wavelength bandwidth) is increased. Expensive optical devices conventionally required for increasing the wavelength bandwidth are not needed. Accordingly, the cost can be reduced.

Abstract translation: 反射型法拉第旋转器包括第一至第六反射型次旋转器。 在第一至第六副转子上发生光，同时重复反射。 法拉第旋转发生在具有等于光的波长的中心波长的子旋转体上。副旋转体是反射型的，与透射型相比具有更大的出射带宽，并且具有中心波长（波长特性 ）不同。 因此，有效波长范围（波长带宽）增加。 传统上增加波长带宽所需的昂贵的光学装置是不需要的。 因此，可以降低成本。

公开(公告)号：US20030210366A1

公开(公告)日：2003-11-13

申请号：US10430019

申请日：2003-05-05

Inventor： Yi-Pai Huang ,  Xin-Yu Zhu ,  Shin-Tson Wu ,  Han-Ping Shieh

IPC: G02F001/1335

CPC classification number: G02F1/133555 ,  G02F2201/17

Abstract: Single cell gap transflective liquid crystal display which provides that the backlight traverses the reflective pixel portion twice and thereby follows a path similar to that of the ambient light. A slant reflector is built on the path of the back light to reflect the transmitted light to the reflective portion so that the back light and ambient light follow similar paths.

Abstract translation: 单电池间隙透反液晶显示器，其提供背光源穿过反射像素部分两次，从而遵循类似于环境光的路径。 在背光路径上建立倾斜反射器以将透射光反射到反射部分，使得背光和环境光遵循相似的路径。

公开(公告)号：US06560396B1

公开(公告)日：2003-05-06

申请号：US09606550

申请日：2000-06-29

Applicant: Mei Yan ,  Hongchuan Wang

Inventor： Mei Yan ,  Hongchuan Wang

IPC: G02B600

CPC classification number: G02F1/21 ,  G02B6/266 ,  G02B6/32 ,  G02F2201/17 ,  G02F2203/48

Abstract: This invention is related to method for assembling an optical attenuator to attenuate an optical beam. The method includes a step of a) collimating the optical beam from an input optical waveguide into a substantially collimated beam comprising an upper segmented-portion and a lower segmented-portion. The method further includes steps of b) transmitting the collimated onto a phase shifting means comprising at least an upper phase shifting means for generating a phase difference between the upper segmented-portion and the lower segmented-portion and c) generating a self-interference between the upper segmented-portion and the lower segmented-portion of the collimated beam and focusing the collimated beam into an output optical waveguide with an attenuation resulting from the self-interference.

Abstract translation: 本发明涉及用于组装光衰减器以衰减光束的方法。 该方法包括以下步骤：a）将来自输入光波导的光束准直成包括上分段部分和下分段部分的基本上准直的波束。 该方法还包括以下步骤：b）将准直发射到包括至少一个上相移装置的相移装置，用于产生上部分段部分和下部分段部分之间的相位差，以及c）产生自相干 准直光束的上部分段和下部分段，并将准直波束聚焦成具有由自干扰产生的衰减的输出光波导。

公开(公告)号：US20030072512A1

公开(公告)日：2003-04-17

申请号：US10061307

申请日：2002-02-04

Applicant: Fujitsu Limited

Inventor： Hiroshi Nagaeda ,  Nobuaki Mitamura ,  Kazuaki Akimoto

IPC: G02B006/27 ,  G02B006/35 ,  G02B027/28

CPC classification number: G02B6/29302 ,  G02B6/266 ,  G02B6/272 ,  G02B6/2766 ,  G02B27/286 ,  G02F1/0136 ,  G02F2201/17 ,  G02F2203/48

Abstract: An object of the invention is to provide a small and low-cost variable polarization plane rotator that can control a rotation angle of the polarization plane easily, and an optical device using the same. To this end, a variable polarization plane rotator according to the present invention is provided with a null/4 phase plate having an optical axis in the same direction as, or at a 90 degree angle relative to, a polarization direction of input light beam, to apply a 90 degree phase difference between polarization components parallel to and perpendicular to the optical axis thereof, a phase difference variable element having an optical axis at a null45 degree angle relative to the optical axis of the null/4 phase plate, to apply a variable phase difference between the polarization components parallel to and perpendicular to the optical axis thereof, and a phase difference adjustment section that adjusts the variable phase difference of the phase difference variable element, wherein the input light beam, after being transmitted through the phase difference variable element to be into elliptically polarized light or circularly polarized light, is transmitted through the null/4 phase plate to be into linearly polarized light, to thereby rotate the polarization plane of the input light beam by an angle corresponding to the phase difference applied by the phase difference variable element.

Abstract translation: 本发明的目的是提供一种能够容易地控制偏振面的旋转角度的小型和低成本的可变偏振面旋转器，以及使用其的光学装置。 为此，根据本发明的可变偏振面旋转器设置有相对于输入光束的偏振方向具有相同方向或相对于90度角的光轴的羔羊/ 4相位板， 在与其光轴平行且垂直于其光轴的偏振分量之间施加90度相位差，相对于羔羊/ 4相位板的光轴具有±45度角的相位差可变元件，以应用 平行于其垂直于其光轴的偏振分量之间的可变相位差以及调整相位差可变元件的可变相位差的相位差调整部分，其中输入光束在通过相位差发送之后 可变元件进入椭圆偏振光或圆偏振光，通过lambd / 4相平台传输 e进入线偏振光，从而使输入光束的偏振面旋转与由相位差可变元件施加的相位差对应的角度。

公开(公告)号：US20030026583A1

公开(公告)日：2003-02-06

申请号：US10053470

申请日：2001-11-02

Inventor： Clifford C. Hoyt ,  Peter J. Miller

IPC: G02B006/26 ,  G02B006/27 ,  G02F001/13 ,  G02B027/28

CPC classification number: G02F1/1326 ,  G02F1/13318 ,  G02F2201/17 ,  G02F2203/06 ,  G02F2203/48

Abstract: A variable optical attenuator including: a birefringent element positioned to separate an input optical signal into two spatially separated, orthogonally polarized beams; a LC modulator positioned to receive the orthogonally polarized beams and selectively alter their polarizations; a reflective element positioned to reflect the beams back through the LC modulator and the birefringent element, wherein the birefringent element recombines orthogonally polarized components of the reflected beams to produce an output optical signal; and a controller coupled to the LC modulator to selectively cause the LC modulator to alter the polarizations of the orthogonally polarized beams, wherein during operation the controller is responsive to a request to variably attenuate the intensity of the output optical signal relative to the intensity of the input optical signal to one of multiple non-zero attenuation settings.

Abstract translation: 一种可变光衰减器，包括：双折射元件，定位成将输入光信号分离成两个空间分离的正交偏振光束; 定位成接收正交偏振光束并选择性地改变其偏振的LC调制器; 反射元件，定位成将光束反射通过LC调制器和双折射元件，其中双折射元件将反射光束的正交极化分量重新组合以产生输出光信号; 以及控制器，其耦合到所述LC调制器以选择性地使所述LC调制器改变所述正交偏振光束的极化，其中在操作期间，所述控制器响应于相对于所述LC调制器的强度可变地衰减所述输出光信号的强度的请求 输入光信号到多个非零衰减设置之一。

公开(公告)号：US20020131755A1

公开(公告)日：2002-09-19

申请号：US09810851

申请日：2001-03-16

Inventor： Hongdu Liu ,  Daxin Liu ,  Shizhuo Yin ,  Lee Lisheng Huang

IPC: G02B006/27

CPC classification number: G02F1/09 ,  G02B6/266 ,  G02B6/2746 ,  G02F2201/17 ,  G02F2203/48

Abstract: The present invention relates to variable attenuation of an light beam by use of polarization rotators in which the degree of rotation of the polarization is determined by an externally-applied control signal leading to variable attenuation of the light beam under the control of the external signal. Randomly polarized light arrives at input port to the variable optical attenuator, encounters a birefringent crystal, is split into orthogonal polarization components and emerges from the crystal separated by a walk-off distance. The light beams then impinge on the surface of wave plates (polarization rotators) that are configured to cause a rotation of the plane of polarization by null45null and null45null rotation. Both light beams then impact a variable polarization rotator in which the plane of polarization is rotated through a angle that can be varied in response to an externally-applied control signal. The maximum operating range ( 0 to 100% attenuation) is achieved when the variable rotator is capable of rotations in the range null45null. A lesser range of attenuation is achievable with a smaller range of polarization rotation. The light beams then encounter a second birefringent crystal used as a beam displacer. The beams next encounter two wave plates configured to produce rotation angles of 0null and 90null respectively. The beams next strike a retroreflector that interchanges the vertical positions of the beams incident thereon. The returning light beams next encounter wave plates in the reverse direction followed by a reverse traverse that causes a rotation in the same sense and magnitude as on the forward traverse. The beams next encounter wave plates wave plates and birefringent crystal in the reverse direction, emerging at an output port attenuated in intensity.

Abstract translation: 本发明涉及通过使用偏振旋转器的光束的可变衰减，其中极化的旋转度由外部施加的控制信号确定，导致在外部信号的控制下光束的可变衰减。 随机偏振光到达可变光衰减器的输入端口，遇到双折射晶体，被分裂为正交偏振分量，并从离开距离的晶体出射。 光束然后撞击波片（偏振旋转器）的表面，其被配置为使偏振平面旋转+ 45°和-45°旋转。 两个光束然后冲击可变偏振旋转器，其中偏振平面旋转一个能够响应于外部施加的控制信号而变化的角度。 当可变转子能够在±45°的范围内旋转时，可实现最大工作范围（0至100％衰减）。 较小的偏振范围可以实现较小的衰减范围。 光束然后遇到用作光束置换器的第二双折射晶体。 光束接下来遇到两个波片，其配置为分别产生0°和90°的旋转角度。 光束接下来撞击一个后向反射器，它将入射到其上的光束的垂直位置相互交换。 返回的光束接下来在相反方向上遇到波片，接着是反向横越，其导致与向前横移相同的感测和幅度的旋转。 梁随后在反方向遇到波片波片和双折射晶体，出现在强度衰减的输出端口。

公开(公告)号：US20020097479A1

公开(公告)日：2002-07-25

申请号：US10045814

申请日：2002-01-15

Inventor： Joseph M. Fukumoto

IPC: G02F001/35

CPC classification number: G02F1/3551 ,  G02F1/3553 ,  G02F1/39 ,  G02F2201/16 ,  G02F2201/17 ,  G02F2201/18 ,  G02F2201/34 ,  G02F2203/05 ,  G02F2203/58 ,  H01S3/0809

Abstract: An arrangement (10) for efficiently generating tunable pulsed laser output at 8-12 microns. The arrangement (10) includes a laser (12), a first optical parametric oscillator (14) of unique design, and a second optical parametric oscillator (22). The first oscillator (14) is constructed with an energy shifting crystal (20) and first and second reflective elements (16) and (18) disposed on either side thereof. Energy from the laser (12) at a first wavelength is shifted by the crystal and output at a second wavelength. The second wavelength results from a secondary process induced by a primary emission of energy at a third wavelength, the third wavelength resulting from a primary process generated from the first wavelength in the crystal. Mirror coatings are applied on the reflective elements (16 and/or 18) for containing the primary emission and enhancing the secondary process. The second optical parametric oscillator (22) then shifts the energy output by the first OPO (14) at the second wavelength to the desired fourth wavelength. In the illustrative embodiment, the first optical parametric oscillator (14) includes an x-cut rubidium titanyl arsenate crystal (20) and the second optical parametric oscillator (22) includes a silver gallium selenide crystal. The first wavelength is approximately 1.06 microns, the second wavelength is approximately 3.01 microns, the third wavelength is approximately 1.61 microns, and the fourth wavelength is in the range of 8-12 microns.

Abstract translation: 一种用于有效地产生8-12微米可调脉冲激光输出的装置（10）。 该装置（10）包括激光器（12），独特设计的第一光学参量振荡器（14）和第二光学参量振荡器（22）。 第一振荡器（14）由能量转换晶体（20）和设置在其两侧的第一和第二反射元件（16）和（18）构成。 来自第一波长的激光器（12）的能量被晶体偏移并以第二波长输出。 第二波长是由第三波长的能量的初次发射引起的第二波长，由从晶体中的第一波长产生的初级波长产生的第三波长。 镜面涂层施加在反射元件（16和/或18）上，用于容纳主要发射并增强二次工艺。 然后，第二光学参量振荡器（22）将由第一OPO（14）输出的能量在第二波长处移位到期望的第四波长。 在说明性实施例中，第一光学参量振荡器（14）包括x切割的铷钛氧烷砷酸盐晶体（20），第二光学参量振荡器（22）包括银镓硒晶体。 第一波长约为1.06微米，第二波长约为3.01微米，第三波长约为1.61微米，第四波长在8-12微米的范围内。