公开(公告)号：US20030123783A1

公开(公告)日：2003-07-03

申请号：US10106360

申请日：2002-03-27

申请人： Fujitsu Limited

发明人： Hideyuki Miyata ,  Yoshihiko Kaitoh ,  Tadao Nakazawa ,  Masaharu Doi

IPC分类号： G02B006/26 ,  G02B006/30

CPC分类号： G02B6/29302 ,  G02B6/12004 ,  G02B6/2706 ,  G02B6/274 ,  G02B6/30 ,  G02B6/4246 ,  G02F1/116 ,  G02F2201/16

摘要： The present invention aims at providing a connecting method capable of suppressing an influence of stray light for a plurality of optical function devices formed on the same substrate, and an optical apparatus applied with the control method. To this end, in the connecting method of optical function devices according to the present invention, the plurality of optical function devices formed on the same substrate are cascade connected so that both ends of an optical path passing through the plurality of optical function devices are positioned on the same end face of the substrate. According to such a connecting method, it becomes possible to effectively suppress a leakage of stray light from an optical input side to an optical output side.

摘要翻译： 本发明的目的在于提供能够抑制杂散光对同一基板上形成的多个光学功能元件的影响的连接方法，以及应用了该控制方法的光学装置。 为此，在根据本发明的光功能器件的连接方法中，形成在同一衬底上的多个光学功能器件被级联连接，使得穿过多个光学功能器件的光路的两端被定位 在基板的相同端面上。 根据这种连接方式，能够有效地抑制杂散光从光输入侧向光输出侧的泄漏。

公开(公告)号：US20030123775A1

公开(公告)日：2003-07-03

申请号：US10265767

申请日：2002-10-08

申请人： FUJITSU LIMITED

发明人： Hideyuki Miyata ,  Yutaka Kai ,  Isao Tsuyama

IPC分类号： G02F001/335

CPC分类号： G02F1/116 ,  G02F2201/16 ,  G02F2203/585

摘要： The present invention relates to a control method and device for an optical filter, and a primary object of the present invention is to achieve accurate tracking control of the optical filter. Disclosed herein is a control method for an optical filter including first and second optical filter units cascaded, each having an input and first and second outputs. The first output of the first optical filter unit is connected to the input of the second optical filter unit. First light output from the second output of the first optical filter unit is converted into a first electrical signal having a level corresponding to the power of the first light, and second light output from the second output of the second optical filter unit is converted into a second electrical signal having a level corresponding to the power of the second light. A control signal is generated according to the first and second electrical signals. Then, the first and second optical filter units are controlled according to the control signal. According to this method, accurate tracking control of the optical filter can be achieved.

摘要翻译： 本发明涉及一种用于滤光器的控制方法和装置，本发明的主要目的是实现光学滤波器的精确跟踪控制。 本文公开了一种用于滤光器的控制方法，该滤光器包括级联的第一和第二滤光器单元，每个具有输入和第一和第二输出。 第一滤光单元的第一输出端连接到第二滤光单元的输入端。 将从第一滤光器单元的第二输出端输出的第一光转换成具有与第一光的功率相对应的电平的第一电信号，并且将从第二光滤波器单元的第二输出输出的第二光转换成 第二电信号具有与第二光的功率对应的电平。 根据第一和第二电信号产生控制信号。 然后，根据控制信号控制第一和第二滤光器单元。 根据该方法，可以实现光滤波器的精确跟踪控制。

公开(公告)号：US20030026558A1

公开(公告)日：2003-02-06

申请号：US10020412

申请日：2001-12-18

申请人： Fujitsu Limited

发明人： Hiroshi Miyata ,  Tadao Nakazawa

IPC分类号： G02B006/44

CPC分类号： G02B6/126 ,  G02B6/12007 ,  G02B2006/1215 ,  G02F1/116 ,  G02F1/125

摘要： The present invention aims at providing an optical waveguide filter for reliably selecting light of desired wavelength using polarization mode conversion, to realize a sufficient extinction ratio. To this end, according to the present invention, in an optical waveguide filter provided with an input side polarization splitting section that polarization splits light input to an input waveguide, and outputs to first and second waveguides, a mode converting section that performs polarization mode conversion on only the light corresponding to desired wavelength among the lights being propagated through the first and second waveguides, and an output side polarization splitting section that polarization splits the propagated lights of the respective waveguides having passed through the mode converting section, there is disposed a first polarization splitting section on the first waveguide and a second polarization splitting section on the second waveguide, which are positioned between the input side and output side polarization splitting sections, and a non-split component generated corresponding to a splitting rate in the input side polarization splitting section is eliminated so that only the selected light is output to an output waveguide.

摘要翻译： 本发明旨在提供一种光波导滤波器，用于使用偏振模式转换可靠地选择所需波长的光，以实现足够的消光比。 为此，根据本发明，在设置有输入侧的偏振分离部的光波导路径滤波器中，所述输入侧偏振分离部使输入到输入波导的光分离，并向第一和第二波导输出，进行偏振模式转换的模式转换部 在仅通过第一和第二波导传播的光中的对应于期望波长的光上，以及输出侧偏振分束部，其使通过模式转换部的各个波导的传播光分离， 第一波导上的偏振分离部和第二波导上的位于输入侧偏振光分离部和输出侧偏振光分离部之间的第二偏振光分离部，以及与输入侧偏振光分离中的分光率相对应地生成的非分割分量 部分被淘汰 只有所选择的光被输出到输出波导。

公开(公告)号：US20020114057A1

公开(公告)日：2002-08-22

申请号：US09788978

申请日：2001-02-20

申请人： Eastman Kodak Company

发明人： James E. Roddy ,  William R. Markis

IPC分类号： G02F001/23 ,  G02F001/11

CPC分类号： H04N5/74 ,  G02F1/116 ,  H01S5/06213 ,  H01S5/0652 ,  H04N5/7416 ,  H04N9/3129

摘要： A system and method for reducing or eliminating the speckle intensity distribution of a laser imaging system. In one embodiment of the invention, a radio frequency signal is injected into a semiconductor laser light source (12) for a projection system (10) to create different speckle patterns that blend together on a projection surface (19). In another embodiment of the invention, optical feedback is used to induce a laser light source for a projection system (10) to create different speckle patterns that blend together on a projection surface (19). In another embodiment of the invention, the laser light source wavelength is Doppler shifted to produce different speckle patterns. In another embodiment of the invention, a means of deflection is used to directionally move the beam to reduce noticeable speckle. Since the eye is very sensitive to horizontal and vertical edges, but less sensitive to angles in between, beam movement of approximately 45 degrees may minimize the loss of MTF in the horizontal and vertical directions.

摘要翻译： 一种用于减少或消除激光成像系统的斑点强度分布的系统和方法。 在本发明的一个实施例中，将射频信号注入用于投影系统（10）的半导体激光光源（12）中，以在投影表面（19）上产生混合在一起的不同散斑图案。 在本发明的另一个实施例中，光学反馈用于诱导用于投影系统（10）的激光光源，以在投影表面（19）上产生混合在一起的不同散斑图案。 在本发明的另一实施例中，激光光源波长被多普勒偏移以产生不同的散斑图案。 在本发明的另一个实施例中，偏转装置用于定向地移动光束以减少明显的斑点。 由于眼睛对水平和垂直边缘非常敏感，但对角度之间的角度较不敏感，大约45度的光束移动可以使水平和垂直方向上MTF的损失最小化。

公开(公告)号：US20010008450A1

公开(公告)日：2001-07-19

申请号：US09755041

申请日：2001-01-08

发明人： Tadao Nakazawa

IPC分类号： H04J014/02

CPC分类号： G02F1/116 ,  G02F2201/16 ,  H04J14/0209 ,  H04J14/021 ,  H04J14/0213

摘要： An AOTF drive method for driving a plurality of AOTFs connected in tandem comprises: separating a plurality of RF signals in advance into a plurality of groups; batch-branching the RF signals of each group in accordance with the number of steps of the AOTFS; and batch-adjusting the phases of the individual branched RF signals. As a result, this makes it possible to reduce the number of phase shifters compared to the prior art while maintaining the effectiveness of suppressing beats in the AOTFs.

摘要翻译： 用于驱动串联连接的多个AOTF的AOTF驱动方法包括：将多个RF信号预先分离成多个组; 根据AOTFS的步骤数量对每组的RF信号进行批量分支; 并批量调整各个分支RF信号的相位。 结果，与现有技术相比，可以减少移相器的数量，同时保持抑制AOTF中的节拍的效果。

公开(公告)号：US6072813A

公开(公告)日：2000-06-06

申请号：US29065

申请日：1998-03-02

申请人： Pierre Tournois

发明人： Pierre Tournois

IPC分类号： G02F1/11 ,  G02F1/125 ,  H01S3/00 ,  H01S3/10

CPC分类号： H01S3/0057 ,  G02F1/11 ,  G02F1/113 ,  G02F1/116 ,  G02F1/125 ,  G02F2203/26

摘要： A programmable acoustooptic device including an elastooptic medium configured to receive an input optical pulse and an acoustic wave; an acoustic transducer configured to generate the acoustic wave in the elastooptic medium along a defined direction; and a programmable circuit coupled to the acoustic transducer and configured to program at least one of a frequency modulation and phase modulation of the acoustic wave, whereby the acoustic transducer generates a modulated acoustic wave, wherein an output optical pulse is generated and is a convolution of the input optical pulse with the modulated acoustic signal.

摘要翻译： PCT No.PCT / FR97 / 01206 Sec。 371日期1998年3月2日 102（e）1998年3月2日PCT PCT 1997年7月4日PCT公布。 第WO98 / 01788号公报 日期1998年1月15日一种可编程声光装置，包括配置成接收输入光脉冲和声波的弹性介质; 声学换能器，其构造成沿着限定的方向在弹性光学介质中产生声波; 以及耦合到所述声换能器并被配置为对所述声波的频率调制和相位调制中的至少一个进行编程的可编程电路，由此所述声换能器产生调制声波，其中产生输出光脉冲并且是卷积 具有调制声信号的输入光脉冲。

公开(公告)号：US6016216A

公开(公告)日：2000-01-18

申请号：US858093

申请日：1997-05-17

申请人： I-Cheng Chang

发明人： I-Cheng Chang

IPC分类号： G02F1/11 ,  G02F1/33

CPC分类号： G02F1/33 ,  G02F1/116 ,  G02F2203/06

摘要： A polarization independent acousto-optic tunable filter (PIAOTF) used for multiwavelength switching and routing in wavelength division multiplexing (WDM) networks. In the PIAOTF an incident unpolarized light beam is divided to propagate and to be diffracted along two polarization division branches. By using polarization converters and equal optical paths for the two polarization division channels, a PIAOTF is created which minimizes polarization dependent loss and polarization mode dispersion. Furthermore, a preferred embodiment of the AOTF using an elongated acousto-optic interaction medium is described that provides the additional advantages of narrow bandwidth, lower drive power and easier alignment.

摘要翻译： 用于波分复用（WDM）网络中的多波长切换和路由的偏振独立声光可调滤波器（PIAOTF）。 在PIAOTF中，入射的非偏振光束被分割成传播并沿两个偏振分支分支衍射。 通过对两个偏振分频通道使用偏振转换器和相等的光路，产生了一个最小化偏振相关损耗和偏振模色散的PIAOTF。 此外，描述了使用细长声光交互介质的AOTF的优选实施例，其提供窄带宽，较低驱动功率和更容易对准的附加优点。

公开(公告)号：US5973822A

公开(公告)日：1999-10-26

申请号：US998042

申请日：1997-12-23

申请人： Kexin Xu ,  Hiroshi Yamamoto ,  Bin Xue

发明人： Kexin Xu ,  Hiroshi Yamamoto ,  Bin Xue

IPC分类号： G02F1/33 ,  G02F1/11

CPC分类号： G02F1/116

摘要： In a non-collinear type acousto-optic tunable filter, the incident angle of a source light beam L.sub.1 radiated from a light source 6 onto an acoustic medium 1 is set at an equivalence incident angle for which the wavelength .lambda..sub.i of the diffracted ordinary ray L.sub.3 and the wavelength .lambda..sub.i ' of the diffracted extraordinary ray L.sub.4 become approximately identical. Further, the diffracted ordinary ray L.sub.3 and the diffracted extraordinary ray L.sub.4 of the approximately identical wavelength are superposed, and the intensity of the superposed ray is detected. Consequently, spectrometry is performed based on the superposed diffracted ray having twice the intensity and a very sharp waveform, so that accurate spectroscopy can be made possible even if the intensity of the source light beam is low.

摘要翻译： 在非共线型声光可调滤波器中，从光源6辐射到声学介质1上的源光束L1的入射角被设定为等于入射角，对于该入射角，衍射普通光线的波长λi L3和衍射异常射线L4的波长λi'变得大致相同。 此外，将衍射的普通光线L3和大致相同波长的衍射非凡光线L4重叠，并且检测叠加的光线的强度。 因此，基于具有两倍强度和非常尖锐的波形的叠加衍射光线进行光谱测定，使得即使源光束的强度低，也可以使精确的光谱学成为可能。

公开(公告)号：US5970077A

公开(公告)日：1999-10-19

申请号：US986059

申请日：1997-12-05

申请人： Henry Allen Hill

发明人： Henry Allen Hill

IPC分类号： G02F1/11 ,  G02F2/02 ,  H01S3/106 ,  H01S3/10

CPC分类号： G02F1/116 ,  G02F1/11 ,  G02F2203/07 ,  H01S3/1068

摘要： Electro-optical devices comprising a multifaceted anisotropic acousto-optical crystal for transforming a single-frequency beam comprising two individual linearly-orthogonally, polarized input beams into an output beam having two linearly-orthogonally, polarized principal output beams having frequencies that differ from each other and the input beam where the input beam preferably is a laser of frequency, f.sub.L. While the directions of propagation of the individual input beams are preferably parallel, and the directions of propagation of the principal output beams are preferably parallel, they need not be and instead the individual input beams and the principal output beams may beneficially have their own predetermined angle of divergence or convergence, respectively. The energy flux profiles of the individual input beams may be spatially separated, partially coextensive, or substantially coextensive and the energy flux profiles of the principal output beams may be spatially separated, partially coextensive, or substantially coextensive in accordance with the details of particular device embodiments and the requirements of the metrology or other contemplated application. In addition, thermal compensation may be made available through the exploitation of the principles of symmetry while power requirements may be reduced through the use of multiple pass arrangements for optical beams traveling through the interaction region of the anisotropic acousto-optical crystal.

摘要翻译： 包括用于将包括两个单独的线性正交极化输入光束的单频波束变换为具有两个具有彼此不同频率的线性正交极化主输出光束的输出光束的多光学各向异性声光晶体的电光装置 输入光束优选为频率为fL的激光器的输入光束。 尽管各个输入光束的传播方向优选地是平行的，并且主输出光束的传播方向优选地是平行的，但它们不需要并且代替地，各个输入光束和主输出光束可以有利地具有它们自己的预定角度 分散或收敛。 各个输入光束的能量通量分布可以在空间上分离，部分共延伸或基本上共同延伸，并且根据特定装置实施例的细节，主输出光束的能量通量分布可以在空间上分离，部分共延伸或基本共同延伸 以及计量或其他预期应用的要求。 此外，通过利用对称原理可以获得热补偿，同时通过对通过各向异性声光晶体的相互作用区域的光束使用多通路布置来降低功率需求。

公开(公告)号：US5936981A

公开(公告)日：1999-08-10

申请号：US848218

申请日：1997-04-29

申请人： Satoshi Wada ,  Kazuyuki Akagawa ,  Hideo Tashiro

发明人： Satoshi Wada ,  Kazuyuki Akagawa ,  Hideo Tashiro

IPC分类号： G02F1/35 ,  G02F1/11 ,  H01S3/094 ,  H01S3/106 ,  H01S3/108 ,  H01S3/16 ,  H01S3/10

CPC分类号： H01S3/1068 ,  G02F1/116 ,  H01S3/094038 ,  H01S3/1625 ,  H01S3/1636

摘要： An object of the present invention is to provide a wavelength selectable laser oscillator in wavelength tunable laser by which the rate of repetitive pulse oscillation of laser beam in a laser resonator can be markedly increased in comparison with that of conventional ones, besides excitation input can be decreased, and in addition, speed-up of wavelength tuning speed can be achieved, whereby flexibility is remarkably elevated in case of practicing the wavelength selectable laser oscillator. The wavelength selectable laser oscillator in wavelength tunable laser comprises a laser resonator composed of opposed mirrors each having a prescribed reflectivity; a wavelength tunable laser medium disposed in the laser resonator and capable of laser oscillation in a wavelength zone of a prescribed range; an acousto-optical crystal disposed in the laser oscillator and to which is inputted the outgoing light from the wavelength tunable laser medium; an acoustic wave inputting means mounted on the acousto-optical crystal and for inputting an acoustic wave to the acousto-optical crystal; an optical element disposed in the laser resonator and for correcting dispersion of the diffracted light outputted from the acousto-optical crystal; and a pulse excitation laser for inputting excitation laser beam into the laser resonator.

摘要翻译： 本发明的目的是提供一种波长可调激光器中的波长可选激光振荡器，其中激光谐振器中的激光束的重复脉冲振荡速率可以与常规激光振荡器相比显着增加，除了激励输入可以 降低，另外，可以实现波长调谐速度的加快，从而在实施波长可选激光振荡器的情况下，柔性显着提高。 波长可调激光器中的波长可选激光振荡器包括由相对的反射镜组成的激光谐振器，每个反射镜具有规定的反射率; 设置在所述激光谐振器中并能够在规定范围的波长区域内进行激光振荡的波长可调激光介质; 设置在激光振荡器中的声光晶体，并从波长可调激光介质输入出射光; 声波输入装置，安装在声光晶体上，并将声波输入声光晶体; 设置在所述激光谐振器中并用于校正从所述声光晶体输出的衍射光的色散的光学元件; 以及用于将激发激光束输入激光谐振器的脉冲激励激光器。