公开(公告)号：US5007693A

公开(公告)日：1991-04-16

申请号：US494381

申请日：1990-03-16

申请人： Shuntaro Yamazaki ,  Takashi Ono ,  Haruhito Shimizu

发明人： Shuntaro Yamazaki ,  Takashi Ono ,  Haruhito Shimizu

IPC分类号： G02F2/00 ,  H04B10/2513 ,  H04B10/2569 ,  H04B10/516 ,  H04B10/61 ,  H04B10/63 ,  H04B10/64 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04B10/61 ,  H04B10/6151 ,  H04B10/63 ,  H04B10/64

摘要： Frequency division multiplex signal lights are propagated through an optical fiber, and polarizations of the lights are collectively controlled by a polarization controller. The polarization-controlled signal lights are received separately in receiving systems including optical heterodyne or homodyne receivers. In the collective polarization control, a step is selected from steps of controlling relative polarization states of local oscillation lights to coincide to each other, receiving a control signal from one of the receiving systems which receives a signal light of a frequency to be allocated in the center of a frequency band of the signal lights or the vicinity thereof, and dividing the frequency division multiplex signal lights into plural groups, thereby controlling polarizations collectively in each of the plural groups. One of the polarizations of the signal lights may be orthogonal to the others, and one of the polarizations of the local oscillation lights may be orthogonal to the others correspondingly.

摘要翻译： 频分复用信号光通过光纤传播，并且光的偏振由偏振控制器共同控制。 偏振控制的信号灯在包括光学外差或零差接收机的接收系统中被单独接收。 在集体极化控制中，从控制本地振荡光的相对极化状态到彼此重合的步骤中选择一个步骤，从接收要接收频率的信号光的接收系统之一接收控制信号 信号光的频带的中心或其附近，并且将分频多路复用信号光分成多个组，从而在多个组中的每一个中集中控制偏振。 信号光的偏振之一可以与其他的正交，本地振荡光的极化之一可以相应地与其他方向正交。

公开(公告)号：US5307197A

公开(公告)日：1994-04-26

申请号：US935977

申请日：1992-08-27

申请人： Takashi Tanabe ,  Haruhito Shimizu

发明人： Takashi Tanabe ,  Haruhito Shimizu

IPC分类号： G02B6/126 ,  H04B10/61 ,  H04B10/64 ,  H04B10/06

CPC分类号： H04B10/61 ,  G02B6/126 ,  H04B10/614 ,  H04B10/64

摘要： An optical circuit according to the present invention includes a first beam splitter for splitting a signal light to two polarization lights, first and second optical couplers for coupling the split signal lights and local lights in each, and second and third beam splitters for coupling corresponding polarization lights supplied from the first and second optical couplers. The second and third beam splitters supply output signals to one double-balanced receiver of a polarization diversity receiver.

摘要翻译： 根据本发明的光学电路包括用于将信号光分离成两个偏振光的第一分束器，用于耦合每个和第二和第三分束器中的分离信号光和局部光的第一和第二光耦合器，用于耦合相应的极化 从第一和第二光耦合器提供的光。 第二和第三分束器将输出信号提供给偏振分集接收器的一个双平衡接收器。

公开(公告)号：US5004312A

公开(公告)日：1991-04-02

申请号：US491908

申请日：1990-03-12

申请人： Haruhito Shimizu

发明人： Haruhito Shimizu

IPC分类号： G02B26/00 ,  G02F1/01

CPC分类号： G02F1/0136

摘要： First to fifth birefringences are generated in series along a light propagating medium. The first to fifth birefringences have main axes of 0.degree., 45.degree., 0.degree., 45.degree. and 0.degree. relative to an arbitrary direction orthogonal to a light propagating direction of the medium. The magnitude of the birefringences are changed to change first to fifth phase differences. In an ordinary polarization control, the second to fourth phase differences are changed. However, one or both of the first and fifth phase differences are changed in a resetting operation for one of the second to fourth phase differences. Consequently, the phase differences are reset without the dependency on polarizations of an input light supplied to a polarization controller and an output light supplied from the polarization controller.

公开(公告)号：US5684632A

公开(公告)日：1997-11-04

申请号：US341201

申请日：1994-12-05

申请人： Haruhito Shimizu

发明人： Haruhito Shimizu

IPC分类号： G02B26/00 ,  G02B5/20 ,  G02B5/28 ,  G02B27/00

CPC分类号： G02B5/20

摘要： In a variable wavelength optical filter, a glass plate has a curved surface on one or both sides thereof, and a dielectric multi-layer thin film formed on the curved surface. Light from the outside of the filter is transmitted through the film. The glass plate is movable perpendicularly to an optical axis by being driven by a piezoelectric actuator accommodated in a housing. By moving the glass plate, it is possible to control the angle of the film relative to the incident light and, therefore, the pass wavelength. The actuator positions the glass plate with accuracy, promoting extremely accurate wavelength control. The glass plate may be provided with a convexity on one side and a concavity on the other side which is complementary in configuration to the convexity. This reduces the wavelength dependency of the insertion loss by maintaining the optical axis of input light and that of output light in coindicence.

摘要翻译： 在可变波长光学滤波器中，玻璃板在其一侧或两侧具有弯曲表面，并且在弯曲表面上形成介电多层薄膜。 来自滤光器外部的光通过胶片传播。 玻璃板可以通过容纳在壳体中的压电致动器驱动而垂直于光轴移动。 通过移动玻璃板，可以控制膜相对入射光的角度，并因此控制通过波长。 执行器精确定位玻璃板，促进极其精确的波长控制。 玻璃板可以在一侧具有凸起，在另一侧可以具有与凸部相配合的凹面。 通过保持输入光的光轴和输出光的光轴，减少了插入损耗的波长依赖性。

公开(公告)号：US5603570A

公开(公告)日：1997-02-18

申请号：US335075

申请日：1994-11-07

申请人： Haruhito Shimizu

发明人： Haruhito Shimizu

IPC分类号： H01S5/00 ,  G05D23/19 ,  H01S5/022 ,  H01S5/024 ,  H01S5/068 ,  H01S5/0687 ,  G02F1/015 ,  G01K1/20

CPC分类号： G05D23/1917 ,  H01S5/02248 ,  H01S5/02284 ,  H01S5/02415 ,  H01S5/02438 ,  H01S5/06804 ,  H01S5/0687

摘要： The temperature control of a device incorporated in a module is performed using a device temperature and a surroundings temperature of the device. The device temperature is detected by a device temperature sensor disposed near the device and the surroundings temperature is detected by a surroundings temperature sensor disposed on the module. Using the surroundings temperature when the device is operated, an actual temperature difference between the device temperature and a predetermined control target temperature is estimated based on a predetermined relation between the surroundings temperature and the device temperature detected when desired characteristics of the device are obtained. The device temperature detected when the device is operated is compensated with the estimated temperature difference to adjust the temperature of the device on the predetermined control target temperature.

摘要翻译： 使用装置的装置温度和周围环境温度进行装配在模块中的装置的温度控制。 器件温度由位于器件附近的器件温度传感器检测，周围温度由设置在模块上的环境温度传感器检测。 使用设备操作时的环境温度，基于当获得设备的期望特性时检测到的环境温度和设备温度之间的预定关系，估计设备温度和预定控制目标温度之间的实际温差。 当设备运行时检测到的设备温度用估计的温差补偿，以便在预定的控制目标温度下调节设备的温度。

公开(公告)号：US5960142A

公开(公告)日：1999-09-28

申请号：US909661

申请日：1997-08-12

申请人： Haruhito Shimizu

发明人： Haruhito Shimizu

IPC分类号： G02B6/42 ,  H01L35/32 ,  H01S5/00 ,  H01S5/024

CPC分类号： H01S5/02415 ,  H01L35/32 ,  H01S5/005 ,  H01S5/02208 ,  H01S5/02248 ,  H01S5/02284

摘要： A Peltier cooler (12) according to the present invention has a structure in which a Peltier device (12c) is put between a low temperature side substrate part (12a) and a high temperature side substrate part (12b) both made of insulating material. A first metal frame (22a) and a second metal frame (22b) are solder-fixed to the edge portions of the insulating substrates, respectively. The first and second metal frames (22a) and (22b) can be fixed highly precisely and stably by means of laser welding. By so doing, no solder creep occurs on the semiconductor laser module, thereby ensuring the stable arrangement of the optical system for a long time.

摘要翻译： 根据本发明的珀耳帖冷却器（12）具有将珀尔帖装置（12c）放置在由绝缘材料制成的低温侧基板部分（12a）和高温侧基板部分（12b）之间的结构。 第一金属框架（22a）和第二金属框架（22b）分别焊接固定到绝缘基板的边缘部分。 第一和第二金属框架（22a）和（22b）可以通过激光焊接高精度和稳定地固定。 通过这样做，半导体激光器模块上不发生焊料蠕变，从而确保光学系统长时间的稳定布置。

公开(公告)号：US5706302A

公开(公告)日：1998-01-06

申请号：US616051

申请日：1996-03-14

申请人： Haruhito Shimizu

发明人： Haruhito Shimizu

IPC分类号： G02B6/32 ,  F25B21/02 ,  G02B6/42 ,  H01L35/00 ,  H01S5/00 ,  H01S5/022 ,  H01S5/024 ,  H01S5/068 ,  H01S3/045

CPC分类号： H01S5/02284 ,  H01S5/02415

摘要： A Peltier cooler includes a plurality of Peltier elements, first and second ceramic substrates that are disposed to hold the Peltier elements through metallized electrodes formed inside the ceramic substrates and to electrically connect the Peltier elements in series, and first and second metal substrates respectively fixed to the first and second ceramic substrates by brazing, so as to hold them. The metal substrates are fixable to a substrate on which optical components are mounted and a semiconductor laser package, by yttrium-aluminum-garnet (YAG) laser welding. The YAG laser welding and the brazing operation eliminate the use of low-temperature solder, where creeps may occur.

摘要翻译： 珀尔帖冷却器包括多个珀耳帖元件，第一和第二陶瓷基板被设置成通过形成在陶瓷基板内部的金属化电极来保持珀耳帖元件并将珀耳帖元件串联电连接，第一和第二金属基板分别固定到 第一和第二陶瓷基板通过钎焊，以便保持它们。 通过钇 - 铝 - 石榴石（YAG）激光焊接，金属基板可固定到其上安装有光学部件的基板和半导体激光器封装。 YAG激光焊接和钎焊操作消除了使用可能发生蠕变的低温焊料。

公开(公告)号：US4898441A

公开(公告)日：1990-02-06

申请号：US188870

申请日：1988-05-02

申请人： Haruhito Shimizu

发明人： Haruhito Shimizu

IPC分类号： G02F1/01 ,  G02F1/035

CPC分类号： G02F1/0353 ,  G02F1/0136 ,  G02F2201/066

摘要： A polarization controller comprises a plurality of devices connected in series to each other. Each device includes an optical channel waveguide which is common to the plurality of the devices, and an electrode positioned on the optical channel waveguide and two electrodes positioned on both sides of the optical channel waveguide. A retardation induced by electrooptic effect in each device is adjusted by voltages applied to the electrode and the two electrodes. The voltages are not kept increasing or decreasing, but changed periodically so that there is no limitation in an operating range for controlling a polarization of light which is propagated through the optical channel waveguide.

公开(公告)号：US4752120A

公开(公告)日：1988-06-21

申请号：US840828

申请日：1986-03-18

申请人： Haruhito Shimizu

发明人： Haruhito Shimizu

IPC分类号： G02B6/126 ,  G02F1/01 ,  G02F1/03 ,  G02F1/035 ,  G02B6/10

CPC分类号： G02F1/0353 ,  G02B6/126 ,  G02F1/0136 ,  G02F1/0327

摘要： For first and second polarization controlling elements (181, 182) driven by first and second driving voltages in a polarization controlling device, a beam splitter (15) has a dividing ratio controllable between 1:0 and 0:1 and divides an input polarized beam having an input polarization state. An output polarized beam is derived from first and second polarization controlled beams to have an output polarization state. While the dividing ratio is kept at 1:0 so that the second polarization controlled beam is null, the first driving voltage may approach either of a positive and a negative limit. In this event, a control unit (25) changes the dividing ratio to 0:1. Even while the second polarization controlled beam is null, the control unit controls the second driving voltage so that the both driving voltages are congruent modulo a unit voltage difference which makes each element carry out equivalent polarization control. The first driving voltage is likewise controlled. When the input polarization state optionally varies, the output polarization state can be defined by a mode filter, a laser diode, or two parameters descriptive of a coherent polarized beam. Irrespective of the input polarization state, the output polarization state can be defined by a signal beam which reaches the device with an optionally varying polarization state.

摘要翻译： 对于通过偏振控制装置中的第一和第二驱动电压驱动的第一和第二偏振控制元件（181,182），分束器（15）具有可在1：0和0：1之间控制的分频比，并将输入偏振光束 具有输入偏振状态。 输出偏振光束从第一和第二偏振控制光束导出为具有输出偏振状态。 虽然分频比保持在1:0，使得第二偏振控制光束为零，但是第一驱动电压可以接近正极和负极限。 在这种情况下，控制单元（25）将分频比改变为0：1。 即使当第二偏振控制光束为零时，控制单元控制第二驱动电压，使得两个驱动电压是均匀的模数单位电压差，这使得每个元件执行等效的偏振控制。 同样控制第一驱动电压。 当输入偏振状态可选地变化时，输出偏振状态可以由模式滤波器，激光二极管或描述相干偏振光束的两个参数来定义。 无论输入极化状态如何，输出偏振状态可以由到达具有可选择的偏振态的器件的信号光束来限定。