公开(公告)号：US20030194163A1

公开(公告)日：2003-10-16

申请号：US10437186

申请日：2003-05-14

Applicant: Fujitsu Limited

Inventor： Masaharu Doi ,  Tetsuo Ishizaka ,  Takehito Tanaka

IPC: G02F001/035

CPC classification number: H04B10/505 ,  G02F1/2255 ,  G02F2201/16 ,  H04B10/5051 ,  H04B10/508 ,  H04B10/5162

Abstract: A first optical waveguide, a second optical waveguide, a first electrode, and a second electrode are integrated on a substrate. An optical modulator is provided with a clock signal generator for generating an RZ signal by applying a clock signal to either the first or second electrode, and an NRZ data signal generator for supplying an NRZ data signal to the remaining electrode. Thus, the space required by the optical modulator is reduced while tolerance of the same is improved, thus reducing costs for constructing the optical modulator.

公开(公告)号：US20030174381A1

公开(公告)日：2003-09-18

申请号：US10286779

申请日：2002-11-04

Applicant: FUJITSU LIMITED

Inventor： Takashi Ishiwada ,  Hirotomo Izumi ,  Hiroshi Nagaeda ,  Nobuaki Mitamura

IPC: G02F001/09

CPC classification number: G02B6/2746 ,  G02B6/272 ,  G02B6/2766 ,  G02B6/29358 ,  G02B6/29395 ,  G02B26/001 ,  G02B27/283 ,  G02F1/093 ,  G02F2001/213 ,  G02F2201/16 ,  G02F2203/05 ,  G02F2203/06

Abstract: The present invention aims at providing a transmission wavelength characteristics variable optical element which can actively equalize changes of the wavelength characteristics due to temperature changes, and providing a wavelength characteristics variable apparatus, an optical amplifier, an optical transmission system, and a control method of the transmission wavelength characteristics, which use such an optical element. To this end, the transmission wavelength characteristics variable optical element according to the present invention comprises: an light interference section in which for example reflection films are formed on a light incident plane and a light emitting plane of a magneto-optic crystal; a permanent magnet that applies a fixed magnetic field to the magneto-optic crystal; an electromagnet that applies a variable magnetic field in a direction different from that of the fixed magnetic field; and a variable current source that controls the current flowing in the electromagnet, and varies transmission wavelength characteristics which occur due to an interference of light multireflected between the reflection films, by changing a Faraday rotation angle given to the light being propagated within the magneto-optic crystal, corresponding to a synthetic magnetic field formed by the fixed magnetic field and the variable magnetic field.

Abstract translation: 本发明的目的在于提供一种传输波长特性可变光学元件，其可以主动地均衡由于温度变化引起的波长特性的变化，并且提供波长特性可变设备，光放大器，光传输系统和控制方法 透射波长特性，其使用这种光学元件。 为此，根据本发明的透射波长特性可变光学元件包括：光干涉部，其例如在光入射面上形成反射膜和磁光晶体的发光面; 将固定磁场施加到磁光晶体的永磁体; 电磁体，其在与固定磁场的方向不同的方向上施加可变磁场; 以及可变电流源，其控制在电磁体中流动的电流，并且通过改变给予在磁光内传播的光的法拉第旋转角度，改变由于反射膜之间多次反射的光的干涉而发生的透射波长特性 晶体，对应于由固定磁场和可变磁场形成的合成磁场。

公开(公告)号：US20030165295A1

公开(公告)日：2003-09-04

申请号：US10378411

申请日：2003-03-03

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Christopher Doerr

IPC: G02B006/26 ,  G02F001/035

CPC classification number: G02B6/29355 ,  G02F1/3132 ,  G02F2201/16

Abstract: A low-loss integrated optical coupler includes at least three substantially similar optical couplers, adjacent ones of the optical couplers interconnected via at least one set of waveguides, each of the sets of waveguides comprising a path-length difference between the waveguides therein. In one embodiment of the present invention, the multi-section optical coupler comprises at least two arms and the path-length differences are adjustable such that signals traversing the at least two arms undergo a relative phase shift, such that a desired output power splitting ratio for the multi-section optical coupler is achieved. Alternatively, the optical coupler is implemented in an inventive optical device that functions at least, as an optical switch or an optical splitter.

Abstract translation: 低损耗集成光耦合器包括至少三个基本上相似的光耦合器，通过至少一组波导互连的相邻光耦合器中的每一个波导组中的每一个包括其中的波导之间的路径长度差。 在本发明的一个实施例中，多段光耦合器包括至少两个臂，并且路径长度差是可调节的，使得穿过至少两个臂的信号经历相对相移，使得期望的输出功率分配比 实现了多段光耦合器。 或者，光耦合器实现在本发明的光学装置中，其至少用作光开关或光分路器。

公开(公告)号：US06594407B2

公开(公告)日：2003-07-15

申请号：US09799120

申请日：2001-03-06

Applicant: Masaharu Doi ,  Tetsuo Ishizaka ,  Takehito Tanaka

Inventor： Masaharu Doi ,  Tetsuo Ishizaka ,  Takehito Tanaka

IPC: G02F101

CPC classification number: H04B10/505 ,  G02F1/2255 ,  G02F2201/16 ,  H04B10/5051 ,  H04B10/508 ,  H04B10/5162

Abstract: A first optical waveguide, a second optical waveguide, a first electrode, and a second electrode are integrated on a substrate. An optical modulator is provided with a clock signal generator for generating an RZ signal by applying a clock signal to either the first or second electrode, and an NRZ data signal generator for supplying an NRZ data signal to the remaining electrode. Thus, the space required by the optical modulator is reduced while tolerance of the same is improved, thus reducing costs for constructing the optical modulator.

公开(公告)号：US06594063B1

公开(公告)日：2003-07-15

申请号：US09663816

申请日：2000-09-15

Applicant: Brent Bergner ,  Richard Albert ,  D. L. Seekola

Inventor： Brent Bergner ,  Richard Albert ,  D. L. Seekola

IPC: G02F103

CPC classification number: G02F1/31 ,  G02F1/1326 ,  G02F1/13363 ,  G02F1/13471 ,  G02F1/1393 ,  G02F2201/16 ,  G02F2203/06

Abstract: A polarization independent optical device is provided wherein the device has two optical paths that include one or more birefringent crystals, a electrically controllable rotator, and a fixed waveplate. The device may operate as a switch, attenuator, coupler, or polarization mode dispersion compensator. The device may also include several folded path embodiments, a multifunctional embodiment, and a temperature insensitive embodiment.

公开(公告)号：US06560391B2

公开(公告)日：2003-05-06

申请号：US10098381

申请日：2002-03-18

Applicant: Masahiro Yamada ,  Kiyoshi Osato

Inventor： Masahiro Yamada ,  Kiyoshi Osato

IPC: G11B7135

CPC classification number: G02F1/0508 ,  G02B2006/1204 ,  G02F1/2955 ,  G02F1/31 ,  G02F2001/311 ,  G02F2201/16 ,  G02F2202/07

Abstract: Disclosed herein is an optical switch including: a dielectric substrate having a pair of main surfaces opposed to each other; and a pair of electrodes formed on the main surfaces of the dielectric substrate; wherein a direction of emergence of a light beam propagating in the dielectric substrate is controlled according to an electric field applied from the electrodes to the dielectric substrate; the dielectric substrate being formed with a periodic structure of polarization inverted domains each having a given shape; the light beam being incident on domain walls of the polarization inverted domains; the electrode formed on at least one of the main surfaces being separated into at least first and second electrodes in a direction of propagation of the light beam.

公开(公告)号：US20030043431A1

公开(公告)日：2003-03-06

申请号：US10060688

申请日：2002-01-30

Inventor： Naresh Chand ,  Keisuke Kojima ,  Thomas Gordon Beck Mason ,  Jianjun Yu ,  Rolando Espindola

IPC: H04J014/08 ,  H04B010/06

CPC classification number: H04B10/675 ,  B82Y20/00 ,  G02F1/01708 ,  G02F2001/0157 ,  G02F2201/16 ,  H04B10/67 ,  H04B10/673 ,  H04J14/08 ,  H04L7/0075

Abstract: Simultaneous demultiplexing and clock recovery of high-speed (e.g., 80 Gbps or 160 Gbps) optical time division multiplexing (OTDM) signals is achieved using a tandem electro-absorption modulator (TEAM). The TEAM has a monolithically integrated SOA to compensate the insertion loss and two EAMs to reduce the switching window. The demultiplexing and clock recovery may be performed by a single TEAM, or by two or more TEAMs. A fiber Raman amplifier may be used to boost the intensity of the OTDM signals during transmission.

Abstract translation: 使用串联电吸收调制器（TEAM）实现高速（例如，80Gbps或160Gbps）光时分复用（OTDM）信号的同时解复用和时钟恢复。 TEAM具有单片集成的SOA来补偿插入损耗和两个EAM以减少切换窗口。 解复用和时钟恢复可以由单个TEAM或由两个或更多个TEAM执行。 可以使用光纤拉曼放大器来增强传输期间OTDM信号的强度。

公开(公告)号：US20030030039A1

公开(公告)日：2003-02-13

申请号：US10218655

申请日：2002-08-15

Inventor： Takatomo Sasaki ,  Akio Hiraki ,  Yusuke Mori ,  Sadao Nakai

IPC: C01B035/10

CPC classification number: C30B29/22 ,  C30B15/00 ,  C30B17/00 ,  C30B29/10 ,  G02F1/353 ,  G02F1/3551 ,  G02F1/3553 ,  G02F1/37 ,  G02F2201/16

Abstract: The present invention provides a cesium-lithium-borate crystal, which can be used as a high-performance wavelength converting crystal, having a chemical composition expressed as CsLiB6O10, and substituted cesium-lithium-borate crystals expressed by the following formula: Cs1nullxLi1nullyMxnullyB6O10 or Cs2(1nullz)Li2LzB12O20 (where, M is an alkali metal element, and L is an alkali earth metal element); a method for manufacturing same by heating and melting; and an optical apparatus using such crystals.

Abstract translation: 本发明提供一种可用作具有以CsLiB6O10表示的化学组成的高性能波长转换晶体的铯 - 硼酸锂晶体和由下式表示的取代的铯 - 锂 - 硼酸盐晶体：<第lvl段 =“0”> Cs1-xLi1-yMx + yB6O10 <段落lvl =“0”> 或（其中，M为碱金属元素，L为碱土类金属元素） ; 通过加热和熔融制造相同方法; 以及使用这种晶体的光学装置。

公开(公告)号：US20030007730A1

公开(公告)日：2003-01-09

申请号：US10038099

申请日：2001-10-29

Applicant: Aculight Corporation

Inventor： Roy M. Mead ,  Charles I. Miyake

IPC: G02B006/34 ,  G02F001/37

CPC classification number: G02B6/02138 ,  G02B6/02133 ,  G02F1/353 ,  G02F1/37 ,  G02F2001/3507 ,  G02F2001/354 ,  G02F2201/16

Abstract: A wide variety of Fiber Bragg writing devices comprising solid state lasers are provided. The solid state lasers emit moderate peak-power output beams which are suitable for efficient production of fiber Bragg gratings without causing embrittlement of the optical waveguide. These solid state lasers generate output beams with wavelengths of approximately 240 nm, in order to match the primary absorption peak in the ultraviolet range for a typical optical waveguide. In some embodiments, the solid state lasers comprise Ti:sapphire lasers which are tuned to produce fundamental wavelengths which are frequency-multiplied. In other embodiments, the output beam of a Ti:sapphire laser is mixed with a harmonic beam from a pump laser. Some embodiments output the third harmonic of a fundamental beam.

Abstract translation: 提供了包括固态激光器的各种各样的光纤布拉格写入装置。 固态激光器发出中等的峰值功率输出光束，其适合于有效地生产光纤布拉格光栅而不会导致光波导的脆化。 这些固态激光器产生波长为约240nm的输出光束，以便匹配典型光波导的紫外范围内的初级吸收峰。 在一些实施例中，固态激光器包括被调谐以产生倍频的基本波长的Ti：蓝宝石激光器。 在其他实施例中，Ti：蓝宝石激光器的输出光束与来自泵浦激光器的谐波束混合。 一些实施例输出基波束的三次谐波。

公开(公告)号：US20020195622A1

公开(公告)日：2002-12-26

申请号：US10112859

申请日：2002-04-02

Applicant: Mitsubishi Denki Kabushiki Kaisha

Inventor： Eitaro Ishimura

IPC: H01L031/0328

CPC classification number: B82Y20/00 ,  G02F1/01708 ,  G02F2001/0157 ,  G02F2201/16

Abstract: An optical modulator whose cutoff frequency is not halved even in the case of differential driving, as well as a mounting substrate of such an optical modulator and a driving method of such an optical modulator. An optical modulator is configured in such a manner that two EA modulators A and B are connected in series to each other via a transparent waveguide. When voltages are applied to the two EA modulators A and B simultaneously, light that is input from an end face of the optical modulator is absorbed first by the EA modulator A and then by the EA modulator B. Therefore, an extinction ratio that is two times larger than in a conventional optical modulator can be obtained. To prevent pulse superimposition in a modulated light waveform, a line may be made longer than a line so that a drive electrical signal reaches the EA modulator B with a delay. To mount the optical modulator, flip-chip mounting with a coupled coplanar substrate and gold balls or the like may be used.

Abstract translation: 即使在差分驱动的情况下，截止频率也不会减半的光调制器，以及这种光调制器的安装基板和这种光调制器的驱动方法。 光调制器被配置成使得两个EA调制器A和B通过透明波导彼此串联连接。 当电压同时施加到两个EA调制器A和B时，从光调制器的端面输入的光首先被EA调制器A吸收，然后由EA调制器B吸收。因此，消光比为2 可以获得大于常规光学调制器的倍数。 为了防止调制光波形中的脉冲叠加，可以使线路比线路长，使得驱动电信号延迟到达EA调制器B. 为了安装光学调制器，可以使用与耦合的共面基板和金球等的倒装芯片安装。