公开(公告)号：EP2639630A1

公开(公告)日：2013-09-18

申请号：EP13171823.1

申请日：2011-03-23

Applicant: Fujitsu Optical Components Limited

Inventor： Sugiyama, Masaki

IPC: G02F1/035 ,  G02F1/313 ,  G02B6/122 ,  G02B6/125

CPC classification number: G02F1/035 ,  G02F1/2255 ,  G02F1/3132 ,  G02F1/3137

Abstract: An optical waveguide formed in an electro-optical substrate includes a curved waveguide (11) having a first end and a second end and a branch portion (12) that is coupled to the second end of the curved waveguide , wherein the curved waveguide (11) comprises a low refraction index portion (18) having an effective refraction index that is lower than that of the rest of the curved waveguide, the low refraction index portion (18) being provided between the first end and the second end of the curved waveguide (11).

Abstract translation: 形成在电光基板中的光波导包括具有第一端和第二端的弯曲波导（11）和耦合到弯曲波导的第二端的分支部（12），其中弯曲波导（11） ）包括具有低于弯曲波导的其余部分的有效折射率的低折射率部分（18），低折射率部分（18）设置在弯曲波导的第一端和第二端之间 （11）。

公开(公告)号：EP1705515B1

公开(公告)日：2013-08-28

申请号：EP06014368.2

申请日：2004-01-30

Applicant: FUJITSU LIMITED

Inventor： Sugiyama, Masaki ,  Nakazawa, Tadao

IPC: G02B6/122 ,  G02B6/134 ,  G02B6/42 ,  G02B6/12 ,  G02F1/225 ,  G02B6/125

CPC classification number: G02F1/2255 ,  G02B6/12007 ,  G02B6/1228 ,  G02B6/125 ,  G02B6/1342 ,  G02B6/32 ,  G02B6/322 ,  G02B6/4206 ,  G02B6/4214 ,  G02B2006/12097 ,  G02B2006/12119 ,  G02B2006/12142 ,  G02F2201/063

公开(公告)号：EP2485076A1

公开(公告)日：2012-08-08

申请号：EP10820456.1

申请日：2010-09-24

Applicant: Sumitomo Osaka Cement Co., Ltd.

Inventor： OKAMURA Miki ,  SHIMIZU Ryo ,  ISHIKAWA Yasuhiro

IPC: G02B6/122 ,  G02B6/12 ,  G02F1/035

CPC classification number: G02B6/125 ,  G02B6/2713 ,  G02B6/2773 ,  G02B2006/12142 ,  G02F1/2255

Abstract: Provided is a small optical waveguide device with little reflected light, the optical waveguide device including: an optical waveguide element of which a first output waveguide is inclined with respect to an output end face and a second output waveguide is inclined with respect to both the first output waveguide and the output end face; and a lens that allows beams respectively output from the first and second output waveguides to be parallel to each other.

Abstract translation: 本发明提供一种反射光少的小型光波导装置，该光波导装置包括：第一输出波导相对于输出端面倾斜的光波导元件，第二输出波导相对于第一输出波导倾斜， 输出波导和输出端面; 以及允许分别从第一和第二输出波导输出的光束彼此平行的透镜。

公开(公告)号：EP1921485B1

公开(公告)日：2012-08-08

申请号：EP06797071.5

申请日：2006-08-30

Applicant: National Institute of Information and Communications Technology, Incorporated Administrative Agency

Inventor： KAWANISHI, Tetsuya, c/o National Inst. of Inf. and Com. Tech. ,  IZUTSU, Masayuki ,  SAKAMOTO, Takahide ,  TSUCHIYA, Masahiro

IPC: G02F1/03 ,  G02F1/035 ,  H04B10/04 ,  H04B10/06 ,  H04B10/142 ,  H04B10/152

CPC classification number: G02F1/0327 ,  G02F1/2255 ,  G02F2001/212

Abstract: A DSB-SC system in which the tertiary component is suppressed. IN a DSB-SC modulating system (1) of a first aspect, a third harmonic signal generating section (17) generates an electric signal (3fm) having a frequency which is three times the frequency of a fundamental signal (fm), a phase adjusting section (18) adjusts the difference between the phases of the fundamental signal (fm) and an electric signal (3fm) having a frequency which is three times the frequency of the fundamental signal, and a signal intensity adjusting section (19) adjusts the intensity of the electric signal (3fm). As a modulating signal, the signal having a frequency 3fm is adjusted so that the phase of the primary component (f0±3fm) may be opposite to that of the tertiary component (f0±3fm) generated when a signal of fm is applied as a modulating signal and that the intensity of the primary component (f0±3fm) may be approximately equal to that of the tertiary component (f0±3fm). Therefore, they suppress each other, and DSB-SC modulation having a high extinction ratio can be achieved.

公开(公告)号：EP2131230A4

公开(公告)日：2012-07-25

申请号：EP07739861

申请日：2007-03-27

Applicant: FUJITSU LTD

Inventor： SHIRAISHI TAKASHI

IPC: G02F1/225

CPC classification number: G02F1/2255 ,  G02F2001/212 ,  G02F2201/14 ,  G02F2202/07 ,  G02F2203/21

Abstract: [Problem] An optical device compensates temperature drift by compensating a refractive index deviation caused by generation of stress irrespective of the position of the waveguide on the substrate. The optical device includes a substrate (2) having an electrooptic effect; a plurality of optical waveguides (3b-1 and 3b-2) disposed over the substrate (2) in parallel to one another; and a polarization inversion region (6) which is disposed a part of the substrate (2) and which has a polarization characteristic that is an inverse to that of the substrate (2), wherein a profile of a boundary between the polarization inversion region (6) and a remaining region (7) in which the polarization is not inverted is configured such that accumulated amounts of distortion that affects the respective waveguides (3b-1 and 3b-2) over coordinates along a light propagation direction are substantially identical.

Abstract translation: [问题]光学器件通过补偿由于产生应力引起的折射率偏差来补偿温度漂移，而与基板上的波导的位置无关。 光学器件包括具有电光效应的衬底（2） 设置在所述基板（2）上方的彼此平行的多个光波导（3b-1和3b-2） 以及偏振反转区域（6），其设置在所述基板（2）的一部分上，并具有与所述基板（2）的偏振特性相反的偏振特性，其中，所述偏振反转区域 6）和其中偏振不反转的剩余区域（7）被配置为使得沿着光传播方向在坐标上影响各个波导（3b-1和3b-2）的累积的失真量基本相同。

公开(公告)号：EP2359187A1

公开(公告)日：2011-08-24

申请号：EP09833821.3

申请日：2009-12-15

Applicant: Cogo Optronics, Inc. ,  Fraunhofer Gesellschaft e.V.

Inventor： PROSYK, Kelvin ,  KAISER, Ronald ,  VELTHAUS, Karl-Otto

IPC: G02F1/35 ,  G02B6/02

CPC classification number: G02B6/136 ,  G02B6/1228 ,  G02B6/305 ,  G02B2006/12035 ,  G02F1/2255 ,  G02F2001/212

Abstract: A monolithic optoelectronic device has a spot-size converter optically connected to a waveguide. The overclad (58) extending over the core (54) of the waveguide is thinner and more highly doped than the overclad of the spot-size converter. This structure can be made by applying a process of selective etching and enhanced regrowth to create selective regions of the overclad (58) of different thickness or doping.

Abstract translation: 单片光电子器件具有光学连接到波导的点尺寸转换器。 在波导核心上延伸的外包层更薄且更高掺杂，使得光斑尺寸转换器的外包层。 可以通过应用选择性蚀刻和增强的再生长过程来产生不同厚度或掺杂的外包层的选择性区域来制备该结构。

公开(公告)号：EP2333915A1

公开(公告)日：2011-06-15

申请号：EP09811016.6

申请日：2009-08-03

Applicant: ZTE Corporation

Inventor： SHEN, Jianqing

IPC: H01S5/0683 ,  H01S5/026 ,  H01S3/10 ,  H01S3/13 ,  G02F1/35 ,  H04B10/12

CPC classification number: H04B10/50575 ,  G02F1/0123 ,  G02F1/0327 ,  G02F1/2255 ,  G02F2203/21

Abstract: The present invention discloses a method and device for the bias control of a laser modulator. The method comprises: during startup of a laser modulator, inputting a linearly changing bias control voltage to the bias electrode of the laser modulator and obtaining the output optical power of the laser modulator so as to determine a bias control voltage corresponding to a preset operating point; then enabling a communication electrical signal to be input to the radio frequency electrode of the laser modulator, carrying out an amplitude modulation on the communication electrical signal by a low-frequency sinusoidal pilot signal, and inputting the determined bias control voltage to the bias electrode simultaneously; and sampling the output optical signals of the laser modulator, comparing the sampled optical signal with the pilot signal, and adjusting the bias control voltage input to the bias electrode according to the result of the comparison.

Abstract translation: 本发明公开了一种用于激光调制器的偏置控制的方法和设备。 该方法包括：在激光调制器启动时，向激光调制器的偏置电极输入线性变化的偏置控制电压，并获取激光调制器的输出光功率，以确定与预设工作点对应的偏置控制电压 ; 然后使通信电信号输入到激光调制器的射频电极，通过低频正弦导频信号对通信电信号进行幅度调制，并将确定的偏压控制电压同时输入到偏压电极 ; 以及对激光调制器的输出光信号进行采样，将采样的光信号与导频信号进行比较，并根据比较结果调整输入到偏压电极​​的偏压控制电压。

公开(公告)号：EP2324390A1

公开(公告)日：2011-05-25

申请号：EP08876051.7

申请日：2008-09-18

Applicant: Selex Sistemi Integrati S.p.A.

Inventor： PIERNO, Luigi ,  VARASI, Mauro

IPC: G02F2/02 ,  G01S7/40 ,  G01S13/76 ,  H01Q3/26 ,  H04B10/155

CPC classification number: G02F2/02 ,  G01S7/4052 ,  G01S13/767 ,  G01S2007/4095 ,  G02F1/2255 ,  H01Q3/267 ,  H01Q3/2676

Abstract: The invention concerns an optical modulator, comprising an input suitable to receive an optical carrier, a high- frequency microwave input and an output suitable to transmit an optical signal, the optical modulator comprising two Mach-Zender (1,2) modulators in parallel between the input and output so as to constitute two different optical paths within a third Mach-Zender modulator (3), the optical modulator being characterised in that: - the first Mach-Zender modulator (1) is provided with an electrode suitable to apply two microwave signals (RFl, RF2) obtained by the sum of the two tones fR and fD of equal power, the signals being dephased by pi/2, the modulator (1) being further provided with an electrode (Bias 1) for realising a single side band modulation of the tones fR and fp; - the second Mach-Zender modulator (2) is provided with an electrode (Bias 2) to vary the phase and the amplitude of the optical carrier; the third Mach-Zender modulator (3) comprises an electrode • (Bias 3) suitable to realise the summation of the signals deriving from the first (1) and the second (2) Mach-Zender modulator before the output, so as to suppress the optical carrier and thus obtain only the tones fR and fo in the optical spectrum. The invention further concerns an optical generator of Doppler frequency, an optical link for the generation of a variable optical delay and a transponder, in particular for the calibration, the test and the performances test of a radar, in particular a phased-array radar, that uses the optical modulator according to the invention.

公开(公告)号：EP1708018B1

公开(公告)日：2009-12-23

申请号：EP06011544.1

申请日：2003-06-03

Applicant: Panasonic Corporation

Inventor： Enokihara, Akira ,  Kosaki, Masahiro Matsushita Electric Ind. Co. Ltd. ,  Yajima, Hiroyoshi c/o Matsushita Elec.Ind. Co.Ltd.

IPC: G02F1/225 ,  G02F1/035 ,  G02F1/21

CPC classification number: G02F1/0356 ,  G02F1/2255 ,  G02F2001/212

公开(公告)号：EP2131230A1

公开(公告)日：2009-12-09

申请号：EP07739861.8

申请日：2007-03-27

Applicant: Fujitsu Limited

Inventor： SHIRAISHI, Takashi

IPC: G02F1/035

CPC classification number: G02F1/2255 ,  G02F2001/212 ,  G02F2201/14 ,  G02F2202/07 ,  G02F2203/21

Abstract: [Problem] An optical device compensates temperature drift by compensating a refractive index deviation caused by generation of stress irrespective of the position of the waveguide on the substrate. The optical device includes a substrate (2) having an electrooptic effect; a plurality of optical waveguides (3b-1 and 3b-2) disposed over the substrate (2) in parallel to one another; and a polarization inversion region (6) which is disposed a part of the substrate (2) and which has a polarization characteristic that is an inverse to that of the substrate (2), wherein a profile of a boundary between the polarization inversion region (6) and a remaining region (7) in which the polarization is not inverted is configured such that accumulated amounts of distortion that affects the respective waveguides (3b-1 and 3b-2) over coordinates along a light propagation direction are substantially identical.