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1. 发明专利

JP2007052465A Optical waveguide device and optical device 有权
标题翻译：光波器件和光学器件
公开(公告)号：JP2007052465A
公开(公告)日：2007-03-01
申请号：JP2006319552
申请日：2006-11-28
申请人： Fujitsu Ltd , 富士通株式会社
发明人： DOI MASAHARU , SUGIYAMA MASAKI , NAKAZAWA TADAO
IPC分类号： G02F1/035
摘要： PROBLEM TO BE SOLVED: To broaden the width of selection of components that can be employed as optical detecting sections, to exactly and surely detect monitor light, and to obtain monitor light of appropriate intensity for use in bias control. SOLUTION: The optical device constituted by forming a Mach-Zehnder interferometer 3 equipped with first and second two optical waveguides on an output side on a substrate having an electrooptical effect, includes a curve to turn the second optical waveguide 3f to a direction parting from the first optical waveguide 3e and includes a monitor section 10 in a position shifted from the output end of the second optical waveguide having the curve. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了扩大可以用作光学检测部件的部件的选择宽度，以准确且可靠地检测监视光，并且获得用于偏置控制的适当强度的监视光。解决方案：通过在具有电光效应的基板的输出侧上形成装备有第一和第二两个光波导的马赫 - 策德尔干涉仪3构成的光学装置包括将第二光波导3f转向方向从第一光波导3e分离，并且包括从具有曲线的第二光波导的输出端偏移的位置的监视部10。版权所有（C）2007，JPO＆INPIT

2. 发明专利

JP2006019516A Tunable laser and its control method 审中-公开
标题翻译：可控激光及其控制方法
公开(公告)号：JP2006019516A
公开(公告)日：2006-01-19
申请号：JP2004195879
申请日：2004-07-01
申请人： Fujitsu Ltd , 富士通株式会社
发明人： TAKABAYASHI KAZUMASA , NAKAZAWA TADAO , SHIRAISHI TAKASHI
IPC分类号： H01S5/14 , H01S5/50
CPC分类号： H01S3/106 , H01S5/141
摘要： PROBLEM TO BE SOLVED: To provide a tunable laser that emits stable laser beams of required oscillation wavelength and has a good noise characteristic.
SOLUTION: A resonator 11 is composed of a set of oppositely positioned mirror reflectors; and a tunable laser in the resonator 11 consists of an SOA 3 which gets gains in a wide wavelength and emits laser beams, a transparent tunable wavelength filter 4 with an asynchronous filter characteristic, and a phase controller 5 which controls laser beam phases within the resonator 11.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供发射所需振荡波长的稳定的激光束并具有良好的噪声特性的可调激光器。解决方案：谐振器11由一组相对定位的反射镜组成; 并且谐振器11中的可调谐激光器包括获得宽波长增益并发射激光束的SOA 3，具有异步滤波器特性的透明可调谐波长滤波器4以及控制谐振器内的激光束相位的相位控制器5 11.版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2005128184A Optical device module 有权
标题翻译：光学器件模块
公开(公告)号：JP2005128184A
公开(公告)日：2005-05-19
申请号：JP2003362530
申请日：2003-10-22
申请人： Fujitsu Ltd , 富士通株式会社
发明人： OIKAWA YOICHI , AOTA HIROSHI , AKIMOTO KAZUAKI , MIYATA HIDEYUKI , NAKAZAWA TADAO
IPC分类号： G02B6/12 , G02B7/00 , G02F1/11 , G02F1/125
CPC分类号： G02B7/008 , G02F1/116 , G02F2203/60
摘要： PROBLEM TO BE SOLVED: To provide an optical device module making capable of inexpensively uniformizing the temperature of an optical device as a whole, capable of being very easily fabricated and easily adaptible to increase of capacity of the optical device. SOLUTION: The optical device module includes a waveguide type optical device (an optical filter (AOTF)) 202 as the optical device, a soaking unit 12 fixed to the optical filter (AOTF) 202 and capable of transmitting necessary temperature, a heating unit 14 as a temperature controlling part fixed to the soaking unit and emitting necessary temperature to heat the soaking unit 12, a plurality of heat-insulating units 22 fixed to the heating unit 14 and having spatial regions 24 for air-insulation at necessary intervals as insulating means giving insulation influence to the temperature emitted by the heating unit 14 in necessary positions and a package 18 that houses the optical filter (AOTF) 202, the soaking unit 12, the heating unit 14, and the plurality of heat-insulating units 22 and to which the plurality of heat-insulating units 22 are fixed. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供能够使光学装置的整体的温度廉价均匀化的光学装置模块，能够容易地制造并且容易适应于增加光学装置的容量。解决方案：光学器件模块包括作为光学器件的波导型光学器件（光学滤波器（AOTF））202，固定到滤光器（AOTF）202并且能够传送所需温度的均热单元12，加热单元14作为温度控制部分固定到均热单元并发出必要温度以加热均热单元12;多个绝热单元22，固定到加热单元14并具有空间区域24，用于以必要的间隔进行空气绝缘作为对由加热单元14在必要位置发出的温度产生绝缘影响的绝缘装置和容纳滤光器（AOTF）202，均热单元12，加热单元14和多个绝热单元的封装18 22，并且多个绝热单元22被固定到该隔热单元22。版权所有（C）2005，JPO＆NCIPI

4. 发明专利

JP2005093498A Tunable laser 有权
标题翻译：柔性激光
公开(公告)号：JP2005093498A
公开(公告)日：2005-04-07
申请号：JP2003321091
申请日：2003-09-12
申请人： Fujitsu Ltd , 富士通株式会社
发明人： TAKABAYASHI KAZUMASA , MORITO TAKESHI , TAKADA MIKI , NAKAZAWA TADAO
IPC分类号： H01S3/106 , H01S5/026 , H01S5/06
摘要： PROBLEM TO BE SOLVED: To provide a tunable laser which can be quickly tuned to a desired wavelength.
SOLUTION: The tunable laser is equipped with a first tunable optical filter 22A which selects a desired wavelength, and a second optical filter 22B which contains a plurality of characteristic wavelengths and has comb-shaped properties. The tunable laser oscillates in a wavelength which is selected by the first optical filter 22A from the characteristic wavelengths possessed by the second optical filter 22B. Furthermore, a phase control means 22E which controls the phase of light, and a light isolating means 22D which isolates selected light and non-selected light outputted from the first optical filter 22A from each other, are provided to the tunable laser. Moreover, the selected wavelength of light is controlled so as to maximize the ratio of signals outputted from the first photodetector to signals outputted from the second photodetector by the use of a first photodetector 23A monitoring an optical output, a second photodetector 23B monitoring non-selected light, and a control system 24 which controls the selected wavelength of the first optical filter 22A and controls the phase control means 22E, and an optical phase is controlled independently of the optical filters so as to maximize the output of the tunable laser.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供可以快速调谐到期望波长的可调谐激光器。
解决方案：可调激光器配备有选择期望波长的第一可调谐滤光器22A和包含多个特征波长并具有梳状特性的第二滤光器22B。可调谐激光器以由第二滤光器22B所具有的特征波长由第一滤光器22A选择的波长振荡。此外，将可控激光器设置为控制相位相位的相位控制装置22E和将从第一滤光器22A输出的所选择的光和非选择光彼此隔离的光隔离装置22D。此外，控制所选择的光波长，以便通过使用监视光输出的第一光电检测器23A来最大化从第一光电检测器输出的信号与从第二光电检测器输出的信号的比率;监视未选择的第二光电检测器23B 光和控制系统24，其控制第一滤光器22A的选定波长并控制相位控制装置22E，并且独立于滤光器来控制光相位，以便使可调激光器的输出最大化。版权所有（C）2005，JPO＆NCIPI

5. 发明专利

JP2004219589A Light filter 有权
标题翻译：光学过滤器
公开(公告)号：JP2004219589A
公开(公告)日：2004-08-05
申请号：JP2003005098
申请日：2003-01-10
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAZAWA TADAO
IPC分类号： G02F1/125
摘要： PROBLEM TO BE SOLVED: To provide an acousto-optic tunable filter (ATOF) with which selected wavelength characteristics of TE light and TM light coincide with each other even when travelling directions of SAWs propagated through SAW waveguides are opposite to each other so as to align shift directions of optical frequency Doppler shifts. SOLUTION: The propagation velocity of the SAW, propagated in the same direction as a direction of light propagated through an optical waveguide, is made slower than that of the SAW, propagated in the direction opposite to the direction of the light propagated through the optical waveguide, and consequently selected wavelengths of both waveguides are made identical to each other to thereby prevent the occurrence of PDL. The propagation velocity of the SAW is varied by variations in the waveguide widths of the SAW waveguides, film thickness, a pattern of formation, a concentration of an added metal oxide, etc., of a thin film constituting the SAW waveguides. COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：要解决的问题：即使当通过SAW波导传播的SAW的行进方向彼此相反时，提供TE光和TM光的所选波长特性彼此一致的声光可调滤波器（ATOF），所以以便对准光频多普勒频移的移位方向。解决方案：SAW传播的方向与通过光波导传播的光的方向相同的传播速度比SAW传播速度慢，传播速度沿与传播通过的光的方向相反的方向传播光波导和因此使两个波导的所选波长彼此相同，从而防止PDL的发生。 SAW的传播速度由构成SAW波导的薄膜的SAW波导的波导宽度的变化，膜厚度，形成方式，添加的金属氧化物的浓度等的变化而变化。版权所有（C）2004，JPO＆NCIPI

6. 发明专利

JP2004079601A Wavelength variable laser enabling high-speed control of wavelength 有权
公开(公告)号：JP2004079601A
公开(公告)日：2004-03-11
申请号：JP2002234462
申请日：2002-08-12
申请人： Fujitsu Ltd , 富士通株式会社
发明人： TAKABAYASHI KAZUMASA , MORITO TAKESHI , HASHIMOTO NAOKI , NAKAZAWA TADAO
IPC分类号： H01S3/106 , H01S5/06 , H01S5/14
摘要： PROBLEM TO BE SOLVED: To provide a wavelength variable laser enabling stable wavelength selection by accurately controlling the frequency of an RF signal of acoustic optical filter.
SOLUTION: The wavelength variable laser having a resonator formed with two reflection faces is provided with a gain medium for generating a laser beam; a first filter generating a surface acoustic wave to a light guide by applying the RF signal and selectively transmitting light of a frequency region corresponding to the frequency of the RF signal; and a second filter having a cyclic transmissive frequency region in the resonator. The laser has a frequency control means for controlling the frequency of the RF signal in response to the size of a beat signal having the frequency of N times (N is an integer including 1) of the RF signal included in output light output from the resonator. Since the beat signal of the output light is the minimum when controlled into the optimum RF signal frequency, control of the frequency of the RF signal corresponding to a desired frequency can be accurately performed.
COPYRIGHT: (C)2004,JPO

7. 发明专利

JP2004020780A Optical modulator 有权
公开(公告)号：JP2004020780A
公开(公告)日：2004-01-22
申请号：JP2002173980
申请日：2002-06-14
申请人： Fujitsu Ltd , 富士通株式会社
发明人： SUGIYAMA MASAKI , NAKAZAWA TADAO
IPC分类号： G02F1/035
CPC分类号： G02F1/0356
摘要： PROBLEM TO BE SOLVED: To provide a configuration for an optical modulator capable of maintaining characteristic impedance and obtaining wide band characteristic. SOLUTION: The optical modulator is provided with a base plate having an electrooptic effect, an optical waveguide formed on the surface of the base plate and a signal electrode 20 and ground electrodes 21 and 22 formed near the optical waveguide. The signal electrode and the ground electrodes have a relative action part and a pull-out part, and a groove 100 is formed between the signal electrode and the ground electrodes existing in the area of the pull-out part. COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2003262841A OPTICAL MODULATOR AND DESIGNING METHOD 审中-公开
公开(公告)号：JP2003262841A
公开(公告)日：2003-09-19
申请号：JP2002062095
申请日：2002-03-07
申请人： FUJITSU LTD
发明人： SUGIYAMA MASAKI , NAKAZAWA TADAO
IPC分类号： G02F1/035 , G02F1/03 , G02F1/225
摘要： PROBLEM TO BE SOLVED: To improve the speed and performance of an optical modulator by securing a modulation band and reducing driving voltage. SOLUTION: The optical modulator comprises: an optical waveguide 11 formed on a crystal substrate having an electro-optic effect; a signal electrode 12 formed in the neighborhood of the optical waveguide 11; and a ground electrode 13 formed on both sides of the signal electrode 12. The range of the characteristic impedance 20 of the signal electrode 12 is fixed so that the reflection of microwaves may be equal to or smaller than a fixed value. When the phases of light and the microwaves match with each other, 40 Gb/s or more optical modulation is performed with a gap of 50 μm or more between the signal electrode 12 and the ground electrode 13 and with 50 mm or more working length L of the signal electrode 12. COPYRIGHT: (C)2003,JPO

9. 发明专利

JP2001228451A MANUFACTURING METHOD OF ACOUSTOOPTICAL TUNABLE FILTER 失效
公开(公告)号：JP2001228451A
公开(公告)日：2001-08-24
申请号：JP2000040792
申请日：2000-02-18
申请人： FUJITSU LTD
发明人： SUGIYAMA MASAKI , NAKAZAWA TADAO , KIYONO MINORU
IPC分类号： G02F1/125 , G02F1/335
摘要： PROBLEM TO BE SOLVED: To obtain an acoustooptical tunable filter(AOTF) of good characteristics easily by the manufacturing method of the AOTF. SOLUTION: The manufacturing method of the AOTF includes a step for forming a waveguide structure 4 of light and a waveguide structure 6 of a surface acoustic wave on a substrate 2, and a step for re-forming the waveguide structure of the surface acoustic wave. The re-formed step includes a step for forming a thin film 24 near the waveguide structure of light and the waveguide structure of the surface acoustic wave, and a step for etching the thin film.

10. 发明专利

JPH03253815A OPTICAL WAVEGUIDE DEVICE 失效
公开(公告)号：JPH03253815A
公开(公告)日：1991-11-12
申请号：JP5202290
申请日：1990-03-02
申请人： FUJITSU LTD
发明人： KIYONO MINORU , MEGATA NAOYUKI , NAKAZAWA TADAO , KUBOTA YOSHINOBU , DOI MASAHARU
IPC分类号： G02B6/12 , G02F1/035 , G02F1/21 , G02F1/225
摘要： PURPOSE:To suppress and compensate a DC drift effectively by varying the distribution of an electric field, applied to and nearby an optical waveguide by a couple of a signal and a grounding driving electrode, greatly by the variation of the frequency of an electric signal. CONSTITUTION:The optical waveguide 2 is formed on the surface of an electrooptic crystal substrate 1 and the couple of driving electrodes 5 and 6 for a signal and for driving are formed on the optical waveguide 2. The distribution of the electric field applied to and nearby the optical waveguide 2 by the electrodes 5 and 6 is varied greatly by the variation of frequency of the electric signal applied to the electrodes 5 and 6. Namely, large variation in the effective shapes of the electrodes 5 and 6 between a high and a low frequency is utilized. Consequently, the DC drift can be suppressed and operation characteristic variation due to the DC drift or stress can be compensated effectively.

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