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1. 发明专利

JP2008053555A Wavelength locker 审中-公开
标题翻译：波长锁
公开(公告)号：JP2008053555A
公开(公告)日：2008-03-06
申请号：JP2006229708
申请日：2006-08-25
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAMOTO KENICHI , MORI KAZUYUKI
IPC分类号： H01S5/0687
CPC分类号： H01S5/0687
摘要： PROBLEM TO BE SOLVED: To provide a compact wavelength locker which can be built in a TOSA-type LD module mounted to a compact pluggable module.
SOLUTION: The wavelength locker is provided with a birefringent plate which branches an outgoing light from a light source into two nearly parallel lights, a first photodetection element which photodetects one of the lights branched by the birefringent plate as it is, a λ/4 plate and an etalon filter which the other of the lights branched by the birefringent plate pass through, and a second photodetection element which photodetects the other of the lights having passed through the etalon filter. The λ/4 plate has an optical axis inclined by 45° from the polarization direction of an incident light, and varies the polarization direction of a reflected light reflected by the etalon filter and made incident on itself so as to prevent the reflected light from returning to the light source after passing through the birefringence plate to make the reflected light outgo.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供可安装在紧凑型可插拔模块上的TOSA型LD模块中内置的紧凑型波长锁定器。解决方案：波长锁定器设置有将来自光源的出射光分支成两个近似平行的光的双折射板，第一光电检测元件，其以双折射板原样分光的一个光，一个λ / 4板和由双折射板分支的另一条光通过的标准具过滤器，以及对通过了标准具过滤器的另一个光进行光检测的第二光电检测元件。 λ/ 4板具有从入射光的偏振方向倾斜45°的光轴，并且改变由标准具过滤器反射的反射光的偏振方向并入射到其自身上，以防止反射光返回在通过双折射板之后到达光源以使反射光出射。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2005244038A Optical transmission/reception module 审中-公开
标题翻译：光传输/接收模块
公开(公告)号：JP2005244038A
公开(公告)日：2005-09-08
申请号：JP2004053758
申请日：2004-02-27
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAMOTO KENICHI , AKASHI TAMOTSU , MORI KAZUYUKI , SAKURAMOTO SHINICHI
IPC分类号： G02B6/42 , H01L23/04 , H01L27/14 , H01L27/15 , H01L31/02 , H01L31/0232 , H01R4/02 , H01S5/022 , H01S5/026
CPC分类号： G02B6/4201 , G02B6/4246 , G02B6/4277 , H01L2924/19107 , H01R4/021 , H01R13/6461
摘要： PROBLEM TO BE SOLVED: To eliminate stray capacitance and stray inductance due to the lead pin, case body and internal component of an optical device, such as LD and PD, to suppress the fluctuation of an LD case body (GND) potential generated at high-frequency drive, and to substantially suppress electric crosstalks between transmission and reception in an optical transmission / reception module.
SOLUTION: The optical transmission / reception module comprises an optical transmission module 1, an optical reception module 2, a drive circuit board 3 for driving the optical transmission module 1 and the optical reception module 2, and a short-circuiting means 4 for electrically short-circuiting the case bodies of the respective modules 1 and 2 or electrically short-circuiting the ground (GND) terminals of the respective modules 1 and 2 on the side of the respective modules 1 and 2 to the drive circuit board 3.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了消除由于引脚，壳体和诸如LD和PD的光学器件的内部部件引起的杂散电容和杂散电感，以抑制LD壳体（GND）电位的波动在高频驱动中产生，并且基本上抑制光发送/接收模块中的发送和接收之间的电串扰。光传输/接收模块包括光传输模块1，光接收模块2，用于驱动光传输模块1和光接收模块2的驱动电路板3和短路装置4 用于使各个模块1和2的壳体电气短路，或将各个模块1和2的各个模块1和2的接地（GND）端子电气短路到驱动电路板3。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2009231526A Semiconductor laser control method and semiconductor laser control apparatus 审中-公开
标题翻译：半导体激光器控制方法和半导体激光器控制装置
公开(公告)号：JP2009231526A
公开(公告)日：2009-10-08
申请号：JP2008074955
申请日：2008-03-24
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAMOTO KENICHI
IPC分类号： H01S5/0687
CPC分类号： H01S5/0612 , H01S5/024 , H01S5/02415 , H01S5/0265 , H01S5/0425 , H01S5/0617 , H01S5/06258 , H01S5/0687 , H01S5/12
摘要： PROBLEM TO BE SOLVED: To perform high-speed wavelength switching by speedily stabilizing the wavelength. SOLUTION: A control method includes the steps of: (1) when switching the wavelength of a semiconductor laser, controlling the variation in the wavelength, produced due to the heat generated by wavelength switching in a first time zone, while using a first function for determining a current to be injected into the semiconductor laser; and (2) controlling the variation in the wavelength caused by a temperature adjustment element in a second time zone, while a second function is used for determining a current to be injected into the semiconductor laser. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：通过快速稳定波长来执行高速波长切换。解决方案：控制方法包括以下步骤：（1）当切换半导体激光器的波长时，控制由于在第一时区中由波长切换产生的热量而产生的波长变化，同时使用用于确定要注入半导体激光器的电流的第一功能; 以及（2）控制由第二时间区域中的温度调节元件引起的波长的变化，而第二功能用于确定要注入半导体激光器的电流。版权所有（C）2010，JPO＆INPIT

4. 发明专利

JP2006074214A Optical receiving device 审中-公开
标题翻译：光接收装置
公开(公告)号：JP2006074214A
公开(公告)日：2006-03-16
申请号：JP2004252815
申请日：2004-08-31
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAMOTO KENICHI , IDE SATOSHI , MORI KAZUYUKI , TANAKA HIROMASA
IPC分类号： H04B10/40 , H04B10/07 , H04B10/50 , H04B10/60 , H04B10/67 , H04B10/69
CPC分类号： H03K5/1565 , H03F3/087 , H03F2200/321 , H03F2200/462 , H03F2200/465 , H04B10/66
摘要： PROBLEM TO BE SOLVED: To provide an optical receiving device where a reception characteristic in an optical reception system is improved.
SOLUTION: The device is provided with a photoelectric conversion element 1 receiving an optical signal and performing light/electric conversion and a data detection part 2 detecting data modulated by the optical signal by using an identification level on the optical signal received by the photoelectric conversion element 1. The device is provided with an identification level control part 3 which feed forward-controls the identification level used in the data detection part 2 based on a level of the received optical signal.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：解决的问题：提供光接收系统中的接收特性提高的光接收装置。解决方案：该装置设置有接收光信号并执行光/电转换的光电转换元件1，以及数据检测部分2，通过使用由光信号接收的光信号上的识别电平来检测由光信号调制的数据光电转换元件1.该装置设置有识别电平控制部分3，其基于所接收的光信号的电平向前控制数据检测部分2中使用的识别电平。版权所有（C）2006，JPO＆NCIPI

5. 发明专利

JP2004151227A Gain equalizer, optical amplifier, and optical transmission system 审中-公开
公开(公告)号：JP2004151227A
公开(公告)日：2004-05-27
申请号：JP2002314514
申请日：2002-10-29
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAMOTO KENICHI , YOSHIDA SADAO
IPC分类号： G02F1/01
CPC分类号： H04B10/2941
摘要： PROBLEM TO BE SOLVED: To provide a gain equalizing technique with which the wavelength characteristics of the light are efficiently compensated with high accuracy by combining a plurality of periodic filters. SOLUTION: The gain equalizer 1a has loss wavelength characteristics exhibiting single wave increasing or decreasing with respect to the wavelength region for compensation and is equipped with a first compensating part 11 to compensate the linear gain component of the wavelength characteristics in the wavelength region for compensation and a second compensating part 12 to compensate the wavelength characteristics in the wavelength region for compensation not compensated in the first compensating part 11 with an optical filter 12A consisting of a plurality of the combined periodic filters cascade connected to the first compensating part 11. COPYRIGHT: (C)2004,JPO

6. 发明专利

JP2009081512A Optical transmitting apparatus, and setting-value determining method 审中-公开
标题翻译：光传输装置和设定值确定方法
公开(公告)号：JP2009081512A
公开(公告)日：2009-04-16
申请号：JP2007247351
申请日：2007-09-25
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAMOTO KENICHI
IPC分类号： H04B10/516 , G02F1/01 , H04B10/07 , H04B10/524 , H04B10/572 , H04B10/61 , H04J14/00 , H04J14/02
CPC分类号： H04B10/572 , H01S5/06832 , H01S5/0687
摘要： PROBLEM TO BE SOLVED: To improve transmission characteristics during wavelength control by adjusting at least one of a setting value of an EA bias input to an electric field absorption type modulator and a setting value of EA temperature of an electric field absorption type modulator according to a wavelength. SOLUTION: In an optical transmitting apparatus, a wavelength-variable light source 110 generates light having a wavelength corresponding to an input wavelength control current. An EA modulator 120 modulates light generated by the wavelength-variable light source 110, on the basis of a modulation characteristic corresponding to an input EA bias. A TEC 130 changes the temperature of the wavelength-variable light source 110 and that of the EA modulator 120 according to an input temperature control current. A control unit 150 adjusts the setting-value of the wavelength control current input to the wavelength-variable light source 110, the setting-value of the EA bias input to the EA modulator 120, and the setting-value of the temperature of the EA modulator 120 according to input wavelength information. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了通过调整输入到电场吸收型调制器的EA偏置的设定值和电场吸收型调制器的EA温度的设定值中的至少一个来改善波长控制期间的透射特性根据波长。解决方案：在光发射装置中，波长可变光源110产生具有与输入波长控制电流相对应的波长的光。 EA调制器120基于与输入EA偏置相对应的调制特性来调制由波长可变光源110产生的光。 TEC 130根据输入温度控制电流改变波长可变光源110和EA调制器120的温度。控制单元150调节输入到波长可变光源110的波长控制电流的设定值，输入到EA调制器120的EA偏置的设定值和EA的温度设定值调制器120根据输入波长信息。版权所有（C）2009，JPO＆INPIT

7. 发明专利

JP2008042493A Optical receiving circuit and its identification level control method 有权
标题翻译：光接收电路及其识别电平控制方法
公开(公告)号：JP2008042493A
公开(公告)日：2008-02-21
申请号：JP2006213649
申请日：2006-08-04
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAMOTO KENICHI , IDE SATOSHI
IPC分类号： H04B10/40 , H03G11/00 , H04B10/07 , H04B10/2513 , H04B10/50 , H04B10/524 , H04B10/58 , H04B10/60 , H04B10/66
CPC分类号： H04B10/697 , H04B10/693
摘要： PROBLEM TO BE SOLVED: To provide an optical receiving circuit capable of restraining a deterioration in receiving sensitivity due to a transmission waveform impairment caused by wavelength dispersion. SOLUTION: The optical receiving circuit includes a photoelectric converter 10 which converts the received light into electric signals, a preamplifier 20 which amplifies the above electric signals, a main amplifier 50 which amplifies the output of the preamplifier 20, a monitoring unit 30 which monitors the output of the preamplifier 20, and a control unit 40 which controls the identification level of the main amplifier 50 on the basis of the output of the monitoring unit 30. The monitoring unit 30 is configured so as to be equipped with a limiter amplifier 31 which amplifies the output of the preamplifier 20, and an average value detecting circuit 32 which detects the temporal average value of the output amplitude of the limiter amplifier 31. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种光接收电路，其能够抑制由于由波长色散引起的透射波形损害而导致的接收灵敏度的劣化。光接收电路包括将接收到的光转换为电信号的光电转换器10，放大上述电信号的前置放大器20，放大前置放大器20的输出的主放大器50，监视单元30 其监视前置放大器20的输出，以及控制单元40，其根据监视单元30的输出来控制主放大器50的识别电平。监视单元30被配置为配备限制器放大前置放大器20的输出的放大器31，以及检测限幅放大器31的输出幅度的时间平均值的平均值检测电路32.（C）2008，JPO＆INPIT

8. 发明专利

JP2004229243A Mach-zehnder interferometer type optical filter and control method thereof 审中-公开
公开(公告)号：JP2004229243A
公开(公告)日：2004-08-12
申请号：JP2003018051
申请日：2003-01-27
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NAKAMOTO KENICHI , YOSHIDA SADAO , ONAKA HIROSHI
IPC分类号： G02B6/12 , G02B6/34 , G02F1/01 , H04B10/07 , H04B10/29 , H04B10/294 , H04J14/00 , H04J14/02 , H04B10/16 , H04B10/17
CPC分类号： G02B6/29355 , G02B6/29395 , H04B10/25073 , H04B2210/003
摘要： PROBLEM TO BE SOLVED: To solve the problem that the filter average insertion loss is fluctuated when controlling the filter extinction ratio in a Mach-Zehnder interferometer type optical filter. SOLUTION: In the optical filter configured by serially connecting three Mach-Zehnder interferometers, the amount of a change in the optical path to be assigned to two optical path change units 11 and 12 to control the filter extinction ratio of the optical filter is set on the basis of an equation indicating the relationship among the filter average insertion loss, the filter extinction ratio of the optical filter, and the amount of a change in the optical path given to the two optical path change units. COPYRIGHT: (C)2004,JPO&NCIPI

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