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91. 发明专利

JP2004320797A Optical transmission apparatus, optical transmission system and optical terminal station 审中-公开
公开(公告)号：JP2004320797A
公开(公告)日：2004-11-11
申请号：JP2004162393
申请日：2004-05-31
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ONAKA HIROSHI , MIYATA HIDEYUKI , OTSUKA KAZUE , KAI TAKETAKA , NAKAZAWA TADAO , CHIKAMA TERUMI
IPC分类号： H04J14/00 , H04B10/032 , H04B10/035 , H04B10/25 , H04B10/2507 , H04B10/2525 , H04B10/2569 , H04B10/275 , H04B10/291 , H04B10/524 , H04B10/58 , H04J14/02 , H04B10/02 , H04B10/12 , H04B10/13 , H04B10/135 , H04B10/14 , H04B10/18
摘要： PROBLEM TO BE SOLVED: To provide a light wavelength-multiplexed network and apparatus therefor using an AOTF with high reliability and cost performance.
SOLUTION: When configuring an OADM device in an OADM system, an AOTF 10 is used. The AOTF changes a frequency of an RF signal to be applied, to select an arbitrary wavelength. An optical signal of a specific wavelength can be dropped out of wavelength-multiplexed optical signals from an input, or a wavelength-multiplexed signal inputted from an add port can be multiplexed with a through optical signal. In such a case, however, while taking into account that a coherent crosstalk becomes greater, it is realistic to use the AOTF only for dropping in a real apparatus configuration. Otherwise, in the other method, the drop optical signal is branched by a photo-coupler, and a wavelength is selected in a tributor station, so that the wavelength selected in the tributor station can be extracted from the through optical signal by the AOTF.
COPYRIGHT: (C)2005,JPO&NCIPI

92. 发明专利

JP2004319629A Optical module, optical communication device, and optical transmitting/receiving device 有权
公开(公告)号：JP2004319629A
公开(公告)日：2004-11-11
申请号：JP2003109176
申请日：2003-04-14
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： NISHIE MITSUAKI , KUHARA MIKI
IPC分类号： G02B6/42 , H01L31/0232 , H01S5/022 , H01S5/026 , H04B10/00 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
CPC分类号： G02B6/4201 , G02B6/4214 , G02B6/4243 , G02B6/4246 , G02B6/4255 , G02B6/4257 , G02B6/4274 , G02B6/4281 , G02B6/4283 , G02B6/4286 , G02B6/4292
摘要： PROBLEM TO BE SOLVED: To provide an optical module having a structure capable of making assembly efficient.
SOLUTION: The optical module 1 is provided with a first circuit board 3, electronic element 5, semiconductor optical element 7, optical transmission medium 9 and housing 11. The electronic element 5 is mounted on the first circuit board 3. The semiconductor optical element 7 is electrically connected to the electronic element 5. The optical transmission medium 9 is optically coupled with the optical element 7. The housing 11 has a mounting portion 11a, a cavity 11b, supporting portions 11c, 11d, and an opening portion 11e. The mounting portion 11a is used to mount the semiconductor optical element 7. The cavity 11b houses the electronic element 5 and the semiconductor optical element 7. The supporting portions 11c, 11d communicate with the cavity 11b and hold the optical transmission medium 9. The opening portion 11e communicates with the cavity 11b. The first circuit board 3 is provided in the opening 11e portion.
COPYRIGHT: (C)2005,JPO&NCIPI

93. 发明专利

JP2004304708A Photocurrent/voltage conversion circuit 审中-公开
公开(公告)号：JP2004304708A
公开(公告)日：2004-10-28
申请号：JP2003098001
申请日：2003-04-01
申请人： Nec Kansai Ltd , 関西日本電気株式会社
发明人： SHIMIZU AKIFUMI
IPC分类号： H03K17/78 , H03F3/08 , H04B10/07 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/67 , H04B10/69 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To provide a photocurrent/voltage conversion circuit by which linear amplification can be obtained while ensuring the original gain of an amplifier with respect to a normal light input level and the output of the amplifier is not saturated and the speed of response of the whole circuit is not reduced even when the light input level is increased.
SOLUTION: In the photocurrent/voltage conversion circuit, a photocurrent inputted to a photodiode 10 is received by a first amplifier 15 and the saturation of output of the first amplifier 15 is prevented by a subsequent clamp circuit 22. The clamp circuit 22 clamps the output voltage of the first amplifier 15 by connecting the emitter of an NPN transistor 16 to an output terminal 13 of the first amplifier 15, connecting its collector to a power supply line 7 through a first resistor 17, grounding a cathode electrode at one end of a diode array 20 composed of first and second diodes 18 and 19, connecting an anode electrode at its other end to the power supply line 7 through a second resistor 21 and connecting the base of the transistor 16 to a connection point between the diode array 20 and the second resistor 21. In this way, the speed of response of the whole circuit is not reduced and high-speed operations can be maintained. Accordingly, the dynamic range of the light input level of the photocurrent/voltage conversion circuit can be enlarged.
COPYRIGHT: (C)2005,JPO&NCIPI

94. 发明专利

JP3583198B2 Optical communication module 失效
标题翻译：空值
公开(公告)号：JP3583198B2
公开(公告)日：2004-10-27
申请号：JP20425295
申请日：1995-08-10
申请人：富士通株式会社
发明人：智久石川 , 克彦箱守 , 達也西村
IPC分类号： H04B10/40 , H01S5/068 , H04B10/079 , H04B10/272 , H04B10/50 , H04B10/564 , H04B10/60 , H04B10/67 , H04B10/69 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28
CPC分类号： H04B10/40 , H04B10/0795

95. 发明专利

JP3582488B2 Optical receiver, and an optical receiving method 有权
公开(公告)号：JP3582488B2
公开(公告)日：2004-10-27
申请号：JP2000400988
申请日：2000-12-28
申请人：日本電気株式会社
发明人：直行筑間
IPC分类号： H04B10/40 , H04B10/07 , H04B10/2525 , H04B10/50 , H04B10/60 , H04B10/69 , H04J14/00 , H04J14/02 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26 , H04B10/28

96. 发明专利

JP2004294568A Optical interconnection apparatus 审中-公开
公开(公告)号：JP2004294568A
公开(公告)日：2004-10-21
申请号：JP2003083965
申请日：2003-03-26
申请人： National Institute Of Information & Communication Technology , 独立行政法人情報通信研究機構
发明人： NARUSE MAKOTO , ALVARO CASSINELLI
IPC分类号： G02B26/08 , H04B10/25 , H04B10/27 , H04B10/80 , H04B10/02 , H04B10/12 , H04B10/13 , H04B10/135 , H04B10/14
摘要： PROBLEM TO BE SOLVED: To provide an optical interconnection apparatus that can securely make interconnection among many constituent elements between chips or boards under simple control, and has scalability capable of coping with a large scale. SOLUTION: The optical interconnection apparatus 1 is equipped with an input part 2 having input channels 2a, an output part 3 having output channels 3a, and an optical fiber array module 1 having optical fibers 13a connecting channels to each other, and the optical fiber module 1 is divided into (n) groups having optical fibers at least (n) (n: an integer of ≥2) times as many as the input channels 2a, and given (n) topologies between input and output while the groups are made different in style of arrangement style of output ends to input ends of the optical fibers; and one desired topology is selected and input light is outputted to respective channels 3a of the output part 3 after passing through one group of selected optical fibers 13a from the respective channels 2a of the input part 2. COPYRIGHT: (C)2005,JPO&NCIPI

97. 发明专利

JP2004287071A Optical transmitter 有权
公开(公告)号：JP2004287071A
公开(公告)日：2004-10-14
申请号：JP2003078813
申请日：2003-03-20
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： WATANABE KOICHI , KIKUCHI NOBUHIKO
IPC分类号： G02F1/015 , G02F1/01 , H04B10/00 , H04B10/40 , H04B10/50 , H04B10/516 , H04B10/60 , H04B10/61 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/142 , H04B10/152 , H04B10/26 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To form an RZ (Return to Zero) optical signal, an intensity multi-valued optical signal and a phase multi-valued optical signal in a simple configuration and in a miniaturized shape.
SOLUTION: A semiconductor substrate 31 with which two optical modulators 11 and 12 are integrated in series is mounted on a semiconductor substrate 32 with which driving circuits 21 and 22 are integrated. The driving circuits 21 and 22 have emitter follower circuits in their output stages.
COPYRIGHT: (C)2005,JPO&NCIPI

98. 发明专利

JP2004282025A Optical fiber amplifier and its control method 有权
公开(公告)号：JP2004282025A
公开(公告)日：2004-10-07
申请号：JP2003428353
申请日：2003-12-24
申请人： Korea Electronics Telecommun , 韓國電子通信研究院Electronics and Telecommunications Research Institute
发明人： CHANG SUN-HYOK , CHUNG HEE-SANG , HAN JIN-SOO , KIM SEUNG-KWAN , LEE WON-KYOUNG , CHU MOO-JUNG
IPC分类号： G02F1/35 , G02B6/00 , H01S3/06 , H01S3/067 , H01S3/0941 , H01S3/10 , H01S3/13 , H01S3/16 , H01S3/23 , H01S3/30 , H04B10/07 , H04B10/2525 , H04B10/29 , H04B10/293 , H04B10/294 , H04B10/564 , H04B10/572 , H04J14/00 , H04J14/02 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/16 , H04B10/17
CPC分类号： H04B10/296 , H01S3/06758 , H01S3/0941 , H01S3/10015 , H01S3/10069 , H01S3/1301 , H01S3/1305 , H01S3/1608 , H01S3/2375 , H01S3/302 , H01S2301/04 , H04B2210/003
摘要： PROBLEM TO BE SOLVED: To obtain a constant channel distinction output regardless of an input channel number and a fluctuation of an input power by functions of an automatic gain control and an auto-output power level control. SOLUTION: In order to realize AGC(500) and ALC in an optical fiber amplifier comprising three steps of amplifying sections(100, 200, 300), after an input optical power or an input optical power having a specific wave length is monitored to recognize any change of the input optical power by a controller(530), a current value of a pump laser diode(230) compatible with an input is read out from a look up table(540) to drive the pump laser diode(230) so that this current value may be suitable. At this time, a pump power of a first step of amplifying section(100) is set to be constant, and only a pump power of a second step of amplifying section(200) or a third step of amplifying section(300) is adjusted, and an action of the controller(530) is delayed so as to be compatible with a delay time of DCF(210) for Raman amplification of the second step of amplifying section(200). COPYRIGHT: (C)2005,JPO&NCIPI

99. 发明专利

JP2004274109A Optical receiver 有权
公开(公告)号：JP2004274109A
公开(公告)日：2004-09-30
申请号：JP2003058095
申请日：2003-03-05
申请人： Sharp Corp , シャープ株式会社
发明人： SHIMIZU TAKAYUKI , MURATA TAKESHI
IPC分类号： H03F3/08 , G08C19/36 , H01J40/14 , H04B10/07 , H04B10/2507 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/67 , H04B10/69 , H04L25/02 , H04B10/04 , H04B10/02 , H04B10/06 , H04B10/14 , H04B10/18 , H04B10/26 , H04B10/28
CPC分类号： H03F3/087 , H03F3/45475 , H03F2200/78 , H03F2203/45136 , H03F2203/45544 , H03F2203/45664
摘要： PROBLEM TO BE SOLVED: To provide an optical receiver for converting an optical signal into an electric signal and output the converted signal, which can suppress a harmful effect on the output signal due to a parasitic current generated between an photoelectric converting means such as a photodiode and an output.
SOLUTION: A malfunction detecting circuit 2 for monitoring an output signal from a slew rate variable output stage 1 is provided. Upon detecting a malfunction in the output signal, the circuit 2 performs control for reducing a slew rate of an output within a range in which a transmission speed in the output stage 1 is not reduced.
COPYRIGHT: (C)2004,JPO&NCIPI

100. 发明专利

JP3570247B2 Optical transmission system 有权
公开(公告)号：JP3570247B2
公开(公告)日：2004-09-29
申请号：JP29410398
申请日：1998-10-15
申请人： Kddi株式会社
发明人：啓仁田中 , 正敏鈴木
IPC分类号： H04J14/00 , H04B3/04 , H04B10/25 , H04B10/2507 , H04B10/2519 , H04B10/2525 , H04B10/294 , H04J14/02 , H04B10/02 , H04B10/12 , H04B10/13 , H04B10/135 , H04B10/14 , H04B10/18

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