公开(公告)号：US5223972A

公开(公告)日：1993-06-29

申请号：US708218

申请日：1991-05-31

申请人： Michiyo Nishimura ,  Jun Nitta ,  Kenji Nakamura ,  Masao Majima ,  Tohru Nakata

发明人： Michiyo Nishimura ,  Jun Nitta ,  Kenji Nakamura ,  Masao Majima ,  Tohru Nakata

IPC分类号： G02F1/35 ,  H01S3/23 ,  H01S5/00 ,  H01S5/50

CPC分类号： H01S5/5009 ,  H04B10/2914

摘要： In an optical amplifying apparatus of this invention, there are provided an optical amplifier part for giving a gain to an input light from outside and a selective loss part for giving a light loss of a prescribed ratio for different polarization modes in order to compensate for a polarization dependency of the amplification factor between the input and output lights. Thus, the difference of amplification factors for the different polarization modes is compensated for, as a whole of the apparatus. This polarization non-dependent type optical amplifying apparatus has solved the polarization dependency without degrading other characteristics, so that this can be preferably used in a optical communication system or network. Further, this amplifying apparatus does not require so many external optical components, so this is suitable to the fabrication of a module and is preferably contained in an integrated optical node.

公开(公告)号：US5285059A

公开(公告)日：1994-02-08

申请号：US53309

申请日：1993-04-27

申请人： Tohru Nakata ,  Kenji Nakamura

发明人： Tohru Nakata ,  Kenji Nakamura

IPC分类号： H01S5/0687 ,  H01S5/50 ,  G01J1/32

CPC分类号： H01S5/5045 ,  H01S5/0687

摘要： An apparatus for controlling a tunable filter of the present invention includes a tunable filter, a generating device for generating a reference light whose wavelength is within a transmission wavelength band of the tunable filter, a detecting device for detecting an interaction signal, such as a beat signal, caused by interaction between a desired component of an input light to be input into the tunable filter and the reference light and a controlling device for controlling the tunable filter based on the interaction signal. The controlling device controls a current flow through a wavelength control terminal of the tunable filter such that a center filtering wavelength of the transmission wavelength band of the tunable filter substantially coincides with a wavelength of the desired component.

摘要翻译： 一种用于控制本发明的可调谐滤波器的装置，包括可调滤波器，用于产生其波长在可调滤波器的传输波长带内的参考光的发生装置，用于检测诸如拍子之间的相互作用信号的检测装置 信号，由输入到可调滤波器的输入光的所需分量与参考光之间的相互作用引起，以及用于基于相互作用信号控制可调谐滤波器的控制装置。 控制装置控制通过可调谐滤波器的波长控制端的电流，使得可调谐滤波器的透射波长带的中心滤波波长基本上与期望分量的波长一致。

公开(公告)号：US4552590A

公开(公告)日：1985-11-12

申请号：US522663

申请日：1983-08-12

申请人： Tohru Nakata ,  Hiroyuki Endo ,  Masatoshi Harada ,  Tadao Hayasaka ,  Osamu Miyamoto

发明人： Tohru Nakata ,  Hiroyuki Endo ,  Masatoshi Harada ,  Tadao Hayasaka ,  Osamu Miyamoto

IPC分类号： C22C33/02 ,  B22F5/00 ,  C22C38/00

CPC分类号： C22C33/0278 ,  C22C33/0207 ,  Y10T29/49306 ,  Y10T428/1216 ,  Y10T428/12174

摘要： A ferro-sintered alloy having wear resistance at elevated temperatures comprising a matrix in which, on a weight basis, 25-75% of an alloying base A of the following composition is irregularly dispersed with 75-25% of an alloying base B of the following composition, the matrix having dispersed therein 3-15% of at least one of the following hard phases C and D, and optionally being impregnated in its pores with lead:______________________________________ Base A Base B ______________________________________ Cr 2-4% Co 5.5-7.5% Mo 0.2-0.4% Ni 0.5-3% V 0.2-0.4% Mo 0.5-3% C 0.6-1.2% C 0.6%-1.2% Fe the remainder Fe the remainder Hard phase C: 45-60% Co - 33-36% Mo. - and remainder Si Hard phase D: 45-60% Fe - 33-36% Mo - and remainder Si. ______________________________________

摘要翻译： 在高温下具有耐磨性的铁烧结合金，其包含基体，其中以重量计，25-75％的下列组成的合金基体A与75-25％的下述组成的合金基体B不规则地分散 基体分散有3-15％的以下硬质相C和D中的至少一种，并且任选地用铅浸渍在其孔中：--Base A Base B-Cr 2-4％Co 5.5-7.5 ％-Mo 0.2-0.4％Ni 0.5-3％-V 0.2-0.4％Mo 0.5-3％-C 0.6-1.2％C 0.6％-1.2％Fe剩余部分Fe余量-Hard相C：45-60 ％Co-33-36％Mo-和余量Si-硬质相D：45-60％Fe-33-36％Mo-余量Si-

公开(公告)号：US4422875A

公开(公告)日：1983-12-27

申请号：US237906

申请日：1981-02-25

申请人： Tohru Nakata ,  Hiroyuki Endo ,  Masatoshi Harada ,  Tadao Hayasaka ,  Osamu Miyamoto

发明人： Tohru Nakata ,  Hiroyuki Endo ,  Masatoshi Harada ,  Tadao Hayasaka ,  Osamu Miyamoto

IPC分类号： C22C33/02 ,  B22F5/00

CPC分类号： C22C33/0278 ,  C22C33/0207 ,  Y10T29/49306 ,  Y10T428/1216 ,  Y10T428/12174

摘要： A ferro-sintered alloy having wear-resistance at elevated temperatures, comprises a perlite matrix having a copper content of from 0.2 to 1.5% by weight. 10 to 50% by weight of a phase A rich in heat and corrosion resistance is dispersed in the matrix with phase A including 9 to 20% Cr, 6 to 15% Ni, 1.5 to 9.5% Mo, 1.5 to 9.5% W, 0.7 to 4.5 Cu and an Fe remainder. In addition, 2 to 15% by weight of an additional component is dispersed in the matrix which is selected from one of a group of components which are wear-resistant. The group of components comprises:50.about.70% Mo-Fe Alloy (by weight)50.about.70% Cr-Fe Alloy (by weight)45.about.60% Fe-33.about.36% Mo-Si Alloy (by weight)45.about.60% Co-33.about.36% Mo-Si Alloy (by weight).

摘要翻译： 在高温下具有耐磨性的铁烧结合金包含铜含量为0.2-1.5重量％的珍珠岩基质。 10〜50重量％的耐热耐腐蚀性相A分散在基体中，相A含有9〜20％的Cr，6〜15％的Ni，1.5〜9.5％的Mo，1.5〜9.5％的W，0.7 至4.5 Cu和Fe余量。 另外，将2〜15重量％的附加成分分散在选自耐磨性的一组成分中的基质中。 该组成分包括：50％70％Mo-Fe合金（重量比）50差异70％Cr-Fe合金（重量比）45差异60％Fe-33差异36％Mo-Si合金（重量比）45差异 60％Co-33差异36％Mo-Si合金（重量比）。