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1. 发明专利

CA2311725A1 FIBER GRATING, ITS MANUFACTURING METHOD AND ITS MANUFACTURING DEVICE 未知
公开(公告)号：CA2311725A1
公开(公告)日：1999-06-03
申请号：CA2311725
申请日：1998-11-25
申请人： MITSUBISHI CABLE IND LTD
发明人： SUDO YASUHIDE , NAKAI TADAHIKO , IMAMURA KAZUO
IPC分类号： G02B6/02 , G02B6/10 , G02B5/18
摘要： A highly reliable fiber grating and its manufacturing method, wherein: as a core (2), in addition to Ge of an ordinary concentration equivalent to the concentration of the core of a connection object optical fiber, a core codoped with Sn and Al of predetermined concentrations is employed; a primary covering layer (4) made of ultraviolet ray transmitting resin which transmits an ultraviolet ray with a wavelength of 240 nm - 270 nm and, on the other hand, absorbs an ultraviolet ray with a wavelength in wavelength regions shorter than 240 nm and longer than 270 nm to be cured is applied to the core and the glass part (F) of a cladding (3); a grating is written by applying an ultraviolet ray to the outside of the primary covering layer; and a secondary covering layer (7) made of resin which has a negative linear expansion coefficient so as to cancel and suppress the elongation and contraction caused by the positive linear expansion coefficient of the glass part involving temperature change is applied to the primary covering layer; whereby the grating can be written without causing the deterioration of transmission characteristics and, in addition, both the transmission characteristics and mechanical characteristics can be satisfied at the same time while the improvement of productivity is not obstructed and, moreover, temperature characteristics can be stabilized.

2. 发明公开

EP1191649A4 OPTICAL FIBER 审中-公开
标题翻译： OPTISCHE FASER
公开(公告)号：EP1191649A4
公开(公告)日：2004-11-03
申请号：EP00922954
申请日：2000-05-01
申请人： MITSUBISHI CABLE IND LTD
发明人： YOSHIDA MINORU , IMAMURA KAZUO , NAKAI TADAHIKO , SUDO YASUHIDE
IPC分类号： H01S3/06 , G02B5/18 , G02B6/02 , G02B6/036 , H01S3/067 , G02B6/16 , G02B6/22
CPC分类号： G02B6/02042 , G02B6/02095 , H01S3/067 , H01S3/06716 , H01S3/0672 , H01S3/06729 , H01S3/0675 , H01S3/06754
摘要： A long cycle grating (8) by which an excitation light propagated through the 2nd core (4) of a double-core type optical fiber composed of a 1st core (2) and the 2nd core (4) formed on the outer circumference of the 1st core (2) is guided into the 1st core (2) is formed on the 1st core (2) to improve an excitation efficiency.
摘要翻译：激励光在由第1芯（2）和第2芯（4）的外周形成的双芯型光纤的第2芯（4）传播的长周期光栅（8）在第一铁芯（2）上形成有第一铁芯（2），第一铁芯（2）被引导至第一铁芯（2），以提高励磁效率。

3. 发明专利

CA2370962A1 OPTICAL FIBER 未知
公开(公告)号：CA2370962A1
公开(公告)日：2000-11-16
申请号：CA2370962
申请日：2000-05-01
申请人： MITSUBISHI CABLE IND LTD
发明人： SUDO YASUHIDE , NAKAI TADAHIKO , IMAMURA KAZUO , YOSHIDA MINORU
IPC分类号： H01S3/06 , G02B5/18 , G02B6/02 , G02B6/036 , H01S3/067 , G02B6/16 , G02B6/22
摘要： A long cycle grating (8) by which an excitation light propagated through the 2nd core (4) of a double-core type optical fiber composed of a 1st core (2) and the 2nd core (4) formed on the outer circumference of the 1st core (2) i s guided into the 1st core (2) is formed on the 1st core (2) to improve an excitation efficiency.

4. 发明公开

EP2230540A4 OPTICAL FIBER 有权转让
标题翻译： OPTISCHE FASER
公开(公告)号：EP2230540A4
公开(公告)日：2014-06-04
申请号：EP08870582
申请日：2008-12-19
申请人： MITSUBISHI CABLE IND LTD
发明人： NAKAI TADAHIKO , KINOSHITA TAKAHARU , SATAKE TAKESHI , AKUTSU TAKEJI , YAMASAKI MOTOHIKO
IPC分类号： G02B6/02 , G02B6/036 , G02B6/14
CPC分类号： G02B6/14 , G02B6/02395 , G02B6/03644 , G02B6/03655
摘要： An optical fiber includes a core (1a) having an oblong rectangular or square cross section and made of quartz, a cladding (2) surrounding the core (1a), having a circular outer cross-sectional shape, having a lower refractive index than the core (1a), and made of resin, and a support layer (3) surrounding the cladding (2) and made of quartz.
摘要翻译：光纤包括具有长方形或正方形横截面并由石英制成的芯体（1a），包围芯体（1a）的包层（2）具有圆形的外部横截面形状，折射率低于芯部（1a），由树脂制成，以及围绕包层（2）并由石英制成的支撑层（3）。

5. 发明公开

EP2228674A4 OPTICAL FIBER AND METHOD FOR PRODUCING THE SAME 审中-公开
标题翻译：纤维光学导体及其制造方法
公开(公告)号：EP2228674A4
公开(公告)日：2013-10-23
申请号：EP08869979
申请日：2008-12-19
申请人： MITSUBISHI CABLE IND LTD
发明人： NAKAI TADAHIKO , KINOSHITA TAKAHARU , SATAKE TAKESHI , AKUTSU TAKEJI , YAMASAKI MOTOHIKO
IPC分类号： G02B6/02 , C03C25/24 , G02B6/00
CPC分类号： G02B6/02033 , C03C25/105 , G02B6/4296

6. 发明公开

EP1035425A4 FIBER GRATING, ITS MANUFACTURING METHOD AND ITS MANUFACTURING DEVICE 审中-公开
标题翻译：纤维网格，生产过程中产生设备
公开(公告)号：EP1035425A4
公开(公告)日：2005-12-28
申请号：EP98955930
申请日：1998-11-25
申请人： MITSUBISHI CABLE IND LTD
发明人： IMAMURA KAZUO , NAKAI TADAHIKO , SUDO YASUHIDE
IPC分类号： G02B6/02 , G02B6/10 , G02B5/18
CPC分类号： G02B6/02138 , G02B2006/02161
摘要： A highly reliable fiber grating and its manufacturing method, wherein: as a core (2), in addition to Ge of an ordinary concentration equivalent to the concentration of the core of a connection object optical fiber, a core co-doped with Sn and Al of predetermined concentrations is employed; a primary covering layer (4) made of ultraviolet ray transmitting resin which transmits an ultraviolet ray with a wavelength of 240 nm - 270 nm and, on the other hand, absorbs an ultraviolet ray with a wavelength in wavelength regions shorter than 240 nm and longer than 270 nm to be cured is applied to the core and the glass part (F) of a cladding (3); a grating is written by applying an ultraviolet ray to the outside of the primary covering layer; and a secondary covering layer (7) made of resin which has a negative linear expansion coefficient so as to cancel and suppress the elongation and contraction caused by the positive linear expansion coefficient of the glass part involving temperature change is applied to the primary covering layer; whereby the grating can be written without causing the deterioration of transmission characteristics and, in addition, both the transmission characteristics and mechanical characteristics can be satisfied at the same time while the improvement of productivity is not obstructed and, moreover, temperature characteristics can be stabilized.

7. 发明专利

JP2013205573A Optical fiber end cap junction structure and manufacturing method thereof 有权
标题翻译：光纤端盖结构及其制造方法
公开(公告)号：JP2013205573A
公开(公告)日：2013-10-07
申请号：JP2012073570
申请日：2012-03-28
申请人： Mitsubishi Cable Ind Ltd , 三菱電線工業株式会社
发明人： KOTO MASAHIRO , NAKAI TADAHIKO
IPC分类号： G02B6/02
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber end cap junction structure which suppresses deformation of a core in a fiber end surface on the junction side of an optical fiber.SOLUTION: An optical fiber end cap junction structure 10 includes an optical fiber 110 and an end cap 20 to which one fiber end surface of the optical fiber 110 is fused and joined, and further includes a coating member 30 which covers the end part on the junction side of the optical fiber 110 and is fused and joined to the end cap 20 together with the optical fiber 110.
摘要翻译：要解决的问题：提供一种光纤端盖接合结构，其抑制光纤在光纤端面上的纤芯的变形。光纤端盖结结构10包括光纤110和光纤110的一个光纤端面熔合并连接的端盖20，还包括覆盖在光纤110的接合侧的端部的被覆部件30，并被熔接并接合到端盖与光纤110一起。

8. 发明专利

JP2004146797A Optical amplifier, optical amplification control method and program for use therewith 审中-公开
标题翻译：光放大器，光放大控制方法及其使用方案
公开(公告)号：JP2004146797A
公开(公告)日：2004-05-20
申请号：JP2003304220
申请日：2003-08-28
申请人： Mitsubishi Cable Ind Ltd , 三菱電線工業株式会社
发明人： NAKAI TADAHIKO , HASHIMOTO MAMORU , SAWADA HISASHI , TAHIRA MASATOSHI , KIKUCHI HIDETOMO
IPC分类号： H01S3/131 , H01S3/06 , H01S3/10
摘要： PROBLEM TO BE SOLVED: To provide an optical amplifier together with an optical amplification control method and program for use therewith which is capable of continuing the amplifier operation as long as possible even though a light incident level falls below a predetermined level, and also which can prevent the service life of the amplifier from being shortened. SOLUTION: In this optical amplifier, a constant output control section 28 acts as ALC that outputs a driving current to a pump laser 16 so as to make a light output level nearly constant while a light incident level exceeds a predetermined level. Besides, a suppression control unit 30 acts as AGC that outputs a driving current to a pump laser 16 so as to make an light output level lower than the maximum light output level of exciting light, while a light incident level falls below a predetermined level. In the AGC, constant gain control is performed. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种光放大器及其使用的光放大控制方法和程序，其能够尽可能长时间地继续放大器操作，即使光入射水平低于预定水平，以及也可以防止放大器的使用寿命缩短。解决方案：在这种光放大器中，恒定输出控制部分28用作ALC，其将激励电流输出到泵浦激光器16，以使光输出电平几乎恒定，同时光入射电平超过预定电平。此外，抑制控制单元30作为AGC，其将光驱动电流输出到泵浦激光器16，以使光输出水平低于激发光的最大光输出水平，同时光入射水平低于预定水平。在AGC中，执行恒定增益控制。版权所有（C）2004，JPO

9. 发明专利

JP2004079937A Optical-amplifier and controlling method therefor 有权
公开(公告)号：JP2004079937A
公开(公告)日：2004-03-11
申请号：JP2002241604
申请日：2002-08-22
申请人： Mitsubishi Cable Ind Ltd , 三菱電線工業株式会社
发明人： KAWAMURA TATSUHIRO , SAWADA HISASHI , NAKAI TADAHIKO , TAHIRA MASATOSHI
IPC分类号： H01S3/10 , H01S3/094 , H01S3/0941 , H01S3/131 , H01S5/0683 , H04B10/07 , H04B10/079 , H04B10/293 , H04B10/08
摘要： PROBLEM TO BE SOLVED: To protect an optical amplifier when an interference is generated in its transmitting signal-light. SOLUTION: In the case of so controlling an optical amplifier automatically as to keep its output power constant, a pumping-light power is suppressed when the input-light power of an amplification-oriented optical fiber 13 is not larger than a predetermined value, and the pumping-light power fed from a pumping-light source 16 to the amplification-oriented optical fiber 13 is not smaller than a predetermined value. Consequently, the optical amplifier can be protected while avoiding the stopping of an optical transmission, except for the unavoidable cases considered from the view-point of the protection of an apparatus. COPYRIGHT: (C)2004,JPO

10. 发明专利

JP2000089045A MANUFACTURE OF FIBER GRATING AND MANUFACTURING DEVICE 失效
公开(公告)号：JP2000089045A
公开(公告)日：2000-03-31
申请号：JP7697199
申请日：1999-03-19
申请人： MITSUBISHI CABLE IND LTD
发明人： IMAMURA KAZUO , GENCHI TAKESHI , KONDO KATSUAKI , NAKAI TADAHIKO , SUDO TAKAHIDE
IPC分类号： G02B6/00 , G02B6/02 , G02B6/10
摘要： PROBLEM TO BE SOLVED: To expand the control range of wavelength characteristics by enabling a shift control of wavelength characteristics toward the short wavelength side and the impression of a high tension, and to obtain a manufacturing device for a fiber grating in which the wavelength is controlled. SOLUTION: Both side parts in the fiber axis direction, while interposing ultraviolet laser beam-irradiating region of a coated optical fiber 1, in which a covering layer is formed of an ultraviolet ray transmissive resin, between them, are wound around a pair of winding drums 34, 35 so as not to overlap each other, are fixed so as not to be relatively moved. One winding drum 35 is forcibly rotated by a set rotational amt. around a Y axis with a pulse motor, thereby impressing a tension, thus keeping a core in a state of being under a prescribed elongation strain (tension impressing stage). In this state, the grating is written on the core by irradiating the covering layer with an ultraviolet laser beam via a phase mask from above the covering layer (irradiating stage), the motor is rotated in the opposite direction, thereby releasing the elongation strain, the coated optical fiber is contracted to an original state, thereby making the grating pitch narrow (tension releasing stage), and again, screening is carried out by impressing a tension for testing.

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