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1. 发明专利

JPH11109143A OPTICAL FIBER ADDED WITH RARE EARTH ELEMENT AND WIDE BAND OPTICAL FIBER AMPLIFIER USING IT 失效
公开(公告)号：JPH11109143A
公开(公告)日：1999-04-23
申请号：JP27449697
申请日：1997-10-07
申请人： HITACHI CABLE , SHINETSU CHEMICAL CO
发明人： IMOTO KATSUYUKI , NARITA YOSHIHIRO , EJIMA MASAKI , ABE ATSUSHI
IPC分类号： G02B6/00 , G02B6/036 , H01S3/06 , H01S3/10 , G02B6/22
摘要： PROBLEM TO BE SOLVED: To provide optical fiber added with rare earth elements which has high gain, wide band and low noise index characteristics, and is low in power consumption and cost, and to provide a wide band optical fiber amplifier using it. SOLUTION: A circular sectional clad 15 having a refractive index nc is provided with a first core 11 having a diameter D and a high refractive index n01 (n01 >nc ) and consisting of quartz glass (SiO2 ) to which erbium(Er), phosphor (P) and aluminum(Al) are co-added substantially in the center, a first intermediate layer 1 having a thickness S2 and a low refractive index nm1 (nm1 =n01 ) and consisting of quartz glass (SiO2 ) to which erbium(Er), aluminum(Al) and germanium(Ge) are co-added to the circumference of the first intermediate layer 12, and a second intermediate layer 14 having a thickness S2 and a low refractive index nm2 (nm2

2. 发明专利

JPH10242548A ER ADDED MULTICORE FIBER AND LIGHT AMPLIFIER USING THE SAME 失效
公开(公告)号：JPH10242548A
公开(公告)日：1998-09-11
申请号：JP3933497
申请日：1997-02-24
申请人： HITACHI CABLE , SHINETSU CHEMICAL CO
发明人： IMOTO KATSUYUKI , NARITA YOSHIHIRO , KAMIYA KAZUO , ABE ATSUSHI
IPC分类号： G02B6/04 , H01S3/06 , H01S3/07 , H01S3/10
摘要： PROBLEM TO BE SOLVED: To provide an Er added multicore fiber whose gain wavelength characteristics are flat in the cases of not only low gain but also high gain, and a light amplifier using the fiber. SOLUTION: An Er added multicore fiber 20 has at least cores 22 wherein Er and Al are added in a clad 21 to which fluorine is added. In the longitudinal direction of the fiber 20, a taper type region 23 wherein at least two mode field diameters MFD are changed is installed. The lights traveling in the cores 22 in the Er added multicore fiber 20 mutually interfere with each other. While the lights travel in the taper type region 23, the lights are confined in the cores 22 and outputted. That is, signal lights having wavelengths of 1.53μm or shorter traveling in the tapered region 23 mutually couple with each other, and optical filtering effect is generated. By using the Er added multicore fiber 20 in an optical amplifier, the gain wavelength characteristics are flattened in the cases of not only low gain but also high gain.

3. 发明专利

JPH1160284A RARE EARTH ELEMENT-ADDED OPTICAL FIBER AND ITS PRODUCTION, AND OPTICAL FIBER AMPLIFIER USING THE RARE EARTH ELEMENT-ADDED OPTICAL FIBER 失效
公开(公告)号：JPH1160284A
公开(公告)日：1999-03-02
申请号：JP20943297
申请日：1997-08-04
申请人： HITACHI CABLE , SHINETSU CHEMICAL CO
发明人： IMOTO KATSUYUKI , NARITA YOSHIHIRO , EJIMA MASAKI , ABE ATSUSHI
IPC分类号： G02B6/00 , C03C13/04 , C03C25/10 , H01S3/06 , H01S3/07 , H01S3/10 , C03C25/02
摘要： PROBLEM TO BE SOLVED: To obtain an optical fiber capable of realizing the wide expansion of a band zone, a high profit and a large length by disposing a core comprising a SiO2 glass containing Er, Al and Te and a cladding comprising a polymer material covering the outer circumference of the core. SOLUTION: This rare earth element-added optical fiber comprises (a) a core 1 comprising SiO2 glass containing Er preferably in an amount of 100-2000 wt.ppm, Al preferably in an amount of 1000 wt.ppm to 6 wt.%, and Te preferably in an amount of 1 wt.% to ten and several wt.%, and a polymer cladding 2 comprising a polymer material (e.g. a silicone resin, polyvinylidene fluoride or the like) covering the outer circumference of the core 1. The optical fiber also comprises (b) a core 1 comprising SiO2 glass containing Er, Al and

4. 发明专利

JP2007086556A Method for manufacturing anisotropic glass, anisotropic glass, and polarizing element using the same 有权
标题翻译：使用该方法制造各向异性玻璃，异相玻璃和偏光元件的方法
公开(公告)号：JP2007086556A
公开(公告)日：2007-04-05
申请号：JP2005277089
申请日：2005-09-26
申请人： Asahi Techno Glass Corp , Central Glass Co Ltd , Hitachi Cable Ltd , Okamoto Glass Co Ltd , セントラル硝子株式会社 , 岡本硝子株式会社 , 日立電線株式会社 , 旭テクノグラス株式会社
发明人： TAKESHIMA NOBUHITO , IWANO TAKASHI , NARITA YOSHIHIRO , OSADA TAKASHI
IPC分类号： G02B5/30 , C03C23/00
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing an anisotropic glass in an easy method and a manufacturing process, and to provide an anisotropic glass and a polarizing element using the glass.
SOLUTION: A glass material which is an isotropic substance is irradiated with laser light having high electric field intensity to produce an anisotropic region in the isotropic medium. The anisotropic axis is controlled by controlling the electric field direction of the irradiating laser light. That is, laser light having high electric field intensity is focused to irradiate an inner portion of the glass to form an anisotropic region having an axis depending on the electric field direction of the laser light. The obtained glass material shows a difference in transmittance for light depending on angles in the region having the anisotropy.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种容易的方法和制造工艺中制造各向异性玻璃的方法，并且使用该玻璃提供各向异性玻璃和偏振元件。解决方案：使用具有高电场强度的激光照射作为各向同性物质的玻璃材料，以在各向同性介质中产生各向异性区域。通过控制照射激光的电场方向来控制各向异性轴。也就是说，聚焦具有高电场强度的激光以照射玻璃的内部以形成具有取决于激光的电场方向的轴的各向异性区域。所获得的玻璃材料在具有各向异性的区域中的角度表现出与透光率的差异。版权所有（C）2007，JPO＆INPIT

5. 发明专利

JP2005206434A Manufacturing process of microparticle dispersion glass and ultraviolet cut filter 审中-公开
标题翻译：微波分散玻璃和超紫外线切割过滤器的制造工艺
公开(公告)号：JP2005206434A
公开(公告)日：2005-08-04
申请号：JP2004016059
申请日：2004-01-23
申请人： Asahi Glass Co Ltd , Hitachi Cable Ltd , Okamoto Glass Co Ltd , 岡本硝子株式会社 , 日立電線株式会社 , 旭硝子株式会社
发明人： TAKESHIMA NOBUHITO , KUROIWA YUTAKA , NARITA YOSHIHIRO , HIRAO KAZUYUKI
IPC分类号： G02B5/22 , C03C14/00
CPC分类号： C03C3/118 , C03C4/085 , C03C14/00
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing process of glass in which microparticles of a semiconductor compound containing sulfur, selenium or tellurium are dispersed and microparticle dispersion glass which does not require heat treatment, and an ultraviolet cut filter using the glass.
SOLUTION: The manufacturing process of the microparticle dispersion glass comprises mixing glass as a glass matrix, a compound containing a substitution substance including at least one kind selected from sulfur, selenium and tellurium and zinc oxide to obtain a mixture, melting the mixture by heating and cooling it so that the oxygen in the zinc oxide is substituted with the substitution substance through substitution reaction and miroparticles consisting of zinc and the substitution substance is deposited in the glass. Preferably, the concentration of the substitution substance to be added in the mixture such as sulfur, selenium and tellurium is so adjusted in advance as to obtain a desired particle size.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决的问题：提供其中分散有硫，硒或碲的半导体化合物的微粒分散的玻璃的制造方法和不需要热处理的微粒分散玻璃，以及使用该玻璃的紫外线截取滤光片。解决方案：微粒分散玻璃的制造方法包括将玻璃作为玻璃基质混合，含有选自硫，硒，碲和氧化锌中的至少一种的取代物质的化合物，得到混合物，使混合物熔融通过加热和冷却，使得氧化锌中的氧被取代物质通过取代反应取代，并且由锌组成的微粒和取代物质沉积在玻璃中。优选地，预先调节添加在混合物中的取代物质如硫，硒和碲的浓度以获得所需的粒度。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2000171655A LOSS COMPENSATION TYPE OPTICAL FIBER FOR WAVELENGTH MULTIPLEX TRANSMISSION 失效
公开(公告)号：JP2000171655A
公开(公告)日：2000-06-23
申请号：JP34445398
申请日：1998-12-03
申请人： HITACHI CABLE
发明人： OSONO KAZUMASA , NASUNO KOKI , NARITA YOSHIHIRO
IPC分类号： H01S3/06 , G02B6/028 , H01S3/067 , G02B6/18
摘要： PROBLEM TO BE SOLVED: To provide a loss compensation type optical fiber for wavelength multiplex transmission which lessens the occurrence of four light wave mixing by a nonlinear phenomenon even when a dispersion flat fiber is used in a very long distance wavelength multiplex transmission system. SOLUTION: Erbium having an amplification function at a 1.55 μm band is added to a core part 1 which has a zero dispersion wavelength within a range of 1560 to 1600 nm of the optical fiber for wavelength multiplex transmission which executes transmission with one optical fiber by multiplexing a plurality of light signals varying in wavelengths in which a signal light propagates and, therefore, the occurrence of the four light wave mixing by the nonlinear phenomenon is lessened even if the dispersion flat fiber is used in the very long distance wavelength multiplex transmission system.

7. 发明专利

JP2000159531A PRODUCTION OF OPTICAL FIBER PREFORM 失效
公开(公告)号：JP2000159531A
公开(公告)日：2000-06-13
申请号：JP33145598
申请日：1998-11-20
申请人： HITACHI CABLE
发明人： NARITA YOSHIHIRO , OSONO KAZUMASA
IPC分类号： C03B37/014 , C03B37/018 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To provide a method for producing an optical fiber preform usable for producing an optical fiber for wave multiplex transmission. SOLUTION: A refractive index-increasing dopant-added SiO2 glass for a core part, and an additive-free SiO2 glass for a depressed part are synthesized together by a VAD(vapor phase axial deposition) method, and accumulated so as to have nearly the same low bulk densities. The obtained SiO2 glasses are dehydrated and subjected to a half-sintering heat treatment at a temperature lower than the temperature capable of providing transparent glass to regulate the bulk density at the core part soot so as to be >=1.1 g/cm3, and that at the depressed part soot so as to be

8. 发明专利

JPH10186163A OPTICAL COUPLING DEVICE AND ITS PRODUCTION 失效
公开(公告)号：JPH10186163A
公开(公告)日：1998-07-14
申请号：JP35061796
申请日：1996-12-27
申请人： HITACHI CABLE
发明人： OKUBO HIROYUKI , NARITA YOSHIHIRO
IPC分类号： G02B6/26 , G02B6/122 , G02B6/30
摘要： PROBLEM TO BE SOLVED: To lower propagation loss and connection loss at a low cost. SOLUTION: An easily workable polymer is used at least at a part of the material of the optical coupling device 20, by which the cost per piece of the optical coupling device is reduced. The propagation loss is extremely reduced by using a waveguide of a polymer for a core part 21. Further, structure parameters are so determined as to increase the diameter of the core part 21 toward the other end from one end, to equalize the diameter of the optical waveguide and the core diameter at one end and to equalize the diameters of the optical fiber and the core diameter at the other end, by which the connection loss is made extremely small.

9. 发明专利

JPS61151032A APPARATUS FOR FEEDING RAW MATERIAL GAS FOR PRODUCTION OF OPTICAL FIBER PREFORM 失效
公开(公告)号：JPS61151032A
公开(公告)日：1986-07-09
申请号：JP27935284
申请日：1984-12-24
申请人： HITACHI CABLE
发明人： NIIZAWA MASAHARU , YABUKI TSUTOMU , NARITA YOSHIHIRO
IPC分类号： G02B6/00 , C03B37/014 , C03B37/018 , C23C16/448
摘要： PURPOSE:To feed the raw material gas stably, preventing the condensation of the gas in the tube after the joint part, by bubbling a part of the carrier gas in a raw material tank to form a mixture of the raw material and the carrier gas, heating the remaining part of the carrier gas at a temperature higher than the temperature of the above mixed gas and joining both gas streams. CONSTITUTION:Carrier gas supplied through the line 1 is divided into two, and passed through flow controlling devices 2, 3. The stream passed through the device 2 is introduced into the raw material tank 4 and mixed with the raw material liquid 5 in the tank to form a mixed gas, which is sent through the raw material supplying device to the reaction burner of an optical fiber preform producing apparatus. The carrier gas stream passed through the flow controlling device 3 is heated with the carrier gas heater 9 to a temperature higher than the temperature of the mixed gas and is joined with the mixed gas at the joining part 10. A mixed gas can be supplied stably with a simple structure.

10. 发明专利

JPS6186434A Heating furnace for producing optical fiber parent material 失效
标题翻译：用于生产光纤母材的加热炉
公开(公告)号：JPS6186434A
公开(公告)日：1986-05-01
申请号：JP20859184
申请日：1984-10-04
申请人： Hitachi Cable Ltd
发明人： YABUKI TSUTOMU , NARITA YOSHIHIRO
IPC分类号： G02B6/00 , C03B37/014 , C03B37/012
CPC分类号： C03B37/0146
摘要： PURPOSE:To permit use of a furnace core tube many times repeatedly by supporting the furnace core tube by a specified method by the aid of flanges provided to the top and bottom of the furnace core tube. CONSTITUTION:A top flange 6a and a bottom flange 6b are provided to a furnace core tube 7; (i) the top flange 6a, on which a top chamber 4 is laid, is suspended by a suspending fixture 14; (ii) a flange 13 of the bottom chamber 5 is fitted to contact with the rear side of the bottom flange 6b, and the flange 13 is suspended by a keeping fixture 15 interposing a cushion material 12. Thus, the furnace core tube 7 is supported and connected to the top chamber and the bottom chamber 4, 5 (10 is a heater; 11 is a furnace core cover). In the production of a transparent glass rod 3 by the heat-treatment of a porous glass parent material 2 using above-described heating furnace, thermal expansion or contraction of the furnace cover tube 7 due to the heat generated thereby is absorbed by the cushion material 12. Therefore, the damage of the furnace core tube 7 is avoided permitting the continuous use of the tube for several tens time.
摘要翻译：目的：通过借助于设置在炉芯管的顶部和底部的凸缘，通过指定的方法支撑炉芯管，允许多次重复使用炉芯管。构成：将顶部凸缘6a和底部凸缘6b设置到炉芯管7; （i）顶部室4放置在其上的顶部凸缘6a被悬挂固定件14悬挂; （ii）底部室5的凸缘13被装配成与底部凸缘6b的后侧接触，并且凸缘13通过夹持缓冲材料12的保持夹具15而悬挂。因此，炉芯管7是支撑并连接到顶室和底室4,5（10是加热器; 11是炉芯盖）。在通过使用上述加热炉的多孔玻璃母体材料2的热处理来制造透明玻璃棒3时，由于由此产生的热而导致的炉盖管7的热膨胀或收缩被缓冲材料吸收因此，避免了炉芯管7的损坏，允许连续使用管数十次。

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