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1. 发明专利

JPS60184218A OPTICAL FIBER CORE 失效
公开(公告)号：JPS60184218A
公开(公告)日：1985-09-19
申请号：JP3918484
申请日：1984-03-01
申请人： FUJIKURA LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOBAYASHI TOSHIAKI , SANADA KAZUO , MURAYAMA TOSHIAKI , SUGAWARA YASUYUKI , UESUGI SUNAO , ISHIHARA HIROSHI
IPC分类号： C03C25/10 , G02B6/44
摘要： PURPOSE:To keep good transmission characteristics even after an optical fiber core is used for a long period, by setting SiH radicals, which remain in a silicone rubber after hardening, to a value lower than a specific value obtained by the infrared absorption method and providing the optical fiber core with a primary coating layer consisting of this silicone rubber. CONSTITUTION:With respect to the optical fiber core having the coating layer consisting of a thermosetting silicone rubber which has 0.1mm. thickness and >=70% transmittance of infrared absorption spectrums for 2,100-2,200cm wave number, SiH radicals remain hardly in the coating layer. H2 due to these SiH radicals is not generated, and the transmission loss is not increased for a long period. A hardener is crosslinked up to 100% by sufficient crosslinking for the purpose of reducing SiH radicals in the thermosetting silicone rubber as much as possible. That is, the temperature of crosslinking is set to 900-1,000 deg.C, and gas such as gaseous N2 which does not contain oxygen is flowed into a hardening furnace, and O2 concentration of the atmosphere in the furnace is set to

2. 发明专利

JPS6032205A OPTICAL CABLE 失效
公开(公告)号：JPS6032205A
公开(公告)日：1985-02-19
申请号：JP14047683
申请日：1983-08-02
申请人： NIPPON TELEGRAPH & TELEPHONE , FUJIKURA LTD
发明人： ISHIHARA HIROSHI , ISHIDA YUKINORI , UESUGI SUNAO , MURAKAMI TAIJI , UCHIDA NAOYA , NEGISHI YUKIYASU , KOBAYASHI TOSHIAKI
IPC分类号： H01B11/22 , G02B6/44

3. 发明专利

JPH11212125A METHOD AND DEVICE FOR COMPRESSING OPTICAL PULSE 失效
公开(公告)号：JPH11212125A
公开(公告)日：1999-08-06
申请号：JP1651298
申请日：1998-01-29
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MAHESHU R JUNAKER , YAMAGUCHI EIICHI , UESUGI SUNAO
IPC分类号： G02F1/35
摘要： PROBLEM TO BE SOLVED: To enable the compression of an optical pulse even when the intensity of incident pulse light is high, to simplify an optical system as well and to easily perform light compression by using a linear diatomic molecular material. SOLUTION: This device is composed of a microcapillary 1 made of metal vessel having a window part as an optical waveguide when filling is gas or fluid, convergent system 3 for making incident pulse light 2 incident to the microcapillary 1, and optical system 4 for enlarging an optical pulse from the microcapillary 1. The compressed optical pulse is provided as emitted pulse light 5. In this case, the pulse light 2 is made incident to the linear diatomic molecular material especially such as hydrogen gas or heavy hydrogen gas, and optical pulse width is compressed by the peculiar characteristics of the linear diatomic molecular material. Thus, since the linear diatomic molecular material is used for a light compressing medium, even when the pulse light of high intensity is made incident, the optical pulse compression can be provided without light damage and extremely short pulse light can be provided.

4. 发明专利

JPH0736356A ANIMATION RECORDING DEVICE 失效
公开(公告)号：JPH0736356A
公开(公告)日：1995-02-07
申请号：JP17683293
申请日：1993-07-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MITSUNAGA MASAHARU , UESUGI SUNAO
IPC分类号： G03H1/04 , G03H1/02 , G03H1/22 , G03H1/26
摘要： PURPOSE:To record animations perfectly continued in points of time without using the after-image of human eyes by spatially fixing an optical recording material, and sweeping the wavelength of an emitted laser beam, thereby recording and reproducing the dynamic image. CONSTITUTION:Both a reference laser beam 30 and an image laser beam 30 are emitted at once to an optical recording material in a low temperature vessel 23 for holding the optical recording material, the wavelength of the laser beam is slowly swept within the absorptive line width of the optical recording material, and an animation/M is also slowly moved. Therefore, the change of the image laser beam by the motion of an object is recorded. To read this animation the image laser beam 31 is blocked, the intensity of the reference laser beam 30 is reduced to, for example, about 1/10, and the optical recording material is exposed thereto. The image detected by a CCD camera 25 is monitored. The frequency of the reference laser beam 30 is swept similarly to writing, whereby the animation appears on a screen.

5. 发明专利

JPS63231245A HIGHLY STABLE LIGHT LOSS MEASURING METHOD 失效
公开(公告)号：JPS63231245A
公开(公告)日：1988-09-27
申请号：JP6396087
申请日：1987-03-20
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TANAKA CHIHAYA , UESUGI SUNAO , NOGUCHI KAZUHIRO
IPC分类号： G01N21/59
摘要： PURPOSE:To stably measure light loss even if a light output varies by measuring the transmitted light power of a body to be measured with modulated light obtained by modulating a light output for measurement and correcting the quantity of variation of the light output according to the quantity of variation of the light output included in the modulated signal. CONSTITUTION:Light from a laser diode is split by a beam splitter 1 into two; and one is made incident on a photodetector provided in a light source part and the other exits from the light source part through an optical system 2 and is made incident on a body to be measured. An output variation component from the laser diode which is contained in the light received by the photodetector is extracted through a low-pass filter and an encoder performs sampling, quantization, and encoding processing. The encoded light output variation information is code-converted into a format suitable to light loss measurement and transmission to a photodetection part, and the driving circuit for the laser diode is operated with the conversion output.

6. 发明专利

JPS6252508A OPTICAL FIBER 失效
公开(公告)号：JPS6252508A
公开(公告)日：1987-03-07
申请号：JP19341285
申请日：1985-09-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OHASHI MASAHARU , KUWAKI NOBUO , AOMI YOSHIYUKI , UESUGI SUNAO , TANAKA CHIHAYA
IPC分类号： G02B6/028 , G02B6/02 , G02B6/036
摘要： PURPOSE:To reinforce resistance to bending loss and to improve the controllability of zero dispersion wavelength by specifying the relation among the specific refractive index difference between a center core and a clad, the specific refractive index difference between a core with a low refractive index and the clad, the radius of the center core, and the radium of the core with the low refractive index. CONSTITUTION:The core having the lower refractive index than the center core is provided outside the center core and a clad part is provided further outside to form an optical fiber having a stepwise profile. Then when P1=DELTA2/DELTA1 and P2=a1/a2, 0 0.004, where DELTA1 (DELTA1=(n 1-n 2)/2n 1, where n1 is the maximum refractive index of the center core and n2 is the refractive index of the clad) is the specific refractive index difference between the center core and clad, DELTA2(DELTA2=(n 3-n 2)/2n 3, where n3 is the maximum refractive index of the core with the low refractive index and n2 is the refractive index of the clad) is the specific refractive index difference between the core with the low refractive index and clad, and a1 and a2 are the radius of the center core and the radius of the core with the low refractive index. Consequently, the resistance to bending loss is obtained and the controllability of zero dispersion wavelength is excellent.

7. 发明专利

JPS61256937A PRODUCTION OF OPTICAL FIBER BASE MATERIAL 失效
公开(公告)号：JPS61256937A
公开(公告)日：1986-11-14
申请号：JP9495185
申请日：1985-05-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ISHIHARA HIROSHI , UESUGI SUNAO , KAWADA OSAMU
IPC分类号： G02B6/00 , C03B37/012
摘要： PURPOSE:To produce a base material for an optical fiber with good productivity by placing a bar-shaped glass body into a plastic mold having stretchability, packing a pulverous glass particle material having a different refractive index around the same and pressurizing uniformly the plastic mold from the outside to one body then heating the material to vitrify the same to transparent glass. CONSTITUTION:The bar-shaped body 6 of the glass having an optional refractive index is put into the plastic mold 5 consisting of silicone rubber or the like having excellent stretchability and the pulverous glass particles 4 which consists essentially of the SiO2 obtd. by the hydrolysis, flame hydrolysis or thermal oxidation of halide of Si such as SiCl4 or alkoxy compd. and diffused with F and has the refractive index different from the refractive index of the body 6 are backed around the body 6. The plastic mold 5 is put into a pressurizing device 7 and the mold 5 is uniformly pressurized from the outside by a hydrostatic pressurizing method using water 8 to press-weld the particles 4 to the circumference of the body 6. The body is then heated in a heating furnace and is vitrified to transparent glass, by which the base material for the optical fiber is produced.

8. 发明专利

JPS6037639B2 失效
公开(公告)号：JPS6037639B2
公开(公告)日：1985-08-27
申请号：JP17549580
申请日：1980-12-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： UESUGI SUNAO , IKEDA MASAHIRO
IPC分类号： H01S3/07 , G02F1/35 , H01S3/06 , H01S3/30

9. 发明专利

JPS56144415A LIGHT SIGNAL AMPLIFIER 失效
公开(公告)号：JPS56144415A
公开(公告)日：1981-11-10
申请号：JP4890280
申请日：1980-04-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： UESUGI SUNAO , IKEDA MASAHIRO
IPC分类号： H04B10/60 , G02B6/00 , G02F1/01 , G02F1/35 , H01S3/30 , H04B10/293 , H04B10/299 , H04B10/40 , H04B10/50
摘要： PURPOSE:To amplify signal light by the use of Brillouin derivative scattering by entering the signal light and pumping light of mutually orthogonal polarizations from each of the double refractive prisms provided at both ends of an optical fiber. CONSTITUTION:Pumping light of a single frequency is energized from a pumping input end 3 into an optical fiber through the polarizer of a double refractive prism 1 by linearly polarized light. The signal light of the polarization orthogonal to the polarization of the pumping light is energized through a double refractive prism 1' from a light signal input end 4. The wavelength of the signal light is on the lower frequency side by Brillouin shift extend than the pumping light and since both propagate in the opposite directions, the amplification of the signal light is accomplished. The amplified signal light is orghogonal in polarization to the pumping light and therefore it emits by being separated from the pumping light by the prism 1. If the signal light is wider than gain width, waveform shaping is accomplished as well.

10. 发明专利

JPS5515105A NONNLINEAR OPTICAL DEVICE 失效
公开(公告)号：JPS5515105A
公开(公告)日：1980-02-02
申请号：JP8607478
申请日：1978-07-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： UESUGI SUNAO , OOGURO KAZUHIRO
IPC分类号： G02B6/12 , G02F1/39
摘要： PURPOSE:To lower driving voltage, reduce electrode capacity and perform high speed operation and high speed controlling by performing light parametric mutual action within an optical guide and further applying voltage to the optical guide thereby changing phase matching conditions and controlling wavelengths. CONSTITUTION:The optical guide is made as a region 3 where refractive index is high within a crystal substrate 2. Light parametric oscillation takes place within the light resonator constituted by the optical guide 3 and the reflecting mirror 4 made at the end face of the optical guide 3. Voltage is applied to the electrodes 1, 1' on both sides of the optical guide 3, whereby their phase matching conditions may be controlled. Ordinarily, the width of the optical guide 3 is several tens mum or under and therefore the inter-electrode spacing D may be also made to the same extent, whereby driving voltage may be lowered. In addition, the feasibility of making the electrode area smaller enables capacity to be reduced and high speed operation and high speed control to be performed.

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