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1. 发明专利

JP2000347134A OPTICAL ISOLATOR AND OPTICAL DEVICE 失效
公开(公告)号：JP2000347134A
公开(公告)日：2000-12-15
申请号：JP15931199
申请日：1999-06-07
申请人： SHINETSU CHEMICAL CO , NIPPON TELEGRAPH & TELEPHONE , NTT ELECTRONICS CORP
发明人： IKARI MASANORI , RYUO TOSHIHIKO , SHINTAKU TOSHIHIRO , SUGIMOTO NAOTO , SHIBUKAWA ATSUSHI
IPC分类号： G02B27/28
摘要： PROBLEM TO BE SOLVED: To provide a polarization independent type optical isolator of a bidirectional multi-passage type having isolation functions respectively to the signal light from both directions without the occurrence of the separation of polarization dispersion and the separation of signal light without the particular provision of special compensation plates, etc. SOLUTION: The optical isolator 10 includes a pair of optical units 14 which are provided with half-wave plates 11 and 45 deg. Faraday rotators 12 in a tightly adhered or adhered state and in which the one-sided flanks of these half-wave plates 11 and 45 deg. Faraday rotators 12 exist on the same plane with each other. The one-sided flanks of these optical units are mutually tightly adhered or adhered in the state of arraying the half-wave plates 11 and the 45 deg. Faraday rotators 12 so as to face reversely from each other and in the state of inclining the same at 1 to 3 deg. with the normal vectors of their respective optical surfaces.

2. 发明专利

JPH11251140A MAGNETOSTATIC WAVE ELEMENT 失效
公开(公告)号：JPH11251140A
公开(公告)日：1999-09-17
申请号：JP5075598
申请日：1998-03-03
申请人： SHINETSU CHEMICAL CO , JAPAN BROADCASTING CORP
发明人： IKARI MASANORI , TANNO MASAYUKI , RIYUUOU TOSHIHIKO , KUKI TAKAO , NOMOTO TOSHIHIRO
IPC分类号： C30B29/28 , H01F10/24 , H01F10/28 , H01F41/28 , H01P1/23 , H01P3/00 , H01P7/00 , H03H9/25
摘要： PROBLEM TO BE SOLVED: To provide a reflection type magnetostatic wave element which is excellent in temperature characteristics in 1-1.35 GHz band where dynamic characteristics is improved than 400 MHz band. SOLUTION: A garnet magnetic thin film for a magnetostatic wave element, a transducer 4 for exciting the magnetic thin film with magnetostatic wave, and a bias magnetic field are provided. Here, the magnetic thin film is formed on a Gd3 Ga5 O12 substrate 1 off-angled by 1-5 deg. from a surface (110) by liquid- phase epitaxial method, and with an angle between the longitudinal direction of the transducer 4 and the vertical direction relative to direction of the magnetic thin film's crystal being θ1 , while an angle between the vertical direction relative to the longitudinal direction of the transducer 4 and a magnetic field application direction of a bias magnetic field being θ2 , a range is 0 deg.

3. 发明专利

JPH11202260A OPTICAL ISOLATOR 失效
公开(公告)号：JPH11202260A
公开(公告)日：1999-07-30
申请号：JP1346798
申请日：1998-01-07
申请人： SHINETSU CHEMICAL CO
发明人： IKARI MASANORI , RIYUUOU TOSHIHIKO
IPC分类号： G02F1/09 , G02B27/28
摘要： PROBLEM TO BE SOLVED: To enable a cancel type polarization independent optical isolator to have high optical characteristics. SOLUTION: This device is constituted by overlapping a first 172 wavelength board 3 at a part and one side of a Faraday rotator 4 and overlapping a second 1/2 wavelength board 5 at the part, which the first 1/2 wavelength board 3 does not overlap, on the other side of the Faraday rotator 1. In this case, the total sum of areas of chipping existent on an optical plane near an end face partitioning the parallel beams of the respective first and second 1/2 wavelength boards 3 and 5 by half can be less than 100 μm within the range irradiated with beams.

4. 发明专利

JPH1064728A MAGNETOSTATIC WAVE DEVICE 失效
公开(公告)号：JPH1064728A
公开(公告)日：1998-03-06
申请号：JP22238496
申请日：1996-08-23
申请人： SHINETSU CHEMICAL CO , JAPAN BROADCASTING CORP
发明人： IKARI MASANORI , TANNO MASAYUKI , RIYUUOU TOSHIHIKO , KUKI TAKAO , NOMOTO TOSHIHIRO
IPC分类号： C30B29/28 , H01F10/28
摘要： PROBLEM TO BE SOLVED: To obtain a magnetostatic wave device with its excited frequency shifted to the lower frequency side. SOLUTION: About a magnetostatic wave device formed by a magnetic thin film 2, transducer 4, and a bias magnetic field, the magnetic thin film 2 is formed on the substrate 1 off angled one to five degrees from 110} face by liquid phase epitaxial method. Provided that θ1 is an angle between a longer side direction 8 of the transducer 4 and a crystal direction of magnetic thin film 2 and θ2 is an angle between a vertical direction 6 against longer side direction 8 of the transducer 4 and a supplied magnetic field direction 3 of the bias magnetic field, the magnetostatic wave device is formed so that the θ1 +θ2 is in the range of 20 deg.

5. 发明专利

JPH1064727A MAGNETOSTATIC WAVE DEVICE 失效
公开(公告)号：JPH1064727A
公开(公告)日：1998-03-06
申请号：JP22237896
申请日：1996-08-23
申请人： SHINETSU CHEMICAL CO , JAPAN BROADCASTING CORP
发明人： IKARI MASANORI , TANNO MASAYUKI , RIYUUOU TOSHIHIKO , KUKI TAKAO , NOMOTO TOSHIHIRO
IPC分类号： C30B29/28 , H01F10/24 , H01F10/28
摘要： PROBLEM TO BE SOLVED: To obtain a magnetostatic wave device having good temperature characteristics and being useful for a magnetostatic wave applied microwave band filter, resonator, S/N enhancer, etc. SOLUTION: About a magnetostatic wave device composed by a garnet magnetic thin film 2 for a magnetostatic wave device, a transducer 4 to excite magnetostatic wave on the magnetic thin film 2, and a bias magnetic field 3, the garnet magnetic thin film 2 is formed on the Gd3 Ga5 O12 substrate 1 one to five degrees off angled from 110} face by liquid phase epitaxial method and the angle θ1 +θ2 shall be 20-35 deg. or -20-35 deg. (θ1 and θ2 are plus for clockwise and minus for counterclockwise) provided that θ1 is an angle between longer side direction 8 of the transducer 4 and the crystal direction 7 of the magnetic thin film 2 and θ2 is an angle between a vertical direction 6 against to longer side direction of the transducer 4 and the supplied magnetic field direction 3 of the bias magnetic field.

6. 发明专利

JP2003262828A OPTICAL CIRCULATOR 审中-公开
公开(公告)号：JP2003262828A
公开(公告)日：2003-09-19
申请号：JP2002062830
申请日：2002-03-08
申请人： SHINETSU CHEMICAL CO
发明人： YAGI TAEKO , IKARI MASANORI
IPC分类号： G02B27/28
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive optical circulator which is small as a whole and has its assembly cost reduced. SOLUTION: The optical circulator includes at least a first light separating and composing member, an optical walk-off member, and a second light separating and composing member arranged in this order. A first nonreciprocal optical rotator and a first reciprocal optical rotator is arranged between the first light separating and composing member and the optical walk-off member. A second nonreciprocal optical rotator and a second reciprocal optical rotator are arranged between the optical walk-off member and the second light separating and composing member. Two or more port groups consisting of a related input port, an output port, or an input/output port are arranged at the first light separating and composing member and the second light separating and composing member in parallel. COPYRIGHT: (C)2003,JPO

7. 发明专利

JP2003090985A POLARIZING ELEMENT, OPTICAL ISOLATOR USING THE SAME AND METHOD FOR MANUFACTURING THE SAME 审中-公开
公开(公告)号：JP2003090985A
公开(公告)日：2003-03-28
申请号：JP2001283440
申请日：2001-09-18
申请人： SHINETSU CHEMICAL CO
发明人： IKARI MASANORI
IPC分类号： G02B27/28
摘要： PROBLEM TO BE SOLVED: To provide a lithium niobate (LN) crystal polarizing element with high production yield and to provide an optical isolator at a low cost by using the same element. SOLUTION: The polarizing element for an optical isolator is a birefringent wedge type light polarizing element having an inclined face, and the polarizing element is made of a lithium niobate crystal. The optical axis of the crystal is inclined by ±67.5 deg. from the direction of the lines of equal thickness in the wedge of the polarizing element. An isolator unit is prepared by arranging two of the above birefringent type polarizing elements in such a manner that the direction of the lines of equal thickness in the wedges is identical, that the optical axis of the one polarizing element is inclined by +67.5 deg. from the direction of the lines of equal thickness and that the optical axis of the other polarizing element is inclined by -67.5 deg. from the line of equal thickness. A two-stage optical isolator is obtained by connecting two of the above optical isolator units in such a manner that the inclined faces of the two polarizing elements opposing to each other are shifted by 90 deg. from each other and that the optical axes of the two elements are shifted by 90 deg. from each other.

8. 发明专利

JP2002268012A OPTICAL CIRCULATOR 失效
公开(公告)号：JP2002268012A
公开(公告)日：2002-09-18
申请号：JP2001070362
申请日：2001-03-13
申请人： SHINETSU CHEMICAL CO
发明人： IKARI MASANORI
IPC分类号： G02B27/28
摘要： PROBLEM TO BE SOLVED: To provide an optical circulator which eliminates the need to stick an optical element, has high performance, and is easy to assemble. SOLUTION: The optical circulator is constituted by arranging a 1st light separating and composing material 11 which separates light into two orthogonal polarized components, a 1st nonreciprocal optical rotator 12 which rotates the planes of polarization of the polarized components by 45 deg., a 1st reciprocal optical rotator 13 which is present in a half of the optical path and rotates the planes of polarization, a 1st optical walk-off material 14 which displaces one of the two polarized components, but does not displace the other, a 2nd optical walk-off material 24 which has the displacing direction of the polarized component orthogonal to that of the 1st optical walk-off material, a 2nd reciprocal optical rotator 23 which is present in the other half of the optical path about the 1st reciprocal optical rotator, a 2nd nonreciprocal optical rotator 22 which reverses the plane of polarization of the polarized component about the 1st nonreciprocal optical rotator, and a 2nd light separating and composing material 21 which puts the polarized components together in this order.

9. 发明专利

JP2001242418A POLARIZED WAVE NON-DEPENDENCE OPTICAL ISOLATOR 失效
公开(公告)号：JP2001242418A
公开(公告)日：2001-09-07
申请号：JP2000049489
申请日：2000-02-25
申请人： SHINETSU CHEMICAL CO
发明人： IKARI MASANORI , RYUO TOSHIHIKO
IPC分类号： G02B27/28
摘要： PROBLEM TO BE SOLVED: To provide an optical isolator which is small in polarized wave dispersion, without having to provide a special polarized wave dispersion reduction means, such as a compensator. SOLUTION: The polarized wave non-dependence optical isolator disposes a Faraday rotor 4 between two double refractivity wedge plates 1 and 2, whose optical incidence and emission surfaces are an inclined plane and a non-inclined plane, the inclined planes 1a and 2a of the double refraction wedge plates 1 and 2 are disposed so as to turn to the each opposite side of the Faraday rotation element 4, and is disposed so as to be parallel together. The material of the double refractivity wedge plates 1 and 2 is lithium niobate crystal. A length L of the side, where the non-inclined planes 1b and 2b of the double refractivity wedge plates 1 and 2 face the Faraday rotor element 4, maximum thickness T, and desirably the inclined angle θ have the relations 600 μm =300 μm, θ>=6.6 deg., L>120.6θ-1.029×(T-555)-4183, and the relations 600 μm =300 μm, θ>=6.6 deg., L>120.6θ-1.029×(T-150)-939.

10. 发明专利

JP2001215445A POLARIZATION INDEPENDENT OPTICAL ISOLATOR 失效
公开(公告)号：JP2001215445A
公开(公告)日：2001-08-10
申请号：JP2000025990
申请日：2000-02-03
申请人： SHINETSU CHEMICAL CO
发明人： IKARI MASANORI , YAGI TAEKO
IPC分类号： G02B27/28
摘要： PROBLEM TO BE SOLVED: To provide an optical isolator which is improved in the arrangement parallelism accuracy of two double refractive plates arranged on both sides of a Faraday rotating element and has excellent optical characteristics while the number of parts and the man-hours for assembly are decreased. SOLUTION: The optical isolator is the polarization independent type optical isolator disposed with the two double refractive wedge plates 1 and 3 having slopes 1a and 3a and non-slopes 1b and 3b as light incident and exit surfaces by directing the outer side of the slopes 1a and 3a in parallel and disposed with the Faraday rotating element 2 therebetween and is formed by adhering and fixing parallel plates 5 and 6 having aperture openings 5A and 6A having at least an effective light incident and exit diameter between the non-slopes 1b and 3b of the respective double refractive wedge plates 1 and 3 and the light incident and exit surfaces of the Faraday rotating element 2.

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