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1. 发明专利

JP2000284132A METHOD AND DEVICE FOR MANUFACTURING OPTICAL WAVEGUIDE TYPE DIFFRACTION GRATING 失效
公开(公告)号：JP2000284132A
公开(公告)日：2000-10-13
申请号：JP8634099
申请日：1999-03-29
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURASHIMA KIYOTAKA , MOBARA MASAICHI
IPC分类号： G02B6/13 , G02B5/18 , G02B6/02 , G02B6/024 , G02B6/10 , G02B6/17
摘要： PROBLEM TO BE SOLVED: To stably manufacture an optical waveguide type diffraction grating which has a polarization holding function and desired diffraction grating characteristics. SOLUTION: A microscope (detecting means) 10 observes a polarization holding optical fiber 1 in a direction parallel to an irradiation direction of refractive index varying exciting light A and a computer 18 finds the bearing of the optical fiber 1 according to the observed image. Then a rotary stage 12 is controlled to adjust the bearing of the optical fiber 1 so that the irradiation direction of the exciting light A and the bearing of the optical fiber 1 are orthogonal or parallel to each other. After the adjustment, the optical fiber 1 is irradiated with the refractive index varying exciting light A emitted by a laser device 14 through an amplitude modulation mask or phase grating mask.

2. 发明专利

JP2002148476A FILTER AND INTERLEAVER 失效
公开(公告)号：JP2002148476A
公开(公告)日：2002-05-22
申请号：JP2000343933
申请日：2000-11-10
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURASHIMA KIYOTAKA , INOUE SUSUMU , SUGANUMA HIROSHI , SHIOZAKI MANABU
IPC分类号： G02B5/30 , G02B6/293 , G02B27/28
摘要： PROBLEM TO BE SOLVED: To provide an interleaver which is excellent in the isolation between signal light wavelengths, and which has flat transmittance in the vicinity of the maximum transmittance. SOLUTION: The interleaver 1 is provided with a double refraction material 31, a filter 60A, a wavelength plate 41, a wavelength selective filter 51, a double refraction material 32, wavelength plates 42A and 42B, and a double refraction material 33 in order from an input port 11 to output ports 21 and 22. The wavelength selective filter 51 outputs signal light beams of a first wavelength band as a polarized component of a first direction among each signal light beam which reaches from wavelength plate 41 through a first path P1 and a second path P2, respectively, and outputs signal light beams of a second wavelength band as a polarized component of a second direction. A filter 60A is designed so that loss is the maximum in the wavelength of each signal light beam, and it gives loss to the signal light beams of the first path P1 and the second path P2.

3. 发明专利

JP2002148472A INTERLEAVER 失效
公开(公告)号：JP2002148472A
公开(公告)日：2002-05-22
申请号：JP2000343893
申请日：2000-11-10
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURASHIMA KIYOTAKA , INOUE SUSUMU , SUGANUMA HIROSHI , SHIOZAKI MANABU
IPC分类号： G02B27/28 , G02B6/293 , H04B10/00 , H04B10/27 , H04B10/29 , H04B10/02
摘要： PROBLEM TO BE SOLVED: To provide an interleaver which is excellent in the isolation between signal light wavelengths, and which has flat transmittance in the vicinity of the maximum transmittance. SOLUTION: The interleaver 1 is provided with a double refraction material 31, a wavelength plate 41, a wavelength selective filter 51, a double refraction material 32, an etalon filter 61, wavelength plates 42A and 42B, and a double refraction material 33 in order from an input port 11 to output ports 21 and 22. The wavelength selective filter 51 outputs signal light beams of a first wavelength band as a polarized component of a first direction and signal light beams of a second wavelength band as a polarized component of a second direction, among signal light beams which reach from the wavelength plate 41 through a first path P1 and a second path P2 respectively. The etalon filter 61 is designed so that the loss is the maximum in the wavelength of each signal light beam, and gives loss to all the signal light beams of a third path P3, a fourth path P4, a fifth path P5, and a sixth path P6.

4. 发明专利

JP2000249869A OPTICAL FIBER MODULE 失效
公开(公告)号：JP2000249869A
公开(公告)日：2000-09-14
申请号：JP5492599
申请日：1999-03-03
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURASHIMA KIYOTAKA , MOBARA MASAICHI
IPC分类号： G02B6/34 , G02B6/02 , G02B6/10
摘要： PROBLEM TO BE SOLVED: To prevent the reflection wavelength of a diffraction grating from being changed by a temperature change when mounting an optical fiber with the diffraction grating to a fixing member, such as a substrate. SOLUTION: A portion of the optical fiber 1 including the diffraction grating 2 of the optical fiber 3 with the diffraction grating formed with the diffraction grating 2 in part in the longitudinal direction of the optical fiber 1 is fixed along a holding member 4 consisting of a material having a negative coefficient of thermal expansion, by which the temperature compensation of the optical fiber with the diffraction grating is effected and the holding member 4 is fixed to the fixing member 6, such as the substrate. As a result, the thermal expansion and the change in the refractive index accompanying the temperature change of the optical fiber 3 with the diffraction grating are compensated by the fixation of the holding member 4 having the negative coefficient of thermal expansion and the occurrence of a deviation in the reflection wavelength is averted.

5. 发明专利

JP2000214316A PRODUCTION OF FIBER GRATING AND APPARATUS FOR PRODUCTION THEREFOR 失效
公开(公告)号：JP2000214316A
公开(公告)日：2000-08-04
申请号：JP1408299
申请日：1999-01-22
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURASHIMA KIYOTAKA , SAKAI KAZUAKI , INOUE SUSUMU , MORIYA TOMOMI
IPC分类号： G02B5/18 , G02B6/02 , G02B6/10
摘要： PROBLEM TO BE SOLVED: To lessen the influence of stray light when forming fiber gratings by irradiation with UV interference patterns. SOLUTION: The optical terminals which include plural acute angles in a cross-sectional shape and are constant in a longitudinal direction are arranged on the side opposite to the side of an optical fiber 12 to be irradiate with the UV interference patterns in such a manner that the directions of the plural ridge lines 18a to 18f formed at the apexes of the acute angles included in the cross-sectional shape of the optical terminals described above are in parallel with the longitudinal direction of the optical fiber 12. The fiber gratings which absorb the UV light transmitted through the neighborhood of the optical fiber 12 and the UV light refracted and transmitted through the optical fiber 12 by the optical terminals 17, suppress the generation of the stray light and have an excellent shielding characteristic is thereby obtained.

6. 发明专利

JP2000199824A OPTICAL WAVEGUIDE DIFFRACTION GRID 失效
公开(公告)号：JP2000199824A
公开(公告)日：2000-07-18
申请号：JP193699
申请日：1999-01-07
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： INOUE SUSUMU , SAKAI KAZUAKI , MURASHIMA KIYOTAKA
IPC分类号： G02B5/18 , G02B6/02 , G02B6/10
摘要： PROBLEM TO BE SOLVED: To prevent deterioration of characteristic due to mismatching of the refractive index of fiber grating. SOLUTION: The average refractive index of an optical waveguide area 10 forming the periodical refractive index modulation of fiber grating and the refractive index of an optical waveguide area 11 without forming periodical refractive index modulation match with each other at the boundary of them and the refractive index of the area 11 without forming the periodical refractive index is prevented from increasing with respect to a distance from the boundary and becoming a discontinuous value. Thus, the mismatching point of a refractive index and a mode field distribution is removed, thereby interruption characteristic based on the stepdown of radiation loss from the mismatching point is improved and reflected light in the range of a wave length except a main reflection spectrum based on the suppression of reflection at the mismatching point is suppressed.

7. 发明专利

JP2003255159A METHOD AND APPARATUS FOR MANUFACTURING OPTICAL WAVEGUIDE TYPE DIFFRACTION GRATING ELEMENT, AND THE OPTICAL WAVEGUIDE TYPE DIFFRACTION GRATING ELEMENT 审中-公开
公开(公告)号：JP2003255159A
公开(公告)日：2003-09-10
申请号：JP2002057646
申请日：2002-03-04
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURASHIMA KIYOTAKA , HASHIMOTO TAKESHI , SHIBATA TOSHIKAZU , INOUE SUSUMU , OMURA MAKI , MOBARA MASAICHI
IPC分类号： G02B5/18 , G02B6/02 , G02B6/036 , G02B6/10 , G02B6/16
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus which can easily manufacture an optical waveguide diffraction grating with desired optical characteristics. SOLUTION: A light source 11 outputs light (refractive index variation inducing light A) of the wavelength which induces refractive index variation in a photosensitive area of an optical fiber 20. The light source 11 outputs the refractive index variation inducing light A along an axis (z) and a mirror 12 reflects and outputs the refractive index variation inducing light A along the axis (x). A stage 13 moves the mirror 12 along the axis (z). A phase grating mask 14 has a phase grating formed on one surface of a quartz glass flat plate and is arranged in parallel to a yz plane. Irradiation of the optical fiber 20 with the refractive index variation inducing light A is scanned along the axis (z) and swung along an axis (y). The position of incidence of the refractive index variation inducing light A on the phase grating mask 14 moves so as to draw a zigzag track. COPYRIGHT: (C)2003,JPO

8. 发明专利

JP2002323622A OPTICAL WAVEGUIDE TYPE DIFFRACTION GRATING ELEMENT, METHOD FOR MANUFACTURING OPTICAL WAVEGUIDE TYPE DIFFRACTION GRATING ELEMENT, MULTIPLEXING AND DEMULTIPLEXING MODULE, AND LIGHT TRANSMISSION SYSTEM 失效
公开(公告)号：JP2002323622A
公开(公告)日：2002-11-08
申请号：JP2001128150
申请日：2001-04-25
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： SHIBATA TOSHIKAZU , SUGANUMA HIROSHI , INOUE SUSUMU , SHIOZAKI MANABU , MURASHIMA KIYOTAKA
IPC分类号： G02B5/18 , G02B6/02 , G02B6/10 , G02B6/293 , G02B6/16
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a compact and easily manufacture optical waveguide type diffraction grating element which selectively reflects lights having a plurality of reflection wavelengths. SOLUTION: In the optical waveguide type diffraction grating element 100, a diffraction grating 113 on the basis of refractive index modulation is formed in a prescribed range along the longitudinal direction of a quartz-based optical fiber 110, in the core region 111 including the optical axis center to which GeO2 is added. The grid interval in the diffraction grating 113 is Λ0 , and the amplitude distribution of the refractive index modulation in a prescribed range is expressed as a sum of a periodic function Fk (where 1 /ΔΛk ) and a constant F0 (where F0 includes 0).

9. 发明专利

JP2002214455A PHASE GRATING MASK, METHOD FOR MANUFACTURING OPTICAL WAVEGUIDE TYPE DIFFRACTION GRATING ELEMENT, AND OPTICAL WAVEGUIDE TYPE DIFFRACTION GRATING ELEMENT 失效
公开(公告)号：JP2002214455A
公开(公告)日：2002-07-31
申请号：JP2001006651
申请日：2001-01-15
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURASHIMA KIYOTAKA , OMURA MAKI
IPC分类号： G02B6/122 , G02B5/18 , G02B6/02 , G02B6/10
摘要： PROBLEM TO BE SOLVED: To provide a method, etc., for manufacturing an optical waveguide type diffraction grating element having multiple reflection wavelengths at low cost and with good reproducibility. SOLUTION: A phase grating mask 1 used for this manufacturing method has phase gratings formed respectively in N mutually isolated areas 11An (n=1 to 5) on a 1st surface 11 of a flat plate 10 made of quartz glass. On the 1st surface 11, the areas 11An (n=1 to 5) where the phase gratings are formed and flat areas 11Bn (n=0 to 5) where no phase grating is formed are present alternately in the (x)-axis direction. In the areas 11An (n=1 to 5), the thickness in the (z)-axis direction changes in a cycle of 2Lg along the (x) axis, thereby forming the phase gratings.

10. 发明专利

JP2002148474A FILTER AND INTERLEAVER 失效
公开(公告)号：JP2002148474A
公开(公告)日：2002-05-22
申请号：JP2000343913
申请日：2000-11-10
申请人： SUMITOMO ELECTRIC INDUSTRIES
发明人： MURASHIMA KIYOTAKA , INOUE SUSUMU , SUGANUMA HIROSHI , SANO TOMOKI
IPC分类号： G02B27/28 , G02B6/293
摘要： PROBLEM TO BE SOLVED: To provide an interleaver which is excellent in the isolation between signal light wavelengths, and which has flat transmittance in the vicinity of the maximum transmittance. SOLUTION: The interleaver 1 is provided with a double refraction material 31, a wavelength plate 41, a wavelength selective filter 51, a double refraction material 32, a wavelength selective filter 52, an optical path length adjustment element 71, wavelength plates 42A and 42B, and a double refraction material 33 in order from an input port 11 to output ports 21 and 22. The wavelength selective filter 51 makes signal light beams of a first wavelength band which reach from the wavelength plate 41 into a polarized component of a first direction, and signal light beams of a second wavelength band into a polarized component of a second direction. The wavelength selective filter 52 converts the signal light beams (polarized component of the first direction) of the first wavelength band which reach from the double refraction material 32 through a third path P3 into signal light beams essentially consisting of the polarized component of the first direction, and converts the signal light beams (polarized component of the second direction) of the second wavelength band which reach through a fourth path P4 into signal light essentially consisting of the polarized component of the second direction.

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