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公开(公告)号：JPH11326657A
公开(公告)日：1999-11-26
申请号：JP10154799
申请日：1999-04-08
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BOSCHIS LAURA , GNAZZO ANGELANTONIO , ROSSOTTO ORIANA , TALLONE LUIGI
Abstract: PROBLEM TO BE SOLVED: To obtain a grating which has a narrow reflection factor spectrum distant from a 2nd lobe and reduced equivalent length. SOLUTION: A grating 10 formed in the core of an optical fiber 1 has a modulation profile, which is uneven and asymmetrical in refractive index along the length and the profile is represented with a curve which gradually and monotonously increases from a minimum value which is substantially zero to a maximum value. Here, the minimum value has a substantially horizontal tangent and corresponds to the end of the grating 10 and the maximum value also has a substantially horizontal tangent and corresponds to the other end of the grating 10.
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公开(公告)号：JPH10319255A
公开(公告)日：1998-12-04
申请号：JP15077798
申请日：1998-05-15
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BOSCHIS LAURA , ROSSOTTO ORIANA , TALLONE LUIGI
IPC: G02B6/13 , B29D11/00 , G02B20060101 , G02B5/18 , G02B5/26 , G02B6/02 , G02B6/10 , G02B6/124 , G02B6/136 , G02B6/255 , G02B6/293 , G02B6/34
Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for uniformly irradiating all fibers or waveguides for writing a grating. SOLUTION: This method and a device simultaneously form the same Bragg grating in a different optical fiber or waveguide, the fiber/waveguide 1 is mounted in line on a common supporting base 2 together with a phase mask 3 and the phase mask 3 gives the desired intensity distribution to a radiating beam for writing a grating. The common supporting base 2 is moved back and forth in the lateral direction to the longitudinal axis of the fiber or the waveguide at appropriately low frequency so as to expose the fiber/waveguide to the radiating beam for a time enough to start changing the refractive index when each fiber/waveguide passes through the radiating beam.
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公开(公告)号：DE949518T1
公开(公告)日：2000-04-20
申请号：DE99106984
申请日：1999-04-09
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BOSCHIS LAURA , ROSSOTTO ORIANA , GNAZZO ANGELANTONIO , TALLONE LUIGI
Abstract: A grating (10) made in the core of an optical fibre (1) presents a non-uniform and asymmetrical profile of the modulation of the refractive index in the direction of the length, which profile is represented by a curve that rises gradually and monotonically from a minimum and substantially null value, with substantially horizontal tangent, in correspondence with an end of the grating (10), until a maximum value, also with substantially horizontal tangent, which is reached in correspondence with the other end of the grating (10).
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公开(公告)号：CA2268425C
公开(公告)日：2001-10-02
申请号：CA2268425
申请日：1999-04-09
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： ROSSOTTO ORIANA , BOSCHIS LAURA , GNAZZO ANGELANTONIO , TALLONE LUIGI
Abstract: A grating made in the core of an optical fibre presents a non-uniform and asymmetrical profile of the modulation of the refractive index in the direction of the length, which profile is represented by a curve that rises gradually and monotonically from a minimum and substantially null value, with substantially horizontal tangent, in correspondence with an end of the grating, until a maximum value, also with substantially horizontal tangent, which is reached in correspondence with the other end of the grating.
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公开(公告)号：CA2268425A1
公开(公告)日：1999-10-10
申请号：CA2268425
申请日：1999-04-09
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BOSCHIS LAURA , GNAZZO ANGELANTONIO , ROSSOTTO ORIANA , TALLONE LUIGI
Abstract: A grating made in the core of an optical fibre presents a non-uniform and asymmetrical profile of the modulation of the refractive index in the direction of the length, which profile is represented by a curve that rises gradually and monotonically from a minimum and substantially null value, with substantially horizontal tangent, in correspondence with an end of the grating, until a maximum value, also with substantially horizontal tangent, which is reached in correspondence with the other end of the grating.
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Patent Agency Ranking
公开(公告)号：CA2237963C
公开(公告)日：2002-07-09
申请号：CA2237963
申请日：1998-05-19
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： TALLONE LUIGI , BOSCHIS LAURA , ROSSOTTO ORIANA
IPC: G02B6/13 , B29D11/00 , G02B20060101 , G02B5/18 , G02B5/26 , G02B6/02 , G02B6/10 , G02B6/124 , G02B6/136 , G02B6/255 , G02B6/293 , G02B6/34
Abstract: A method and a device are described for the simultaneous fabrication of iden tical Bragg gratings in different optical fibres or optical waveguides. The fibres /waveguides (1) are mounted side-by-side on a common support (2), along with a phase mas k (3), which gives the desired intensity distribution to a writing radiation of the grating. Said common support (2) is reciprocated transversally to the longitudinal axis of the fibres or waveguides, at an appropriately low frequency such that each fibre/waveguide is exposed to such a radiation, at each pass under the radiation, for a time su fficient to start a refractive index change.
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公开(公告)号：IT1305113B1
公开(公告)日：2001-04-10
申请号：ITTO981063
申请日：1998-12-21
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： TALLONE LUIGI , BOSCHIS LAURA , ROSSOTTO ORIANA
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公开(公告)号：ITTO981063D0
公开(公告)日：1998-12-21
申请号：ITTO981063
申请日：1998-12-21
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： TALLONE LUIGI , BOSCHIS LAURA , ROSSOTTO ORIANA
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公开(公告)号：ITTO970424A1
公开(公告)日：1998-11-20
申请号：ITTO970424
申请日：1997-05-20
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BOSCHIS LAURA , ROSSOTTO ORIANA , TALLONE LUIGI
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公开(公告)号：CA2237963A1
公开(公告)日：1998-11-20
申请号：CA2237963
申请日：1998-05-19
Applicant: CSELT CENTRO STUDI LAB TELECOM
Inventor： BOSCHIS LAURA , ROSSOTTO ORIANA , TALLONE LUIGI
IPC: G02B6/13 , B29D11/00 , G02B20060101 , G02B5/18 , G02B5/26 , G02B6/02 , G02B6/10 , G02B6/124 , G02B6/136 , G02B6/255 , G02B6/293 , G02B6/34
Abstract: A method and a device are described for the simultaneous fabrication of iden tical Bragg gratings in different optical fibres or optical waveguides. The fibres /waveguides (1) are mounted side-by-side on a common support (2), along with a phase mas k (3), which gives the desired intensity distribution to a writing radiation of the grating. Said common support (2) is reciprocated transversally to the longitudinal axis of the fibres or waveguides, at an appropriately low frequency such that each fibre/waveguide is exposed to such a radiation, at each pass under the radiation, for a time su fficient to start a refractive index change.
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