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.

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

IPC: G02B5/18 ,  G02B6/02 ,  G02B6/34

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

IPC: G02B5/18 ,  G02B6/02 ,  G02B6/34

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

IPC: G02B6/13 ,  B29D11/00 ,  G02B20060101 ,  G02B5/18 ,  G02B5/26 ,  G02B6/02 ,  G02B6/10 ,  G02B6/124 ,  G02B6/136 ,  G02B6/255 ,  G02B6/293 ,  G02B6/34

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.

公开(公告)号：ITTO950259A1

公开(公告)日：1996-10-05

申请号：ITTO950259

申请日：1995-04-05

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： TALLONE LUIGI

IPC: G01N21/21 ,  G01M11/00 ,  G01N21/41 ,  G01N21/45 ,  G01N21/59

Abstract: A light beam is sent on a wafer (4), at different angles of incidence, thus giving rise to fluctuations in the transmittance of the wafer, as the angle of incidence varies, because of interference due to multiple reflections of the beam inside the wafer (4). The transmittance of the wafer (4) is measured as the angle of incidence varies; the angular positions of transmittance maxima and minima are determined with respect to a maximum or minimum corresponding to normal incidence, and the refractive index is obtained from these positions and from the number of maxima and minima in the different angles. The device performing the method is also provided.

公开(公告)号：ITTO910492D0

公开(公告)日：1991-06-28

申请号：ITTO910492

申请日：1991-06-28

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： GRECO GIORGIO ,  TALLONE LUIGI

IPC: G01J3/12 ,  G01J3/26

Abstract: The radiation to be analysed is sent onto an interference filter (6) which selects different portions of the radiation spectrum in correspondence with different incidence angles. The intensity values of the radiation outgoing from the element (6) are stored by a measuring and data processing unit (9) which processes such values with the transfer function of the element to obtain the information on the spectrum.

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

IPC: G02B5/18 ,  G02B6/02 ,  G02B6/124 ,  G02B5/26

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.

公开(公告)号：DE69605226T2

公开(公告)日：2000-05-18

申请号：DE69605226

申请日：1996-04-04

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： TALLONE LUIGI

IPC: G01N21/45

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

IPC: G02B5/18 ,  G02B6/02 ,  G02B6/124 ,  G02B5/26

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.