公开(公告)号：CA2138108A1

公开(公告)日：1995-06-17

申请号：CA2138108

申请日：1994-12-14

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： DE BERNARDI CARLO ,  MORASCA SALVATORE ,  POZZI FABIO

IPC: G02B6/122 ,  G02B6/12 ,  H04J14/00 ,  H04J14/02 ,  G02B5/20 ,  G02B5/28

公开(公告)号：CA2086046A1

公开(公告)日：1993-06-24

申请号：CA2086046

申请日：1992-12-22

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： DE BERNARDI CARLO ,  MORASCA SALVATORE ,  POZZI FABIO

IPC: G01M11/02 ,  G01M11/00 ,  G01N21/45 ,  G02B6/00

Abstract: Apparatus for measuring the effective refractive index in optical fibres, in which a source (1) sends light radiations, the wavelength of which can be varied within a predetermined interval, into a fibre span (2), and a detector (5) collects the radiation outgoing from the span (2) and is connected with means (6, 7) for measuring the intensity of the radiation collected by the detector as the wavelength varies, in order to determine the oscillation period of the fibre transmittance or reflectivity and to obtain the effective refractive index from such period.