公开(公告)号：DE3664209D1

公开(公告)日：1989-08-10

申请号：DE3664209

申请日：1986-10-28

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COCITO GIUSEPPE ,  GREGO GIORGIO ,  MODONE EROS

IPC: G02B6/00 ,  C03B37/012 ,  C03B37/018 ,  G02B6/024 ,  C23C16/04

Abstract: The method allows fabrication of optical fibres with noncircular core cross-section, with CDV technique, thanks to varying-thickness layer deposition along the internal perimeter of each section of the reaction tube wherein the fibre materials are deposited during preform fabrication.

公开(公告)号：IT8867631D0

公开(公告)日：1988-07-04

申请号：IT6763188

申请日：1988-07-04

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： GREGO GIORGIO

IPC: G02F1/225 ,  G02F1/29 ,  G02F1/295

Abstract: An electrooptic deflector composed of a plate (P) made of a material with a refractive index which can be modified by the application of an electrical field, whereinto a collimated optical beam (LE) can be injected in direction parallel to the electrodes (E) deposited on a plate face. Said electrodes (E) are parallel to one another, equally-spaced and separately connected to voltage sources apt to increase the refractive index in the material passing from an electrode to the next. The emerging optical beam (LU) is deflected in the direction wherein the refractive index increases.

公开(公告)号：DK150862C

公开(公告)日：1988-01-11

申请号：DK281582

申请日：1982-06-23

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： GREGO GIORGIO

IPC: C03B37/025 ,  G01B7/12

公开(公告)号：IT1155284B

公开(公告)日：1987-01-28

申请号：IT6714982

申请日：1982-02-10

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： COPPA GIANNI ,  GREGO GIORGIO

IPC: G01B11/06 ,  G01J9/04 ,  G01N21/35 ,  G01N21/45

Abstract: The invention is based on phase difference measurements. A Zeeman effect laser (3) generates a light beam (4) containing two radiations with slightly different frequencies whose beat is generated at the end of a path external to the material (1, 2a, 101). The same beam is split into the two component radiations (4c, 4d); the beats are generated between the first radiation, which is made to follow a path outside the material, and two radiations obtained by making the second radiation follow two different paths inside the material. The phase differences of these two beats with respect to the first are measured by a phase-comparison system (20, 21), and the refractive-index values as well as the thickness values are obtained by suitable computing means.

公开(公告)号：IT1144279B

公开(公告)日：1986-10-29

申请号：IT6793681

申请日：1981-07-06

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： GREGO GIORGIO

IPC: C03B37/025 ,  G01B7/12 ,  C03B

公开(公告)号：IT8368172D0

公开(公告)日：1983-11-10

申请号：IT6817283

申请日：1983-11-10

Applicant: CSELT CENTRO STUDI LAB TELECOM

Inventor： GREGO GIORGIO

IPC: G02B26/02 ,  G01R

Abstract: The device consists of a transparent container, partly filled with a ferromagnetic fluid surrounding a bubble of a transparent liquid. By an external magnetic field the ferromagnetic fluid is displaced within the container and moves the bubble making it pass between a light source and a light sensitive element.