Quasi single-mode optical fibers for telecommunications and distributed fiber-optic sensors

Sponsor: Czech Science Foundation

Principal investigator: Prof. Vladimír Vašinek, Ph.D.

Co-principal investigator: Ivan Kašík, Ph.D.

Members: Miloš Hayer, Ph.D.; Vlastimil Matějec, Ph.D.; Ondřej Podrazký, Ph.D.; Marie Pospíšilová, Ph.D.

From: 2007-01-01

To: 2009-12-31

The goal of the proposed project is to design and experimentally verify novel concept of fibre-optic structures suitable for data transmission at the telecommunication wavelengths of 1310 nm and/or 1550 nm and simultaneously capable of continuous distributed temperature sensing at the wavelength of 850 nm which properties (attenuation and dispersion) will allow their implementation into existing data transmission network (LAN, MAN). Different structures (refractive-index profiles of core and optical cladding) of the proposed “quasi single-mode fiber” will be designed on the basis of differential mode attenuation analysis and of intermodal coupling analysis of limited set of modes at the wavelength 850 nm and will be experimentally tested with the aim to maximize their temperature sensitivity. Data transmission network employing the proposed kind of fibers will allow free data transmission without limitations and simultaneously will be suitable for the detection of external temperature. The described principle can be consecutively utilized for fire risk prevention.