PROJECT DETAILS
| Name: |
|
Bend sensing with long-period gratings inscribed by CO2 laser in conventional and microstructure optical fibers of selected types |
| Member: |
|
Zbyněk Berka, Ph.D.; Prof. Jiří Čtyroký, DSc.; Miloš Hayer, Ph.D.; Pavel Honzátko, Ph.D.; Miroslav Chomát, Ph.D.; Jiří Kaňka, Ph.D.; Ivan Kašík, Ph.D.; Vlastimil Matějec, Ph.D.; Marie Pospíšilová, Ph.D.; Radan Slavík, Ph.D., DSc.; Filip Todorov, Ph.D. |
| From: |
|
2006-01-01 |
|
| To: |
|
2008-12-31 |
The project is aimed at the development of two novel sensing structures in
which long-period gratings (LPGs) inscribed by a CO
2 laser in optical fibers
are employed for bend sensing. A basic feature of the first structure, built
on an LPG in a conventional fiber of a certain type, will be its
insensitivity to the external index of refraction, allowing the coated or
embedded LPGs to be reliably operated even under harsh conditions. This
structure, based on a designed fiber with a parabolic-index profile in the
cladding, will be optimized for both bending sensitivity and index
insensitivity and tested in model structural monitoring. The second
structure will be built on LPGs in microstructure fibers (MSFs). These LPGs,
which exhibit an attractive feature of temperature insensitivity, have not
been explored for bend sensing yet. First, a method for LPG inscription in
MSFs available will be developed and bending sensitivity of the produced
LPGs measured. Further, an LPG-MSF sensing structure with an arrangement of
air holes optimized for bend sensitivity, will be developed and tested.
