| DOI | Resolve DOI: https://doi.org/10.1109/JLT.2018.2878501 |
|---|
| Author | Search for: Hnatovsky, Cyril1; Search for: Grobnic, Dan1; Search for: Mihailov, Stephen J.1 |
|---|
| Affiliation | - National Research Council Canada. Security and Disruptive Technologies
|
|---|
| Format | Text, Article |
|---|
| Subject | birefringence; femtosecond laser; fiber Bragg gratings; laser material processing; phase mask; phase shift |
|---|
| Abstract | Birefringent π-phase-shifted Bragg gratings for multi-parameter sensing at temperatures ~1000 °C are written inside a standard single mode silica optical fiber (SMF-28) with infrared femtosecond pulses and a special phase mask one half of which is shifted with respect to the other by 5/4 of the mask period. The birefringence is caused by the presence of light-induced sub-wavelength periodic planar nanostructures in the fiber core, whose orientation is controlled by the laser polarization, and is maximized when the laser pulse polarization is aligned perpendicular to the fiber core. The birefringence can reach ~4.2 × 10 -4 at room temperature at the 1.5 × 10 -4 level after 100 h annealing at 1000 °C. Erasure and rewriting of the planar nanostructures inside fiber Bragg gratings by changing the laser pulse polarization is demonstrated. |
|---|
| Publication date | 2018-10-31 |
|---|
| Publisher | IEEE |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 0aa6a685-9a8d-4a0a-aded-37a5721b4e73 |
|---|
| Record created | 2019-04-10 |
|---|
| Record modified | 2020-03-16 |
|---|
