Abstract
Brillouin analysis of a 8.8 km-long fiber with 2 cm resolution is reported. Pump and signal are jointly modulated by a binary phase Golomb code. Over 2,000 correlation peaks are simultaneously introduced and interrogated in a single trace. All 440,000 resolution points are covered in just 211 scans of peaks positions. The pump wave is amplitude modulated by a second, 10,000 bits long code. Post-processing of the output signal provides a measurement signal-tonoise ratio that is equivalent to that of 5,000 single-pulse acquisitions. A 7cm-long hot spot is identified. The uncertainty in Brillouin frequency measurements is ±3.5 MHz.
| Original language | English |
|---|---|
| Title of host publication | 24th International Conference on Optical Fibre Sensors, OFS 2015 |
| Editors | Hypolito Jose Kalinowski, Jose Luis Fabris, Wojtek J. Bock |
| Publisher | SPIE |
| ISBN (Electronic) | 9781628418392 |
| DOIs | |
| State | Published - 2015 |
| Event | 24th International Conference on Optical Fibre Sensors, OFS 2015 - Curitiba, Brazil Duration: 28 Sep 2015 → 2 Oct 2015 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Volume | 9634 |
| ISSN (Print) | 0277-786X |
| ISSN (Electronic) | 1996-756X |
Conference
| Conference | 24th International Conference on Optical Fibre Sensors, OFS 2015 |
|---|---|
| Country/Territory | Brazil |
| City | Curitiba |
| Period | 28/09/15 → 2/10/15 |
Bibliographical note
Publisher Copyright:© 2015 SPIE.
Keywords
- All-optical signal processing
- Optical fiber sensors
- Phase codes
- Stimulated brillouin scattering