Abstract
We propose and experimentally demonstrate a novel technique to compensate the laser phase noise in long-range OFDR by using an optical fiber delay loop, which mainly consists of a delay fiber and a frequency shifter. The delay fiber is used to shorten the optical path difference between two arms of the interferometer, and the frequency shifter works as a counter for taking the number of lightwave circulated in the loop. The preliminary experiment shows a successful compensation effect, and a 10 cm spatial resolution over 30 km measurement range is realized by using this method.
Original language | English |
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Pages (from-to) | 220-224 |
Number of pages | 5 |
Journal | Optics Communications |
Volume | 365 |
DOIs | |
Publication status | Published - 15 Apr 2016 |
Externally published | Yes |
Keywords
- Frequency shifter
- Optical fiber delay loop
- Optical frequency domain reflectometry
- Phase noise