Title :
Improving the Spatial Resolution of an OFDR Based on Recirculating Frequency Shifter
Author :
Jiaxiong Li ; Jiangbing Du ; Shuai Wang ; Lu Li ; Lin Sun ; Xinyu Fan ; Qingwen Liu ; Zuyuan He
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
We demonstrate a novel method for obtaining high spatial resolution optical frequency domain reflectometry (OFDR) utilizing recirculating frequency shifter for broadening the optical frequency sweeping. Twelve times broadened optical frequency sweeping is achieved. We obtain 0.97 cm spatial resolution over 710-m measurement range with modulation frequency sweeping span of 882 MHz. Such a spatial resolution corresponds to a frequency sweeping span of 10.31 GHz. The experimental results indicate that the measurement range can be extended to 10 km, based on the proposed method.
Keywords :
optical variables measurement; reflectometry; OFDR; optical frequency domain reflectometry; optical frequency sweeping; recirculating frequency shifter; spatial resolution; Amplitude modulation; Frequency modulation; Optical fibers; Optical modulation; Spatial resolution; Fiber optics sensors; optical frequency domain reflectometry; optical frequency domain reflectometry (OFDR); spatial resolution;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2484283
