Mingjiang Zhang, Xiaoyi Bao, Jing Chai, Yongning Zhang, Ruixia Liu, Hui Liu, Yi Liu, Jianzhong Zhang. Impact of Brillouin amplification on the spatial resolution of noise-correlated Brillouin optical reflectometry[J]. Chinese Optics Letters, 2017, 15(8): 080603
- Chinese Optics Letters
- Vol. 15, Issue 8, 080603 (2017)
Fig. 1. Principle diagram of the correlation between the Brillouin Stokes light and the reference light.
Fig. 2. Experimental setup of the partially coherent BOCDR using a noise-modulated LD.
Fig. 3. (Color online) Characteristics of a laser source with the noise-modulation intensity. (a) The time sequence, (b) the power spectra, (c) the optical spectra, and (d) the linewidth and the coherence length versus modulation power.
Fig. 4. (Color online) (a) The distribution of the Brillouin spectrum, and (b) the distribution of the BFS along the FUT with a 9 m long heated section.
Fig. 5. (Color online) Evaluation of the spatial resolution based on the noise-signal modulation using
Fig. 6. (Color online) Backscattering light spectra of the pump light with a
Fig. 7. (Color online) Coherence length of the Brillouin Stokes light as a function of the noise modulation power with different Brillouin backscattering states.
Fig. 8. (Color online) Measured spatial resolution, the coherence lengths of the pump light and Brillouin backscattering Stokes light, and the measured errors under different modulation powers.
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