Impact of Brillouin amplification on the spatial resolution of noise-correlated Brillouin optical reflectometry

Mingjiang Zhang; Xiaoyi Bao; Jing Chai; Yongning Zhang; Ruixia Liu; Hui Liu; Yi Liu; Jianzhong Zhang

doi:doi:10.3788/COL201715.080603

Chinese Optics Letters, 2017, 15 (8): 080603, Published Online: Jul. 20, 2018

Impact of Brillouin amplification on the spatial resolution of noise-correlated Brillouin optical reflectometry Download： 1540次

Mingjiang Zhang ^1,2,3,*Xiaoyi Bao ³Jing Chai ^1,2Yongning Zhang ^1,2Ruixia Liu ^1,2Hui Liu ^1,2Yi Liu ^1,2Jianzhong Zhang ^1,2

Author Affiliations

¹ Key Lab of Advanced Transducers and Intelligent Control Systems, Ministry of Education and Shanxi Province, Taiyuan 030024, China

² Institute of Optoelectronic Engineering, College of Physics & Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China

³ Fiber Optics Group, Department of Physics, University of Ottawa, Ottawa K1N 6N5, Canada

Figures & Tables

Fig. 1. Principle diagram of the correlation between the Brillouin Stokes light and the reference light.

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Fig. 2. Experimental setup of the partially coherent BOCDR using a noise-modulated LD.

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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.

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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.

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Fig. 5. (Color online) Evaluation of the spatial resolution based on the noise-signal modulation using $(rise time + fall time) / 2$ equivalent length, with (a) a $- 10 dBm$ modulation power and (b) a $- 3 dBm$ modulation power.

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Fig. 6. (Color online) Backscattering light spectra of the pump light with a $- 10 dBm$ noise modulation power.

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Fig. 7. (Color online) Coherence length of the Brillouin Stokes light as a function of the noise modulation power with different Brillouin backscattering states.

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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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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.

Impact of Brillouin amplification on the spatial resolution of noise-correlated Brillouin optical reflectometry Download： 1540次

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 $(rise time + fall time) / 2$ equivalent length, with (a) a $- 10 dBm$ modulation power and (b) a $- 3 dBm$ modulation power.

Fig. 6. (Color online) Backscattering light spectra of the pump light with a $- 10 dBm$ noise modulation power.

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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Impact of Brillouin amplification on the spatial resolution of noise-correlated Brillouin optical reflectometry Download： 1540次

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 (rise time+fall time)/2 equivalent length, with (a) a −10 dBm modulation power and (b) a −3 dBm modulation power.

Fig. 6. (Color online) Backscattering light spectra of the pump light with a −10 dBm noise modulation power.

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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Fig. 5. (Color online) Evaluation of the spatial resolution based on the noise-signal modulation using $(rise time + fall time) / 2$ equivalent length, with (a) a $- 10 dBm$ modulation power and (b) a $- 3 dBm$ modulation power.

Fig. 6. (Color online) Backscattering light spectra of the pump light with a $- 10 dBm$ noise modulation power.