Xingliang Wu, Yingying Song, Xiaocheng Zhang, Mingjiang Zhang, Lijun Qiao, Tao Wang, Shaohua Gao, Jianzhong Zhang. Review of Brillouin Dynamic Grating[J]. Laser & Optoelectronics Progress, 2021, 58(7): 0700004
- Laser & Optoelectronics Progress
- Vol. 58, Issue 7, 0700004 (2021)
Fig. 1. Schematic diagram of Brillouin dynamic grating generation
![Experimental setup for generating BDG in polarization-maintaining fiber[2]](/richHtml/lop/2021/58/7/0700004/img_2.jpg)
Fig. 2. Experimental setup for generating BDG in polarization-maintaining fiber[2]
Fig. 3. Relationship between BDG reflection spectrum width and grating length
Fig. 4. Experimental setup for generating BDG in single-mode fiber[5]
Fig. 5. Reflection spectra of different lengths of BDG in single-mode fiber[5]. （a） L=11 m； （b） L=20 m； （c） L=50 m； （d） L=100 m
Fig. 6. Gain spectra of BDG with different wavelengths in single-mode dispersion-shifted fiber[6]
Fig. 7. Experimental setup for producing and reading BDG in a few-mode fiber[7]
Fig. 8. Local reflection spectra of BDG in a few-mode fiber[9]
Fig. 9. Experimental setup of distributed temperature and strain sensing using BDG and BGS[10]
Fig. 10. Relationship of νBire with temperature and strain[10]. (a) Under different temperature; (b) under different strain
Fig. 11. Relationship between fiber distance and intensity of chirped BDG and non-chirped BDG[11]
Fig. 12. Relationship between the intensity and distance of chirped BDG and non-chirped BDG formed at different powers[12]. (a) 78 W write pulse power; (b) 183 W write pulse power
Fig. 13. Acoustic field two-dimension distribution of phase-shifted BDG[17]
Fig. 14. Reflection spectra of phase-shifted BDG[17]
Fig. 15. Reflection spectra of phase-shifted BDG under different phase shifts of pump pulses[17]
Fig. 16. Chaotic BDG acoustic field generated in polarization-maintaining fiber[20]. (a) Three-dimensional distribution; (b) two-dimensional distribution
Fig. 17. Reflection characteristics of chaotic BDG[21]. (a) Chaotic BDG reflection spectra with different grating lengths; (b) relationship between chaotic BDG reflection spectrum width and grating length
Fig. 18. Two-dimensional distribution of random BDG acoustic field generated in polarization-maintaining fiber[25]. (a) Distribution of acoustic field; (b) BDG generation time versus position of polarization-maintaining fiber
Fig. 19. Random BDG reflection spectra generated in the polarization maintaining fiber[25]. (a) Random pulse width of 1 ns; (b) random pulse width of 1.2 ns
Fig. 20. Strain and temperature coefficient measurement[26]. (a) Strain; (b) temperature
Fig. 21. Simulation results of simultaneous measurement of temperature and strain in Panda polarization-maintaining fiber[28]. (a) Measured Brillouin and birefringent frequency shifts; (b) temperature and strain distribution after demodulation
Fig. 22. Measurement results of distributed optical fiber sensing system with high spatial resolution[31]
Fig. 23. Relations between BireFS and transverse load[34]. (a) Various load direction; (b) various load weight
Fig. 24. Reflection pulse of Brillouin dynamic grating at 3 different positions (A, B, C) in 120 m fiber[35]
Fig. 25. Optical storage is realized by using SBS effect[11]. (a) Chirped BDG is used to store the chirped signal pulse; (b) compressed signal pulse is obtained by "reading" the pulse probe grating with the chirp in the opposite direction
Fig. 26. BDG-based all-optical flip-flop[37]. (a) Flip-flop output is set by input pulse; (b) output can be switched back to low level by using the second probe pulse in the opposite phase
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Table 1. BDG in different optical fibers
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Table 2. Different types of BDG
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