High-efficiency DBA-BOTDA with optimized SNR by multiple bandwidths pump modulation

Huiliang Ma; Xinhong Jia; Kai Lin; Cong Xu

doi:doi:10.3788/COL201917.010603

Chinese Optics Letters, 2019, 17 (1): 010603, Published Online: Jan. 17, 2019

High-efficiency DBA-BOTDA with optimized SNR by multiple bandwidths pump modulation Download： 677次

Huiliang Ma Xinhong Jia ^*Kai Lin Cong Xu

Author Affiliations

College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China

Figures & Tables

Fig. 1. (a) Schematic diagram of DBA-BOTDA with pump bandwidth modulation. (b) Pump bandwidth (Δν) distribution with exponential variation (blue) and proposed design with multiple bandwidths modulation (red). In (a), the position of the dotted line denotes the frequency of the optical source.

下载图片查看原文

Fig. 2. Measured (squared) and fitted (solid) pump-to-pulse gain coefficient as a function of pump bandwidth.

下载图片查看原文

Fig. 3. Experimental setup of DBA-BOTDA using pump modulation. DFB-LD, distributed feedback laser diode; EOM, electro-optic modulator; EDFA, erbium-doped fiber amplifier; PS, polarization scrambler; VOA, variable optical attenuator; FUT, fiber under test; AOM, acoustic-optic modulator; AOFS, acoustic-optic frequency shifter; AWG, arbitrary waveform generator; MWS, microwave source; TBPF, tunable bandpass filter; PD, photodetector; DAQ, data acquisition; OSA, optical spectrum analyzer; OSC, oscilloscope.

下载图片查看原文

Fig. 4. Instantaneous frequency offset of FM applied to generate the multiple bandwidths pump modulation.

下载图片查看原文

Fig. 5. (a) BGS of conventional DBA-BOTDA. (b) BGS of proposed DBA-BOTDA. (c) Comparison of Brillouin responses at 10,845 MHz. (d) Comparison of extracted BFS distributions. In (c) and (d), blue and red lines correspond to pump modulation with constant bandwidth and multiple bandwidths, respectively.

下载图片查看原文

Fig. 6. STD of BFS for conventional DBA-BOTDA (blue) and multiple bandwidths pump modulation (red).

下载图片查看原文

Fig. 7. (a), (b) Recorded pulse waveforms after transmission without (red) and with (blue) DBA for different pulse peak powers. (c) BFS distributions for various pulse peak powers. (d) The detail of BFS for the far end. Measurement is executed for the proposed multiple bandwidths pulse modulation.

下载图片查看原文

Fig. 8. Recorded pulse waveforms after transmission without (red) and with (blue) DBA for different pulse peak powers. Conventional constant bandwidth pumping is used.

下载图片查看原文

Fig. 9. (a) BFS of the hot spot as a function of temperature. (b) Extracted temperature distribution around the hot spot (∼55.8°C). Multiple bandwidths modulation is used.

下载图片查看原文

Fig. 10. Brillouin traces for different combinations of LAB and LCD.

下载图片查看原文

Table1. FOM of Refs. [13–18] and This Work

Refs.	[13]^a	[14]^b	[15]^c	[16]^d	[17]^e	[18]^f	This work
FOM	2108	6	6	1240	235	40	151

查看原文

Huiliang Ma, Xinhong Jia, Kai Lin, Cong Xu. High-efficiency DBA-BOTDA with optimized SNR by multiple bandwidths pump modulation[J]. Chinese Optics Letters, 2019, 17(1): 010603.

High-efficiency DBA-BOTDA with optimized SNR by multiple bandwidths pump modulation Download： 677次

Fig. 1. (a) Schematic diagram of DBA-BOTDA with pump bandwidth modulation. (b) Pump bandwidth (Δν) distribution with exponential variation (blue) and proposed design with multiple bandwidths modulation (red). In (a), the position of the dotted line denotes the frequency of the optical source.

Fig. 2. Measured (squared) and fitted (solid) pump-to-pulse gain coefficient as a function of pump bandwidth.

Fig. 4. Instantaneous frequency offset of FM applied to generate the multiple bandwidths pump modulation.

Fig. 6. STD of BFS for conventional DBA-BOTDA (blue) and multiple bandwidths pump modulation (red).

Fig. 7. (a), (b) Recorded pulse waveforms after transmission without (red) and with (blue) DBA for different pulse peak powers. (c) BFS distributions for various pulse peak powers. (d) The detail of BFS for the far end. Measurement is executed for the proposed multiple bandwidths pulse modulation.

Fig. 8. Recorded pulse waveforms after transmission without (red) and with (blue) DBA for different pulse peak powers. Conventional constant bandwidth pumping is used.

Fig. 9. (a) BFS of the hot spot as a function of temperature. (b) Extracted temperature distribution around the hot spot (∼55.8°C). Multiple bandwidths modulation is used.

Fig. 10. Brillouin traces for different combinations of LAB and LCD.

Table1. FOM of Refs. [13–18] and This Work

关于本站 Cookie 的使用提示

全站搜索

High-efficiency DBA-BOTDA with optimized SNR by multiple bandwidths pump modulation Download： 677次

Fig. 1. (a) Schematic diagram of DBA-BOTDA with pump bandwidth modulation. (b) Pump bandwidth (Δν) distribution with exponential variation (blue) and proposed design with multiple bandwidths modulation (red). In (a), the position of the dotted line denotes the frequency of the optical source.

Fig. 2. Measured (squared) and fitted (solid) pump-to-pulse gain coefficient as a function of pump bandwidth.

Fig. 4. Instantaneous frequency offset of FM applied to generate the multiple bandwidths pump modulation.

Fig. 6. STD of BFS for conventional DBA-BOTDA (blue) and multiple bandwidths pump modulation (red).

Fig. 7. (a), (b) Recorded pulse waveforms after transmission without (red) and with (blue) DBA for different pulse peak powers. (c) BFS distributions for various pulse peak powers. (d) The detail of BFS for the far end. Measurement is executed for the proposed multiple bandwidths pulse modulation.

Fig. 8. Recorded pulse waveforms after transmission without (red) and with (blue) DBA for different pulse peak powers. Conventional constant bandwidth pumping is used.

Fig. 9. (a) BFS of the hot spot as a function of temperature. (b) Extracted temperature distribution around the hot spot (∼55.8°C). Multiple bandwidths modulation is used.

Fig. 10. Brillouin traces for different combinations of LAB and LCD.

Table1. FOM of Refs. [13–18] and This Work

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索