- 必威体育下载

姓名
邮箱
手机号码
标题
留言内容
验证码

Abstract

Laser underwater detection has important applications in underwater target search, resource exploration, and other fields. The absorption and scattering of light by water are a big challenge to underwater detection. Absorption causes the laser signal to attenuate, thus limiting the detection distance. Scattering causes not only attenuation but also noise, the strong scattering noise can even submerge the target information. To reduce the absorption, the blue-green light band in the transmission window of water is chosen for lidar. Optically carried microwave radar (OCMR) has the advantages of resistance to turbulence and scattering. The intensity of the detection beam is modulated at radio frequency. The photons reflected by the target retain the intensity modulation information, while interference phase-out is generated between photons scattered by particles suspending in turbid water at different distances, resulting in the average of high-frequency modulation signals. The signal-to-noise ratio is improved when the received signal by the detector is correlated with the modulation signal. High-power broadband intensity modulated light source is the key to achieving the long-distance, high-precision underwater ranging with the carrier modulation method. However, the carrier modulation technology for underwater detection is limited by the development of light source. The maximum power of intensity modulation green light used in underwater detection is on the order of hundreds of milliwatts, the receiver needs to adopt a photomultiplier tube (PMT). In this paper, a laser underwater detection system is built with a 3-m-long water tank by using a home-made 532 nm light source. The maximum output power of the intensity-modulated 532 nm laser is 2.56 W. The modulation frequency is turned from 10 MHz to 2.1 GHz. Water with different attenuation coefficients is obtained by adding Mg(OH) ₂into the water tank. When the maximum modulation frequency is 500 MHz by phase ranging, 4.3 attenuation lengths(a.l.) are measured. The ranging error is about 12 cm. In the future study, a PMT will be used as the detector to increase the range resolution. We will also increase the bandwidth of the signal processing unit in order to take full advantage of the broadband intensity to modulate light source.

Keywords:

Authors and contacts

Corresponding author:Yang Su-Hui,suhuiyang@bit.edu.cn

Funds:Project supported by the National Natural Science Foundation of China (Grant Nos. 61835001, 61875011)

FullText HTML: translate this paragraph

References

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]

Cited By

DownLoad: Full-Size Img PowerPoint

样本	目标距离/m	回波信号强度/mW	衰减系数/m^–1	平均衰减系数/m^–1
1	0	160	—	0.99
	0.50	60	0.98
	1.00	22	0.99
	1.50	8	1.00
2	0	261	—	1.72
	0.50	47	1.71
	0.80	17	1.71
	1.00	8	1.74
3	0	216	—	2.97
	0.20	68	2.89
	0.30	35	3.03
	0.50	11	2.98
4	0	230	—	4.03
	0.20	47	3.97
	0.25	30	4.07
	0.40	9	4.05

DownLoad: CSV

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]

[1]	Zhao Xin-Wei, Lü Jun-Peng, Ni Zhen-Hua.Lead halide perovskites Fabry-Pérot resonant cavity laser. Acta Physica Sinica, 2021, 70(5): 054205.doi:10.7498/aps.70.20201302
[2]	Liu Xin-Yu, Yang Su-Hui, Liao Ying-Qi, Lin Xue-Tong.Laser underwater ranging based on wavelet transform. Acta Physica Sinica, 2021, 70(18): 184205.doi:10.7498/aps.70.20210569
[3]	Sun Wei, An Wei-Ming, Zhong Jia-Yong.Two-dimensional numerical study of effect of magnetic field on laser-driven Kelvin-Helmholtz instability. Acta Physica Sinica, 2020, 69(24): 244701.doi:10.7498/aps.69.20201167
[4]	Yan Chun-Hui, Wang Ting-Feng, Zhang He-Yong, Lü Tao, Wu Shi-Song.Short-range optical limited displacement resolution in laser heterodyne detection system. Acta Physica Sinica, 2017, 66(23): 234208.doi:10.7498/aps.66.234208
[5]	Zhang Yong-Yan, Wu Jiu-Hui, Zeng Tao, Zhong Hong-Min.Mechanism of eliminating the aerosol haze particles by using laser gradient force. Acta Physica Sinica, 2016, 65(7): 074203.doi:10.7498/aps.65.074203
[6]	Li Cheng-Qiang, Wang Ting-Feng, Zhang He-Yong, Xie Jing-Jiang, Liu Li-Sheng, Guo Jin.Effect of laser linewidth on the performance of heterodyne detection. Acta Physica Sinica, 2016, 65(8): 084206.doi:10.7498/aps.65.084206
[7]	Han Xiang-Lin, Zhao Zhen-Jiang, Cheng Rong-Jun, Mo Jia-Qi.Solution of the transfer models of femtosecond pulse laser for nano metal film. Acta Physica Sinica, 2013, 62(11): 110202.doi:10.7498/aps.62.110202
[8]	Sun Bing-Bing, Wu Bo, Wang Hui, Huang Zhi-Xiang, Wu Xian-Liang.Analysis of lasing in gain medium based on four-energy level atomic model. Acta Physica Sinica, 2012, 61(22): 220206.doi:10.7498/aps.61.220206
[9]	Liu Yu, Zeng Liao-Liao, Lu Yong-Le, Liu Shen, Huang Zhao-Jing.Intensity-modulated bending sensors based on rare-earth-doped fibers. Acta Physica Sinica, 2011, 60(10): 104218.doi:10.7498/aps.60.104218
[10]	Zhang Yong-Kang, Yu Shui-Sheng, Yao Hong-Bing, Wang Fei, Ren Ai-Guo, Pei Xu.Experimental study of shock waves induced by high-power pulsed laser in AZ31B magnesium alloy. Acta Physica Sinica, 2010, 59(8): 5602-5605.doi:10.7498/aps.59.5602
[11]	Huang Xiao-Dong, Zhang Xiao-Min, Wang Jian-Jun, Xu Dang-Peng, Zhang Rui, Lin Hong-Huan, Deng Ying, Geng Yuan-Chao, Yu Xiao-Qiu.The effect of dispersion on FM-AM coversion in high power laser front end. Acta Physica Sinica, 2010, 59(3): 1857-1862.doi:10.7498/aps.59.1857
[12]	Zhang Hong-Ying, Wu Shi-Gang.The dynamic process of thin films damage induced by femtosecond laser. Acta Physica Sinica, 2007, 56(9): 5314-5317.doi:10.7498/aps.56.5314
[13]	Xia Zhi-Lin, Fan Zheng-Xiu, Shao Jian-Da.Electrons-phonons collision velocity in films radiated by laser. Acta Physica Sinica, 2006, 55(6): 3007-3012.doi:10.7498/aps.55.3007
[14]	Gu Yong-Yu, Zhang Yong-Kang, Zhang Xing-Quan, Shi Jian-Guo.Theoretical study on the influence of the overlay on the pressure of laser shock wave in photomechanics. Acta Physica Sinica, 2006, 55(11): 5885-5891.doi:10.7498/aps.55.5885
[15]	Mo Jia-Qi, Zhang Wei-Jiang, He Ming.Calculation of the transmission wave of a laser pulse amplifier. Acta Physica Sinica, 2006, 55(7): 3233-3236.doi:10.7498/aps.55.3233
[16]	Chen Sui-Yuan, Liu Chang-Sheng, Li Hui-Li, Cui Tong.Hyperfine stucture during nanocrystallization of amorphous Fe73.5Cu1Nb3Si13.5B9 alloy irradiated by laser. Acta Physica Sinica, 2005, 54(9): 4157-4163.doi:10.7498/aps.54.4157
[17]	Shi Chun-Hua, Qiu Xi-Jun, An Wei-Ke, Li Ru-Xin.Influence of intense pulse laser on penetron-atomic ionization in muon-catalysed fusion. Acta Physica Sinica, 2005, 54(9): 4087-4091.doi:10.7498/aps.54.4087
[18]	Yan Sen-Lin, Chi Ze-Ying, Chen Wen-Jian, Wang Ze-Nong.Synchronization and decoding of chaotic lasers and their optimization. Acta Physica Sinica, 2004, 53(6): 1704-1709.doi:10.7498/aps.53.1704
[19]	Li Kun, Zhang Jie, Yu We.High-order harmonic generation by laser interaction with solid target using movi ng mirror model. Acta Physica Sinica, 2003, 52(6): 1412-1417.doi:10.7498/aps.52.1412
[20]	LIN XIU-CHUAN, SHAO TIAN-MIN.LUMPED METHOD FOR THE MEASUREMENT OF LASER ABSORPTANCE OF MATERIALS . Acta Physica Sinica, 2001, 50(5): 856-859.doi:10.7498/aps.50.856

Catalog

Vol. 70, Issue 8 - 2021-04-20

Metrics

Abstract views:8121
PDF Downloads:206
Cited By:0

Search

Article