Title :
Application of Fabry-Perrot modulator to modulated LIDAR system for underwater detection
Author :
Wang, Zhaojie ; Rong, Jian ; Zhang, Xuhong ; Wang, Juanjuan
Author_Institution :
Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Frequency spectrum characteristics of the seawater show that backscattering signal has a low-pass characteristic while target reflection signal is less frequency-dependent. To improve target contrast of underwater detection, LIDAR signal is modulated to radio frequency band by Fabry-Perrot modulator. As a result, target reflection signal is bigger than backscattering signal at the modulation frequency. Through the comparison of the target contrast, we find that the best modulation frequency is about 2 GHz and the target contrast improves more than 14 times.
Keywords :
modulators; oceanographic techniques; optical modulation; optical radar; remote sensing by laser beam; seawater; Fabry-Perrot modulator application; LIDAR signal modulation; backscattering signal low pass characteristic; modulated LIDAR system; radiofrequency band; seawater frequency spectrum characteristics; target contrast; target reflection signal; underwater detection; Backscatter; Frequency modulation; Laser radar; Mirrors; Optical pulses; Fabry-Perrot modiilator; LIDAR; target contrast;
Conference_Titel :
Electronics, Communications and Control (ICECC), 2011 International Conference on
Conference_Location :
Zhejiang
Print_ISBN :
978-1-4577-0320-1
DOI :
10.1109/ICECC.2011.6066762
