Optical Microfiber All-Optical Phase Modulator for Fiber Optic Hydrophone
Minwei Li,
Yang Yu,
Yang Lu,
Xiaoyang Hu,
Yaorong Wang,
Shangpeng Qin,
Junyang Lu,
Junbo Yang,
Zhenrong Zhang
Affiliations
Minwei Li
Guangxi Key Laboratory of Multimedia Communications and Network Technology, School of Computer, Electronics and Information, Guangxi University, Nanning 530004, China
Yang Yu
College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
Yang Lu
College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410073, China
Xiaoyang Hu
College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410073, China
Yaorong Wang
College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
Shangpeng Qin
Guangxi Key Laboratory of Multimedia Communications and Network Technology, School of Computer, Electronics and Information, Guangxi University, Nanning 530004, China
Junyang Lu
Guangxi Key Laboratory of Multimedia Communications and Network Technology, School of Computer, Electronics and Information, Guangxi University, Nanning 530004, China
Junbo Yang
College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China
Zhenrong Zhang
Guangxi Key Laboratory of Multimedia Communications and Network Technology, School of Computer, Electronics and Information, Guangxi University, Nanning 530004, China
In order to meet the needs of phase generated carrier (PGC) demodulation technology for interferometric fiber optic hydrophones, we proposed an optical microfiber all-optical phase modulator (OMAOPM) based on the photo-induced thermal phase shift effect, which can be used as a phase carrier generation component, so as to make the modulation efficiency and working bandwidth of this type of modulator satisfy the requirements of underwater acoustic signal demodulation applications. We analyzed the modulation principle of this modulator and optimized the structural parameters of the optical microfiber (OM) when the waist length and waist diameter of OM are 15 mm and 1.4 μm, respectively. The modulation amplitude of the modulator can reach 1 rad, which can meet the requirements of sensing applications. On this basis, the fiber optical hydrophone PGC-Atan demodulation system was constructed, and the simulated underwater acoustic signal test demodulation research was carried out. Experimental results showed that the system can demodulate underwater acoustic signals below 1 kHz.
