新型波分复用全光纤声光器件研究

All-fiber acousto-optic device is the key component of the fiber technology. In the project all-fiber acousto-optic modulator are studied and developed. The fiber was imbedded into the surface acoustic wave (SAW) device and the surface acoustic wave modulates the light in optical fiber. Thus the all-fiber interferential modulation and demodulation can be realized. A new type of multi-channel wavelength-division -multiplex surface acoustic wave all-fiber modulator is made, and the coupled wave theory based on the interaction of multi-frequency acoustic waves and the light wave in fiber is derived. The theory and experiment on fiber Bragg grating (FBG) array sensors are studied, and the strain and temperature are measured synchronously by distributed multi-points FBG sensors in the structure. Our all-fiber acousto-optic devices are composed of multi-channel acousto-optic device and the standard single mode communication fiber. Up to now, the all-fiber acoustio-optic device is consisted of single channel SAW device and the polarization maintains fiber (PMF), and the multi-channel all-fiber acousto-optic modulator with standard communication fiber has not reports. The new device can further be developed, and increased transform efficiency to application. The project has great importance in several fields of theoretic research and application, such as all-fiber communication, distributed array fiber sensor, fiber hydrophone, fiber peg-top and difference measure and so on.

全光纤声光器件是光纤技术应用的关键器件，本项目将研制新型高效全光纤声光调制器件并首创性研制多通道波分复用全光纤声光调制器件。进行全光纤光强和相干调制及解调实验，开拓其在波分复用光纤通信中的应用研究并建立多路并行超声波与光纤导波相互作用的耦合波理论。本项目在全光通信、光纤传感、外差检测等领域具有理论意义和广泛的应用前景。