The Study and Fabrication of Quasi-phase-matched LiNbO3 Crystal Fiber

• Main Authors: Chia-Jin Lin, 林嘉進
• Other Authors: Sheng-Lung Huang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/70976947491529563337

碩士 === 國立中山大學 === 光電工程研究所 === 90 === Lithium niobate(LiNbO3) has been widely used in optical frequency converter, electro-optical modulator, surface acoustic waveguide filter, and photorefractive recording due to its ease of growth, high nonlinear coefficient, and excellent optical quality. In this thesis, we report the use of laser-heated-pedestal growth technique on LiNbO3 crystal fibers with in-situ electric field. In the process of the wavelength conversion, based on the cascaded second-order nonlinearity, we designed a 1.55-mm-band wavelength converter in optical communication, which has spectral widths for the pumping source and the output signal of 0.78nm and 80nm, respectively. In the experiment, we had grown a-axis single domain LiNbO3 crystal fiber. We also studied the dynamics of poling mechanism for various electric field. We applied 1kV/mm electric field near the Curie temperature on the LiNbO3 with the diameter up to 190mm and got a periodic domain structure of 18.9mm. The techniques are expected to be useful for in high-efficient nonlinear optical applications.