CAJ | 학술논문

采用助熔剂提拉法,从掺入0.1%(摩尔分数)Fe2O3,0.2% MnO和11.2% K2CO3的同成分LiNbO3熔体中生长出高质量近化学计量比Mn:Fe:LiNbO3晶体.采用提拉法生长了相同掺杂的同成分晶体.与同成分晶体相比较,近化学计量比晶体的紫外吸收发生紫移,红外吸收变窄.利用二波耦合光路测试了晶体的衍射效率、增益系数和响应时间.结果显示:近化学计量比晶体的增益系数和衍射效率分别达到25 cm-1和68.3%,响应时间为亚秒级.
채용조용제제랍법,종참입0.1%(마이분수)Fe2O3,0.2% MnO화11.2% K2CO3적동성분LiNbO3용체중생장출고질량근화학계량비Mn:Fe:LiNbO3정체.채용제랍법생장료상동참잡적동성분정체.여동성분정체상비교,근화학계량비정체적자외흡수발생자이,홍외흡수변착.이용이파우합광로측시료정체적연사효솔、증익계수화향응시간.결과현시:근화학계량비정체적증익계수화연사효솔분별체도25 cm-1화68.3%,향응시간위아초급.
Near stoichiometric lithium niobate crystal doped with 0.1％ (molar fraction, the same bellow) Fe2O3 and 0.2％MnO and 11.2％ K2CO3 was grown by the flux method and congruent crystal with the same dopants was grown by Czochralski method. The crystals were characterized by ultraviolet absorption edge, and infrared spectra. The crystal has a shift in absorption towards shorter wavelength and infrared absorption peak shifts to smaller to form a sharp band. The exponential gain coefficient, diffraction efficiency and response time were measured by a two-wave coupling method. The results indicate that the exponential gain coefficient and diffraction efficiency of the near stoichiometric crystal reach to 25 cm-1 and 68.3％,respectively, while response time is less than 1 second.