Chen Y H, Chung H P, Chang W K, Lyu H T, Chang J W, Tseng C H
Department of Optics and Photonics, National Central University, Jhongli 320, Taiwan.
Opt Express. 2012 Dec 17;20(27):28989-9001. doi: 10.1364/OE.20.028989.
We report on the design and demonstration of electro-optically tunable, multi-wavelength optical parametric generators (OPGs) based on aperiodically poled lithium niobate (APPLN) crystals. Two methods have been proposed to significantly enhance the electro-optic (EO) tunability of an APPLN OPG constructed by the aperiodic optical superlattice (AOS) technique. This is done by engineering the APPLN domain structure either in the crystal fabrication or in the crystal design process to increase the length or block-number difference of the two opposite-polarity domains used in the structure. Several orders of magnitude enhancement on the EO tuning rate of the APPLN OPGs constructed by the proposed techniques for simultaneous multiple signal wavelength generation over a conventional one has been demonstrated in a near infrared band (1500-1600 nm).
我们报道了基于非周期极化铌酸锂（APPLN）晶体的电光可调谐多波长光学参量发生器（OPG）的设计与演示。已提出两种方法来显著提高通过非周期光学超晶格（AOS）技术构建的APPLN OPG的电光（EO）可调谐性。这是通过在晶体制造或晶体设计过程中对APPLN畴结构进行工程设计来实现的，以增加结构中使用的两个相反极性畴的长度或块数差。在所提出的用于同时产生多个信号波长的技术构建的APPLN OPG的EO调谐速率方面，相对于传统的APPLN OPG，在近红外波段（1500 - 1600 nm）已证明有几个数量级的增强。
