Zeng Xianglong, Ashihara Satoshi, Wang Zijie, Wang Tingyun, Chen Yuping, Cha Myoungsik
Key Laboratory of Specialty Fiber Optics and Optical Access Networks, SCIE, Shanghai University, Shanghai 200072, China.
Opt Express. 2009 Sep 14;17(19):16877-84. doi: 10.1364/OE.17.016877.
We conducted a numerical study on the excitation of a two-colored temporal soliton in a segmented quasi-phase-matching (QPM) structure. The device has three parts: a periodic QPM grating for second-harmonic generation, a single domain for phase shift, and a periodic QPM grating for soliton evolution. The second harmonic pulse generated in the first grating works as a seed in the cascaded up-and-down conversions in the second grating. The numerical results showed that the second harmonic seeding enables the excitation of soliton pulses with an improved spatio-temporal intensity profile in a broad bandwidth of the wave-vector mismatch.
我们对分段准相位匹配（QPM）结构中双色时间孤子的激发进行了数值研究。该器件有三个部分：用于二次谐波产生的周期性QPM光栅、用于相移的单畴以及用于孤子演化的周期性QPM光栅。在第一个光栅中产生的二次谐波脉冲在第二个光栅的级联上下转换中作为种子。数值结果表明，二次谐波种子能够在波矢失配的宽带宽内激发具有改进的时空强度分布的孤子脉冲。
