Phillips C R, Langrock Carsten, Pelc J S, Fejer M M, Hartl I, Fermann Martin E
Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305-4085, USA.
Opt Express. 2011 Sep 26;19(20):18754-73. doi: 10.1364/OE.19.018754.
We numerically investigate supercontinuum generation in quasi-phase-matched waveguides using a single-envelope approach to capture second and third order nonlinear processes involved in the generation of octave-spanning spectra. Simulations are shown to agree with experimental results in reverse-proton-exchanged lithium-niobate waveguides. The competition between χ((2)) and χ((3)) self phase modulation effects is discussed. Chirped quasi-phasematched gratings and stimulated Raman scattering are shown to enhance spectral broadening, and the pulse dynamics involved in the broadening processes are explained.
我们采用单包络方法对准相位匹配波导中的超连续谱产生进行了数值研究，以捕捉产生倍频程跨度光谱所涉及的二阶和三阶非线性过程。结果表明，模拟结果与反质子交换铌酸锂波导中的实验结果相符。讨论了χ(2)和χ(3)自相位调制效应之间的竞争。啁啾准相位匹配光栅和受激拉曼散射被证明可增强光谱展宽，并解释了展宽过程中涉及的脉冲动力学。
