CAJ | 학술논문

在铌酸锂晶体非共线相位匹配太赫兹波参量振荡器中观察到了级联光学参量效应。实验中测量到了一阶、二阶和三阶斯托克斯光。通过分析一阶、二阶和三阶斯托克斯光谱发现相邻阶斯托克斯光频率差相等，表明在太赫兹波的产生过程中发生了级联光学参量效应。在高阶级联光学参量过程中，一个泵浦光子可以产生多个太赫兹光子，表明在太赫兹波产生过程中量子转换效率会有效提高。
재니산리정체비공선상위필배태혁자파삼량진탕기중관찰도료급련광학삼량효응。실험중측량도료일계、이계화삼계사탁극사광。통과분석일계、이계화삼계사탁극사광보발현상린계사탁극사광빈솔차상등，표명재태혁자파적산생과정중발생료급련광학삼량효응。재고계급련광학삼량과정중，일개빙포광자가이산생다개태혁자광자，표명재태혁자파산생과정중양자전환효솔회유효제고。
Cascaded optical parametric processes in terahertz parametric oscillator with a noncollinear phase-matching scheme based on bulk lithium niobate were observed. The spectra of the first- , second- , and third-order Stokes waves were observed. By analyze the spectra of the first- , second- , and third-order Stokes waves it is found that the frequency difference between adjacent-order Stokes waves is approximately equivalent, which means that the high-order cascaded parametric processes have realized. With high-order cascaded terahertz parametric processes one pump photon can generate several THz photons, which means that the quantum conversion efficiency can be enhanced.