di Lallo A, Cino A, Conti C, Assanto G
Opt Express. 2001 Feb 12;8(4):232-7. doi: 10.1364/oe.8.000232.
We investigate efficient second harmonic generation in reverse proton exchanged Lithium Niobate waveguides. In z-cut crystals, the resulting buried and surface guides support TM and TE polarizations, respectively, and are coupled through the d 31 nonlinear element. Numerically estimated conversion efficiencies in planar structures operating at 1.32microm reach 90% in 2cm or a normalized 14% microm/Wcm.
我们研究了反向质子交换铌酸锂波导中的高效二次谐波产生。在z切割晶体中，由此产生的掩埋型和表面型波导分别支持TM和TE偏振，并通过d31非线性元件耦合。在1.32微米波长下工作的平面结构中，数值估计的转换效率在2厘米长度内达到90%，或归一化后为14%微米/瓦厘米。
