Zheng D, Gordon L A, Wu Y S, Feigelson R S, Fejer M M, Byer R L, Vodopyanov K L
Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Opt Lett. 1998 Jul 1;23(13):1010-2. doi: 10.1364/ol.23.001010.
Tunable 90-ps 15.6-17.6-microm coherent radiation was generated by means of difference-frequency mixing in diffusion-bonded-stacked GaAs. The sample consisted of 24 alternately rotated layers with a total length of 6 mm and with low optical loss to achieve third-order quasi-phase matching. The wavelength-tuning curve was close to the theoretical prediction, demonstrating that the bonding process maintained nonlinear optical phase matching over the entire interaction length. Maximum conversion efficiency of 0.7%, or 5% internal quantum efficiency, was measured at 16.6 microm, consistent with the theoretical predictions.
通过在扩散键合堆叠的砷化镓中进行差频混频，产生了可调谐的90皮秒、15.6 - 17.6微米的相干辐射。该样品由24个交替旋转的层组成，总长度为6毫米，且具有低光学损耗，以实现三阶准相位匹配。波长调谐曲线接近理论预测，表明键合过程在整个相互作用长度上保持了非线性光学相位匹配。在16.6微米处测得的最大转换效率为0.7%，或内部量子效率为5%，与理论预测一致。
