Tong Zhi, Wiberg Andreas O J, Myslivets Evgeny, Huynh Chris K, Kuo Bill P P, Alic Nikola, Radic Stojan
Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
Opt Express. 2013 Jul 29;21(15):17659-69. doi: 10.1364/OE.21.017659.
Noise performance of dual-pump, multi-sideband parametric mixer operated in phase-insensitive mode is investigated theoretically and experimentally. It is shown that, in case when a large number of multicasting idlers are generated, the noise performance is strictly dictated by the dispersion characteristics of the mixer. We find that the sideband noise performance is significantly degraded in anomalous dispersion region permitting nonlinear noise amplification. In contrast, in normal dispersion region, the noise performance converges to the level of four-sideband parametric process, rather than deteriorates with increased sideband creation. Low noise generation mandates precise dispersion-induced phase mismatch among pump and sideband waves in order to control the noise coupling. We measure the noise performance improvement for a many-sideband, multi-stage mixer by incorporating new design technique.
对以相位不敏感模式工作的双泵浦、多边带参量混频器的噪声性能进行了理论和实验研究。结果表明，在产生大量多播闲频的情况下，噪声性能严格由混频器的色散特性决定。我们发现，在允许非线性噪声放大的反常色散区域，边带噪声性能会显著下降。相比之下，在正常色散区域，噪声性能收敛到四边带参量过程的水平，而不是随着边带产生的增加而恶化。为了控制噪声耦合，低噪声产生要求泵浦波和边带波之间存在精确的色散诱导相位失配。我们通过采用新的设计技术，测量了多边带、多级混频器的噪声性能改善情况。
