Tong Zhi, Wiberg Andreas O J, Myslivets Evgeny, Kuo Bill P P, Alic Nikola, Radic Stojan
Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093, USA.
Opt Express. 2012 Aug 13;20(17):19363-73. doi: 10.1364/OE.20.019363.
Optical frequency multicasting with significantly enhanced signal-to-noise-ratio (SNR) is demonstrated over wide wavelength range. High-fidelity multicasting relies on a four-mode phase-sensitive (PS) parametric process. Four-mode seeding was used to drive dual-pump, multistage mixer and achieve high-efficiency frequency comb generation and signal replication assisted by field interference. New PS mixer was measured to possess near 12-dB of spectrally uniform optical SNR advantage over conventional, phase-insensitive (PI) parametric multicaster. In signal attenuation regime, PS operation was measured with better than 10dB over the entire mixer band, indicating highly controllable PS interference. The role of the new PS mixer in near-noiseless signal replication is elaborated.
在很宽的波长范围内演示了具有显著增强的信噪比（SNR）的光频多播。高保真多播依赖于四模相敏（PS）参量过程。使用四模种子驱动双泵浦、多级混频器，并通过场干涉辅助实现高效频率梳生成和信号复制。测量发现新型PS混频器相对于传统的、相位不敏感（PI）参量多播器在频谱上具有近12 dB的均匀光学SNR优势。在信号衰减状态下，测量到PS操作在整个混频器频段上优于10 dB，表明PS干涉具有高度可控性。阐述了新型PS混频器在近无噪声信号复制中的作用。
