Sun Jinghua, Gale Barry J S, Reid Derryck T
Ultrafast Optics Group, School of Engineering and Physical Science, Heriot-Watt University, Edinburgh, UK.
Opt Lett. 2007 Jun 1;32(11):1396-8. doi: 10.1364/ol.32.001396.
By using a dual-color femtosecond optical parametric oscillator (OPO), a coherent waveform was synthesized from two coresonant near-infrared signal pulses whose center wavelengths had a separation of 100 nm. Immediately after the OPO cavity the pulses had independent carrier-envelope phase-slip frequencies, and synthesis was achieved by shifting these frequencies using an acousto-optic modulator driven by an internally generated difference frequency. Soliton self-frequency shifted pulses from a photonic crystal fiber and a cross-correlation frequency-resolved optical gating (XFROG) measurement were used to analyze the result of the synthesis experiment and revealed that the synthesized waveform was a train of high-contrast 30 fs pulses.
通过使用双色飞秒光学参量振荡器（OPO），从两个中心波长间隔为100 nm的共谐振近红外信号脉冲合成了一个相干波形。在OPO腔之后，脉冲立即具有独立的载波包络相移频率，并且通过使用由内部产生的差频驱动的声光调制器来移动这些频率来实现合成。来自光子晶体光纤的孤子自频移脉冲和互相关频率分辨光学门控（XFROG）测量被用于分析合成实验的结果，并揭示合成波形是一系列高对比度的30 fs脉冲。
