Consoli Antonio, Tijero Jose Manuel G, Esquivias Ignacio
Departamento de Tecnología Fotónica, Universidad Politécnica de Madrid, ETSI de Telecomunicación, Ciudad Universitaria, 28040 Madrid,Spain.
Opt Express. 2011 May 23;19(11):10805-12. doi: 10.1364/OE.19.010805.
We present a novel implementation of the "phase reconstruction using optical ultra fast differentiation" (PROUD) technique and apply it to characterize the time resolved chirp of a gain switched semiconductor laser. The optical temporal differentiator is a fiber based polarization interferometer. The method provides a fast and simple recovery of the instantaneous frequency from two temporal intensity measurements, obtained by changing the spectral response of the interferometer. Pulses with different shapes and durations of hundreds of picoseconds are fully characterized in amplitude and phase. The technique is validated by comparing the measured pulse spectra with the reconstructed spectra obtained from the intensity and the recovered phase.
我们提出了一种“利用光学超快微分进行相位重建”（PROUD）技术的新颖实现方式，并将其应用于表征增益开关半导体激光器的时间分辨啁啾。光学时间微分器是一种基于光纤的偏振干涉仪。该方法通过改变干涉仪的光谱响应，从两个时间强度测量值中快速简单地恢复瞬时频率。具有不同形状和数百皮秒持续时间的脉冲在幅度和相位方面都得到了充分表征。通过将测量的脉冲光谱与从强度和恢复的相位获得的重建光谱进行比较，验证了该技术。
