Real-time optical reflectometry enabled by amplified dispersive Fourier transformation

摘要: The axial scan rate of optical frequency-domain reflectometry and coherence tomography can be increased to megahertz frequencies by dispersive Fourier transformation. However, the fundamental connection between dispersion loss creates a trade-off detection sensitivity acquisition speed. Here we circumvent this predicament using distributed Raman postamplification reflection from sample. amplification enables measurement weak signals, which are otherwise buried in detector noise. It extends depth range without sacrificing Single-shot imaging with improved at an 36.6MHz is demonstrated.