109 MHz optical tomography using temporal magnification.

摘要: Ultrafast optical tomographic imaging with a 109 MHz A-scan rate is achieved by using temporal magnification. Based on two four-wave mixing (FWM) time lenses carefully designed group delay dispersion, we construct system magnification factor of 48.3×. The time-lens scheme not only relaxes the requirement for pump source but also facilitates application imaging. As proof-of-concept demonstration, our achieves an axial resolution 140 μm in air (∼105  μm biosample) over 28 mm depth range sensitivity up to 55 dB. We then evaluate performance fish-eye lens at rate. Utilizing better dispersion-engineered nonlinear media, less than 5 μm biosample higher may be achieved. believe this will provide promising solution video-rate 3D