Ultrafast fiber parametric temporal imaging

Abstract

Inspired by the space-time duality, temporal imaging system has been developed as a powerful technique for single-shot real-time characterization of ultrafast optical waveforms and has recently played a key role in the investigation of various nonlinear optical dynamics such as optical rogue waves and soliton collisions. However, the true potential of temporal imaging system has not been fully unleashed owing to, for instance, limited record length and suboptimal detection sensitivity, which restricts their wider application. In this talk, we will introduce advanced temporal imaging systems based on fiber parametric process. In particular, in analogy with the spatial panoramic camera, a panoramic-reconstruction temporal imaging (PARTI) system has been developed that achieves an effective record length of 1.5 ns. Dissipative soliton collision dynamics from a microring resonator is comprehensively depicted for the first time. Besides optical dynamics measurement, we have also extended the application of temporal imaging technique to ultrafast optical tomography by enhancing the system stability with phase-lock loop (PLL) and optimizing the detection sensitivity with distributed Raman amplification (DRA). A new optical tomographic imaging modality that achieves an axial resolution of 60 m, a sensitivity of around 80 dB at tens-of-MHz A-scan rate has been experimentally demonstrated for both biological and industrial samples