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Generation of few-cycle laser pulses with high temporal contrast via nonlinear elliptical polarisation rotation in a hollow fibre compressor
摘要： We report on the simultaneous temporal filtering and compression of 30 fs laser pulses down to 5 fs duration via nonlinear elliptical polarization rotation (NER) in a stretched flexible hollow fibre compressor. Both the achieved 2-cycle pulse duration and the internal conversion efficiency of ～47% are solely limited by the applied fibre geometry. Our investigations show that precise control of the NER process could help significantly improve the temporal fidelity of high-energy hollow fibre compression schemes.
关键词： post-compression,ultrafast lasers,temporal contrast
更新于2025-09-11 14:15:04
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - A Novel Cognitive Neuromorphic Polarimetric Dynamic Vision System (pDVS) with Enhanced Discrimination and Temporal Contrast
摘要： In this preliminary study, a new cognitive vision architecture of a Polarimetric Dynamic Vision Sensor ( pDVS), is presented. The system consists of a neuromorphic camera coupled to polarization filters; a spinning wheel, namely, a light modulating wheel, operating at different speeds, is placed in front a static object. The detector system performance against different modulating speeds, under unpolarized and polarized conditions, has been tested, data were acquired and then analyzed. The outcome of this study indicates that enhanced temporal contrast resolution can be achieved, while offering unique discrimination capabilities, depending upon the light polarization states.
关键词： high-discrimination-based on light polarization states,target system design,visual information processing,high-temporal contrast,neuromorphic cognitive spike event-based Polarimetric Dynamic Vision Sensor (pDVS)
更新于2025-09-10 09:29:36