Multi-regimes electronically controlled all-fiber PM ANDI F8 laser
2018 INTERNATIONAL CONFERENCE LASER OPTICS (ICLO 2018)
Authors: Ivanenko, A. V.; Kobtsev, S. M.; Kokhanovsky, A. Y.; Smirnov, S. V.
Abstract
An all-normal dispersion figure-of-eight fibre laser which provides generation of qualitatively different pulse generation regimes (single-scale and double-scale pulses) by the electronical tuning of two laser diodes pump powers is present for the first time. Electronical tuning of the pump powers also allows one to change and control parameters of the pulse generation (pulse duration, power and energy) in a wide range for each started regime. In particular, the possibility of changing the pulse duration by a factor of 2 for each pulse generation mode is shown, and the total range of tuning by the duration of the autocorrelation function of pulses is from 30 to 100 ps. And also for the first time the possibility of an increase by a factor of 8 of the peak power of the output pulses is shown with an increase in the pulse energy from 2 to 16 nJ and at a fixed duration of the autocorrelation function of pulses of 55 ps.
Real-Time Neural Signals of Disorder and Order Perception
FRONTIERS IN PSYCHOLOGY
Authors: Li, Kaiyun; Yang, Huijing; Qi, Xiaoning; Lin, Fengxun; Chen, Gongxiang; Zhao, Minfang
Abstract
Order and disorder are prevalent in everyday life, yet little is known about the neural real-time processing that occurs during the perception of disorder relative to order. In the present study, from a cognitive perspective, by adopting the ERP method, we aimed to examine the elicited real-time neural signals of disorder and order perception when participants processed physical environmental and basic visual disorder and order pictures in an irrelevant red or green rectangle detection task, and we attempted to test the hypothesis of cognitive disfluency in disorder perception. Generally, we observed that at each measured time interval, the ERPs elicited by order stimuli were more positive (less negative) in amplitude than those elicited by disorder stimuli at the frontal electrodes (represented by F7/F8, FT7/FT8, Fz, and FCz), whereas at the posterior electrodes (represented by P7/P8, PO7/PO8, Pz, and POz), the opposite was true. These data reveal for the first time the neural underpinnings of disorder and order perception, extending our understanding of the nature of disorder and order. This study also contributes to the cognitive fluency literature and indirectly expands the research on disorder and order stimuli in cognitive fluency.