COMPRESSION OF FEW-CYCLE OPTICAL PULSES AND UNIPOLAR PULSE GENERATION DUE TO COHERENT INTERACTION WITH NONLINEAR RESONANT MEDIUM

Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki

M. V. Arkhipov¹  R. M. Arkhipov²  N. N. Rosanov³  I. V. Babushkin⁴ 

[1] Cand. Phys.-Math. Sci., St. Petersburg State University, Department of Optics ;Post-Graduate Student, St. Petersburg State University, Department of Optics ;RAS Corresponding member, Section head, D.Sc., Vavilov State Optical Institute, Saint Petersburg, 199034, Russia;Scientific researcher, PhD, Leibniz University Hannover, Hannover, 30167, Germany;

关键词: single-cycle pulse;    self-induced transparency;    unipolar pulses;    pulse compression;    soliton collision;    coherent interaction;    resonant absorbing medium;   

DOI  :  10.17586/2226-1494-2016-16-6-996-1003

来源: DOAJ

【 摘 要 】

We study theoretically thepossibility of few-cycle short bipolar optical pulse compression and their transformation to unipolar pulses due to coherent interaction with resonance absorbing medium. It is shown that single-cycle pulse compression occurs when each half-wave starts to behave as an independent unipolar soliton. These solitons are attracted to each other under certain conditions, that leads to the emergence of single-cycle pulse of shorter duration. Numerical simulations revealed3-5 times reduction of the pulse duration. The substantial absence of light loss in this scheme gives the possibility to create a multistage passive system of three resonance absorbers and results in a 125-time reduction of the pulse duration. Generation of unipolar pulses occurs when two powerful extremely short bipolar pulses propagate and collide in a dense resonant medium. In this case, as shown by numerical calculations, the mutual influence of oncoming solitons leads to the fact that some part of them is destroyed and another part is not. A high power unipolar soliton and low intensity bipolar optical ringing are observed in the medium output.

【 授权许可】

Unknown